1 | /* vi: set sw=4 ts=4: */
|
---|
2 | /*
|
---|
3 | * Minix shell port for busybox
|
---|
4 | *
|
---|
5 | * This version of the Minix shell was adapted for use in busybox
|
---|
6 | * by Erik Andersen <andersen@codepoet.org>
|
---|
7 | *
|
---|
8 | * - backtick expansion did not work properly
|
---|
9 | * Jonas Holmberg <jonas.holmberg@axis.com>
|
---|
10 | * Robert Schwebel <r.schwebel@pengutronix.de>
|
---|
11 | * Erik Andersen <andersen@codepoet.org>
|
---|
12 | *
|
---|
13 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
---|
14 | */
|
---|
15 |
|
---|
16 | #include <sys/times.h>
|
---|
17 | #include <setjmp.h>
|
---|
18 |
|
---|
19 | #ifdef STANDALONE
|
---|
20 | # ifndef _GNU_SOURCE
|
---|
21 | # define _GNU_SOURCE
|
---|
22 | # endif
|
---|
23 | # include <sys/types.h>
|
---|
24 | # include <sys/stat.h>
|
---|
25 | # include <sys/wait.h>
|
---|
26 | # include <signal.h>
|
---|
27 | # include <stdio.h>
|
---|
28 | # include <stdlib.h>
|
---|
29 | # include <unistd.h>
|
---|
30 | # include <string.h>
|
---|
31 | # include <errno.h>
|
---|
32 | # include <dirent.h>
|
---|
33 | # include <fcntl.h>
|
---|
34 | # include <ctype.h>
|
---|
35 | # include <assert.h>
|
---|
36 | # define bb_dev_null "/dev/null"
|
---|
37 | # define DEFAULT_SHELL "/proc/self/exe"
|
---|
38 | # define CONFIG_BUSYBOX_EXEC_PATH "/proc/self/exe"
|
---|
39 | # define bb_banner "busybox standalone"
|
---|
40 | # define ENABLE_FEATURE_SH_STANDALONE 0
|
---|
41 | # define bb_msg_memory_exhausted "memory exhausted"
|
---|
42 | # define xmalloc(size) malloc(size)
|
---|
43 | # define msh_main(argc,argv) main(argc,argv)
|
---|
44 | # define safe_read(fd,buf,count) read(fd,buf,count)
|
---|
45 | # define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1])
|
---|
46 | # define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1])
|
---|
47 | # define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
|
---|
48 | static char *find_applet_by_name(const char *applet)
|
---|
49 | {
|
---|
50 | return NULL;
|
---|
51 | }
|
---|
52 | static char *utoa_to_buf(unsigned n, char *buf, unsigned buflen)
|
---|
53 | {
|
---|
54 | unsigned i, out, res;
|
---|
55 | assert(sizeof(unsigned) == 4);
|
---|
56 | if (buflen) {
|
---|
57 | out = 0;
|
---|
58 | for (i = 1000000000; i; i /= 10) {
|
---|
59 | res = n / i;
|
---|
60 | if (res || out || i == 1) {
|
---|
61 | if (!--buflen) break;
|
---|
62 | out++;
|
---|
63 | n -= res*i;
|
---|
64 | *buf++ = '0' + res;
|
---|
65 | }
|
---|
66 | }
|
---|
67 | }
|
---|
68 | return buf;
|
---|
69 | }
|
---|
70 | static char *itoa_to_buf(int n, char *buf, unsigned buflen)
|
---|
71 | {
|
---|
72 | if (buflen && n < 0) {
|
---|
73 | n = -n;
|
---|
74 | *buf++ = '-';
|
---|
75 | buflen--;
|
---|
76 | }
|
---|
77 | return utoa_to_buf((unsigned)n, buf, buflen);
|
---|
78 | }
|
---|
79 | static char local_buf[12];
|
---|
80 | static char *itoa(int n)
|
---|
81 | {
|
---|
82 | *(itoa_to_buf(n, local_buf, sizeof(local_buf))) = '\0';
|
---|
83 | return local_buf;
|
---|
84 | }
|
---|
85 | #else
|
---|
86 | # include "busybox.h"
|
---|
87 | extern char **environ;
|
---|
88 | #endif
|
---|
89 |
|
---|
90 | /*#define MSHDEBUG 1*/
|
---|
91 |
|
---|
92 | #ifdef MSHDEBUG
|
---|
93 | int mshdbg = MSHDEBUG;
|
---|
94 |
|
---|
95 | #define DBGPRINTF(x) if (mshdbg>0) printf x
|
---|
96 | #define DBGPRINTF0(x) if (mshdbg>0) printf x
|
---|
97 | #define DBGPRINTF1(x) if (mshdbg>1) printf x
|
---|
98 | #define DBGPRINTF2(x) if (mshdbg>2) printf x
|
---|
99 | #define DBGPRINTF3(x) if (mshdbg>3) printf x
|
---|
100 | #define DBGPRINTF4(x) if (mshdbg>4) printf x
|
---|
101 | #define DBGPRINTF5(x) if (mshdbg>5) printf x
|
---|
102 | #define DBGPRINTF6(x) if (mshdbg>6) printf x
|
---|
103 | #define DBGPRINTF7(x) if (mshdbg>7) printf x
|
---|
104 | #define DBGPRINTF8(x) if (mshdbg>8) printf x
|
---|
105 | #define DBGPRINTF9(x) if (mshdbg>9) printf x
|
---|
106 |
|
---|
107 | int mshdbg_rc = 0;
|
---|
108 |
|
---|
109 | #define RCPRINTF(x) if (mshdbg_rc) printf x
|
---|
110 |
|
---|
111 | #else
|
---|
112 |
|
---|
113 | #define DBGPRINTF(x)
|
---|
114 | #define DBGPRINTF0(x) ((void)0)
|
---|
115 | #define DBGPRINTF1(x) ((void)0)
|
---|
116 | #define DBGPRINTF2(x) ((void)0)
|
---|
117 | #define DBGPRINTF3(x) ((void)0)
|
---|
118 | #define DBGPRINTF4(x) ((void)0)
|
---|
119 | #define DBGPRINTF5(x) ((void)0)
|
---|
120 | #define DBGPRINTF6(x) ((void)0)
|
---|
121 | #define DBGPRINTF7(x) ((void)0)
|
---|
122 | #define DBGPRINTF8(x) ((void)0)
|
---|
123 | #define DBGPRINTF9(x) ((void)0)
|
---|
124 |
|
---|
125 | #define RCPRINTF(x) ((void)0)
|
---|
126 |
|
---|
127 | #endif /* MSHDEBUG */
|
---|
128 |
|
---|
129 |
|
---|
130 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
|
---|
131 | # define DEFAULT_ROOT_PROMPT "\\u:\\w> "
|
---|
132 | # define DEFAULT_USER_PROMPT "\\u:\\w$ "
|
---|
133 | #else
|
---|
134 | # define DEFAULT_ROOT_PROMPT "# "
|
---|
135 | # define DEFAULT_USER_PROMPT "$ "
|
---|
136 | #endif
|
---|
137 |
|
---|
138 |
|
---|
139 | /* -------- sh.h -------- */
|
---|
140 | /*
|
---|
141 | * shell
|
---|
142 | */
|
---|
143 |
|
---|
144 | #define LINELIM 2100
|
---|
145 | #define NPUSH 8 /* limit to input nesting */
|
---|
146 |
|
---|
147 | #undef NOFILE
|
---|
148 | #define NOFILE 20 /* Number of open files */
|
---|
149 | #define NUFILE 10 /* Number of user-accessible files */
|
---|
150 | #define FDBASE 10 /* First file usable by Shell */
|
---|
151 |
|
---|
152 | /*
|
---|
153 | * values returned by wait
|
---|
154 | */
|
---|
155 | #define WAITSIG(s) ((s) & 0177)
|
---|
156 | #define WAITVAL(s) (((s) >> 8) & 0377)
|
---|
157 | #define WAITCORE(s) (((s) & 0200) != 0)
|
---|
158 |
|
---|
159 | /*
|
---|
160 | * library and system definitions
|
---|
161 | */
|
---|
162 | typedef void xint; /* base type of jmp_buf, for not broken compilers */
|
---|
163 |
|
---|
164 | /*
|
---|
165 | * shell components
|
---|
166 | */
|
---|
167 | #define NOBLOCK ((struct op *)NULL)
|
---|
168 | #define NOWORD ((char *)NULL)
|
---|
169 | #define NOWORDS ((char **)NULL)
|
---|
170 | #define NOPIPE ((int *)NULL)
|
---|
171 |
|
---|
172 | /*
|
---|
173 | * redirection
|
---|
174 | */
|
---|
175 | struct ioword {
|
---|
176 | short io_unit; /* unit affected */
|
---|
177 | short io_flag; /* action (below) */
|
---|
178 | char *io_name; /* file name */
|
---|
179 | };
|
---|
180 |
|
---|
181 | #define IOREAD 1 /* < */
|
---|
182 | #define IOHERE 2 /* << (here file) */
|
---|
183 | #define IOWRITE 4 /* > */
|
---|
184 | #define IOCAT 8 /* >> */
|
---|
185 | #define IOXHERE 16 /* ${}, ` in << */
|
---|
186 | #define IODUP 32 /* >&digit */
|
---|
187 | #define IOCLOSE 64 /* >&- */
|
---|
188 |
|
---|
189 | #define IODEFAULT (-1) /* token for default IO unit */
|
---|
190 |
|
---|
191 |
|
---|
192 | /*
|
---|
193 | * Description of a command or an operation on commands.
|
---|
194 | * Might eventually use a union.
|
---|
195 | */
|
---|
196 | struct op {
|
---|
197 | int type; /* operation type, see below */
|
---|
198 | char **words; /* arguments to a command */
|
---|
199 | struct ioword **ioact; /* IO actions (eg, < > >>) */
|
---|
200 | struct op *left;
|
---|
201 | struct op *right;
|
---|
202 | char *str; /* identifier for case and for */
|
---|
203 | };
|
---|
204 |
|
---|
205 | #define TCOM 1 /* command */
|
---|
206 | #define TPAREN 2 /* (c-list) */
|
---|
207 | #define TPIPE 3 /* a | b */
|
---|
208 | #define TLIST 4 /* a [&;] b */
|
---|
209 | #define TOR 5 /* || */
|
---|
210 | #define TAND 6 /* && */
|
---|
211 | #define TFOR 7
|
---|
212 | #define TDO 8
|
---|
213 | #define TCASE 9
|
---|
214 | #define TIF 10
|
---|
215 | #define TWHILE 11
|
---|
216 | #define TUNTIL 12
|
---|
217 | #define TELIF 13
|
---|
218 | #define TPAT 14 /* pattern in case */
|
---|
219 | #define TBRACE 15 /* {c-list} */
|
---|
220 | #define TASYNC 16 /* c & */
|
---|
221 | /* Added to support "." file expansion */
|
---|
222 | #define TDOT 17
|
---|
223 |
|
---|
224 | /* Strings for names to make debug easier */
|
---|
225 | #ifdef MSHDEBUG
|
---|
226 | static const char *const T_CMD_NAMES[] = {
|
---|
227 | "PLACEHOLDER",
|
---|
228 | "TCOM",
|
---|
229 | "TPAREN",
|
---|
230 | "TPIPE",
|
---|
231 | "TLIST",
|
---|
232 | "TOR",
|
---|
233 | "TAND",
|
---|
234 | "TFOR",
|
---|
235 | "TDO",
|
---|
236 | "TCASE",
|
---|
237 | "TIF",
|
---|
238 | "TWHILE",
|
---|
239 | "TUNTIL",
|
---|
240 | "TELIF",
|
---|
241 | "TPAT",
|
---|
242 | "TBRACE",
|
---|
243 | "TASYNC",
|
---|
244 | "TDOT",
|
---|
245 | };
|
---|
246 | #endif
|
---|
247 |
|
---|
248 | /*
|
---|
249 | * actions determining the environment of a process
|
---|
250 | */
|
---|
251 | #define FEXEC 1 /* execute without forking */
|
---|
252 |
|
---|
253 | #define AREASIZE (90000)
|
---|
254 |
|
---|
255 | /*
|
---|
256 | * flags to control evaluation of words
|
---|
257 | */
|
---|
258 | #define DOSUB 1 /* interpret $, `, and quotes */
|
---|
259 | #define DOBLANK 2 /* perform blank interpretation */
|
---|
260 | #define DOGLOB 4 /* interpret [?* */
|
---|
261 | #define DOKEY 8 /* move words with `=' to 2nd arg. list */
|
---|
262 | #define DOTRIM 16 /* trim resulting string */
|
---|
263 |
|
---|
264 | #define DOALL (DOSUB|DOBLANK|DOGLOB|DOKEY|DOTRIM)
|
---|
265 |
|
---|
266 |
|
---|
267 | struct brkcon {
|
---|
268 | jmp_buf brkpt;
|
---|
269 | struct brkcon *nextlev;
|
---|
270 | };
|
---|
271 |
|
---|
272 |
|
---|
273 | /*
|
---|
274 | * flags:
|
---|
275 | * -e: quit on error
|
---|
276 | * -k: look for name=value everywhere on command line
|
---|
277 | * -n: no execution
|
---|
278 | * -t: exit after reading and executing one command
|
---|
279 | * -v: echo as read
|
---|
280 | * -x: trace
|
---|
281 | * -u: unset variables net diagnostic
|
---|
282 | */
|
---|
283 | static char flags['z' - 'a' + 1] ALIGN1;
|
---|
284 | /* this looks weird, but is OK ... we index FLAG with 'a'...'z' */
|
---|
285 | #define FLAG (flags - 'a')
|
---|
286 |
|
---|
287 | /* moved to G: static char *trap[_NSIG + 1]; */
|
---|
288 | /* moved to G: static char ourtrap[_NSIG + 1]; */
|
---|
289 | static int trapset; /* trap pending */
|
---|
290 |
|
---|
291 | static int yynerrs; /* yacc */
|
---|
292 |
|
---|
293 | /* moved to G: static char line[LINELIM]; */
|
---|
294 |
|
---|
295 | #if ENABLE_FEATURE_EDITING
|
---|
296 | static char *current_prompt;
|
---|
297 | static line_input_t *line_input_state;
|
---|
298 | #endif
|
---|
299 |
|
---|
300 |
|
---|
301 | /*
|
---|
302 | * other functions
|
---|
303 | */
|
---|
304 | static const char *rexecve(char *c, char **v, char **envp);
|
---|
305 | static char *evalstr(char *cp, int f);
|
---|
306 | static char *putn(int n);
|
---|
307 | static char *unquote(char *as);
|
---|
308 | static int rlookup(char *n);
|
---|
309 | static struct wdblock *glob(char *cp, struct wdblock *wb);
|
---|
310 | static int my_getc(int ec);
|
---|
311 | static int subgetc(char ec, int quoted);
|
---|
312 | static char **makenv(int all, struct wdblock *wb);
|
---|
313 | static char **eval(char **ap, int f);
|
---|
314 | static int setstatus(int s);
|
---|
315 | static int waitfor(int lastpid, int canintr);
|
---|
316 |
|
---|
317 | static void onintr(int s); /* SIGINT handler */
|
---|
318 |
|
---|
319 | static int newenv(int f);
|
---|
320 | static void quitenv(void);
|
---|
321 | static void next(int f);
|
---|
322 | static void setdash(void);
|
---|
323 | static void onecommand(void);
|
---|
324 | static void runtrap(int i);
|
---|
325 |
|
---|
326 |
|
---|
327 | /* -------- area stuff -------- */
|
---|
328 |
|
---|
329 | #define REGSIZE sizeof(struct region)
|
---|
330 | #define GROWBY (256)
|
---|
331 | /* #define SHRINKBY (64) */
|
---|
332 | #undef SHRINKBY
|
---|
333 | #define FREE (32767)
|
---|
334 | #define BUSY (0)
|
---|
335 | #define ALIGN (sizeof(int)-1)
|
---|
336 |
|
---|
337 |
|
---|
338 | struct region {
|
---|
339 | struct region *next;
|
---|
340 | int area;
|
---|
341 | };
|
---|
342 |
|
---|
343 |
|
---|
344 | /* -------- grammar stuff -------- */
|
---|
345 | typedef union {
|
---|
346 | char *cp;
|
---|
347 | char **wp;
|
---|
348 | int i;
|
---|
349 | struct op *o;
|
---|
350 | } YYSTYPE;
|
---|
351 |
|
---|
352 | #define WORD 256
|
---|
353 | #define LOGAND 257
|
---|
354 | #define LOGOR 258
|
---|
355 | #define BREAK 259
|
---|
356 | #define IF 260
|
---|
357 | #define THEN 261
|
---|
358 | #define ELSE 262
|
---|
359 | #define ELIF 263
|
---|
360 | #define FI 264
|
---|
361 | #define CASE 265
|
---|
362 | #define ESAC 266
|
---|
363 | #define FOR 267
|
---|
364 | #define WHILE 268
|
---|
365 | #define UNTIL 269
|
---|
366 | #define DO 270
|
---|
367 | #define DONE 271
|
---|
368 | #define IN 272
|
---|
369 | /* Added for "." file expansion */
|
---|
370 | #define DOT 273
|
---|
371 |
|
---|
372 | #define YYERRCODE 300
|
---|
373 |
|
---|
374 | /* flags to yylex */
|
---|
375 | #define CONTIN 01 /* skip new lines to complete command */
|
---|
376 |
|
---|
377 | static struct op *pipeline(int cf);
|
---|
378 | static struct op *andor(void);
|
---|
379 | static struct op *c_list(void);
|
---|
380 | static int synio(int cf);
|
---|
381 | static void musthave(int c, int cf);
|
---|
382 | static struct op *simple(void);
|
---|
383 | static struct op *nested(int type, int mark);
|
---|
384 | static struct op *command(int cf);
|
---|
385 | static struct op *dogroup(int onlydone);
|
---|
386 | static struct op *thenpart(void);
|
---|
387 | static struct op *elsepart(void);
|
---|
388 | static struct op *caselist(void);
|
---|
389 | static struct op *casepart(void);
|
---|
390 | static char **pattern(void);
|
---|
391 | static char **wordlist(void);
|
---|
392 | static struct op *list(struct op *t1, struct op *t2);
|
---|
393 | static struct op *block(int type, struct op *t1, struct op *t2, char **wp);
|
---|
394 | static struct op *newtp(void);
|
---|
395 | static struct op *namelist(struct op *t);
|
---|
396 | static char **copyw(void);
|
---|
397 | static void word(char *cp);
|
---|
398 | static struct ioword **copyio(void);
|
---|
399 | static struct ioword *io(int u, int f, char *cp);
|
---|
400 | static int yylex(int cf);
|
---|
401 | static int collect(int c, int c1);
|
---|
402 | static int dual(int c);
|
---|
403 | static void diag(int ec);
|
---|
404 | static char *tree(unsigned size);
|
---|
405 |
|
---|
406 | /* -------- var.h -------- */
|
---|
407 |
|
---|
408 | struct var {
|
---|
409 | char *value;
|
---|
410 | char *name;
|
---|
411 | struct var *next;
|
---|
412 | char status;
|
---|
413 | };
|
---|
414 |
|
---|
415 | #define COPYV 1 /* flag to setval, suggesting copy */
|
---|
416 | #define RONLY 01 /* variable is read-only */
|
---|
417 | #define EXPORT 02 /* variable is to be exported */
|
---|
418 | #define GETCELL 04 /* name & value space was got with getcell */
|
---|
419 |
|
---|
420 | static int yyparse(void);
|
---|
421 |
|
---|
422 | static int execute(struct op *t, int *pin, int *pout, int act);
|
---|
423 |
|
---|
424 |
|
---|
425 | #define AFID_NOBUF (~0)
|
---|
426 | #define AFID_ID 0
|
---|
427 |
|
---|
428 |
|
---|
429 | /* -------- io.h -------- */
|
---|
430 | /* io buffer */
|
---|
431 | struct iobuf {
|
---|
432 | unsigned id; /* buffer id */
|
---|
433 | char buf[512]; /* buffer */
|
---|
434 | char *bufp; /* pointer into buffer */
|
---|
435 | char *ebufp; /* pointer to end of buffer */
|
---|
436 | };
|
---|
437 |
|
---|
438 | /* possible arguments to an IO function */
|
---|
439 | struct ioarg {
|
---|
440 | const char *aword;
|
---|
441 | char **awordlist;
|
---|
442 | int afile; /* file descriptor */
|
---|
443 | unsigned afid; /* buffer id */
|
---|
444 | long afpos; /* file position */
|
---|
445 | struct iobuf *afbuf; /* buffer for this file */
|
---|
446 | };
|
---|
447 |
|
---|
448 | /* an input generator's state */
|
---|
449 | struct io {
|
---|
450 | int (*iofn) (struct ioarg *, struct io *);
|
---|
451 | struct ioarg *argp;
|
---|
452 | int peekc;
|
---|
453 | char prev; /* previous character read by readc() */
|
---|
454 | char nlcount; /* for `'s */
|
---|
455 | char xchar; /* for `'s */
|
---|
456 | char task; /* reason for pushed IO */
|
---|
457 | };
|
---|
458 |
|
---|
459 | #define XOTHER 0 /* none of the below */
|
---|
460 | #define XDOLL 1 /* expanding ${} */
|
---|
461 | #define XGRAVE 2 /* expanding `'s */
|
---|
462 | #define XIO 3 /* file IO */
|
---|
463 |
|
---|
464 | /* in substitution */
|
---|
465 | #define INSUB() (e.iop->task == XGRAVE || e.iop->task == XDOLL)
|
---|
466 |
|
---|
467 | static struct ioarg temparg = { 0, 0, 0, AFID_NOBUF, 0 }; /* temporary for PUSHIO */
|
---|
468 | /* moved to G: static struct ioarg ioargstack[NPUSH]; */
|
---|
469 | static struct io iostack[NPUSH];
|
---|
470 | /* moved to G: static struct iobuf sharedbuf = { AFID_NOBUF }; */
|
---|
471 | /* moved to G: static struct iobuf mainbuf = { AFID_NOBUF }; */
|
---|
472 | static unsigned bufid = AFID_ID; /* buffer id counter */
|
---|
473 |
|
---|
474 | #define RUN(what,arg,gen) ((temparg.what = (arg)), run(&temparg,(gen)))
|
---|
475 |
|
---|
476 |
|
---|
477 | /*
|
---|
478 | * input generators for IO structure
|
---|
479 | */
|
---|
480 | static int nlchar(struct ioarg *ap);
|
---|
481 | static int strchar(struct ioarg *ap);
|
---|
482 | static int qstrchar(struct ioarg *ap);
|
---|
483 | static int filechar(struct ioarg *ap);
|
---|
484 | static int herechar(struct ioarg *ap);
|
---|
485 | static int linechar(struct ioarg *ap);
|
---|
486 | static int gravechar(struct ioarg *ap, struct io *iop);
|
---|
487 | static int qgravechar(struct ioarg *ap, struct io *iop);
|
---|
488 | static int dolchar(struct ioarg *ap);
|
---|
489 | static int wdchar(struct ioarg *ap);
|
---|
490 | static void scraphere(void);
|
---|
491 | static void freehere(int area);
|
---|
492 | static void gethere(void);
|
---|
493 | static void markhere(char *s, struct ioword *iop);
|
---|
494 | static int herein(char *hname, int xdoll);
|
---|
495 | static int run(struct ioarg *argp, int (*f) (struct ioarg *));
|
---|
496 |
|
---|
497 |
|
---|
498 | static int eofc(void);
|
---|
499 | static int readc(void);
|
---|
500 | static void unget(int c);
|
---|
501 | static void ioecho(char c);
|
---|
502 |
|
---|
503 |
|
---|
504 | /*
|
---|
505 | * IO control
|
---|
506 | */
|
---|
507 | static void pushio(struct ioarg *argp, int (*f) (struct ioarg *));
|
---|
508 | #define PUSHIO(what,arg,gen) ((temparg.what = (arg)), pushio(&temparg,(gen)))
|
---|
509 | static int remap(int fd);
|
---|
510 | static int openpipe(int *pv);
|
---|
511 | static void closepipe(int *pv);
|
---|
512 | static struct io *setbase(struct io *ip);
|
---|
513 |
|
---|
514 | /* -------- word.h -------- */
|
---|
515 |
|
---|
516 | #define NSTART 16 /* default number of words to allow for initially */
|
---|
517 |
|
---|
518 | struct wdblock {
|
---|
519 | short w_bsize;
|
---|
520 | short w_nword;
|
---|
521 | /* bounds are arbitrary */
|
---|
522 | char *w_words[1];
|
---|
523 | };
|
---|
524 |
|
---|
525 | static struct wdblock *addword(char *wd, struct wdblock *wb);
|
---|
526 | static struct wdblock *newword(int nw);
|
---|
527 | static char **getwords(struct wdblock *wb);
|
---|
528 |
|
---|
529 | /* -------- misc stuff -------- */
|
---|
530 |
|
---|
531 | static int forkexec(struct op *t, int *pin, int *pout, int act, char **wp);
|
---|
532 | static int iosetup(struct ioword *iop, int pipein, int pipeout);
|
---|
533 | static void brkset(struct brkcon *bc);
|
---|
534 | static int dolabel(struct op *t);
|
---|
535 | static int dohelp(struct op *t);
|
---|
536 | static int dochdir(struct op *t);
|
---|
537 | static int doshift(struct op *t);
|
---|
538 | static int dologin(struct op *t);
|
---|
539 | static int doumask(struct op *t);
|
---|
540 | static int doexec(struct op *t);
|
---|
541 | static int dodot(struct op *t);
|
---|
542 | static int dowait(struct op *t);
|
---|
543 | static int doread(struct op *t);
|
---|
544 | static int doeval(struct op *t);
|
---|
545 | static int dotrap(struct op *t);
|
---|
546 | static int getsig(char *s);
|
---|
547 | static void setsig(int n, sighandler_t f);
|
---|
548 | static int getn(char *as);
|
---|
549 | static int dobreak(struct op *t);
|
---|
550 | static int docontinue(struct op *t);
|
---|
551 | static int brkcontin(char *cp, int val);
|
---|
552 | static int doexit(struct op *t);
|
---|
553 | static int doexport(struct op *t);
|
---|
554 | static int doreadonly(struct op *t);
|
---|
555 | static void rdexp(char **wp, void (*f) (struct var *), int key);
|
---|
556 | static void badid(char *s);
|
---|
557 | static int doset(struct op *t);
|
---|
558 | static void varput(char *s, int out);
|
---|
559 | static int dotimes(struct op *t);
|
---|
560 | static int expand(const char *cp, struct wdblock **wbp, int f);
|
---|
561 | static char *blank(int f);
|
---|
562 | static int dollar(int quoted);
|
---|
563 | static int grave(int quoted);
|
---|
564 | static void globname(char *we, char *pp);
|
---|
565 | static char *generate(char *start1, char *end1, char *middle, char *end);
|
---|
566 | static int anyspcl(struct wdblock *wb);
|
---|
567 | static int xstrcmp(char *p1, char *p2);
|
---|
568 | static void glob0(char *a0, unsigned a1, int a2,
|
---|
569 | int (*a3) (char *, char *));
|
---|
570 | static void readhere(char **name, char *s, int ec);
|
---|
571 | static int xxchar(struct ioarg *ap);
|
---|
572 |
|
---|
573 | struct here {
|
---|
574 | char *h_tag;
|
---|
575 | int h_dosub;
|
---|
576 | struct ioword *h_iop;
|
---|
577 | struct here *h_next;
|
---|
578 | };
|
---|
579 |
|
---|
580 | static const char *const signame[] = {
|
---|
581 | "Signal 0",
|
---|
582 | "Hangup",
|
---|
583 | NULL, /* interrupt */
|
---|
584 | "Quit",
|
---|
585 | "Illegal instruction",
|
---|
586 | "Trace/BPT trap",
|
---|
587 | "Abort",
|
---|
588 | "Bus error",
|
---|
589 | "Floating Point Exception",
|
---|
590 | "Killed",
|
---|
591 | "SIGUSR1",
|
---|
592 | "SIGSEGV",
|
---|
593 | "SIGUSR2",
|
---|
594 | NULL, /* broken pipe */
|
---|
595 | "Alarm clock",
|
---|
596 | "Terminated"
|
---|
597 | };
|
---|
598 |
|
---|
599 |
|
---|
600 | struct res {
|
---|
601 | const char *r_name;
|
---|
602 | int r_val;
|
---|
603 | };
|
---|
604 | static const struct res restab[] = {
|
---|
605 | { "for" , FOR },
|
---|
606 | { "case" , CASE },
|
---|
607 | { "esac" , ESAC },
|
---|
608 | { "while", WHILE },
|
---|
609 | { "do" , DO },
|
---|
610 | { "done" , DONE },
|
---|
611 | { "if" , IF },
|
---|
612 | { "in" , IN },
|
---|
613 | { "then" , THEN },
|
---|
614 | { "else" , ELSE },
|
---|
615 | { "elif" , ELIF },
|
---|
616 | { "until", UNTIL },
|
---|
617 | { "fi" , FI },
|
---|
618 | { ";;" , BREAK },
|
---|
619 | { "||" , LOGOR },
|
---|
620 | { "&&" , LOGAND },
|
---|
621 | { "{" , '{' },
|
---|
622 | { "}" , '}' },
|
---|
623 | { "." , DOT },
|
---|
624 | { NULL , 0 },
|
---|
625 | };
|
---|
626 |
|
---|
627 | struct builtincmd {
|
---|
628 | const char *name;
|
---|
629 | int (*builtinfunc)(struct op *t);
|
---|
630 | };
|
---|
631 | static const struct builtincmd builtincmds[] = {
|
---|
632 | { "." , dodot },
|
---|
633 | { ":" , dolabel },
|
---|
634 | { "break" , dobreak },
|
---|
635 | { "cd" , dochdir },
|
---|
636 | { "continue", docontinue },
|
---|
637 | { "eval" , doeval },
|
---|
638 | { "exec" , doexec },
|
---|
639 | { "exit" , doexit },
|
---|
640 | { "export" , doexport },
|
---|
641 | { "help" , dohelp },
|
---|
642 | { "login" , dologin },
|
---|
643 | { "newgrp" , dologin },
|
---|
644 | { "read" , doread },
|
---|
645 | { "readonly", doreadonly },
|
---|
646 | { "set" , doset },
|
---|
647 | { "shift" , doshift },
|
---|
648 | { "times" , dotimes },
|
---|
649 | { "trap" , dotrap },
|
---|
650 | { "umask" , doumask },
|
---|
651 | { "wait" , dowait },
|
---|
652 | { NULL , NULL },
|
---|
653 | };
|
---|
654 |
|
---|
655 | static struct op *scantree(struct op *);
|
---|
656 | static struct op *dowholefile(int, int);
|
---|
657 |
|
---|
658 |
|
---|
659 | /* Globals */
|
---|
660 | static char **dolv;
|
---|
661 | static int dolc;
|
---|
662 | static int exstat;
|
---|
663 | static char gflg;
|
---|
664 | static int interactive; /* Is this an interactive shell */
|
---|
665 | static int execflg;
|
---|
666 | static int multiline; /* \n changed to ; */
|
---|
667 | static struct op *outtree; /* result from parser */
|
---|
668 | static xint *failpt;
|
---|
669 | static xint *errpt;
|
---|
670 | static struct brkcon *brklist;
|
---|
671 | static int isbreak;
|
---|
672 | static struct wdblock *wdlist;
|
---|
673 | static struct wdblock *iolist;
|
---|
674 |
|
---|
675 | #ifdef MSHDEBUG
|
---|
676 | static struct var *mshdbg_var;
|
---|
677 | #endif
|
---|
678 | static struct var *vlist; /* dictionary */
|
---|
679 | static struct var *homedir; /* home directory */
|
---|
680 | static struct var *prompt; /* main prompt */
|
---|
681 | static struct var *cprompt; /* continuation prompt */
|
---|
682 | static struct var *path; /* search path for commands */
|
---|
683 | static struct var *shell; /* shell to interpret command files */
|
---|
684 | static struct var *ifs; /* field separators */
|
---|
685 |
|
---|
686 | static int areanum; /* current allocation area */
|
---|
687 | static int intr; /* interrupt pending */
|
---|
688 | static int inparse;
|
---|
689 | static char *null = (char*)""; /* null value for variable */
|
---|
690 | static int heedint = 1; /* heed interrupt signals */
|
---|
691 | static void (*qflag)(int) = SIG_IGN;
|
---|
692 | static int startl;
|
---|
693 | static int peeksym;
|
---|
694 | static int nlseen;
|
---|
695 | static int iounit = IODEFAULT;
|
---|
696 | static YYSTYPE yylval;
|
---|
697 | static char *elinep; /* done in main(): = line + sizeof(line) - 5 */
|
---|
698 |
|
---|
699 | static struct here *inhere; /* list of hear docs while parsing */
|
---|
700 | static struct here *acthere; /* list of active here documents */
|
---|
701 | static struct region *areabot; /* bottom of area */
|
---|
702 | static struct region *areatop; /* top of area */
|
---|
703 | static struct region *areanxt; /* starting point of scan */
|
---|
704 | static void *brktop;
|
---|
705 | static void *brkaddr;
|
---|
706 |
|
---|
707 | /*
|
---|
708 | * parsing & execution environment
|
---|
709 | */
|
---|
710 | struct env {
|
---|
711 | char *linep;
|
---|
712 | struct io *iobase;
|
---|
713 | struct io *iop;
|
---|
714 | xint *errpt; /* void * */
|
---|
715 | int iofd;
|
---|
716 | struct env *oenv;
|
---|
717 | };
|
---|
718 |
|
---|
719 | static struct env e = {
|
---|
720 | NULL /* set to line in main() */, /* linep: char ptr */
|
---|
721 | iostack, /* iobase: struct io ptr */
|
---|
722 | iostack - 1, /* iop: struct io ptr */
|
---|
723 | (xint *) NULL, /* errpt: void ptr for errors? */
|
---|
724 | FDBASE, /* iofd: file desc */
|
---|
725 | (struct env *) NULL /* oenv: struct env ptr */
|
---|
726 | };
|
---|
727 |
|
---|
728 |
|
---|
729 | struct globals {
|
---|
730 | char ourtrap[_NSIG + 1];
|
---|
731 | char *trap[_NSIG + 1];
|
---|
732 | struct iobuf sharedbuf; /* in main(): set to { AFID_NOBUF } */
|
---|
733 | struct iobuf mainbuf; /* in main(): set to { AFID_NOBUF } */
|
---|
734 | struct ioarg ioargstack[NPUSH];
|
---|
735 | char filechar_cmdbuf[BUFSIZ];
|
---|
736 | char line[LINELIM];
|
---|
737 | char child_cmd[LINELIM];
|
---|
738 | };
|
---|
739 |
|
---|
740 | #define G (*ptr_to_globals)
|
---|
741 | #define ourtrap (G.ourtrap )
|
---|
742 | #define trap (G.trap )
|
---|
743 | #define sharedbuf (G.sharedbuf )
|
---|
744 | #define mainbuf (G.mainbuf )
|
---|
745 | #define ioargstack (G.ioargstack )
|
---|
746 | #define filechar_cmdbuf (G.filechar_cmdbuf)
|
---|
747 | #define line (G.line )
|
---|
748 | #define child_cmd (G.child_cmd )
|
---|
749 |
|
---|
750 |
|
---|
751 | #ifdef MSHDEBUG
|
---|
752 | void print_t(struct op *t)
|
---|
753 | {
|
---|
754 | DBGPRINTF(("T: t=%p, type %s, words=%p, IOword=%p\n", t,
|
---|
755 | T_CMD_NAMES[t->type], t->words, t->ioact));
|
---|
756 |
|
---|
757 | if (t->words) {
|
---|
758 | DBGPRINTF(("T: W1: %s", t->words[0]));
|
---|
759 | }
|
---|
760 | }
|
---|
761 |
|
---|
762 | void print_tree(struct op *head)
|
---|
763 | {
|
---|
764 | if (head == NULL) {
|
---|
765 | DBGPRINTF(("PRINT_TREE: no tree\n"));
|
---|
766 | return;
|
---|
767 | }
|
---|
768 |
|
---|
769 | DBGPRINTF(("NODE: %p, left %p, right %p\n", head, head->left,
|
---|
770 | head->right));
|
---|
771 |
|
---|
772 | if (head->left)
|
---|
773 | print_tree(head->left);
|
---|
774 |
|
---|
775 | if (head->right)
|
---|
776 | print_tree(head->right);
|
---|
777 | }
|
---|
778 | #endif /* MSHDEBUG */
|
---|
779 |
|
---|
780 |
|
---|
781 | /*
|
---|
782 | * IO functions
|
---|
783 | */
|
---|
784 | static void prs(const char *s)
|
---|
785 | {
|
---|
786 | if (*s)
|
---|
787 | write(2, s, strlen(s));
|
---|
788 | }
|
---|
789 |
|
---|
790 | static void prn(unsigned u)
|
---|
791 | {
|
---|
792 | prs(itoa(u));
|
---|
793 | }
|
---|
794 |
|
---|
795 | static void echo(char **wp)
|
---|
796 | {
|
---|
797 | int i;
|
---|
798 |
|
---|
799 | prs("+");
|
---|
800 | for (i = 0; wp[i]; i++) {
|
---|
801 | if (i)
|
---|
802 | prs(" ");
|
---|
803 | prs(wp[i]);
|
---|
804 | }
|
---|
805 | prs("\n");
|
---|
806 | }
|
---|
807 |
|
---|
808 | static void closef(int i)
|
---|
809 | {
|
---|
810 | if (i > 2)
|
---|
811 | close(i);
|
---|
812 | }
|
---|
813 |
|
---|
814 | static void closeall(void)
|
---|
815 | {
|
---|
816 | int u;
|
---|
817 |
|
---|
818 | for (u = NUFILE; u < NOFILE;)
|
---|
819 | close(u++);
|
---|
820 | }
|
---|
821 |
|
---|
822 |
|
---|
823 | /* fail but return to process next command */
|
---|
824 | static void fail(void) ATTRIBUTE_NORETURN;
|
---|
825 | static void fail(void)
|
---|
826 | {
|
---|
827 | longjmp(failpt, 1);
|
---|
828 | /* NOTREACHED */
|
---|
829 | }
|
---|
830 |
|
---|
831 | /* abort shell (or fail in subshell) */
|
---|
832 | static void leave(void) ATTRIBUTE_NORETURN;
|
---|
833 | static void leave(void)
|
---|
834 | {
|
---|
835 | DBGPRINTF(("LEAVE: leave called!\n"));
|
---|
836 |
|
---|
837 | if (execflg)
|
---|
838 | fail();
|
---|
839 | scraphere();
|
---|
840 | freehere(1);
|
---|
841 | runtrap(0);
|
---|
842 | _exit(exstat);
|
---|
843 | /* NOTREACHED */
|
---|
844 | }
|
---|
845 |
|
---|
846 | static void warn(const char *s)
|
---|
847 | {
|
---|
848 | if (*s) {
|
---|
849 | prs(s);
|
---|
850 | exstat = -1;
|
---|
851 | }
|
---|
852 | prs("\n");
|
---|
853 | if (FLAG['e'])
|
---|
854 | leave();
|
---|
855 | }
|
---|
856 |
|
---|
857 | static void err(const char *s)
|
---|
858 | {
|
---|
859 | warn(s);
|
---|
860 | if (FLAG['n'])
|
---|
861 | return;
|
---|
862 | if (!interactive)
|
---|
863 | leave();
|
---|
864 | if (e.errpt)
|
---|
865 | longjmp(e.errpt, 1);
|
---|
866 | closeall();
|
---|
867 | e.iop = e.iobase = iostack;
|
---|
868 | }
|
---|
869 |
|
---|
870 |
|
---|
871 | /* -------- area.c -------- */
|
---|
872 |
|
---|
873 | /*
|
---|
874 | * All memory between (char *)areabot and (char *)(areatop+1) is
|
---|
875 | * exclusively administered by the area management routines.
|
---|
876 | * It is assumed that sbrk() and brk() manipulate the high end.
|
---|
877 | */
|
---|
878 |
|
---|
879 | #define sbrk(X) ({ \
|
---|
880 | void * __q = (void *)-1; \
|
---|
881 | if (brkaddr + (int)(X) < brktop) { \
|
---|
882 | __q = brkaddr; \
|
---|
883 | brkaddr += (int)(X); \
|
---|
884 | } \
|
---|
885 | __q; \
|
---|
886 | })
|
---|
887 |
|
---|
888 | static void initarea(void)
|
---|
889 | {
|
---|
890 | brkaddr = xmalloc(AREASIZE);
|
---|
891 | brktop = brkaddr + AREASIZE;
|
---|
892 |
|
---|
893 | while ((long) sbrk(0) & ALIGN)
|
---|
894 | sbrk(1);
|
---|
895 | areabot = (struct region *) sbrk(REGSIZE);
|
---|
896 |
|
---|
897 | areabot->next = areabot;
|
---|
898 | areabot->area = BUSY;
|
---|
899 | areatop = areabot;
|
---|
900 | areanxt = areabot;
|
---|
901 | }
|
---|
902 |
|
---|
903 | static char *getcell(unsigned nbytes)
|
---|
904 | {
|
---|
905 | int nregio;
|
---|
906 | struct region *p, *q;
|
---|
907 | int i;
|
---|
908 |
|
---|
909 | if (nbytes == 0) {
|
---|
910 | puts("getcell(0)");
|
---|
911 | abort();
|
---|
912 | }
|
---|
913 | /* silly and defeats the algorithm */
|
---|
914 | /*
|
---|
915 | * round upwards and add administration area
|
---|
916 | */
|
---|
917 | nregio = (nbytes + (REGSIZE - 1)) / REGSIZE + 1;
|
---|
918 | p = areanxt;
|
---|
919 | for (;;) {
|
---|
920 | if (p->area > areanum) {
|
---|
921 | /*
|
---|
922 | * merge free cells
|
---|
923 | */
|
---|
924 | while ((q = p->next)->area > areanum && q != areanxt)
|
---|
925 | p->next = q->next;
|
---|
926 | /*
|
---|
927 | * exit loop if cell big enough
|
---|
928 | */
|
---|
929 | if (q >= p + nregio)
|
---|
930 | goto found;
|
---|
931 | }
|
---|
932 | p = p->next;
|
---|
933 | if (p == areanxt)
|
---|
934 | break;
|
---|
935 | }
|
---|
936 | i = nregio >= GROWBY ? nregio : GROWBY;
|
---|
937 | p = (struct region *) sbrk(i * REGSIZE);
|
---|
938 | if (p == (struct region *) -1)
|
---|
939 | return NULL;
|
---|
940 | p--;
|
---|
941 | if (p != areatop) {
|
---|
942 | puts("not contig");
|
---|
943 | abort(); /* allocated areas are contiguous */
|
---|
944 | }
|
---|
945 | q = p + i;
|
---|
946 | p->next = q;
|
---|
947 | p->area = FREE;
|
---|
948 | q->next = areabot;
|
---|
949 | q->area = BUSY;
|
---|
950 | areatop = q;
|
---|
951 | found:
|
---|
952 | /*
|
---|
953 | * we found a FREE area big enough, pointed to by 'p', and up to 'q'
|
---|
954 | */
|
---|
955 | areanxt = p + nregio;
|
---|
956 | if (areanxt < q) {
|
---|
957 | /*
|
---|
958 | * split into requested area and rest
|
---|
959 | */
|
---|
960 | if (areanxt + 1 > q) {
|
---|
961 | puts("OOM");
|
---|
962 | abort(); /* insufficient space left for admin */
|
---|
963 | }
|
---|
964 | areanxt->next = q;
|
---|
965 | areanxt->area = FREE;
|
---|
966 | p->next = areanxt;
|
---|
967 | }
|
---|
968 | p->area = areanum;
|
---|
969 | return (char *) (p + 1);
|
---|
970 | }
|
---|
971 |
|
---|
972 | static void freecell(char *cp)
|
---|
973 | {
|
---|
974 | struct region *p;
|
---|
975 |
|
---|
976 | p = (struct region *) cp;
|
---|
977 | if (p != NULL) {
|
---|
978 | p--;
|
---|
979 | if (p < areanxt)
|
---|
980 | areanxt = p;
|
---|
981 | p->area = FREE;
|
---|
982 | }
|
---|
983 | }
|
---|
984 | #define DELETE(obj) freecell((char *)obj)
|
---|
985 |
|
---|
986 | static void freearea(int a)
|
---|
987 | {
|
---|
988 | struct region *p, *top;
|
---|
989 |
|
---|
990 | top = areatop;
|
---|
991 | for (p = areabot; p != top; p = p->next)
|
---|
992 | if (p->area >= a)
|
---|
993 | p->area = FREE;
|
---|
994 | }
|
---|
995 |
|
---|
996 | static void setarea(char *cp, int a)
|
---|
997 | {
|
---|
998 | struct region *p;
|
---|
999 |
|
---|
1000 | p = (struct region *) cp;
|
---|
1001 | if (p != NULL)
|
---|
1002 | (p - 1)->area = a;
|
---|
1003 | }
|
---|
1004 |
|
---|
1005 | static int getarea(char *cp)
|
---|
1006 | {
|
---|
1007 | return ((struct region *) cp - 1)->area;
|
---|
1008 | }
|
---|
1009 |
|
---|
1010 | static void garbage(void)
|
---|
1011 | {
|
---|
1012 | struct region *p, *q, *top;
|
---|
1013 |
|
---|
1014 | top = areatop;
|
---|
1015 | for (p = areabot; p != top; p = p->next) {
|
---|
1016 | if (p->area > areanum) {
|
---|
1017 | while ((q = p->next)->area > areanum)
|
---|
1018 | p->next = q->next;
|
---|
1019 | areanxt = p;
|
---|
1020 | }
|
---|
1021 | }
|
---|
1022 | #ifdef SHRINKBY
|
---|
1023 | if (areatop >= q + SHRINKBY && q->area > areanum) {
|
---|
1024 | brk((char *) (q + 1));
|
---|
1025 | q->next = areabot;
|
---|
1026 | q->area = BUSY;
|
---|
1027 | areatop = q;
|
---|
1028 | }
|
---|
1029 | #endif
|
---|
1030 | }
|
---|
1031 |
|
---|
1032 | static char *space(int n)
|
---|
1033 | {
|
---|
1034 | char *cp;
|
---|
1035 |
|
---|
1036 | cp = getcell(n);
|
---|
1037 | if (cp == NULL)
|
---|
1038 | err("out of string space");
|
---|
1039 | return cp;
|
---|
1040 | }
|
---|
1041 |
|
---|
1042 | static char *strsave(const char *s, int a)
|
---|
1043 | {
|
---|
1044 | char *cp;
|
---|
1045 |
|
---|
1046 | cp = space(strlen(s) + 1);
|
---|
1047 | if (cp == NULL) {
|
---|
1048 | // FIXME: I highly doubt this is good.
|
---|
1049 | return (char*)"";
|
---|
1050 | }
|
---|
1051 | setarea(cp, a);
|
---|
1052 | strcpy(cp, s);
|
---|
1053 | return cp;
|
---|
1054 | }
|
---|
1055 |
|
---|
1056 |
|
---|
1057 | /* -------- var.c -------- */
|
---|
1058 |
|
---|
1059 | static int eqname(const char *n1, const char *n2)
|
---|
1060 | {
|
---|
1061 | for (; *n1 != '=' && *n1 != '\0'; n1++)
|
---|
1062 | if (*n2++ != *n1)
|
---|
1063 | return 0;
|
---|
1064 | return *n2 == '\0' || *n2 == '=';
|
---|
1065 | }
|
---|
1066 |
|
---|
1067 | static const char *findeq(const char *cp)
|
---|
1068 | {
|
---|
1069 | while (*cp != '\0' && *cp != '=')
|
---|
1070 | cp++;
|
---|
1071 | return cp;
|
---|
1072 | }
|
---|
1073 |
|
---|
1074 | /*
|
---|
1075 | * Find the given name in the dictionary
|
---|
1076 | * and return its value. If the name was
|
---|
1077 | * not previously there, enter it now and
|
---|
1078 | * return a null value.
|
---|
1079 | */
|
---|
1080 | static struct var *lookup(const char *n)
|
---|
1081 | {
|
---|
1082 | // FIXME: dirty hack
|
---|
1083 | static struct var dummy;
|
---|
1084 |
|
---|
1085 | struct var *vp;
|
---|
1086 | const char *cp;
|
---|
1087 | char *xp;
|
---|
1088 | int c;
|
---|
1089 |
|
---|
1090 | if (isdigit(*n)) {
|
---|
1091 | dummy.name = (char*)n;
|
---|
1092 | for (c = 0; isdigit(*n) && c < 1000; n++)
|
---|
1093 | c = c * 10 + *n - '0';
|
---|
1094 | dummy.status = RONLY;
|
---|
1095 | dummy.value = (c <= dolc ? dolv[c] : null);
|
---|
1096 | return &dummy;
|
---|
1097 | }
|
---|
1098 |
|
---|
1099 | for (vp = vlist; vp; vp = vp->next)
|
---|
1100 | if (eqname(vp->name, n))
|
---|
1101 | return vp;
|
---|
1102 |
|
---|
1103 | cp = findeq(n);
|
---|
1104 | vp = (struct var *) space(sizeof(*vp));
|
---|
1105 | if (vp == 0 || (vp->name = space((int) (cp - n) + 2)) == 0) {
|
---|
1106 | dummy.name = dummy.value = (char*)"";
|
---|
1107 | return &dummy;
|
---|
1108 | }
|
---|
1109 |
|
---|
1110 | xp = vp->name;
|
---|
1111 | while ((*xp = *n++) != '\0' && *xp != '=')
|
---|
1112 | xp++;
|
---|
1113 | *xp++ = '=';
|
---|
1114 | *xp = '\0';
|
---|
1115 | setarea((char *) vp, 0);
|
---|
1116 | setarea((char *) vp->name, 0);
|
---|
1117 | vp->value = null;
|
---|
1118 | vp->next = vlist;
|
---|
1119 | vp->status = GETCELL;
|
---|
1120 | vlist = vp;
|
---|
1121 | return vp;
|
---|
1122 | }
|
---|
1123 |
|
---|
1124 | /*
|
---|
1125 | * if name is not NULL, it must be
|
---|
1126 | * a prefix of the space `val',
|
---|
1127 | * and end with `='.
|
---|
1128 | * this is all so that exporting
|
---|
1129 | * values is reasonably painless.
|
---|
1130 | */
|
---|
1131 | static void nameval(struct var *vp, const char *val, const char *name)
|
---|
1132 | {
|
---|
1133 | const char *cp;
|
---|
1134 | char *xp;
|
---|
1135 | int fl;
|
---|
1136 |
|
---|
1137 | if (vp->status & RONLY) {
|
---|
1138 | xp = vp->name;
|
---|
1139 | while (*xp && *xp != '=')
|
---|
1140 | putc(*xp++, stderr);
|
---|
1141 | err(" is read-only");
|
---|
1142 | return;
|
---|
1143 | }
|
---|
1144 | fl = 0;
|
---|
1145 | if (name == NULL) {
|
---|
1146 | xp = space(strlen(vp->name) + strlen(val) + 2);
|
---|
1147 | if (xp == NULL)
|
---|
1148 | return;
|
---|
1149 | /* make string: name=value */
|
---|
1150 | setarea(xp, 0);
|
---|
1151 | name = xp;
|
---|
1152 | cp = vp->name;
|
---|
1153 | while ((*xp = *cp++) != '\0' && *xp != '=')
|
---|
1154 | xp++;
|
---|
1155 | *xp++ = '=';
|
---|
1156 | strcpy(xp, val);
|
---|
1157 | val = xp;
|
---|
1158 | fl = GETCELL;
|
---|
1159 | }
|
---|
1160 | if (vp->status & GETCELL)
|
---|
1161 | freecell(vp->name); /* form new string `name=value' */
|
---|
1162 | vp->name = (char*)name;
|
---|
1163 | vp->value = (char*)val;
|
---|
1164 | vp->status |= fl;
|
---|
1165 | }
|
---|
1166 |
|
---|
1167 | /*
|
---|
1168 | * give variable at `vp' the value `val'.
|
---|
1169 | */
|
---|
1170 | static void setval(struct var *vp, const char *val)
|
---|
1171 | {
|
---|
1172 | nameval(vp, val, NULL);
|
---|
1173 | }
|
---|
1174 |
|
---|
1175 | static void export(struct var *vp)
|
---|
1176 | {
|
---|
1177 | vp->status |= EXPORT;
|
---|
1178 | }
|
---|
1179 |
|
---|
1180 | static void ronly(struct var *vp)
|
---|
1181 | {
|
---|
1182 | if (isalpha(vp->name[0]) || vp->name[0] == '_') /* not an internal symbol */
|
---|
1183 | vp->status |= RONLY;
|
---|
1184 | }
|
---|
1185 |
|
---|
1186 | static int isassign(const char *s)
|
---|
1187 | {
|
---|
1188 | unsigned char c;
|
---|
1189 | DBGPRINTF7(("ISASSIGN: enter, s=%s\n", s));
|
---|
1190 |
|
---|
1191 | c = *s;
|
---|
1192 | /* no isalpha() - we shouldn't use locale */
|
---|
1193 | /* c | 0x20 - lowercase (Latin) letters */
|
---|
1194 | if (c != '_' && (unsigned)((c|0x20) - 'a') > 25)
|
---|
1195 | /* not letter */
|
---|
1196 | return 0;
|
---|
1197 |
|
---|
1198 | while (1) {
|
---|
1199 | c = *++s;
|
---|
1200 | if (c == '=')
|
---|
1201 | return 1;
|
---|
1202 | if (c == '\0')
|
---|
1203 | return 0;
|
---|
1204 | if (c != '_'
|
---|
1205 | && (unsigned)(c - '0') > 9 /* not number */
|
---|
1206 | && (unsigned)((c|0x20) - 'a') > 25 /* not letter */
|
---|
1207 | ) {
|
---|
1208 | return 0;
|
---|
1209 | }
|
---|
1210 | }
|
---|
1211 | }
|
---|
1212 |
|
---|
1213 | static int assign(const char *s, int cf)
|
---|
1214 | {
|
---|
1215 | const char *cp;
|
---|
1216 | struct var *vp;
|
---|
1217 |
|
---|
1218 | DBGPRINTF7(("ASSIGN: enter, s=%s, cf=%d\n", s, cf));
|
---|
1219 |
|
---|
1220 | if (!isalpha(*s) && *s != '_')
|
---|
1221 | return 0;
|
---|
1222 | for (cp = s; *cp != '='; cp++)
|
---|
1223 | if (*cp == '\0' || (!isalnum(*cp) && *cp != '_'))
|
---|
1224 | return 0;
|
---|
1225 | vp = lookup(s);
|
---|
1226 | nameval(vp, ++cp, cf == COPYV ? NULL : s);
|
---|
1227 | if (cf != COPYV)
|
---|
1228 | vp->status &= ~GETCELL;
|
---|
1229 | return 1;
|
---|
1230 | }
|
---|
1231 |
|
---|
1232 | static int checkname(char *cp)
|
---|
1233 | {
|
---|
1234 | DBGPRINTF7(("CHECKNAME: enter, cp=%s\n", cp));
|
---|
1235 |
|
---|
1236 | if (!isalpha(*cp++) && *(cp - 1) != '_')
|
---|
1237 | return 0;
|
---|
1238 | while (*cp)
|
---|
1239 | if (!isalnum(*cp++) && *(cp - 1) != '_')
|
---|
1240 | return 0;
|
---|
1241 | return 1;
|
---|
1242 | }
|
---|
1243 |
|
---|
1244 | static void putvlist(int f, int out)
|
---|
1245 | {
|
---|
1246 | struct var *vp;
|
---|
1247 |
|
---|
1248 | for (vp = vlist; vp; vp = vp->next) {
|
---|
1249 | if (vp->status & f && (isalpha(*vp->name) || *vp->name == '_')) {
|
---|
1250 | if (vp->status & EXPORT)
|
---|
1251 | write(out, "export ", 7);
|
---|
1252 | if (vp->status & RONLY)
|
---|
1253 | write(out, "readonly ", 9);
|
---|
1254 | write(out, vp->name, (int) (findeq(vp->name) - vp->name));
|
---|
1255 | write(out, "\n", 1);
|
---|
1256 | }
|
---|
1257 | }
|
---|
1258 | }
|
---|
1259 |
|
---|
1260 |
|
---|
1261 | /*
|
---|
1262 | * trap handling
|
---|
1263 | */
|
---|
1264 | static void sig(int i)
|
---|
1265 | {
|
---|
1266 | trapset = i;
|
---|
1267 | signal(i, sig);
|
---|
1268 | }
|
---|
1269 |
|
---|
1270 | static void runtrap(int i)
|
---|
1271 | {
|
---|
1272 | char *trapstr;
|
---|
1273 |
|
---|
1274 | trapstr = trap[i];
|
---|
1275 | if (trapstr == NULL)
|
---|
1276 | return;
|
---|
1277 |
|
---|
1278 | if (i == 0)
|
---|
1279 | trap[i] = NULL;
|
---|
1280 |
|
---|
1281 | RUN(aword, trapstr, nlchar);
|
---|
1282 | }
|
---|
1283 |
|
---|
1284 |
|
---|
1285 | static void setdash(void)
|
---|
1286 | {
|
---|
1287 | char *cp;
|
---|
1288 | int c;
|
---|
1289 | char m['z' - 'a' + 1];
|
---|
1290 |
|
---|
1291 | cp = m;
|
---|
1292 | for (c = 'a'; c <= 'z'; c++)
|
---|
1293 | if (FLAG[c])
|
---|
1294 | *cp++ = c;
|
---|
1295 | *cp = '\0';
|
---|
1296 | setval(lookup("-"), m);
|
---|
1297 | }
|
---|
1298 |
|
---|
1299 | static int newfile(char *s)
|
---|
1300 | {
|
---|
1301 | int f;
|
---|
1302 |
|
---|
1303 | DBGPRINTF7(("NEWFILE: opening %s\n", s));
|
---|
1304 |
|
---|
1305 | f = 0;
|
---|
1306 | if (NOT_LONE_DASH(s)) {
|
---|
1307 | DBGPRINTF(("NEWFILE: s is %s\n", s));
|
---|
1308 | f = open(s, O_RDONLY);
|
---|
1309 | if (f < 0) {
|
---|
1310 | prs(s);
|
---|
1311 | err(": cannot open");
|
---|
1312 | return 1;
|
---|
1313 | }
|
---|
1314 | }
|
---|
1315 |
|
---|
1316 | next(remap(f));
|
---|
1317 | return 0;
|
---|
1318 | }
|
---|
1319 |
|
---|
1320 |
|
---|
1321 | struct op *scantree(struct op *head)
|
---|
1322 | {
|
---|
1323 | struct op *dotnode;
|
---|
1324 |
|
---|
1325 | if (head == NULL)
|
---|
1326 | return NULL;
|
---|
1327 |
|
---|
1328 | if (head->left != NULL) {
|
---|
1329 | dotnode = scantree(head->left);
|
---|
1330 | if (dotnode)
|
---|
1331 | return dotnode;
|
---|
1332 | }
|
---|
1333 |
|
---|
1334 | if (head->right != NULL) {
|
---|
1335 | dotnode = scantree(head->right);
|
---|
1336 | if (dotnode)
|
---|
1337 | return dotnode;
|
---|
1338 | }
|
---|
1339 |
|
---|
1340 | if (head->words == NULL)
|
---|
1341 | return NULL;
|
---|
1342 |
|
---|
1343 | DBGPRINTF5(("SCANTREE: checking node %p\n", head));
|
---|
1344 |
|
---|
1345 | if ((head->type != TDOT) && LONE_CHAR(head->words[0], '.')) {
|
---|
1346 | DBGPRINTF5(("SCANTREE: dot found in node %p\n", head));
|
---|
1347 | return head;
|
---|
1348 | }
|
---|
1349 |
|
---|
1350 | return NULL;
|
---|
1351 | }
|
---|
1352 |
|
---|
1353 |
|
---|
1354 | static void onecommand(void)
|
---|
1355 | {
|
---|
1356 | int i;
|
---|
1357 | jmp_buf m1;
|
---|
1358 |
|
---|
1359 | DBGPRINTF(("ONECOMMAND: enter, outtree=%p\n", outtree));
|
---|
1360 |
|
---|
1361 | while (e.oenv)
|
---|
1362 | quitenv();
|
---|
1363 |
|
---|
1364 | areanum = 1;
|
---|
1365 | freehere(areanum);
|
---|
1366 | freearea(areanum);
|
---|
1367 | garbage();
|
---|
1368 | wdlist = 0;
|
---|
1369 | iolist = 0;
|
---|
1370 | e.errpt = 0;
|
---|
1371 | e.linep = line;
|
---|
1372 | yynerrs = 0;
|
---|
1373 | multiline = 0;
|
---|
1374 | inparse = 1;
|
---|
1375 | intr = 0;
|
---|
1376 | execflg = 0;
|
---|
1377 |
|
---|
1378 | failpt = m1;
|
---|
1379 | setjmp(failpt); /* Bruce Evans' fix */
|
---|
1380 | failpt = m1;
|
---|
1381 | if (setjmp(failpt) || yyparse() || intr) {
|
---|
1382 | DBGPRINTF(("ONECOMMAND: this is not good.\n"));
|
---|
1383 |
|
---|
1384 | while (e.oenv)
|
---|
1385 | quitenv();
|
---|
1386 | scraphere();
|
---|
1387 | if (!interactive && intr)
|
---|
1388 | leave();
|
---|
1389 | inparse = 0;
|
---|
1390 | intr = 0;
|
---|
1391 | return;
|
---|
1392 | }
|
---|
1393 |
|
---|
1394 | inparse = 0;
|
---|
1395 | brklist = 0;
|
---|
1396 | intr = 0;
|
---|
1397 | execflg = 0;
|
---|
1398 |
|
---|
1399 | if (!FLAG['n']) {
|
---|
1400 | DBGPRINTF(("ONECOMMAND: calling execute, t=outtree=%p\n",
|
---|
1401 | outtree));
|
---|
1402 | execute(outtree, NOPIPE, NOPIPE, 0);
|
---|
1403 | }
|
---|
1404 |
|
---|
1405 | if (!interactive && intr) {
|
---|
1406 | execflg = 0;
|
---|
1407 | leave();
|
---|
1408 | }
|
---|
1409 |
|
---|
1410 | i = trapset;
|
---|
1411 | if (i != 0) {
|
---|
1412 | trapset = 0;
|
---|
1413 | runtrap(i);
|
---|
1414 | }
|
---|
1415 | }
|
---|
1416 |
|
---|
1417 | static int newenv(int f)
|
---|
1418 | {
|
---|
1419 | struct env *ep;
|
---|
1420 |
|
---|
1421 | DBGPRINTF(("NEWENV: f=%d (indicates quitenv and return)\n", f));
|
---|
1422 |
|
---|
1423 | if (f) {
|
---|
1424 | quitenv();
|
---|
1425 | return 1;
|
---|
1426 | }
|
---|
1427 |
|
---|
1428 | ep = (struct env *) space(sizeof(*ep));
|
---|
1429 | if (ep == NULL) {
|
---|
1430 | while (e.oenv)
|
---|
1431 | quitenv();
|
---|
1432 | fail();
|
---|
1433 | }
|
---|
1434 | *ep = e;
|
---|
1435 | e.oenv = ep;
|
---|
1436 | e.errpt = errpt;
|
---|
1437 |
|
---|
1438 | return 0;
|
---|
1439 | }
|
---|
1440 |
|
---|
1441 | static void quitenv(void)
|
---|
1442 | {
|
---|
1443 | struct env *ep;
|
---|
1444 | int fd;
|
---|
1445 |
|
---|
1446 | DBGPRINTF(("QUITENV: e.oenv=%p\n", e.oenv));
|
---|
1447 |
|
---|
1448 | ep = e.oenv;
|
---|
1449 | if (ep != NULL) {
|
---|
1450 | fd = e.iofd;
|
---|
1451 | e = *ep;
|
---|
1452 | /* should close `'d files */
|
---|
1453 | DELETE(ep);
|
---|
1454 | while (--fd >= e.iofd)
|
---|
1455 | close(fd);
|
---|
1456 | }
|
---|
1457 | }
|
---|
1458 |
|
---|
1459 | /*
|
---|
1460 | * Is character c in s?
|
---|
1461 | */
|
---|
1462 | static int any(int c, const char *s)
|
---|
1463 | {
|
---|
1464 | while (*s)
|
---|
1465 | if (*s++ == c)
|
---|
1466 | return 1;
|
---|
1467 | return 0;
|
---|
1468 | }
|
---|
1469 |
|
---|
1470 | /*
|
---|
1471 | * Is any character from s1 in s2?
|
---|
1472 | */
|
---|
1473 | static int anys(const char *s1, const char *s2)
|
---|
1474 | {
|
---|
1475 | while (*s1)
|
---|
1476 | if (any(*s1++, s2))
|
---|
1477 | return 1;
|
---|
1478 | return 0;
|
---|
1479 | }
|
---|
1480 |
|
---|
1481 | static char *putn(int n)
|
---|
1482 | {
|
---|
1483 | return itoa(n);
|
---|
1484 | }
|
---|
1485 |
|
---|
1486 | static void next(int f)
|
---|
1487 | {
|
---|
1488 | PUSHIO(afile, f, filechar);
|
---|
1489 | }
|
---|
1490 |
|
---|
1491 | static void onintr(int s) /* ANSI C requires a parameter */
|
---|
1492 | {
|
---|
1493 | signal(SIGINT, onintr);
|
---|
1494 | intr = 1;
|
---|
1495 | if (interactive) {
|
---|
1496 | if (inparse) {
|
---|
1497 | prs("\n");
|
---|
1498 | fail();
|
---|
1499 | }
|
---|
1500 | } else if (heedint) {
|
---|
1501 | execflg = 0;
|
---|
1502 | leave();
|
---|
1503 | }
|
---|
1504 | }
|
---|
1505 |
|
---|
1506 |
|
---|
1507 | /* -------- gmatch.c -------- */
|
---|
1508 | /*
|
---|
1509 | * int gmatch(string, pattern)
|
---|
1510 | * char *string, *pattern;
|
---|
1511 | *
|
---|
1512 | * Match a pattern as in sh(1).
|
---|
1513 | */
|
---|
1514 |
|
---|
1515 | #define CMASK 0377
|
---|
1516 | #define QUOTE 0200
|
---|
1517 | #define QMASK (CMASK & ~QUOTE)
|
---|
1518 | #define NOT '!' /* might use ^ */
|
---|
1519 |
|
---|
1520 | static const char *cclass(const char *p, int sub)
|
---|
1521 | {
|
---|
1522 | int c, d, not, found;
|
---|
1523 |
|
---|
1524 | not = (*p == NOT);
|
---|
1525 | if (not != 0)
|
---|
1526 | p++;
|
---|
1527 | found = not;
|
---|
1528 | do {
|
---|
1529 | if (*p == '\0')
|
---|
1530 | return NULL;
|
---|
1531 | c = *p & CMASK;
|
---|
1532 | if (p[1] == '-' && p[2] != ']') {
|
---|
1533 | d = p[2] & CMASK;
|
---|
1534 | p++;
|
---|
1535 | } else
|
---|
1536 | d = c;
|
---|
1537 | if (c == sub || (c <= sub && sub <= d))
|
---|
1538 | found = !not;
|
---|
1539 | } while (*++p != ']');
|
---|
1540 | return found ? p + 1 : NULL;
|
---|
1541 | }
|
---|
1542 |
|
---|
1543 | static int gmatch(const char *s, const char *p)
|
---|
1544 | {
|
---|
1545 | int sc, pc;
|
---|
1546 |
|
---|
1547 | if (s == NULL || p == NULL)
|
---|
1548 | return 0;
|
---|
1549 |
|
---|
1550 | while ((pc = *p++ & CMASK) != '\0') {
|
---|
1551 | sc = *s++ & QMASK;
|
---|
1552 | switch (pc) {
|
---|
1553 | case '[':
|
---|
1554 | p = cclass(p, sc);
|
---|
1555 | if (p == NULL)
|
---|
1556 | return 0;
|
---|
1557 | break;
|
---|
1558 |
|
---|
1559 | case '?':
|
---|
1560 | if (sc == 0)
|
---|
1561 | return 0;
|
---|
1562 | break;
|
---|
1563 |
|
---|
1564 | case '*':
|
---|
1565 | s--;
|
---|
1566 | do {
|
---|
1567 | if (*p == '\0' || gmatch(s, p))
|
---|
1568 | return 1;
|
---|
1569 | } while (*s++ != '\0');
|
---|
1570 | return 0;
|
---|
1571 |
|
---|
1572 | default:
|
---|
1573 | if (sc != (pc & ~QUOTE))
|
---|
1574 | return 0;
|
---|
1575 | }
|
---|
1576 | }
|
---|
1577 | return *s == '\0';
|
---|
1578 | }
|
---|
1579 |
|
---|
1580 |
|
---|
1581 | /* -------- csyn.c -------- */
|
---|
1582 | /*
|
---|
1583 | * shell: syntax (C version)
|
---|
1584 | */
|
---|
1585 |
|
---|
1586 | static void yyerror(const char *s) ATTRIBUTE_NORETURN;
|
---|
1587 | static void yyerror(const char *s)
|
---|
1588 | {
|
---|
1589 | yynerrs++;
|
---|
1590 | if (interactive && e.iop <= iostack) {
|
---|
1591 | multiline = 0;
|
---|
1592 | while (eofc() == 0 && yylex(0) != '\n');
|
---|
1593 | }
|
---|
1594 | err(s);
|
---|
1595 | fail();
|
---|
1596 | }
|
---|
1597 |
|
---|
1598 | static void zzerr(void) ATTRIBUTE_NORETURN;
|
---|
1599 | static void zzerr(void)
|
---|
1600 | {
|
---|
1601 | yyerror("syntax error");
|
---|
1602 | }
|
---|
1603 |
|
---|
1604 | int yyparse(void)
|
---|
1605 | {
|
---|
1606 | DBGPRINTF7(("YYPARSE: enter...\n"));
|
---|
1607 |
|
---|
1608 | startl = 1;
|
---|
1609 | peeksym = 0;
|
---|
1610 | yynerrs = 0;
|
---|
1611 | outtree = c_list();
|
---|
1612 | musthave('\n', 0);
|
---|
1613 | return (yynerrs != 0);
|
---|
1614 | }
|
---|
1615 |
|
---|
1616 | static struct op *pipeline(int cf)
|
---|
1617 | {
|
---|
1618 | struct op *t, *p;
|
---|
1619 | int c;
|
---|
1620 |
|
---|
1621 | DBGPRINTF7(("PIPELINE: enter, cf=%d\n", cf));
|
---|
1622 |
|
---|
1623 | t = command(cf);
|
---|
1624 |
|
---|
1625 | DBGPRINTF9(("PIPELINE: t=%p\n", t));
|
---|
1626 |
|
---|
1627 | if (t != NULL) {
|
---|
1628 | while ((c = yylex(0)) == '|') {
|
---|
1629 | p = command(CONTIN);
|
---|
1630 | if (p == NULL) {
|
---|
1631 | DBGPRINTF8(("PIPELINE: error!\n"));
|
---|
1632 | zzerr();
|
---|
1633 | }
|
---|
1634 |
|
---|
1635 | if (t->type != TPAREN && t->type != TCOM) {
|
---|
1636 | /* shell statement */
|
---|
1637 | t = block(TPAREN, t, NOBLOCK, NOWORDS);
|
---|
1638 | }
|
---|
1639 |
|
---|
1640 | t = block(TPIPE, t, p, NOWORDS);
|
---|
1641 | }
|
---|
1642 | peeksym = c;
|
---|
1643 | }
|
---|
1644 |
|
---|
1645 | DBGPRINTF7(("PIPELINE: returning t=%p\n", t));
|
---|
1646 | return t;
|
---|
1647 | }
|
---|
1648 |
|
---|
1649 | static struct op *andor(void)
|
---|
1650 | {
|
---|
1651 | struct op *t, *p;
|
---|
1652 | int c;
|
---|
1653 |
|
---|
1654 | DBGPRINTF7(("ANDOR: enter...\n"));
|
---|
1655 |
|
---|
1656 | t = pipeline(0);
|
---|
1657 |
|
---|
1658 | DBGPRINTF9(("ANDOR: t=%p\n", t));
|
---|
1659 |
|
---|
1660 | if (t != NULL) {
|
---|
1661 | while ((c = yylex(0)) == LOGAND || c == LOGOR) {
|
---|
1662 | p = pipeline(CONTIN);
|
---|
1663 | if (p == NULL) {
|
---|
1664 | DBGPRINTF8(("ANDOR: error!\n"));
|
---|
1665 | zzerr();
|
---|
1666 | }
|
---|
1667 |
|
---|
1668 | t = block(c == LOGAND ? TAND : TOR, t, p, NOWORDS);
|
---|
1669 | } /* WHILE */
|
---|
1670 |
|
---|
1671 | peeksym = c;
|
---|
1672 | }
|
---|
1673 |
|
---|
1674 | DBGPRINTF7(("ANDOR: returning t=%p\n", t));
|
---|
1675 | return t;
|
---|
1676 | }
|
---|
1677 |
|
---|
1678 | static struct op *c_list(void)
|
---|
1679 | {
|
---|
1680 | struct op *t, *p;
|
---|
1681 | int c;
|
---|
1682 |
|
---|
1683 | DBGPRINTF7(("C_LIST: enter...\n"));
|
---|
1684 |
|
---|
1685 | t = andor();
|
---|
1686 |
|
---|
1687 | if (t != NULL) {
|
---|
1688 | peeksym = yylex(0);
|
---|
1689 | if (peeksym == '&')
|
---|
1690 | t = block(TASYNC, t, NOBLOCK, NOWORDS);
|
---|
1691 |
|
---|
1692 | while ((c = yylex(0)) == ';' || c == '&'
|
---|
1693 | || (multiline && c == '\n')) {
|
---|
1694 |
|
---|
1695 | p = andor();
|
---|
1696 | if (p== NULL)
|
---|
1697 | return t;
|
---|
1698 |
|
---|
1699 | peeksym = yylex(0);
|
---|
1700 | if (peeksym == '&')
|
---|
1701 | p = block(TASYNC, p, NOBLOCK, NOWORDS);
|
---|
1702 |
|
---|
1703 | t = list(t, p);
|
---|
1704 | } /* WHILE */
|
---|
1705 |
|
---|
1706 | peeksym = c;
|
---|
1707 | }
|
---|
1708 | /* IF */
|
---|
1709 | DBGPRINTF7(("C_LIST: returning t=%p\n", t));
|
---|
1710 | return t;
|
---|
1711 | }
|
---|
1712 |
|
---|
1713 | static int synio(int cf)
|
---|
1714 | {
|
---|
1715 | struct ioword *iop;
|
---|
1716 | int i;
|
---|
1717 | int c;
|
---|
1718 |
|
---|
1719 | DBGPRINTF7(("SYNIO: enter, cf=%d\n", cf));
|
---|
1720 |
|
---|
1721 | c = yylex(cf);
|
---|
1722 | if (c != '<' && c != '>') {
|
---|
1723 | peeksym = c;
|
---|
1724 | return 0;
|
---|
1725 | }
|
---|
1726 |
|
---|
1727 | i = yylval.i;
|
---|
1728 | musthave(WORD, 0);
|
---|
1729 | iop = io(iounit, i, yylval.cp);
|
---|
1730 | iounit = IODEFAULT;
|
---|
1731 |
|
---|
1732 | if (i & IOHERE)
|
---|
1733 | markhere(yylval.cp, iop);
|
---|
1734 |
|
---|
1735 | DBGPRINTF7(("SYNIO: returning 1\n"));
|
---|
1736 | return 1;
|
---|
1737 | }
|
---|
1738 |
|
---|
1739 | static void musthave(int c, int cf)
|
---|
1740 | {
|
---|
1741 | peeksym = yylex(cf);
|
---|
1742 | if (peeksym != c) {
|
---|
1743 | DBGPRINTF7(("MUSTHAVE: error!\n"));
|
---|
1744 | zzerr();
|
---|
1745 | }
|
---|
1746 |
|
---|
1747 | peeksym = 0;
|
---|
1748 | }
|
---|
1749 |
|
---|
1750 | static struct op *simple(void)
|
---|
1751 | {
|
---|
1752 | struct op *t;
|
---|
1753 |
|
---|
1754 | t = NULL;
|
---|
1755 | for (;;) {
|
---|
1756 | switch (peeksym = yylex(0)) {
|
---|
1757 | case '<':
|
---|
1758 | case '>':
|
---|
1759 | (void) synio(0);
|
---|
1760 | break;
|
---|
1761 |
|
---|
1762 | case WORD:
|
---|
1763 | if (t == NULL) {
|
---|
1764 | t = newtp();
|
---|
1765 | t->type = TCOM;
|
---|
1766 | }
|
---|
1767 | peeksym = 0;
|
---|
1768 | word(yylval.cp);
|
---|
1769 | break;
|
---|
1770 |
|
---|
1771 | default:
|
---|
1772 | return t;
|
---|
1773 | }
|
---|
1774 | }
|
---|
1775 | }
|
---|
1776 |
|
---|
1777 | static struct op *nested(int type, int mark)
|
---|
1778 | {
|
---|
1779 | struct op *t;
|
---|
1780 |
|
---|
1781 | DBGPRINTF3(("NESTED: enter, type=%d, mark=%d\n", type, mark));
|
---|
1782 |
|
---|
1783 | multiline++;
|
---|
1784 | t = c_list();
|
---|
1785 | musthave(mark, 0);
|
---|
1786 | multiline--;
|
---|
1787 | return block(type, t, NOBLOCK, NOWORDS);
|
---|
1788 | }
|
---|
1789 |
|
---|
1790 | static struct op *command(int cf)
|
---|
1791 | {
|
---|
1792 | struct op *t;
|
---|
1793 | struct wdblock *iosave;
|
---|
1794 | int c;
|
---|
1795 |
|
---|
1796 | DBGPRINTF(("COMMAND: enter, cf=%d\n", cf));
|
---|
1797 |
|
---|
1798 | iosave = iolist;
|
---|
1799 | iolist = NULL;
|
---|
1800 |
|
---|
1801 | if (multiline)
|
---|
1802 | cf |= CONTIN;
|
---|
1803 |
|
---|
1804 | while (synio(cf))
|
---|
1805 | cf = 0;
|
---|
1806 |
|
---|
1807 | c = yylex(cf);
|
---|
1808 |
|
---|
1809 | switch (c) {
|
---|
1810 | default:
|
---|
1811 | peeksym = c;
|
---|
1812 | t = simple();
|
---|
1813 | if (t == NULL) {
|
---|
1814 | if (iolist == NULL)
|
---|
1815 | return NULL;
|
---|
1816 | t = newtp();
|
---|
1817 | t->type = TCOM;
|
---|
1818 | }
|
---|
1819 | break;
|
---|
1820 |
|
---|
1821 | case '(':
|
---|
1822 | t = nested(TPAREN, ')');
|
---|
1823 | break;
|
---|
1824 |
|
---|
1825 | case '{':
|
---|
1826 | t = nested(TBRACE, '}');
|
---|
1827 | break;
|
---|
1828 |
|
---|
1829 | case FOR:
|
---|
1830 | t = newtp();
|
---|
1831 | t->type = TFOR;
|
---|
1832 | musthave(WORD, 0);
|
---|
1833 | startl = 1;
|
---|
1834 | t->str = yylval.cp;
|
---|
1835 | multiline++;
|
---|
1836 | t->words = wordlist();
|
---|
1837 | c = yylex(0);
|
---|
1838 | if (c != '\n' && c != ';')
|
---|
1839 | peeksym = c;
|
---|
1840 | t->left = dogroup(0);
|
---|
1841 | multiline--;
|
---|
1842 | break;
|
---|
1843 |
|
---|
1844 | case WHILE:
|
---|
1845 | case UNTIL:
|
---|
1846 | multiline++;
|
---|
1847 | t = newtp();
|
---|
1848 | t->type = c == WHILE ? TWHILE : TUNTIL;
|
---|
1849 | t->left = c_list();
|
---|
1850 | t->right = dogroup(1);
|
---|
1851 | t->words = NULL;
|
---|
1852 | multiline--;
|
---|
1853 | break;
|
---|
1854 |
|
---|
1855 | case CASE:
|
---|
1856 | t = newtp();
|
---|
1857 | t->type = TCASE;
|
---|
1858 | musthave(WORD, 0);
|
---|
1859 | t->str = yylval.cp;
|
---|
1860 | startl++;
|
---|
1861 | multiline++;
|
---|
1862 | musthave(IN, CONTIN);
|
---|
1863 | startl++;
|
---|
1864 |
|
---|
1865 | t->left = caselist();
|
---|
1866 |
|
---|
1867 | musthave(ESAC, 0);
|
---|
1868 | multiline--;
|
---|
1869 | break;
|
---|
1870 |
|
---|
1871 | case IF:
|
---|
1872 | multiline++;
|
---|
1873 | t = newtp();
|
---|
1874 | t->type = TIF;
|
---|
1875 | t->left = c_list();
|
---|
1876 | t->right = thenpart();
|
---|
1877 | musthave(FI, 0);
|
---|
1878 | multiline--;
|
---|
1879 | break;
|
---|
1880 |
|
---|
1881 | case DOT:
|
---|
1882 | t = newtp();
|
---|
1883 | t->type = TDOT;
|
---|
1884 |
|
---|
1885 | musthave(WORD, 0); /* gets name of file */
|
---|
1886 | DBGPRINTF7(("COMMAND: DOT clause, yylval.cp is %s\n", yylval.cp));
|
---|
1887 |
|
---|
1888 | word(yylval.cp); /* add word to wdlist */
|
---|
1889 | word(NOWORD); /* terminate wdlist */
|
---|
1890 | t->words = copyw(); /* dup wdlist */
|
---|
1891 | break;
|
---|
1892 |
|
---|
1893 | }
|
---|
1894 |
|
---|
1895 | while (synio(0));
|
---|
1896 |
|
---|
1897 | t = namelist(t);
|
---|
1898 | iolist = iosave;
|
---|
1899 |
|
---|
1900 | DBGPRINTF(("COMMAND: returning %p\n", t));
|
---|
1901 |
|
---|
1902 | return t;
|
---|
1903 | }
|
---|
1904 |
|
---|
1905 | static struct op *dowholefile(int type, int mark)
|
---|
1906 | {
|
---|
1907 | struct op *t;
|
---|
1908 |
|
---|
1909 | DBGPRINTF(("DOWHOLEFILE: enter, type=%d, mark=%d\n", type, mark));
|
---|
1910 |
|
---|
1911 | multiline++;
|
---|
1912 | t = c_list();
|
---|
1913 | multiline--;
|
---|
1914 | t = block(type, t, NOBLOCK, NOWORDS);
|
---|
1915 | DBGPRINTF(("DOWHOLEFILE: return t=%p\n", t));
|
---|
1916 | return t;
|
---|
1917 | }
|
---|
1918 |
|
---|
1919 | static struct op *dogroup(int onlydone)
|
---|
1920 | {
|
---|
1921 | int c;
|
---|
1922 | struct op *mylist;
|
---|
1923 |
|
---|
1924 | c = yylex(CONTIN);
|
---|
1925 | if (c == DONE && onlydone)
|
---|
1926 | return NULL;
|
---|
1927 | if (c != DO)
|
---|
1928 | zzerr();
|
---|
1929 | mylist = c_list();
|
---|
1930 | musthave(DONE, 0);
|
---|
1931 | return mylist;
|
---|
1932 | }
|
---|
1933 |
|
---|
1934 | static struct op *thenpart(void)
|
---|
1935 | {
|
---|
1936 | int c;
|
---|
1937 | struct op *t;
|
---|
1938 |
|
---|
1939 | c = yylex(0);
|
---|
1940 | if (c != THEN) {
|
---|
1941 | peeksym = c;
|
---|
1942 | return NULL;
|
---|
1943 | }
|
---|
1944 | t = newtp();
|
---|
1945 | t->type = 0;
|
---|
1946 | t->left = c_list();
|
---|
1947 | if (t->left == NULL)
|
---|
1948 | zzerr();
|
---|
1949 | t->right = elsepart();
|
---|
1950 | return t;
|
---|
1951 | }
|
---|
1952 |
|
---|
1953 | static struct op *elsepart(void)
|
---|
1954 | {
|
---|
1955 | int c;
|
---|
1956 | struct op *t;
|
---|
1957 |
|
---|
1958 | switch (c = yylex(0)) {
|
---|
1959 | case ELSE:
|
---|
1960 | t = c_list();
|
---|
1961 | if (t == NULL)
|
---|
1962 | zzerr();
|
---|
1963 | return t;
|
---|
1964 |
|
---|
1965 | case ELIF:
|
---|
1966 | t = newtp();
|
---|
1967 | t->type = TELIF;
|
---|
1968 | t->left = c_list();
|
---|
1969 | t->right = thenpart();
|
---|
1970 | return t;
|
---|
1971 |
|
---|
1972 | default:
|
---|
1973 | peeksym = c;
|
---|
1974 | return NULL;
|
---|
1975 | }
|
---|
1976 | }
|
---|
1977 |
|
---|
1978 | static struct op *caselist(void)
|
---|
1979 | {
|
---|
1980 | struct op *t;
|
---|
1981 |
|
---|
1982 | t = NULL;
|
---|
1983 | while ((peeksym = yylex(CONTIN)) != ESAC) {
|
---|
1984 | DBGPRINTF(("CASELIST, doing yylex, peeksym=%d\n", peeksym));
|
---|
1985 | t = list(t, casepart());
|
---|
1986 | }
|
---|
1987 |
|
---|
1988 | DBGPRINTF(("CASELIST, returning t=%p\n", t));
|
---|
1989 | return t;
|
---|
1990 | }
|
---|
1991 |
|
---|
1992 | static struct op *casepart(void)
|
---|
1993 | {
|
---|
1994 | struct op *t;
|
---|
1995 |
|
---|
1996 | DBGPRINTF7(("CASEPART: enter...\n"));
|
---|
1997 |
|
---|
1998 | t = newtp();
|
---|
1999 | t->type = TPAT;
|
---|
2000 | t->words = pattern();
|
---|
2001 | musthave(')', 0);
|
---|
2002 | t->left = c_list();
|
---|
2003 | peeksym = yylex(CONTIN);
|
---|
2004 | if (peeksym != ESAC)
|
---|
2005 | musthave(BREAK, CONTIN);
|
---|
2006 |
|
---|
2007 | DBGPRINTF7(("CASEPART: made newtp(TPAT, t=%p)\n", t));
|
---|
2008 |
|
---|
2009 | return t;
|
---|
2010 | }
|
---|
2011 |
|
---|
2012 | static char **pattern(void)
|
---|
2013 | {
|
---|
2014 | int c, cf;
|
---|
2015 |
|
---|
2016 | cf = CONTIN;
|
---|
2017 | do {
|
---|
2018 | musthave(WORD, cf);
|
---|
2019 | word(yylval.cp);
|
---|
2020 | cf = 0;
|
---|
2021 | c = yylex(0);
|
---|
2022 | } while (c == '|');
|
---|
2023 | peeksym = c;
|
---|
2024 | word(NOWORD);
|
---|
2025 |
|
---|
2026 | return copyw();
|
---|
2027 | }
|
---|
2028 |
|
---|
2029 | static char **wordlist(void)
|
---|
2030 | {
|
---|
2031 | int c;
|
---|
2032 |
|
---|
2033 | c = yylex(0);
|
---|
2034 | if (c != IN) {
|
---|
2035 | peeksym = c;
|
---|
2036 | return NULL;
|
---|
2037 | }
|
---|
2038 | startl = 0;
|
---|
2039 | while ((c = yylex(0)) == WORD)
|
---|
2040 | word(yylval.cp);
|
---|
2041 | word(NOWORD);
|
---|
2042 | peeksym = c;
|
---|
2043 | return copyw();
|
---|
2044 | }
|
---|
2045 |
|
---|
2046 | /*
|
---|
2047 | * supporting functions
|
---|
2048 | */
|
---|
2049 | static struct op *list(struct op *t1, struct op *t2)
|
---|
2050 | {
|
---|
2051 | DBGPRINTF7(("LIST: enter, t1=%p, t2=%p\n", t1, t2));
|
---|
2052 |
|
---|
2053 | if (t1 == NULL)
|
---|
2054 | return t2;
|
---|
2055 | if (t2 == NULL)
|
---|
2056 | return t1;
|
---|
2057 |
|
---|
2058 | return block(TLIST, t1, t2, NOWORDS);
|
---|
2059 | }
|
---|
2060 |
|
---|
2061 | static struct op *block(int type, struct op *t1, struct op *t2, char **wp)
|
---|
2062 | {
|
---|
2063 | struct op *t;
|
---|
2064 |
|
---|
2065 | DBGPRINTF7(("BLOCK: enter, type=%d (%s)\n", type, T_CMD_NAMES[type]));
|
---|
2066 |
|
---|
2067 | t = newtp();
|
---|
2068 | t->type = type;
|
---|
2069 | t->left = t1;
|
---|
2070 | t->right = t2;
|
---|
2071 | t->words = wp;
|
---|
2072 |
|
---|
2073 | DBGPRINTF7(("BLOCK: inserted %p between %p and %p\n", t, t1,
|
---|
2074 | t2));
|
---|
2075 |
|
---|
2076 | return t;
|
---|
2077 | }
|
---|
2078 |
|
---|
2079 | /* See if given string is a shell multiline (FOR, IF, etc) */
|
---|
2080 | static int rlookup(char *n)
|
---|
2081 | {
|
---|
2082 | const struct res *rp;
|
---|
2083 |
|
---|
2084 | DBGPRINTF7(("RLOOKUP: enter, n is %s\n", n));
|
---|
2085 |
|
---|
2086 | for (rp = restab; rp->r_name; rp++)
|
---|
2087 | if (strcmp(rp->r_name, n) == 0) {
|
---|
2088 | DBGPRINTF7(("RLOOKUP: match, returning %d\n", rp->r_val));
|
---|
2089 | return rp->r_val; /* Return numeric code for shell multiline */
|
---|
2090 | }
|
---|
2091 |
|
---|
2092 | DBGPRINTF7(("RLOOKUP: NO match, returning 0\n"));
|
---|
2093 | return 0; /* Not a shell multiline */
|
---|
2094 | }
|
---|
2095 |
|
---|
2096 | static struct op *newtp(void)
|
---|
2097 | {
|
---|
2098 | struct op *t;
|
---|
2099 |
|
---|
2100 | t = (struct op *) tree(sizeof(*t));
|
---|
2101 | t->type = 0;
|
---|
2102 | t->words = NULL;
|
---|
2103 | t->ioact = NULL;
|
---|
2104 | t->left = NULL;
|
---|
2105 | t->right = NULL;
|
---|
2106 | t->str = NULL;
|
---|
2107 |
|
---|
2108 | DBGPRINTF3(("NEWTP: allocated %p\n", t));
|
---|
2109 |
|
---|
2110 | return t;
|
---|
2111 | }
|
---|
2112 |
|
---|
2113 | static struct op *namelist(struct op *t)
|
---|
2114 | {
|
---|
2115 | DBGPRINTF7(("NAMELIST: enter, t=%p, type %s, iolist=%p\n", t,
|
---|
2116 | T_CMD_NAMES[t->type], iolist));
|
---|
2117 |
|
---|
2118 | if (iolist) {
|
---|
2119 | iolist = addword((char *) NULL, iolist);
|
---|
2120 | t->ioact = copyio();
|
---|
2121 | } else
|
---|
2122 | t->ioact = NULL;
|
---|
2123 |
|
---|
2124 | if (t->type != TCOM) {
|
---|
2125 | if (t->type != TPAREN && t->ioact != NULL) {
|
---|
2126 | t = block(TPAREN, t, NOBLOCK, NOWORDS);
|
---|
2127 | t->ioact = t->left->ioact;
|
---|
2128 | t->left->ioact = NULL;
|
---|
2129 | }
|
---|
2130 | return t;
|
---|
2131 | }
|
---|
2132 |
|
---|
2133 | word(NOWORD);
|
---|
2134 | t->words = copyw();
|
---|
2135 |
|
---|
2136 | return t;
|
---|
2137 | }
|
---|
2138 |
|
---|
2139 | static char **copyw(void)
|
---|
2140 | {
|
---|
2141 | char **wd;
|
---|
2142 |
|
---|
2143 | wd = getwords(wdlist);
|
---|
2144 | wdlist = 0;
|
---|
2145 | return wd;
|
---|
2146 | }
|
---|
2147 |
|
---|
2148 | static void word(char *cp)
|
---|
2149 | {
|
---|
2150 | wdlist = addword(cp, wdlist);
|
---|
2151 | }
|
---|
2152 |
|
---|
2153 | static struct ioword **copyio(void)
|
---|
2154 | {
|
---|
2155 | struct ioword **iop;
|
---|
2156 |
|
---|
2157 | iop = (struct ioword **) getwords(iolist);
|
---|
2158 | iolist = 0;
|
---|
2159 | return iop;
|
---|
2160 | }
|
---|
2161 |
|
---|
2162 | static struct ioword *io(int u, int f, char *cp)
|
---|
2163 | {
|
---|
2164 | struct ioword *iop;
|
---|
2165 |
|
---|
2166 | iop = (struct ioword *) tree(sizeof(*iop));
|
---|
2167 | iop->io_unit = u;
|
---|
2168 | iop->io_flag = f;
|
---|
2169 | iop->io_name = cp;
|
---|
2170 | iolist = addword((char *) iop, iolist);
|
---|
2171 | return iop;
|
---|
2172 | }
|
---|
2173 |
|
---|
2174 | static int yylex(int cf)
|
---|
2175 | {
|
---|
2176 | int c, c1;
|
---|
2177 | int atstart;
|
---|
2178 |
|
---|
2179 | c = peeksym;
|
---|
2180 | if (c > 0) {
|
---|
2181 | peeksym = 0;
|
---|
2182 | if (c == '\n')
|
---|
2183 | startl = 1;
|
---|
2184 | return c;
|
---|
2185 | }
|
---|
2186 |
|
---|
2187 | nlseen = 0;
|
---|
2188 | atstart = startl;
|
---|
2189 | startl = 0;
|
---|
2190 | yylval.i = 0;
|
---|
2191 | e.linep = line;
|
---|
2192 |
|
---|
2193 | /* MALAMO */
|
---|
2194 | line[LINELIM - 1] = '\0';
|
---|
2195 |
|
---|
2196 | loop:
|
---|
2197 | while ((c = my_getc(0)) == ' ' || c == '\t') /* Skip whitespace */
|
---|
2198 | ;
|
---|
2199 |
|
---|
2200 | switch (c) {
|
---|
2201 | default:
|
---|
2202 | if (any(c, "0123456789")) {
|
---|
2203 | c1 = my_getc(0);
|
---|
2204 | unget(c1);
|
---|
2205 | if (c1 == '<' || c1 == '>') {
|
---|
2206 | iounit = c - '0';
|
---|
2207 | goto loop;
|
---|
2208 | }
|
---|
2209 | *e.linep++ = c;
|
---|
2210 | c = c1;
|
---|
2211 | }
|
---|
2212 | break;
|
---|
2213 |
|
---|
2214 | case '#': /* Comment, skip to next newline or End-of-string */
|
---|
2215 | while ((c = my_getc(0)) != '\0' && c != '\n');
|
---|
2216 | unget(c);
|
---|
2217 | goto loop;
|
---|
2218 |
|
---|
2219 | case 0:
|
---|
2220 | DBGPRINTF5(("YYLEX: return 0, c=%d\n", c));
|
---|
2221 | return c;
|
---|
2222 |
|
---|
2223 | case '$':
|
---|
2224 | DBGPRINTF9(("YYLEX: found $\n"));
|
---|
2225 | *e.linep++ = c;
|
---|
2226 | c = my_getc(0);
|
---|
2227 | if (c == '{') {
|
---|
2228 | c = collect(c, '}');
|
---|
2229 | if (c != '\0')
|
---|
2230 | return c;
|
---|
2231 | goto pack;
|
---|
2232 | }
|
---|
2233 | break;
|
---|
2234 |
|
---|
2235 | case '`':
|
---|
2236 | case '\'':
|
---|
2237 | case '"':
|
---|
2238 | c = collect(c, c);
|
---|
2239 | if (c != '\0')
|
---|
2240 | return c;
|
---|
2241 | goto pack;
|
---|
2242 |
|
---|
2243 | case '|':
|
---|
2244 | case '&':
|
---|
2245 | case ';':
|
---|
2246 | startl = 1;
|
---|
2247 | /* If more chars process them, else return NULL char */
|
---|
2248 | c1 = dual(c);
|
---|
2249 | if (c1 != '\0')
|
---|
2250 | return c1;
|
---|
2251 | return c;
|
---|
2252 |
|
---|
2253 | case '^':
|
---|
2254 | startl = 1;
|
---|
2255 | return '|';
|
---|
2256 | case '>':
|
---|
2257 | case '<':
|
---|
2258 | diag(c);
|
---|
2259 | return c;
|
---|
2260 |
|
---|
2261 | case '\n':
|
---|
2262 | nlseen++;
|
---|
2263 | gethere();
|
---|
2264 | startl = 1;
|
---|
2265 | if (multiline || cf & CONTIN) {
|
---|
2266 | if (interactive && e.iop <= iostack) {
|
---|
2267 | #if ENABLE_FEATURE_EDITING
|
---|
2268 | current_prompt = cprompt->value;
|
---|
2269 | #else
|
---|
2270 | prs(cprompt->value);
|
---|
2271 | #endif
|
---|
2272 | }
|
---|
2273 | if (cf & CONTIN)
|
---|
2274 | goto loop;
|
---|
2275 | }
|
---|
2276 | return c;
|
---|
2277 |
|
---|
2278 | case '(':
|
---|
2279 | case ')':
|
---|
2280 | startl = 1;
|
---|
2281 | return c;
|
---|
2282 | }
|
---|
2283 |
|
---|
2284 | unget(c);
|
---|
2285 |
|
---|
2286 | pack:
|
---|
2287 | while ((c = my_getc(0)) != '\0' && !any(c, "`$ '\"\t;&<>()|^\n")) {
|
---|
2288 | if (e.linep >= elinep)
|
---|
2289 | err("word too long");
|
---|
2290 | else
|
---|
2291 | *e.linep++ = c;
|
---|
2292 | };
|
---|
2293 |
|
---|
2294 | unget(c);
|
---|
2295 |
|
---|
2296 | if (any(c, "\"'`$"))
|
---|
2297 | goto loop;
|
---|
2298 |
|
---|
2299 | *e.linep++ = '\0';
|
---|
2300 |
|
---|
2301 | if (atstart) {
|
---|
2302 | c = rlookup(line);
|
---|
2303 | if (c != 0) {
|
---|
2304 | startl = 1;
|
---|
2305 | return c;
|
---|
2306 | }
|
---|
2307 | }
|
---|
2308 |
|
---|
2309 | yylval.cp = strsave(line, areanum);
|
---|
2310 | return WORD;
|
---|
2311 | }
|
---|
2312 |
|
---|
2313 |
|
---|
2314 | static int collect(int c, int c1)
|
---|
2315 | {
|
---|
2316 | char s[2];
|
---|
2317 |
|
---|
2318 | DBGPRINTF8(("COLLECT: enter, c=%d, c1=%d\n", c, c1));
|
---|
2319 |
|
---|
2320 | *e.linep++ = c;
|
---|
2321 | while ((c = my_getc(c1)) != c1) {
|
---|
2322 | if (c == 0) {
|
---|
2323 | unget(c);
|
---|
2324 | s[0] = c1;
|
---|
2325 | s[1] = 0;
|
---|
2326 | prs("no closing ");
|
---|
2327 | yyerror(s);
|
---|
2328 | return YYERRCODE;
|
---|
2329 | }
|
---|
2330 | if (interactive && c == '\n' && e.iop <= iostack) {
|
---|
2331 | #if ENABLE_FEATURE_EDITING
|
---|
2332 | current_prompt = cprompt->value;
|
---|
2333 | #else
|
---|
2334 | prs(cprompt->value);
|
---|
2335 | #endif
|
---|
2336 | }
|
---|
2337 | *e.linep++ = c;
|
---|
2338 | }
|
---|
2339 |
|
---|
2340 | *e.linep++ = c;
|
---|
2341 |
|
---|
2342 | DBGPRINTF8(("COLLECT: return 0, line is %s\n", line));
|
---|
2343 |
|
---|
2344 | return 0;
|
---|
2345 | }
|
---|
2346 |
|
---|
2347 | /* "multiline commands" helper func */
|
---|
2348 | /* see if next 2 chars form a shell multiline */
|
---|
2349 | static int dual(int c)
|
---|
2350 | {
|
---|
2351 | char s[3];
|
---|
2352 | char *cp = s;
|
---|
2353 |
|
---|
2354 | DBGPRINTF8(("DUAL: enter, c=%d\n", c));
|
---|
2355 |
|
---|
2356 | *cp++ = c; /* c is the given "peek" char */
|
---|
2357 | *cp++ = my_getc(0); /* get next char of input */
|
---|
2358 | *cp = '\0'; /* add EOS marker */
|
---|
2359 |
|
---|
2360 | c = rlookup(s); /* see if 2 chars form a shell multiline */
|
---|
2361 | if (c == 0)
|
---|
2362 | unget(*--cp); /* String is not a shell multiline, put peek char back */
|
---|
2363 |
|
---|
2364 | return c; /* String is multiline, return numeric multiline (restab) code */
|
---|
2365 | }
|
---|
2366 |
|
---|
2367 | static void diag(int ec)
|
---|
2368 | {
|
---|
2369 | int c;
|
---|
2370 |
|
---|
2371 | DBGPRINTF8(("DIAG: enter, ec=%d\n", ec));
|
---|
2372 |
|
---|
2373 | c = my_getc(0);
|
---|
2374 | if (c == '>' || c == '<') {
|
---|
2375 | if (c != ec)
|
---|
2376 | zzerr();
|
---|
2377 | yylval.i = (ec == '>' ? IOWRITE | IOCAT : IOHERE);
|
---|
2378 | c = my_getc(0);
|
---|
2379 | } else
|
---|
2380 | yylval.i = (ec == '>' ? IOWRITE : IOREAD);
|
---|
2381 | if (c != '&' || yylval.i == IOHERE)
|
---|
2382 | unget(c);
|
---|
2383 | else
|
---|
2384 | yylval.i |= IODUP;
|
---|
2385 | }
|
---|
2386 |
|
---|
2387 | static char *tree(unsigned size)
|
---|
2388 | {
|
---|
2389 | char *t;
|
---|
2390 |
|
---|
2391 | t = getcell(size);
|
---|
2392 | if (t == NULL) {
|
---|
2393 | DBGPRINTF2(("TREE: getcell(%d) failed!\n", size));
|
---|
2394 | prs("command line too complicated\n");
|
---|
2395 | fail();
|
---|
2396 | /* NOTREACHED */
|
---|
2397 | }
|
---|
2398 | return t;
|
---|
2399 | }
|
---|
2400 |
|
---|
2401 |
|
---|
2402 | /* VARARGS1 */
|
---|
2403 | /* ARGSUSED */
|
---|
2404 |
|
---|
2405 | /* -------- exec.c -------- */
|
---|
2406 |
|
---|
2407 | static struct op **find1case(struct op *t, const char *w)
|
---|
2408 | {
|
---|
2409 | struct op *t1;
|
---|
2410 | struct op **tp;
|
---|
2411 | char **wp;
|
---|
2412 | char *cp;
|
---|
2413 |
|
---|
2414 | if (t == NULL) {
|
---|
2415 | DBGPRINTF3(("FIND1CASE: enter, t==NULL, returning.\n"));
|
---|
2416 | return NULL;
|
---|
2417 | }
|
---|
2418 |
|
---|
2419 | DBGPRINTF3(("FIND1CASE: enter, t->type=%d (%s)\n", t->type,
|
---|
2420 | T_CMD_NAMES[t->type]));
|
---|
2421 |
|
---|
2422 | if (t->type == TLIST) {
|
---|
2423 | tp = find1case(t->left, w);
|
---|
2424 | if (tp != NULL) {
|
---|
2425 | DBGPRINTF3(("FIND1CASE: found one to the left, returning tp=%p\n", tp));
|
---|
2426 | return tp;
|
---|
2427 | }
|
---|
2428 | t1 = t->right; /* TPAT */
|
---|
2429 | } else
|
---|
2430 | t1 = t;
|
---|
2431 |
|
---|
2432 | for (wp = t1->words; *wp;) {
|
---|
2433 | cp = evalstr(*wp++, DOSUB);
|
---|
2434 | if (cp && gmatch(w, cp)) {
|
---|
2435 | DBGPRINTF3(("FIND1CASE: returning &t1->left= %p.\n",
|
---|
2436 | &t1->left));
|
---|
2437 | return &t1->left;
|
---|
2438 | }
|
---|
2439 | }
|
---|
2440 |
|
---|
2441 | DBGPRINTF(("FIND1CASE: returning NULL\n"));
|
---|
2442 | return NULL;
|
---|
2443 | }
|
---|
2444 |
|
---|
2445 | static struct op *findcase(struct op *t, const char *w)
|
---|
2446 | {
|
---|
2447 | struct op **tp;
|
---|
2448 |
|
---|
2449 | tp = find1case(t, w);
|
---|
2450 | return tp != NULL ? *tp : NULL;
|
---|
2451 | }
|
---|
2452 |
|
---|
2453 | /*
|
---|
2454 | * execute tree
|
---|
2455 | */
|
---|
2456 |
|
---|
2457 | static int execute(struct op *t, int *pin, int *pout, int act)
|
---|
2458 | {
|
---|
2459 | struct op *t1;
|
---|
2460 | volatile int i, rv, a;
|
---|
2461 | const char *cp;
|
---|
2462 | char **wp, **wp2;
|
---|
2463 | struct var *vp;
|
---|
2464 | struct op *outtree_save;
|
---|
2465 | struct brkcon bc;
|
---|
2466 |
|
---|
2467 | #if __GNUC__
|
---|
2468 | /* Avoid longjmp clobbering */
|
---|
2469 | (void) ℘
|
---|
2470 | #endif
|
---|
2471 |
|
---|
2472 | if (t == NULL) {
|
---|
2473 | DBGPRINTF4(("EXECUTE: enter, t==null, returning.\n"));
|
---|
2474 | return 0;
|
---|
2475 | }
|
---|
2476 |
|
---|
2477 | DBGPRINTF(("EXECUTE: t=%p, t->type=%d (%s), t->words is %s\n", t,
|
---|
2478 | t->type, T_CMD_NAMES[t->type],
|
---|
2479 | ((t->words == NULL) ? "NULL" : t->words[0])));
|
---|
2480 |
|
---|
2481 | rv = 0;
|
---|
2482 | a = areanum++;
|
---|
2483 | wp = (wp2 = t->words) != NULL
|
---|
2484 | ? eval(wp2, t->type == TCOM ? DOALL : DOALL & ~DOKEY)
|
---|
2485 | : NULL;
|
---|
2486 |
|
---|
2487 | switch (t->type) {
|
---|
2488 | case TDOT:
|
---|
2489 | DBGPRINTF3(("EXECUTE: TDOT\n"));
|
---|
2490 |
|
---|
2491 | outtree_save = outtree;
|
---|
2492 |
|
---|
2493 | newfile(evalstr(t->words[0], DOALL));
|
---|
2494 |
|
---|
2495 | t->left = dowholefile(TLIST, 0);
|
---|
2496 | t->right = NULL;
|
---|
2497 |
|
---|
2498 | outtree = outtree_save;
|
---|
2499 |
|
---|
2500 | if (t->left)
|
---|
2501 | rv = execute(t->left, pin, pout, 0);
|
---|
2502 | if (t->right)
|
---|
2503 | rv = execute(t->right, pin, pout, 0);
|
---|
2504 | break;
|
---|
2505 |
|
---|
2506 | case TPAREN:
|
---|
2507 | rv = execute(t->left, pin, pout, 0);
|
---|
2508 | break;
|
---|
2509 |
|
---|
2510 | case TCOM:
|
---|
2511 | rv = forkexec(t, pin, pout, act, wp);
|
---|
2512 | break;
|
---|
2513 |
|
---|
2514 | case TPIPE:
|
---|
2515 | {
|
---|
2516 | int pv[2];
|
---|
2517 |
|
---|
2518 | rv = openpipe(pv);
|
---|
2519 | if (rv < 0)
|
---|
2520 | break;
|
---|
2521 | pv[0] = remap(pv[0]);
|
---|
2522 | pv[1] = remap(pv[1]);
|
---|
2523 | (void) execute(t->left, pin, pv, 0);
|
---|
2524 | rv = execute(t->right, pv, pout, 0);
|
---|
2525 | }
|
---|
2526 | break;
|
---|
2527 |
|
---|
2528 | case TLIST:
|
---|
2529 | (void) execute(t->left, pin, pout, 0);
|
---|
2530 | rv = execute(t->right, pin, pout, 0);
|
---|
2531 | break;
|
---|
2532 |
|
---|
2533 | case TASYNC:
|
---|
2534 | {
|
---|
2535 | int hinteractive = interactive;
|
---|
2536 |
|
---|
2537 | DBGPRINTF7(("EXECUTE: TASYNC clause, calling vfork()...\n"));
|
---|
2538 |
|
---|
2539 | i = vfork();
|
---|
2540 | if (i == 0) { /* child */
|
---|
2541 | signal(SIGINT, SIG_IGN);
|
---|
2542 | signal(SIGQUIT, SIG_IGN);
|
---|
2543 | if (interactive)
|
---|
2544 | signal(SIGTERM, SIG_DFL);
|
---|
2545 | interactive = 0;
|
---|
2546 | if (pin == NULL) {
|
---|
2547 | close(0);
|
---|
2548 | xopen(bb_dev_null, O_RDONLY);
|
---|
2549 | }
|
---|
2550 | _exit(execute(t->left, pin, pout, FEXEC));
|
---|
2551 | }
|
---|
2552 | interactive = hinteractive;
|
---|
2553 | if (i != -1) {
|
---|
2554 | setval(lookup("!"), putn(i));
|
---|
2555 | if (pin != NULL)
|
---|
2556 | closepipe(pin);
|
---|
2557 | if (interactive) {
|
---|
2558 | prs(putn(i));
|
---|
2559 | prs("\n");
|
---|
2560 | }
|
---|
2561 | } else
|
---|
2562 | rv = -1;
|
---|
2563 | setstatus(rv);
|
---|
2564 | }
|
---|
2565 | break;
|
---|
2566 |
|
---|
2567 | case TOR:
|
---|
2568 | case TAND:
|
---|
2569 | rv = execute(t->left, pin, pout, 0);
|
---|
2570 | t1 = t->right;
|
---|
2571 | if (t1 != NULL && (rv == 0) == (t->type == TAND))
|
---|
2572 | rv = execute(t1, pin, pout, 0);
|
---|
2573 | break;
|
---|
2574 |
|
---|
2575 | case TFOR:
|
---|
2576 | if (wp == NULL) {
|
---|
2577 | wp = dolv + 1;
|
---|
2578 | i = dolc;
|
---|
2579 | if (i < 0)
|
---|
2580 | i = 0;
|
---|
2581 | } else {
|
---|
2582 | i = -1;
|
---|
2583 | while (*wp++ != NULL);
|
---|
2584 | }
|
---|
2585 | vp = lookup(t->str);
|
---|
2586 | while (setjmp(bc.brkpt))
|
---|
2587 | if (isbreak)
|
---|
2588 | goto broken;
|
---|
2589 | brkset(&bc);
|
---|
2590 | for (t1 = t->left; i-- && *wp != NULL;) {
|
---|
2591 | setval(vp, *wp++);
|
---|
2592 | rv = execute(t1, pin, pout, 0);
|
---|
2593 | }
|
---|
2594 | brklist = brklist->nextlev;
|
---|
2595 | break;
|
---|
2596 |
|
---|
2597 | case TWHILE:
|
---|
2598 | case TUNTIL:
|
---|
2599 | while (setjmp(bc.brkpt))
|
---|
2600 | if (isbreak)
|
---|
2601 | goto broken;
|
---|
2602 | brkset(&bc);
|
---|
2603 | t1 = t->left;
|
---|
2604 | while ((execute(t1, pin, pout, 0) == 0) == (t->type == TWHILE))
|
---|
2605 | rv = execute(t->right, pin, pout, 0);
|
---|
2606 | brklist = brklist->nextlev;
|
---|
2607 | break;
|
---|
2608 |
|
---|
2609 | case TIF:
|
---|
2610 | case TELIF:
|
---|
2611 | if (t->right != NULL) {
|
---|
2612 | rv = !execute(t->left, pin, pout, 0) ?
|
---|
2613 | execute(t->right->left, pin, pout, 0) :
|
---|
2614 | execute(t->right->right, pin, pout, 0);
|
---|
2615 | }
|
---|
2616 | break;
|
---|
2617 |
|
---|
2618 | case TCASE:
|
---|
2619 | cp = evalstr(t->str, DOSUB | DOTRIM);
|
---|
2620 | if (cp == NULL)
|
---|
2621 | cp = "";
|
---|
2622 |
|
---|
2623 | DBGPRINTF7(("EXECUTE: TCASE, t->str is %s, cp is %s\n",
|
---|
2624 | ((t->str == NULL) ? "NULL" : t->str),
|
---|
2625 | ((cp == NULL) ? "NULL" : cp)));
|
---|
2626 |
|
---|
2627 | t1 = findcase(t->left, cp);
|
---|
2628 | if (t1 != NULL) {
|
---|
2629 | DBGPRINTF7(("EXECUTE: TCASE, calling execute(t=%p, t1=%p)...\n", t, t1));
|
---|
2630 | rv = execute(t1, pin, pout, 0);
|
---|
2631 | DBGPRINTF7(("EXECUTE: TCASE, back from execute(t=%p, t1=%p)...\n", t, t1));
|
---|
2632 | }
|
---|
2633 | break;
|
---|
2634 |
|
---|
2635 | case TBRACE:
|
---|
2636 | /*
|
---|
2637 | iopp = t->ioact;
|
---|
2638 | if (i)
|
---|
2639 | while (*iopp)
|
---|
2640 | if (iosetup(*iopp++, pin!=NULL, pout!=NULL)) {
|
---|
2641 | rv = -1;
|
---|
2642 | break;
|
---|
2643 | }
|
---|
2644 | */
|
---|
2645 | if (rv >= 0) {
|
---|
2646 | t1 = t->left;
|
---|
2647 | if (t1) {
|
---|
2648 | rv = execute(t1, pin, pout, 0);
|
---|
2649 | }
|
---|
2650 | }
|
---|
2651 | break;
|
---|
2652 |
|
---|
2653 | };
|
---|
2654 |
|
---|
2655 | broken:
|
---|
2656 | t->words = wp2;
|
---|
2657 | isbreak = 0;
|
---|
2658 | freehere(areanum);
|
---|
2659 | freearea(areanum);
|
---|
2660 | areanum = a;
|
---|
2661 | if (interactive && intr) {
|
---|
2662 | closeall();
|
---|
2663 | fail();
|
---|
2664 | }
|
---|
2665 |
|
---|
2666 | i = trapset;
|
---|
2667 | if (i != 0) {
|
---|
2668 | trapset = 0;
|
---|
2669 | runtrap(i);
|
---|
2670 | }
|
---|
2671 |
|
---|
2672 | DBGPRINTF(("EXECUTE: returning from t=%p, rv=%d\n", t, rv));
|
---|
2673 | return rv;
|
---|
2674 | }
|
---|
2675 |
|
---|
2676 | typedef int (*builtin_func_ptr)(struct op *);
|
---|
2677 |
|
---|
2678 | static builtin_func_ptr inbuilt(const char *s)
|
---|
2679 | {
|
---|
2680 | const struct builtincmd *bp;
|
---|
2681 |
|
---|
2682 | for (bp = builtincmds; bp->name; bp++)
|
---|
2683 | if (strcmp(bp->name, s) == 0)
|
---|
2684 | return bp->builtinfunc;
|
---|
2685 | return NULL;
|
---|
2686 | }
|
---|
2687 |
|
---|
2688 | static int forkexec(struct op *t, int *pin, int *pout, int act, char **wp)
|
---|
2689 | {
|
---|
2690 | pid_t newpid;
|
---|
2691 | int i, rv;
|
---|
2692 | builtin_func_ptr shcom = NULL;
|
---|
2693 | int f;
|
---|
2694 | const char *cp = NULL;
|
---|
2695 | struct ioword **iopp;
|
---|
2696 | int resetsig;
|
---|
2697 | char **owp;
|
---|
2698 | int forked = 0;
|
---|
2699 |
|
---|
2700 | int *hpin = pin;
|
---|
2701 | int *hpout = pout;
|
---|
2702 | char *hwp;
|
---|
2703 | int hinteractive;
|
---|
2704 | int hintr;
|
---|
2705 | struct brkcon *hbrklist;
|
---|
2706 | int hexecflg;
|
---|
2707 |
|
---|
2708 | #if __GNUC__
|
---|
2709 | /* Avoid longjmp clobbering */
|
---|
2710 | (void) &pin;
|
---|
2711 | (void) &pout;
|
---|
2712 | (void) ℘
|
---|
2713 | (void) &shcom;
|
---|
2714 | (void) &cp;
|
---|
2715 | (void) &resetsig;
|
---|
2716 | (void) &owp;
|
---|
2717 | #endif
|
---|
2718 |
|
---|
2719 | DBGPRINTF(("FORKEXEC: t=%p, pin %p, pout %p, act %d\n", t, pin,
|
---|
2720 | pout, act));
|
---|
2721 | DBGPRINTF7(("FORKEXEC: t->words is %s\n",
|
---|
2722 | ((t->words == NULL) ? "NULL" : t->words[0])));
|
---|
2723 |
|
---|
2724 | owp = wp;
|
---|
2725 | resetsig = 0;
|
---|
2726 | rv = -1; /* system-detected error */
|
---|
2727 | if (t->type == TCOM) {
|
---|
2728 | while (*wp++ != NULL)
|
---|
2729 | continue;
|
---|
2730 | cp = *wp;
|
---|
2731 |
|
---|
2732 | /* strip all initial assignments */
|
---|
2733 | /* not correct wrt PATH=yyy command etc */
|
---|
2734 | if (FLAG['x']) {
|
---|
2735 | DBGPRINTF9(("FORKEXEC: echo'ing, cp=%p, wp=%p, owp=%p\n",
|
---|
2736 | cp, wp, owp));
|
---|
2737 | echo(cp ? wp : owp);
|
---|
2738 | }
|
---|
2739 |
|
---|
2740 | if (cp == NULL && t->ioact == NULL) {
|
---|
2741 | while ((cp = *owp++) != NULL && assign(cp, COPYV))
|
---|
2742 | continue;
|
---|
2743 | DBGPRINTF(("FORKEXEC: returning setstatus()\n"));
|
---|
2744 | return setstatus(0);
|
---|
2745 | }
|
---|
2746 | if (cp != NULL) {
|
---|
2747 | shcom = inbuilt(cp);
|
---|
2748 | }
|
---|
2749 | }
|
---|
2750 |
|
---|
2751 | t->words = wp;
|
---|
2752 | f = act;
|
---|
2753 |
|
---|
2754 | DBGPRINTF(("FORKEXEC: shcom %p, f&FEXEC 0x%x, owp %p\n", shcom,
|
---|
2755 | f & FEXEC, owp));
|
---|
2756 |
|
---|
2757 | if (shcom == NULL && (f & FEXEC) == 0) {
|
---|
2758 | /* Save values in case the child process alters them */
|
---|
2759 | hpin = pin;
|
---|
2760 | hpout = pout;
|
---|
2761 | hwp = *wp;
|
---|
2762 | hinteractive = interactive;
|
---|
2763 | hintr = intr;
|
---|
2764 | hbrklist = brklist;
|
---|
2765 | hexecflg = execflg;
|
---|
2766 |
|
---|
2767 | DBGPRINTF3(("FORKEXEC: calling vfork()...\n"));
|
---|
2768 |
|
---|
2769 | newpid = vfork();
|
---|
2770 |
|
---|
2771 | if (newpid == -1) {
|
---|
2772 | DBGPRINTF(("FORKEXEC: ERROR, cannot vfork()!\n"));
|
---|
2773 | return -1;
|
---|
2774 | }
|
---|
2775 |
|
---|
2776 | if (newpid > 0) { /* Parent */
|
---|
2777 | /* Restore values */
|
---|
2778 | pin = hpin;
|
---|
2779 | pout = hpout;
|
---|
2780 | *wp = hwp;
|
---|
2781 | interactive = hinteractive;
|
---|
2782 | intr = hintr;
|
---|
2783 | brklist = hbrklist;
|
---|
2784 | execflg = hexecflg;
|
---|
2785 | /* moved up
|
---|
2786 | if (i == -1)
|
---|
2787 | return rv;
|
---|
2788 | */
|
---|
2789 | if (pin != NULL)
|
---|
2790 | closepipe(pin);
|
---|
2791 |
|
---|
2792 | return (pout == NULL ? setstatus(waitfor(newpid, 0)) : 0);
|
---|
2793 | }
|
---|
2794 |
|
---|
2795 | /* Must be the child process, pid should be 0 */
|
---|
2796 | DBGPRINTF(("FORKEXEC: child process, shcom=%p\n", shcom));
|
---|
2797 |
|
---|
2798 | if (interactive) {
|
---|
2799 | signal(SIGINT, SIG_IGN);
|
---|
2800 | signal(SIGQUIT, SIG_IGN);
|
---|
2801 | resetsig = 1;
|
---|
2802 | }
|
---|
2803 | interactive = 0;
|
---|
2804 | intr = 0;
|
---|
2805 | forked = 1;
|
---|
2806 | brklist = 0;
|
---|
2807 | execflg = 0;
|
---|
2808 | }
|
---|
2809 |
|
---|
2810 | if (owp != NULL)
|
---|
2811 | while ((cp = *owp++) != NULL && assign(cp, COPYV))
|
---|
2812 | if (shcom == NULL)
|
---|
2813 | export(lookup(cp));
|
---|
2814 |
|
---|
2815 | #ifdef COMPIPE
|
---|
2816 | if ((pin != NULL || pout != NULL) && shcom != NULL && shcom != doexec) {
|
---|
2817 | err("piping to/from shell builtins not yet done");
|
---|
2818 | if (forked)
|
---|
2819 | _exit(-1);
|
---|
2820 | return -1;
|
---|
2821 | }
|
---|
2822 | #endif
|
---|
2823 |
|
---|
2824 | if (pin != NULL) {
|
---|
2825 | xmove_fd(pin[0], 0);
|
---|
2826 | if (pin[1] != 0) close(pin[1]);
|
---|
2827 | }
|
---|
2828 | if (pout != NULL) {
|
---|
2829 | xmove_fd(pout[1], 1);
|
---|
2830 | if (pout[1] != 1) close(pout[0]);
|
---|
2831 | }
|
---|
2832 |
|
---|
2833 | iopp = t->ioact;
|
---|
2834 | if (iopp != NULL) {
|
---|
2835 | if (shcom != NULL && shcom != doexec) {
|
---|
2836 | prs(cp);
|
---|
2837 | err(": cannot redirect shell command");
|
---|
2838 | if (forked)
|
---|
2839 | _exit(-1);
|
---|
2840 | return -1;
|
---|
2841 | }
|
---|
2842 | while (*iopp)
|
---|
2843 | if (iosetup(*iopp++, pin != NULL, pout != NULL)) {
|
---|
2844 | if (forked)
|
---|
2845 | _exit(rv);
|
---|
2846 | return rv;
|
---|
2847 | }
|
---|
2848 | }
|
---|
2849 |
|
---|
2850 | if (shcom) {
|
---|
2851 | i = setstatus((*shcom) (t));
|
---|
2852 | if (forked)
|
---|
2853 | _exit(i);
|
---|
2854 | DBGPRINTF(("FORKEXEC: returning i=%d\n", i));
|
---|
2855 | return i;
|
---|
2856 | }
|
---|
2857 |
|
---|
2858 | /* should use FIOCEXCL */
|
---|
2859 | for (i = FDBASE; i < NOFILE; i++)
|
---|
2860 | close(i);
|
---|
2861 | if (resetsig) {
|
---|
2862 | signal(SIGINT, SIG_DFL);
|
---|
2863 | signal(SIGQUIT, SIG_DFL);
|
---|
2864 | }
|
---|
2865 |
|
---|
2866 | if (t->type == TPAREN)
|
---|
2867 | _exit(execute(t->left, NOPIPE, NOPIPE, FEXEC));
|
---|
2868 | if (wp[0] == NULL)
|
---|
2869 | _exit(0);
|
---|
2870 |
|
---|
2871 | cp = rexecve(wp[0], wp, makenv(0, NULL));
|
---|
2872 | prs(wp[0]);
|
---|
2873 | prs(": ");
|
---|
2874 | err(cp);
|
---|
2875 | if (!execflg)
|
---|
2876 | trap[0] = NULL;
|
---|
2877 |
|
---|
2878 | DBGPRINTF(("FORKEXEC: calling leave(), pid=%d\n", newpid));
|
---|
2879 |
|
---|
2880 | leave();
|
---|
2881 | /* NOTREACHED */
|
---|
2882 | _exit(1);
|
---|
2883 | }
|
---|
2884 |
|
---|
2885 | /*
|
---|
2886 | * 0< 1> are ignored as required
|
---|
2887 | * within pipelines.
|
---|
2888 | */
|
---|
2889 | static int iosetup(struct ioword *iop, int pipein, int pipeout)
|
---|
2890 | {
|
---|
2891 | int u = -1;
|
---|
2892 | char *cp = NULL;
|
---|
2893 | const char *msg;
|
---|
2894 |
|
---|
2895 | DBGPRINTF(("IOSETUP: iop %p, pipein %i, pipeout %i\n", iop,
|
---|
2896 | pipein, pipeout));
|
---|
2897 |
|
---|
2898 | if (iop->io_unit == IODEFAULT) /* take default */
|
---|
2899 | iop->io_unit = iop->io_flag & (IOREAD | IOHERE) ? 0 : 1;
|
---|
2900 |
|
---|
2901 | if (pipein && iop->io_unit == 0)
|
---|
2902 | return 0;
|
---|
2903 |
|
---|
2904 | if (pipeout && iop->io_unit == 1)
|
---|
2905 | return 0;
|
---|
2906 |
|
---|
2907 | msg = iop->io_flag & (IOREAD | IOHERE) ? "open" : "create";
|
---|
2908 | if ((iop->io_flag & IOHERE) == 0) {
|
---|
2909 | cp = iop->io_name; /* huh?? */
|
---|
2910 | cp = evalstr(cp, DOSUB | DOTRIM);
|
---|
2911 | if (cp == NULL)
|
---|
2912 | return 1;
|
---|
2913 | }
|
---|
2914 |
|
---|
2915 | if (iop->io_flag & IODUP) {
|
---|
2916 | if (cp[1] || (!isdigit(*cp) && *cp != '-')) {
|
---|
2917 | prs(cp);
|
---|
2918 | err(": illegal >& argument");
|
---|
2919 | return 1;
|
---|
2920 | }
|
---|
2921 | if (*cp == '-')
|
---|
2922 | iop->io_flag = IOCLOSE;
|
---|
2923 | iop->io_flag &= ~(IOREAD | IOWRITE);
|
---|
2924 | }
|
---|
2925 | switch (iop->io_flag) {
|
---|
2926 | case IOREAD:
|
---|
2927 | u = open(cp, O_RDONLY);
|
---|
2928 | break;
|
---|
2929 |
|
---|
2930 | case IOHERE:
|
---|
2931 | case IOHERE | IOXHERE:
|
---|
2932 | u = herein(iop->io_name, iop->io_flag & IOXHERE);
|
---|
2933 | cp = (char*)"here file";
|
---|
2934 | break;
|
---|
2935 |
|
---|
2936 | case IOWRITE | IOCAT:
|
---|
2937 | u = open(cp, O_WRONLY);
|
---|
2938 | if (u >= 0) {
|
---|
2939 | lseek(u, (long) 0, SEEK_END);
|
---|
2940 | break;
|
---|
2941 | }
|
---|
2942 | case IOWRITE:
|
---|
2943 | u = creat(cp, 0666);
|
---|
2944 | break;
|
---|
2945 |
|
---|
2946 | case IODUP:
|
---|
2947 | u = dup2(*cp - '0', iop->io_unit);
|
---|
2948 | break;
|
---|
2949 |
|
---|
2950 | case IOCLOSE:
|
---|
2951 | close(iop->io_unit);
|
---|
2952 | return 0;
|
---|
2953 | }
|
---|
2954 | if (u < 0) {
|
---|
2955 | prs(cp);
|
---|
2956 | prs(": cannot ");
|
---|
2957 | warn(msg);
|
---|
2958 | return 1;
|
---|
2959 | }
|
---|
2960 | if (u != iop->io_unit) {
|
---|
2961 | dup2(u, iop->io_unit);
|
---|
2962 | close(u);
|
---|
2963 | }
|
---|
2964 | return 0;
|
---|
2965 | }
|
---|
2966 |
|
---|
2967 | /*
|
---|
2968 | * Enter a new loop level (marked for break/continue).
|
---|
2969 | */
|
---|
2970 | static void brkset(struct brkcon *bc)
|
---|
2971 | {
|
---|
2972 | bc->nextlev = brklist;
|
---|
2973 | brklist = bc;
|
---|
2974 | }
|
---|
2975 |
|
---|
2976 | /*
|
---|
2977 | * Wait for the last process created.
|
---|
2978 | * Print a message for each process found
|
---|
2979 | * that was killed by a signal.
|
---|
2980 | * Ignore interrupt signals while waiting
|
---|
2981 | * unless `canintr' is true.
|
---|
2982 | */
|
---|
2983 | static int waitfor(int lastpid, int canintr)
|
---|
2984 | {
|
---|
2985 | int pid, rv;
|
---|
2986 | int s;
|
---|
2987 | int oheedint = heedint;
|
---|
2988 |
|
---|
2989 | heedint = 0;
|
---|
2990 | rv = 0;
|
---|
2991 | do {
|
---|
2992 | pid = wait(&s);
|
---|
2993 | if (pid == -1) {
|
---|
2994 | if (errno != EINTR || canintr)
|
---|
2995 | break;
|
---|
2996 | } else {
|
---|
2997 | rv = WAITSIG(s);
|
---|
2998 | if (rv != 0) {
|
---|
2999 | if (rv < ARRAY_SIZE(signame)) {
|
---|
3000 | if (signame[rv] != NULL) {
|
---|
3001 | if (pid != lastpid) {
|
---|
3002 | prn(pid);
|
---|
3003 | prs(": ");
|
---|
3004 | }
|
---|
3005 | prs(signame[rv]);
|
---|
3006 | }
|
---|
3007 | } else {
|
---|
3008 | if (pid != lastpid) {
|
---|
3009 | prn(pid);
|
---|
3010 | prs(": ");
|
---|
3011 | }
|
---|
3012 | prs("Signal ");
|
---|
3013 | prn(rv);
|
---|
3014 | prs(" ");
|
---|
3015 | }
|
---|
3016 | if (WAITCORE(s))
|
---|
3017 | prs(" - core dumped");
|
---|
3018 | if (rv >= ARRAY_SIZE(signame) || signame[rv])
|
---|
3019 | prs("\n");
|
---|
3020 | rv = -1;
|
---|
3021 | } else
|
---|
3022 | rv = WAITVAL(s);
|
---|
3023 | }
|
---|
3024 | } while (pid != lastpid);
|
---|
3025 | heedint = oheedint;
|
---|
3026 | if (intr) {
|
---|
3027 | if (interactive) {
|
---|
3028 | if (canintr)
|
---|
3029 | intr = 0;
|
---|
3030 | } else {
|
---|
3031 | if (exstat == 0)
|
---|
3032 | exstat = rv;
|
---|
3033 | onintr(0);
|
---|
3034 | }
|
---|
3035 | }
|
---|
3036 | return rv;
|
---|
3037 | }
|
---|
3038 |
|
---|
3039 | static int setstatus(int s)
|
---|
3040 | {
|
---|
3041 | exstat = s;
|
---|
3042 | setval(lookup("?"), putn(s));
|
---|
3043 | return s;
|
---|
3044 | }
|
---|
3045 |
|
---|
3046 | /*
|
---|
3047 | * PATH-searching interface to execve.
|
---|
3048 | * If getenv("PATH") were kept up-to-date,
|
---|
3049 | * execvp might be used.
|
---|
3050 | */
|
---|
3051 | static const char *rexecve(char *c, char **v, char **envp)
|
---|
3052 | {
|
---|
3053 | int i;
|
---|
3054 | const char *sp;
|
---|
3055 | char *tp;
|
---|
3056 | int eacces = 0, asis = 0;
|
---|
3057 | char *name = c;
|
---|
3058 |
|
---|
3059 | if (ENABLE_FEATURE_SH_STANDALONE) {
|
---|
3060 | if (find_applet_by_name(name)) {
|
---|
3061 | /* We have to exec here since we vforked. Running
|
---|
3062 | * run_applet_and_exit() won't work and bad things
|
---|
3063 | * will happen. */
|
---|
3064 | execve(bb_busybox_exec_path, v, envp);
|
---|
3065 | }
|
---|
3066 | }
|
---|
3067 |
|
---|
3068 | DBGPRINTF(("REXECVE: c=%p, v=%p, envp=%p\n", c, v, envp));
|
---|
3069 |
|
---|
3070 | sp = any('/', c) ? "" : path->value;
|
---|
3071 | asis = (*sp == '\0');
|
---|
3072 | while (asis || *sp != '\0') {
|
---|
3073 | asis = 0;
|
---|
3074 | tp = e.linep;
|
---|
3075 | for (; *sp != '\0'; tp++) {
|
---|
3076 | *tp = *sp++;
|
---|
3077 | if (*tp == ':') {
|
---|
3078 | asis = (*sp == '\0');
|
---|
3079 | break;
|
---|
3080 | }
|
---|
3081 | }
|
---|
3082 | if (tp != e.linep)
|
---|
3083 | *tp++ = '/';
|
---|
3084 | for (i = 0; (*tp++ = c[i++]) != '\0';);
|
---|
3085 |
|
---|
3086 | DBGPRINTF3(("REXECVE: e.linep is %s\n", e.linep));
|
---|
3087 |
|
---|
3088 | execve(e.linep, v, envp);
|
---|
3089 |
|
---|
3090 | switch (errno) {
|
---|
3091 | case ENOEXEC:
|
---|
3092 | *v = e.linep;
|
---|
3093 | tp = *--v;
|
---|
3094 | *v = e.linep;
|
---|
3095 | execve(DEFAULT_SHELL, v, envp);
|
---|
3096 | *v = tp;
|
---|
3097 | return "no Shell";
|
---|
3098 |
|
---|
3099 | case ENOMEM:
|
---|
3100 | return (char *) bb_msg_memory_exhausted;
|
---|
3101 |
|
---|
3102 | case E2BIG:
|
---|
3103 | return "argument list too long";
|
---|
3104 |
|
---|
3105 | case EACCES:
|
---|
3106 | eacces++;
|
---|
3107 | break;
|
---|
3108 | }
|
---|
3109 | }
|
---|
3110 | return errno == ENOENT ? "not found" : "cannot execute";
|
---|
3111 | }
|
---|
3112 |
|
---|
3113 | /*
|
---|
3114 | * Run the command produced by generator `f'
|
---|
3115 | * applied to stream `arg'.
|
---|
3116 | */
|
---|
3117 | static int run(struct ioarg *argp, int (*f) (struct ioarg *))
|
---|
3118 | {
|
---|
3119 | struct op *otree;
|
---|
3120 | struct wdblock *swdlist;
|
---|
3121 | struct wdblock *siolist;
|
---|
3122 | jmp_buf ev, rt;
|
---|
3123 | xint *ofail;
|
---|
3124 | int rv;
|
---|
3125 |
|
---|
3126 | #if __GNUC__
|
---|
3127 | /* Avoid longjmp clobbering */
|
---|
3128 | (void) &rv;
|
---|
3129 | #endif
|
---|
3130 |
|
---|
3131 | DBGPRINTF(("RUN: enter, areanum %d, outtree %p, failpt %p\n",
|
---|
3132 | areanum, outtree, failpt));
|
---|
3133 |
|
---|
3134 | areanum++;
|
---|
3135 | swdlist = wdlist;
|
---|
3136 | siolist = iolist;
|
---|
3137 | otree = outtree;
|
---|
3138 | ofail = failpt;
|
---|
3139 | rv = -1;
|
---|
3140 |
|
---|
3141 | errpt = ev;
|
---|
3142 | if (newenv(setjmp(errpt)) == 0) {
|
---|
3143 | wdlist = 0;
|
---|
3144 | iolist = 0;
|
---|
3145 | pushio(argp, f);
|
---|
3146 | e.iobase = e.iop;
|
---|
3147 | yynerrs = 0;
|
---|
3148 | failpt = rt;
|
---|
3149 | if (setjmp(failpt) == 0 && yyparse() == 0)
|
---|
3150 | rv = execute(outtree, NOPIPE, NOPIPE, 0);
|
---|
3151 | quitenv();
|
---|
3152 | } else {
|
---|
3153 | DBGPRINTF(("RUN: error from newenv()!\n"));
|
---|
3154 | }
|
---|
3155 |
|
---|
3156 | wdlist = swdlist;
|
---|
3157 | iolist = siolist;
|
---|
3158 | failpt = ofail;
|
---|
3159 | outtree = otree;
|
---|
3160 | freearea(areanum--);
|
---|
3161 |
|
---|
3162 | return rv;
|
---|
3163 | }
|
---|
3164 |
|
---|
3165 | /* -------- do.c -------- */
|
---|
3166 |
|
---|
3167 | /*
|
---|
3168 | * built-in commands: doX
|
---|
3169 | */
|
---|
3170 |
|
---|
3171 | static int dohelp(struct op *t)
|
---|
3172 | {
|
---|
3173 | int col;
|
---|
3174 | const struct builtincmd *x;
|
---|
3175 |
|
---|
3176 | puts("\nBuilt-in commands:\n"
|
---|
3177 | "-------------------");
|
---|
3178 |
|
---|
3179 | col = 0;
|
---|
3180 | x = builtincmds;
|
---|
3181 | while (x->name) {
|
---|
3182 | col += printf("%c%s", ((col == 0) ? '\t' : ' '), x->name);
|
---|
3183 | if (col > 60) {
|
---|
3184 | puts("");
|
---|
3185 | col = 0;
|
---|
3186 | }
|
---|
3187 | x++;
|
---|
3188 | }
|
---|
3189 | #if ENABLE_FEATURE_SH_STANDALONE
|
---|
3190 | {
|
---|
3191 | const struct bb_applet *applet = applets;
|
---|
3192 |
|
---|
3193 | while (applet->name) {
|
---|
3194 | col += printf("%c%s", ((col == 0) ? '\t' : ' '), applet->name);
|
---|
3195 | if (col > 60) {
|
---|
3196 | puts("");
|
---|
3197 | col = 0;
|
---|
3198 | }
|
---|
3199 | applet++;
|
---|
3200 | }
|
---|
3201 | }
|
---|
3202 | #endif
|
---|
3203 | puts("\n");
|
---|
3204 | return EXIT_SUCCESS;
|
---|
3205 | }
|
---|
3206 |
|
---|
3207 | static int dolabel(struct op *t)
|
---|
3208 | {
|
---|
3209 | return 0;
|
---|
3210 | }
|
---|
3211 |
|
---|
3212 | static int dochdir(struct op *t)
|
---|
3213 | {
|
---|
3214 | const char *cp, *er;
|
---|
3215 |
|
---|
3216 | cp = t->words[1];
|
---|
3217 | if (cp == NULL) {
|
---|
3218 | cp = homedir->value;
|
---|
3219 | if (cp != NULL)
|
---|
3220 | goto do_cd;
|
---|
3221 | er = ": no home directory";
|
---|
3222 | } else {
|
---|
3223 | do_cd:
|
---|
3224 | if (chdir(cp) >= 0)
|
---|
3225 | return 0;
|
---|
3226 | er = ": bad directory";
|
---|
3227 | }
|
---|
3228 | prs(cp != NULL ? cp : "cd");
|
---|
3229 | err(er);
|
---|
3230 | return 1;
|
---|
3231 | }
|
---|
3232 |
|
---|
3233 | static int doshift(struct op *t)
|
---|
3234 | {
|
---|
3235 | int n;
|
---|
3236 |
|
---|
3237 | n = t->words[1] ? getn(t->words[1]) : 1;
|
---|
3238 | if (dolc < n) {
|
---|
3239 | err("nothing to shift");
|
---|
3240 | return 1;
|
---|
3241 | }
|
---|
3242 | dolv[n] = dolv[0];
|
---|
3243 | dolv += n;
|
---|
3244 | dolc -= n;
|
---|
3245 | setval(lookup("#"), putn(dolc));
|
---|
3246 | return 0;
|
---|
3247 | }
|
---|
3248 |
|
---|
3249 | /*
|
---|
3250 | * execute login and newgrp directly
|
---|
3251 | */
|
---|
3252 | static int dologin(struct op *t)
|
---|
3253 | {
|
---|
3254 | const char *cp;
|
---|
3255 |
|
---|
3256 | if (interactive) {
|
---|
3257 | signal(SIGINT, SIG_DFL);
|
---|
3258 | signal(SIGQUIT, SIG_DFL);
|
---|
3259 | }
|
---|
3260 | cp = rexecve(t->words[0], t->words, makenv(0, NULL));
|
---|
3261 | prs(t->words[0]);
|
---|
3262 | prs(": ");
|
---|
3263 | err(cp);
|
---|
3264 | return 1;
|
---|
3265 | }
|
---|
3266 |
|
---|
3267 | static int doumask(struct op *t)
|
---|
3268 | {
|
---|
3269 | int i, n;
|
---|
3270 | char *cp;
|
---|
3271 |
|
---|
3272 | cp = t->words[1];
|
---|
3273 | if (cp == NULL) {
|
---|
3274 | i = umask(0);
|
---|
3275 | umask(i);
|
---|
3276 | for (n = 3 * 4; (n -= 3) >= 0;)
|
---|
3277 | putc('0' + ((i >> n) & 07), stderr);
|
---|
3278 | putc('\n', stderr);
|
---|
3279 | } else {
|
---|
3280 | /* huh??? '8','9' are not allowed! */
|
---|
3281 | for (n = 0; *cp >= '0' && *cp <= '9'; cp++)
|
---|
3282 | n = n * 8 + (*cp - '0');
|
---|
3283 | umask(n);
|
---|
3284 | }
|
---|
3285 | return 0;
|
---|
3286 | }
|
---|
3287 |
|
---|
3288 | static int doexec(struct op *t)
|
---|
3289 | {
|
---|
3290 | int i;
|
---|
3291 | jmp_buf ex;
|
---|
3292 | xint *ofail;
|
---|
3293 |
|
---|
3294 | t->ioact = NULL;
|
---|
3295 | for (i = 0; (t->words[i] = t->words[i + 1]) != NULL; i++);
|
---|
3296 | if (i == 0)
|
---|
3297 | return 1;
|
---|
3298 | execflg = 1;
|
---|
3299 | ofail = failpt;
|
---|
3300 | failpt = ex;
|
---|
3301 | if (setjmp(failpt) == 0)
|
---|
3302 | execute(t, NOPIPE, NOPIPE, FEXEC);
|
---|
3303 | failpt = ofail;
|
---|
3304 | execflg = 0;
|
---|
3305 | return 1;
|
---|
3306 | }
|
---|
3307 |
|
---|
3308 | static int dodot(struct op *t)
|
---|
3309 | {
|
---|
3310 | int i;
|
---|
3311 | const char *sp;
|
---|
3312 | char *tp;
|
---|
3313 | char *cp;
|
---|
3314 | int maltmp;
|
---|
3315 |
|
---|
3316 | DBGPRINTF(("DODOT: enter, t=%p, tleft %p, tright %p, e.linep is %s\n", t, t->left, t->right, ((e.linep == NULL) ? "NULL" : e.linep)));
|
---|
3317 |
|
---|
3318 | cp = t->words[1];
|
---|
3319 | if (cp == NULL) {
|
---|
3320 | DBGPRINTF(("DODOT: bad args, ret 0\n"));
|
---|
3321 | return 0;
|
---|
3322 | }
|
---|
3323 | DBGPRINTF(("DODOT: cp is %s\n", cp));
|
---|
3324 |
|
---|
3325 | sp = any('/', cp) ? ":" : path->value;
|
---|
3326 |
|
---|
3327 | DBGPRINTF(("DODOT: sp is %s, e.linep is %s\n",
|
---|
3328 | ((sp == NULL) ? "NULL" : sp),
|
---|
3329 | ((e.linep == NULL) ? "NULL" : e.linep)));
|
---|
3330 |
|
---|
3331 | while (*sp) {
|
---|
3332 | tp = e.linep;
|
---|
3333 | while (*sp && (*tp = *sp++) != ':')
|
---|
3334 | tp++;
|
---|
3335 | if (tp != e.linep)
|
---|
3336 | *tp++ = '/';
|
---|
3337 |
|
---|
3338 | for (i = 0; (*tp++ = cp[i++]) != '\0';);
|
---|
3339 |
|
---|
3340 | /* Original code */
|
---|
3341 | i = open(e.linep, O_RDONLY);
|
---|
3342 | if (i >= 0) {
|
---|
3343 | exstat = 0;
|
---|
3344 | maltmp = remap(i);
|
---|
3345 | DBGPRINTF(("DODOT: remap=%d, exstat=%d, e.iofd %d, i %d, e.linep is %s\n", maltmp, exstat, e.iofd, i, e.linep));
|
---|
3346 |
|
---|
3347 | next(maltmp); /* Basically a PUSHIO */
|
---|
3348 |
|
---|
3349 | DBGPRINTF(("DODOT: returning exstat=%d\n", exstat));
|
---|
3350 |
|
---|
3351 | return exstat;
|
---|
3352 | }
|
---|
3353 | } /* while */
|
---|
3354 |
|
---|
3355 | prs(cp);
|
---|
3356 | err(": not found");
|
---|
3357 |
|
---|
3358 | return -1;
|
---|
3359 | }
|
---|
3360 |
|
---|
3361 | static int dowait(struct op *t)
|
---|
3362 | {
|
---|
3363 | int i;
|
---|
3364 | char *cp;
|
---|
3365 |
|
---|
3366 | cp = t->words[1];
|
---|
3367 | if (cp != NULL) {
|
---|
3368 | i = getn(cp);
|
---|
3369 | if (i == 0)
|
---|
3370 | return 0;
|
---|
3371 | } else
|
---|
3372 | i = -1;
|
---|
3373 | setstatus(waitfor(i, 1));
|
---|
3374 | return 0;
|
---|
3375 | }
|
---|
3376 |
|
---|
3377 | static int doread(struct op *t)
|
---|
3378 | {
|
---|
3379 | char *cp, **wp;
|
---|
3380 | int nb = 0;
|
---|
3381 | int nl = 0;
|
---|
3382 |
|
---|
3383 | if (t->words[1] == NULL) {
|
---|
3384 | err("Usage: read name ...");
|
---|
3385 | return 1;
|
---|
3386 | }
|
---|
3387 | for (wp = t->words + 1; *wp; wp++) {
|
---|
3388 | for (cp = e.linep; !nl && cp < elinep - 1; cp++) {
|
---|
3389 | nb = read(0, cp, sizeof(*cp));
|
---|
3390 | if (nb != sizeof(*cp))
|
---|
3391 | break;
|
---|
3392 | nl = (*cp == '\n');
|
---|
3393 | if (nl || (wp[1] && any(*cp, ifs->value)))
|
---|
3394 | break;
|
---|
3395 | }
|
---|
3396 | *cp = '\0';
|
---|
3397 | if (nb <= 0)
|
---|
3398 | break;
|
---|
3399 | setval(lookup(*wp), e.linep);
|
---|
3400 | }
|
---|
3401 | return nb <= 0;
|
---|
3402 | }
|
---|
3403 |
|
---|
3404 | static int doeval(struct op *t)
|
---|
3405 | {
|
---|
3406 | return RUN(awordlist, t->words + 1, wdchar);
|
---|
3407 | }
|
---|
3408 |
|
---|
3409 | static int dotrap(struct op *t)
|
---|
3410 | {
|
---|
3411 | int n, i;
|
---|
3412 | int resetsig;
|
---|
3413 |
|
---|
3414 | if (t->words[1] == NULL) {
|
---|
3415 | for (i = 0; i <= _NSIG; i++)
|
---|
3416 | if (trap[i]) {
|
---|
3417 | prn(i);
|
---|
3418 | prs(": ");
|
---|
3419 | prs(trap[i]);
|
---|
3420 | prs("\n");
|
---|
3421 | }
|
---|
3422 | return 0;
|
---|
3423 | }
|
---|
3424 | resetsig = isdigit(*t->words[1]);
|
---|
3425 | for (i = resetsig ? 1 : 2; t->words[i] != NULL; ++i) {
|
---|
3426 | n = getsig(t->words[i]);
|
---|
3427 | freecell(trap[n]);
|
---|
3428 | trap[n] = 0;
|
---|
3429 | if (!resetsig) {
|
---|
3430 | if (*t->words[1] != '\0') {
|
---|
3431 | trap[n] = strsave(t->words[1], 0);
|
---|
3432 | setsig(n, sig);
|
---|
3433 | } else
|
---|
3434 | setsig(n, SIG_IGN);
|
---|
3435 | } else {
|
---|
3436 | if (interactive) {
|
---|
3437 | if (n == SIGINT)
|
---|
3438 | setsig(n, onintr);
|
---|
3439 | else
|
---|
3440 | setsig(n, n == SIGQUIT ? SIG_IGN : SIG_DFL);
|
---|
3441 | } else
|
---|
3442 | setsig(n, SIG_DFL);
|
---|
3443 | }
|
---|
3444 | }
|
---|
3445 | return 0;
|
---|
3446 | }
|
---|
3447 |
|
---|
3448 | static int getsig(char *s)
|
---|
3449 | {
|
---|
3450 | int n;
|
---|
3451 |
|
---|
3452 | n = getn(s);
|
---|
3453 | if (n < 0 || n > _NSIG) {
|
---|
3454 | err("trap: bad signal number");
|
---|
3455 | n = 0;
|
---|
3456 | }
|
---|
3457 | return n;
|
---|
3458 | }
|
---|
3459 |
|
---|
3460 | static void setsig(int n, sighandler_t f)
|
---|
3461 | {
|
---|
3462 | if (n == 0)
|
---|
3463 | return;
|
---|
3464 | if (signal(n, SIG_IGN) != SIG_IGN || ourtrap[n]) {
|
---|
3465 | ourtrap[n] = 1;
|
---|
3466 | signal(n, f);
|
---|
3467 | }
|
---|
3468 | }
|
---|
3469 |
|
---|
3470 | static int getn(char *as)
|
---|
3471 | {
|
---|
3472 | char *s;
|
---|
3473 | int n, m;
|
---|
3474 |
|
---|
3475 | s = as;
|
---|
3476 | m = 1;
|
---|
3477 | if (*s == '-') {
|
---|
3478 | m = -1;
|
---|
3479 | s++;
|
---|
3480 | }
|
---|
3481 | for (n = 0; isdigit(*s); s++)
|
---|
3482 | n = (n * 10) + (*s - '0');
|
---|
3483 | if (*s) {
|
---|
3484 | prs(as);
|
---|
3485 | err(": bad number");
|
---|
3486 | }
|
---|
3487 | return n * m;
|
---|
3488 | }
|
---|
3489 |
|
---|
3490 | static int dobreak(struct op *t)
|
---|
3491 | {
|
---|
3492 | return brkcontin(t->words[1], 1);
|
---|
3493 | }
|
---|
3494 |
|
---|
3495 | static int docontinue(struct op *t)
|
---|
3496 | {
|
---|
3497 | return brkcontin(t->words[1], 0);
|
---|
3498 | }
|
---|
3499 |
|
---|
3500 | static int brkcontin(char *cp, int val)
|
---|
3501 | {
|
---|
3502 | struct brkcon *bc;
|
---|
3503 | int nl;
|
---|
3504 |
|
---|
3505 | nl = cp == NULL ? 1 : getn(cp);
|
---|
3506 | if (nl <= 0)
|
---|
3507 | nl = 999;
|
---|
3508 | do {
|
---|
3509 | bc = brklist;
|
---|
3510 | if (bc == NULL)
|
---|
3511 | break;
|
---|
3512 | brklist = bc->nextlev;
|
---|
3513 | } while (--nl);
|
---|
3514 | if (nl) {
|
---|
3515 | err("bad break/continue level");
|
---|
3516 | return 1;
|
---|
3517 | }
|
---|
3518 | isbreak = val;
|
---|
3519 | longjmp(bc->brkpt, 1);
|
---|
3520 | /* NOTREACHED */
|
---|
3521 | }
|
---|
3522 |
|
---|
3523 | static int doexit(struct op *t)
|
---|
3524 | {
|
---|
3525 | char *cp;
|
---|
3526 |
|
---|
3527 | execflg = 0;
|
---|
3528 | cp = t->words[1];
|
---|
3529 | if (cp != NULL)
|
---|
3530 | setstatus(getn(cp));
|
---|
3531 |
|
---|
3532 | DBGPRINTF(("DOEXIT: calling leave(), t=%p\n", t));
|
---|
3533 |
|
---|
3534 | leave();
|
---|
3535 | /* NOTREACHED */
|
---|
3536 | return 0;
|
---|
3537 | }
|
---|
3538 |
|
---|
3539 | static int doexport(struct op *t)
|
---|
3540 | {
|
---|
3541 | rdexp(t->words + 1, export, EXPORT);
|
---|
3542 | return 0;
|
---|
3543 | }
|
---|
3544 |
|
---|
3545 | static int doreadonly(struct op *t)
|
---|
3546 | {
|
---|
3547 | rdexp(t->words + 1, ronly, RONLY);
|
---|
3548 | return 0;
|
---|
3549 | }
|
---|
3550 |
|
---|
3551 | static void rdexp(char **wp, void (*f) (struct var *), int key)
|
---|
3552 | {
|
---|
3553 | DBGPRINTF6(("RDEXP: enter, wp=%p, func=%p, key=%d\n", wp, f, key));
|
---|
3554 | DBGPRINTF6(("RDEXP: *wp=%s\n", *wp));
|
---|
3555 |
|
---|
3556 | if (*wp != NULL) {
|
---|
3557 | for (; *wp != NULL; wp++) {
|
---|
3558 | if (isassign(*wp)) {
|
---|
3559 | char *cp;
|
---|
3560 |
|
---|
3561 | assign(*wp, COPYV);
|
---|
3562 | for (cp = *wp; *cp != '='; cp++);
|
---|
3563 | *cp = '\0';
|
---|
3564 | }
|
---|
3565 | if (checkname(*wp))
|
---|
3566 | (*f) (lookup(*wp));
|
---|
3567 | else
|
---|
3568 | badid(*wp);
|
---|
3569 | }
|
---|
3570 | } else
|
---|
3571 | putvlist(key, 1);
|
---|
3572 | }
|
---|
3573 |
|
---|
3574 | static void badid(char *s)
|
---|
3575 | {
|
---|
3576 | prs(s);
|
---|
3577 | err(": bad identifier");
|
---|
3578 | }
|
---|
3579 |
|
---|
3580 | static int doset(struct op *t)
|
---|
3581 | {
|
---|
3582 | struct var *vp;
|
---|
3583 | char *cp;
|
---|
3584 | int n;
|
---|
3585 |
|
---|
3586 | cp = t->words[1];
|
---|
3587 | if (cp == NULL) {
|
---|
3588 | for (vp = vlist; vp; vp = vp->next)
|
---|
3589 | varput(vp->name, 1);
|
---|
3590 | return 0;
|
---|
3591 | }
|
---|
3592 | if (*cp == '-') {
|
---|
3593 | /* bad: t->words++; */
|
---|
3594 | for (n = 0; (t->words[n] = t->words[n + 1]) != NULL; n++);
|
---|
3595 | if (*++cp == 0)
|
---|
3596 | FLAG['x'] = FLAG['v'] = 0;
|
---|
3597 | else {
|
---|
3598 | for (; *cp; cp++) {
|
---|
3599 | switch (*cp) {
|
---|
3600 | case 'e':
|
---|
3601 | if (!interactive)
|
---|
3602 | FLAG['e']++;
|
---|
3603 | break;
|
---|
3604 |
|
---|
3605 | default:
|
---|
3606 | if (*cp >= 'a' && *cp <= 'z')
|
---|
3607 | FLAG[(int) *cp]++;
|
---|
3608 | break;
|
---|
3609 | }
|
---|
3610 | }
|
---|
3611 | }
|
---|
3612 | setdash();
|
---|
3613 | }
|
---|
3614 | if (t->words[1]) {
|
---|
3615 | t->words[0] = dolv[0];
|
---|
3616 | for (n = 1; t->words[n]; n++)
|
---|
3617 | setarea((char *) t->words[n], 0);
|
---|
3618 | dolc = n - 1;
|
---|
3619 | dolv = t->words;
|
---|
3620 | setval(lookup("#"), putn(dolc));
|
---|
3621 | setarea((char *) (dolv - 1), 0);
|
---|
3622 | }
|
---|
3623 | return 0;
|
---|
3624 | }
|
---|
3625 |
|
---|
3626 | static void varput(char *s, int out)
|
---|
3627 | {
|
---|
3628 | if (isalnum(*s) || *s == '_') {
|
---|
3629 | write(out, s, strlen(s));
|
---|
3630 | write(out, "\n", 1);
|
---|
3631 | }
|
---|
3632 | }
|
---|
3633 |
|
---|
3634 |
|
---|
3635 | /*
|
---|
3636 | * Copyright (c) 1999 Herbert Xu <herbert@debian.org>
|
---|
3637 | * This file contains code for the times builtin.
|
---|
3638 | */
|
---|
3639 | static int dotimes(struct op *t)
|
---|
3640 | {
|
---|
3641 | struct tms buf;
|
---|
3642 | long clk_tck = sysconf(_SC_CLK_TCK);
|
---|
3643 |
|
---|
3644 | times(&buf);
|
---|
3645 | printf("%dm%fs %dm%fs\n%dm%fs %dm%fs\n",
|
---|
3646 | (int) (buf.tms_utime / clk_tck / 60),
|
---|
3647 | ((double) buf.tms_utime) / clk_tck,
|
---|
3648 | (int) (buf.tms_stime / clk_tck / 60),
|
---|
3649 | ((double) buf.tms_stime) / clk_tck,
|
---|
3650 | (int) (buf.tms_cutime / clk_tck / 60),
|
---|
3651 | ((double) buf.tms_cutime) / clk_tck,
|
---|
3652 | (int) (buf.tms_cstime / clk_tck / 60),
|
---|
3653 | ((double) buf.tms_cstime) / clk_tck);
|
---|
3654 | return 0;
|
---|
3655 | }
|
---|
3656 |
|
---|
3657 |
|
---|
3658 | /* -------- eval.c -------- */
|
---|
3659 |
|
---|
3660 | /*
|
---|
3661 | * ${}
|
---|
3662 | * `command`
|
---|
3663 | * blank interpretation
|
---|
3664 | * quoting
|
---|
3665 | * glob
|
---|
3666 | */
|
---|
3667 |
|
---|
3668 | static char **eval(char **ap, int f)
|
---|
3669 | {
|
---|
3670 | struct wdblock *wb;
|
---|
3671 | char **wp;
|
---|
3672 | char **wf;
|
---|
3673 | jmp_buf ev;
|
---|
3674 |
|
---|
3675 | #if __GNUC__
|
---|
3676 | /* Avoid longjmp clobbering */
|
---|
3677 | (void) ℘
|
---|
3678 | (void) ≈
|
---|
3679 | #endif
|
---|
3680 |
|
---|
3681 | DBGPRINTF4(("EVAL: enter, f=%d\n", f));
|
---|
3682 |
|
---|
3683 | wp = NULL;
|
---|
3684 | wb = NULL;
|
---|
3685 | wf = NULL;
|
---|
3686 | errpt = ev;
|
---|
3687 | if (newenv(setjmp(errpt)) == 0) {
|
---|
3688 | while (*ap && isassign(*ap))
|
---|
3689 | expand(*ap++, &wb, f & ~DOGLOB);
|
---|
3690 | if (FLAG['k']) {
|
---|
3691 | for (wf = ap; *wf; wf++) {
|
---|
3692 | if (isassign(*wf))
|
---|
3693 | expand(*wf, &wb, f & ~DOGLOB);
|
---|
3694 | }
|
---|
3695 | }
|
---|
3696 | for (wb = addword((char *) 0, wb); *ap; ap++) {
|
---|
3697 | if (!FLAG['k'] || !isassign(*ap))
|
---|
3698 | expand(*ap, &wb, f & ~DOKEY);
|
---|
3699 | }
|
---|
3700 | wb = addword((char *) 0, wb);
|
---|
3701 | wp = getwords(wb);
|
---|
3702 | quitenv();
|
---|
3703 | } else
|
---|
3704 | gflg = 1;
|
---|
3705 |
|
---|
3706 | return gflg ? (char **) NULL : wp;
|
---|
3707 | }
|
---|
3708 |
|
---|
3709 |
|
---|
3710 | /*
|
---|
3711 | * Make the exported environment from the exported
|
---|
3712 | * names in the dictionary. Keyword assignments
|
---|
3713 | * will already have been done.
|
---|
3714 | */
|
---|
3715 | static char **makenv(int all, struct wdblock *wb)
|
---|
3716 | {
|
---|
3717 | struct var *vp;
|
---|
3718 |
|
---|
3719 | DBGPRINTF5(("MAKENV: enter, all=%d\n", all));
|
---|
3720 |
|
---|
3721 | for (vp = vlist; vp; vp = vp->next)
|
---|
3722 | if (all || vp->status & EXPORT)
|
---|
3723 | wb = addword(vp->name, wb);
|
---|
3724 | wb = addword((char *) 0, wb);
|
---|
3725 | return getwords(wb);
|
---|
3726 | }
|
---|
3727 |
|
---|
3728 | static int expand(const char *cp, struct wdblock **wbp, int f)
|
---|
3729 | {
|
---|
3730 | jmp_buf ev;
|
---|
3731 | char *xp;
|
---|
3732 |
|
---|
3733 | #if __GNUC__
|
---|
3734 | /* Avoid longjmp clobbering */
|
---|
3735 | (void) &cp;
|
---|
3736 | #endif
|
---|
3737 |
|
---|
3738 | DBGPRINTF3(("EXPAND: enter, f=%d\n", f));
|
---|
3739 |
|
---|
3740 | gflg = 0;
|
---|
3741 |
|
---|
3742 | if (cp == NULL)
|
---|
3743 | return 0;
|
---|
3744 |
|
---|
3745 | if (!anys("$`'\"", cp) && !anys(ifs->value, cp)
|
---|
3746 | && ((f & DOGLOB) == 0 || !anys("[*?", cp))
|
---|
3747 | ) {
|
---|
3748 | xp = strsave(cp, areanum);
|
---|
3749 | if (f & DOTRIM)
|
---|
3750 | unquote(xp);
|
---|
3751 | *wbp = addword(xp, *wbp);
|
---|
3752 | return 1;
|
---|
3753 | }
|
---|
3754 | errpt = ev;
|
---|
3755 | if (newenv(setjmp(errpt)) == 0) {
|
---|
3756 | PUSHIO(aword, cp, strchar);
|
---|
3757 | e.iobase = e.iop;
|
---|
3758 | while ((xp = blank(f)) && gflg == 0) {
|
---|
3759 | e.linep = xp;
|
---|
3760 | xp = strsave(xp, areanum);
|
---|
3761 | if ((f & DOGLOB) == 0) {
|
---|
3762 | if (f & DOTRIM)
|
---|
3763 | unquote(xp);
|
---|
3764 | *wbp = addword(xp, *wbp);
|
---|
3765 | } else
|
---|
3766 | *wbp = glob(xp, *wbp);
|
---|
3767 | }
|
---|
3768 | quitenv();
|
---|
3769 | } else
|
---|
3770 | gflg = 1;
|
---|
3771 | return gflg == 0;
|
---|
3772 | }
|
---|
3773 |
|
---|
3774 | static char *evalstr(char *cp, int f)
|
---|
3775 | {
|
---|
3776 | struct wdblock *wb;
|
---|
3777 |
|
---|
3778 | DBGPRINTF6(("EVALSTR: enter, cp=%p, f=%d\n", cp, f));
|
---|
3779 |
|
---|
3780 | wb = NULL;
|
---|
3781 | if (expand(cp, &wb, f)) {
|
---|
3782 | if (wb == NULL || wb->w_nword == 0
|
---|
3783 | || (cp = wb->w_words[0]) == NULL
|
---|
3784 | ) {
|
---|
3785 | // TODO: I suspect that
|
---|
3786 | // char *evalstr(char *cp, int f) is actually
|
---|
3787 | // const char *evalstr(const char *cp, int f)!
|
---|
3788 | cp = (char*)"";
|
---|
3789 | }
|
---|
3790 | DELETE(wb);
|
---|
3791 | } else
|
---|
3792 | cp = NULL;
|
---|
3793 | return cp;
|
---|
3794 | }
|
---|
3795 |
|
---|
3796 |
|
---|
3797 | /*
|
---|
3798 | * Blank interpretation and quoting
|
---|
3799 | */
|
---|
3800 | static char *blank(int f)
|
---|
3801 | {
|
---|
3802 | int c, c1;
|
---|
3803 | char *sp;
|
---|
3804 | int scanequals, foundequals;
|
---|
3805 |
|
---|
3806 | DBGPRINTF3(("BLANK: enter, f=%d\n", f));
|
---|
3807 |
|
---|
3808 | sp = e.linep;
|
---|
3809 | scanequals = f & DOKEY;
|
---|
3810 | foundequals = 0;
|
---|
3811 |
|
---|
3812 | loop:
|
---|
3813 | c = subgetc('"', foundequals);
|
---|
3814 | switch (c) {
|
---|
3815 | case 0:
|
---|
3816 | if (sp == e.linep)
|
---|
3817 | return 0;
|
---|
3818 | *e.linep++ = 0;
|
---|
3819 | return sp;
|
---|
3820 |
|
---|
3821 | default:
|
---|
3822 | if (f & DOBLANK && any(c, ifs->value))
|
---|
3823 | goto loop;
|
---|
3824 | break;
|
---|
3825 |
|
---|
3826 | case '"':
|
---|
3827 | case '\'':
|
---|
3828 | scanequals = 0;
|
---|
3829 | if (INSUB())
|
---|
3830 | break;
|
---|
3831 | for (c1 = c; (c = subgetc(c1, 1)) != c1;) {
|
---|
3832 | if (c == 0)
|
---|
3833 | break;
|
---|
3834 | if (c == '\'' || !any(c, "$`\""))
|
---|
3835 | c |= QUOTE;
|
---|
3836 | *e.linep++ = c;
|
---|
3837 | }
|
---|
3838 | c = 0;
|
---|
3839 | }
|
---|
3840 | unget(c);
|
---|
3841 | if (!isalpha(c) && c != '_')
|
---|
3842 | scanequals = 0;
|
---|
3843 | for (;;) {
|
---|
3844 | c = subgetc('"', foundequals);
|
---|
3845 | if (c == 0 ||
|
---|
3846 | f & (DOBLANK && any(c, ifs->value)) ||
|
---|
3847 | (!INSUB() && any(c, "\"'"))) {
|
---|
3848 | scanequals = 0;
|
---|
3849 | unget(c);
|
---|
3850 | if (any(c, "\"'"))
|
---|
3851 | goto loop;
|
---|
3852 | break;
|
---|
3853 | }
|
---|
3854 | if (scanequals) {
|
---|
3855 | if (c == '=') {
|
---|
3856 | foundequals = 1;
|
---|
3857 | scanequals = 0;
|
---|
3858 | } else if (!isalnum(c) && c != '_')
|
---|
3859 | scanequals = 0;
|
---|
3860 | }
|
---|
3861 | *e.linep++ = c;
|
---|
3862 | }
|
---|
3863 | *e.linep++ = 0;
|
---|
3864 | return sp;
|
---|
3865 | }
|
---|
3866 |
|
---|
3867 | /*
|
---|
3868 | * Get characters, substituting for ` and $
|
---|
3869 | */
|
---|
3870 | static int subgetc(char ec, int quoted)
|
---|
3871 | {
|
---|
3872 | char c;
|
---|
3873 |
|
---|
3874 | DBGPRINTF3(("SUBGETC: enter, quoted=%d\n", quoted));
|
---|
3875 |
|
---|
3876 | again:
|
---|
3877 | c = my_getc(ec);
|
---|
3878 | if (!INSUB() && ec != '\'') {
|
---|
3879 | if (c == '`') {
|
---|
3880 | if (grave(quoted) == 0)
|
---|
3881 | return 0;
|
---|
3882 | e.iop->task = XGRAVE;
|
---|
3883 | goto again;
|
---|
3884 | }
|
---|
3885 | if (c == '$') {
|
---|
3886 | c = dollar(quoted);
|
---|
3887 | if (c == 0) {
|
---|
3888 | e.iop->task = XDOLL;
|
---|
3889 | goto again;
|
---|
3890 | }
|
---|
3891 | }
|
---|
3892 | }
|
---|
3893 | return c;
|
---|
3894 | }
|
---|
3895 |
|
---|
3896 | /*
|
---|
3897 | * Prepare to generate the string returned by ${} substitution.
|
---|
3898 | */
|
---|
3899 | static int dollar(int quoted)
|
---|
3900 | {
|
---|
3901 | int otask;
|
---|
3902 | struct io *oiop;
|
---|
3903 | char *dolp;
|
---|
3904 | char *s, c, *cp = NULL;
|
---|
3905 | struct var *vp;
|
---|
3906 |
|
---|
3907 | DBGPRINTF3(("DOLLAR: enter, quoted=%d\n", quoted));
|
---|
3908 |
|
---|
3909 | c = readc();
|
---|
3910 | s = e.linep;
|
---|
3911 | if (c != '{') {
|
---|
3912 | *e.linep++ = c;
|
---|
3913 | if (isalpha(c) || c == '_') {
|
---|
3914 | while ((c = readc()) != 0 && (isalnum(c) || c == '_'))
|
---|
3915 | if (e.linep < elinep)
|
---|
3916 | *e.linep++ = c;
|
---|
3917 | unget(c);
|
---|
3918 | }
|
---|
3919 | c = 0;
|
---|
3920 | } else {
|
---|
3921 | oiop = e.iop;
|
---|
3922 | otask = e.iop->task;
|
---|
3923 |
|
---|
3924 | e.iop->task = XOTHER;
|
---|
3925 | while ((c = subgetc('"', 0)) != 0 && c != '}' && c != '\n')
|
---|
3926 | if (e.linep < elinep)
|
---|
3927 | *e.linep++ = c;
|
---|
3928 | if (oiop == e.iop)
|
---|
3929 | e.iop->task = otask;
|
---|
3930 | if (c != '}') {
|
---|
3931 | err("unclosed ${");
|
---|
3932 | gflg++;
|
---|
3933 | return c;
|
---|
3934 | }
|
---|
3935 | }
|
---|
3936 | if (e.linep >= elinep) {
|
---|
3937 | err("string in ${} too long");
|
---|
3938 | gflg++;
|
---|
3939 | e.linep -= 10;
|
---|
3940 | }
|
---|
3941 | *e.linep = 0;
|
---|
3942 | if (*s)
|
---|
3943 | for (cp = s + 1; *cp; cp++)
|
---|
3944 | if (any(*cp, "=-+?")) {
|
---|
3945 | c = *cp;
|
---|
3946 | *cp++ = 0;
|
---|
3947 | break;
|
---|
3948 | }
|
---|
3949 | if (s[1] == 0 && (*s == '*' || *s == '@')) {
|
---|
3950 | if (dolc > 1) {
|
---|
3951 | /* currently this does not distinguish $* and $@ */
|
---|
3952 | /* should check dollar */
|
---|
3953 | e.linep = s;
|
---|
3954 | PUSHIO(awordlist, dolv + 1, dolchar);
|
---|
3955 | return 0;
|
---|
3956 | } else { /* trap the nasty ${=} */
|
---|
3957 | s[0] = '1';
|
---|
3958 | s[1] = '\0';
|
---|
3959 | }
|
---|
3960 | }
|
---|
3961 | vp = lookup(s);
|
---|
3962 | dolp = vp->value;
|
---|
3963 | if (dolp == null) {
|
---|
3964 | switch (c) {
|
---|
3965 | case '=':
|
---|
3966 | if (isdigit(*s)) {
|
---|
3967 | err("cannot use ${...=...} with $n");
|
---|
3968 | gflg++;
|
---|
3969 | break;
|
---|
3970 | }
|
---|
3971 | setval(vp, cp);
|
---|
3972 | dolp = vp->value;
|
---|
3973 | break;
|
---|
3974 |
|
---|
3975 | case '-':
|
---|
3976 | dolp = strsave(cp, areanum);
|
---|
3977 | break;
|
---|
3978 |
|
---|
3979 | case '?':
|
---|
3980 | if (*cp == 0) {
|
---|
3981 | prs("missing value for ");
|
---|
3982 | err(s);
|
---|
3983 | } else
|
---|
3984 | err(cp);
|
---|
3985 | gflg++;
|
---|
3986 | break;
|
---|
3987 | }
|
---|
3988 | } else if (c == '+')
|
---|
3989 | dolp = strsave(cp, areanum);
|
---|
3990 | if (FLAG['u'] && dolp == null) {
|
---|
3991 | prs("unset variable: ");
|
---|
3992 | err(s);
|
---|
3993 | gflg++;
|
---|
3994 | }
|
---|
3995 | e.linep = s;
|
---|
3996 | PUSHIO(aword, dolp, quoted ? qstrchar : strchar);
|
---|
3997 | return 0;
|
---|
3998 | }
|
---|
3999 |
|
---|
4000 | /*
|
---|
4001 | * Run the command in `...` and read its output.
|
---|
4002 | */
|
---|
4003 |
|
---|
4004 | static int grave(int quoted)
|
---|
4005 | {
|
---|
4006 | /* moved to G: static char child_cmd[LINELIM]; */
|
---|
4007 |
|
---|
4008 | const char *cp;
|
---|
4009 | int i;
|
---|
4010 | int j;
|
---|
4011 | int pf[2];
|
---|
4012 | const char *src;
|
---|
4013 | char *dest;
|
---|
4014 | int count;
|
---|
4015 | int ignore;
|
---|
4016 | int ignore_once;
|
---|
4017 | char *argument_list[4];
|
---|
4018 | struct wdblock *wb = NULL;
|
---|
4019 |
|
---|
4020 | #if __GNUC__
|
---|
4021 | /* Avoid longjmp clobbering */
|
---|
4022 | (void) &cp;
|
---|
4023 | #endif
|
---|
4024 |
|
---|
4025 | for (cp = e.iop->argp->aword; *cp != '`'; cp++) {
|
---|
4026 | if (*cp == 0) {
|
---|
4027 | err("no closing `");
|
---|
4028 | return 0;
|
---|
4029 | }
|
---|
4030 | }
|
---|
4031 |
|
---|
4032 | /* string copy with dollar expansion */
|
---|
4033 | src = e.iop->argp->aword;
|
---|
4034 | dest = child_cmd;
|
---|
4035 | count = 0;
|
---|
4036 | ignore = 0;
|
---|
4037 | ignore_once = 0;
|
---|
4038 | while ((*src != '`') && (count < LINELIM)) {
|
---|
4039 | if (*src == '\'')
|
---|
4040 | ignore = !ignore;
|
---|
4041 | if (*src == '\\')
|
---|
4042 | ignore_once = 1;
|
---|
4043 | if (*src == '$' && !ignore && !ignore_once) {
|
---|
4044 | struct var *vp;
|
---|
4045 | char var_name[LINELIM];
|
---|
4046 | char alt_value[LINELIM];
|
---|
4047 | int var_index = 0;
|
---|
4048 | int alt_index = 0;
|
---|
4049 | char operator = 0;
|
---|
4050 | int braces = 0;
|
---|
4051 | char *value;
|
---|
4052 |
|
---|
4053 | src++;
|
---|
4054 | if (*src == '{') {
|
---|
4055 | braces = 1;
|
---|
4056 | src++;
|
---|
4057 | }
|
---|
4058 |
|
---|
4059 | var_name[var_index++] = *src++;
|
---|
4060 | while (isalnum(*src) || *src=='_')
|
---|
4061 | var_name[var_index++] = *src++;
|
---|
4062 | var_name[var_index] = 0;
|
---|
4063 |
|
---|
4064 | if (braces) {
|
---|
4065 | switch (*src) {
|
---|
4066 | case '}':
|
---|
4067 | break;
|
---|
4068 | case '-':
|
---|
4069 | case '=':
|
---|
4070 | case '+':
|
---|
4071 | case '?':
|
---|
4072 | operator = * src;
|
---|
4073 | break;
|
---|
4074 | default:
|
---|
4075 | err("unclosed ${\n");
|
---|
4076 | return 0;
|
---|
4077 | }
|
---|
4078 | if (operator) {
|
---|
4079 | src++;
|
---|
4080 | while (*src && (*src != '}')) {
|
---|
4081 | alt_value[alt_index++] = *src++;
|
---|
4082 | }
|
---|
4083 | alt_value[alt_index] = 0;
|
---|
4084 | if (*src != '}') {
|
---|
4085 | err("unclosed ${\n");
|
---|
4086 | return 0;
|
---|
4087 | }
|
---|
4088 | }
|
---|
4089 | src++;
|
---|
4090 | }
|
---|
4091 |
|
---|
4092 | if (isalpha(*var_name)) {
|
---|
4093 | /* let subshell handle it instead */
|
---|
4094 |
|
---|
4095 | char *namep = var_name;
|
---|
4096 |
|
---|
4097 | *dest++ = '$';
|
---|
4098 | if (braces)
|
---|
4099 | *dest++ = '{';
|
---|
4100 | while (*namep)
|
---|
4101 | *dest++ = *namep++;
|
---|
4102 | if (operator) {
|
---|
4103 | char *altp = alt_value;
|
---|
4104 | *dest++ = operator;
|
---|
4105 | while (*altp)
|
---|
4106 | *dest++ = *altp++;
|
---|
4107 | }
|
---|
4108 | if (braces)
|
---|
4109 | *dest++ = '}';
|
---|
4110 |
|
---|
4111 | wb = addword(lookup(var_name)->name, wb);
|
---|
4112 | } else {
|
---|
4113 | /* expand */
|
---|
4114 |
|
---|
4115 | vp = lookup(var_name);
|
---|
4116 | if (vp->value != null)
|
---|
4117 | value = (operator == '+') ?
|
---|
4118 | alt_value : vp->value;
|
---|
4119 | else if (operator == '?') {
|
---|
4120 | err(alt_value);
|
---|
4121 | return 0;
|
---|
4122 | } else if (alt_index && (operator != '+')) {
|
---|
4123 | value = alt_value;
|
---|
4124 | if (operator == '=')
|
---|
4125 | setval(vp, value);
|
---|
4126 | } else
|
---|
4127 | continue;
|
---|
4128 |
|
---|
4129 | while (*value && (count < LINELIM)) {
|
---|
4130 | *dest++ = *value++;
|
---|
4131 | count++;
|
---|
4132 | }
|
---|
4133 | }
|
---|
4134 | } else {
|
---|
4135 | *dest++ = *src++;
|
---|
4136 | count++;
|
---|
4137 | ignore_once = 0;
|
---|
4138 | }
|
---|
4139 | }
|
---|
4140 | *dest = '\0';
|
---|
4141 |
|
---|
4142 | if (openpipe(pf) < 0)
|
---|
4143 | return 0;
|
---|
4144 |
|
---|
4145 | while ((i = vfork()) == -1 && errno == EAGAIN);
|
---|
4146 |
|
---|
4147 | DBGPRINTF3(("GRAVE: i is %p\n", io));
|
---|
4148 |
|
---|
4149 | if (i < 0) {
|
---|
4150 | closepipe(pf);
|
---|
4151 | err((char *) bb_msg_memory_exhausted);
|
---|
4152 | return 0;
|
---|
4153 | }
|
---|
4154 | if (i != 0) {
|
---|
4155 | waitpid(i, NULL, 0);
|
---|
4156 | e.iop->argp->aword = ++cp;
|
---|
4157 | close(pf[1]);
|
---|
4158 | PUSHIO(afile, remap(pf[0]),
|
---|
4159 | (int (*)(struct ioarg *)) ((quoted) ? qgravechar : gravechar));
|
---|
4160 | return 1;
|
---|
4161 | }
|
---|
4162 | /* allow trapped signals */
|
---|
4163 | /* XXX - Maybe this signal stuff should go as well? */
|
---|
4164 | for (j = 0; j <= _NSIG; j++)
|
---|
4165 | if (ourtrap[j] && signal(j, SIG_IGN) != SIG_IGN)
|
---|
4166 | signal(j, SIG_DFL);
|
---|
4167 |
|
---|
4168 | /* Testcase where below checks are needed:
|
---|
4169 | * close stdout & run this script:
|
---|
4170 | * files=`ls`
|
---|
4171 | * echo "$files" >zz
|
---|
4172 | */
|
---|
4173 | xmove_fd(pf[1], 1);
|
---|
4174 | if (pf[0] != 1) close(pf[0]);
|
---|
4175 |
|
---|
4176 | argument_list[0] = (char *) DEFAULT_SHELL;
|
---|
4177 | argument_list[1] = (char *) "-c";
|
---|
4178 | argument_list[2] = child_cmd;
|
---|
4179 | argument_list[3] = NULL;
|
---|
4180 |
|
---|
4181 | cp = rexecve(argument_list[0], argument_list, makenv(1, wb));
|
---|
4182 | prs(argument_list[0]);
|
---|
4183 | prs(": ");
|
---|
4184 | err(cp);
|
---|
4185 | _exit(1);
|
---|
4186 | }
|
---|
4187 |
|
---|
4188 |
|
---|
4189 | static char *unquote(char *as)
|
---|
4190 | {
|
---|
4191 | char *s;
|
---|
4192 |
|
---|
4193 | s = as;
|
---|
4194 | if (s != NULL)
|
---|
4195 | while (*s)
|
---|
4196 | *s++ &= ~QUOTE;
|
---|
4197 | return as;
|
---|
4198 | }
|
---|
4199 |
|
---|
4200 | /* -------- glob.c -------- */
|
---|
4201 |
|
---|
4202 | /*
|
---|
4203 | * glob
|
---|
4204 | */
|
---|
4205 |
|
---|
4206 | #define scopy(x) strsave((x), areanum)
|
---|
4207 | #define BLKSIZ 512
|
---|
4208 | #define NDENT ((BLKSIZ+sizeof(struct dirent)-1)/sizeof(struct dirent))
|
---|
4209 |
|
---|
4210 | static struct wdblock *cl, *nl;
|
---|
4211 | static const char spcl[] ALIGN1= "[?*";
|
---|
4212 |
|
---|
4213 | static struct wdblock *glob(char *cp, struct wdblock *wb)
|
---|
4214 | {
|
---|
4215 | int i;
|
---|
4216 | char *pp;
|
---|
4217 |
|
---|
4218 | if (cp == 0)
|
---|
4219 | return wb;
|
---|
4220 | i = 0;
|
---|
4221 | for (pp = cp; *pp; pp++)
|
---|
4222 | if (any(*pp, spcl))
|
---|
4223 | i++;
|
---|
4224 | else if (!any(*pp & ~QUOTE, spcl))
|
---|
4225 | *pp &= ~QUOTE;
|
---|
4226 | if (i != 0) {
|
---|
4227 | for (cl = addword(scopy(cp), NULL); anyspcl(cl); cl = nl) {
|
---|
4228 | nl = newword(cl->w_nword * 2);
|
---|
4229 | for (i = 0; i < cl->w_nword; i++) { /* for each argument */
|
---|
4230 | for (pp = cl->w_words[i]; *pp; pp++)
|
---|
4231 | if (any(*pp, spcl)) {
|
---|
4232 | globname(cl->w_words[i], pp);
|
---|
4233 | break;
|
---|
4234 | }
|
---|
4235 | if (*pp == '\0')
|
---|
4236 | nl = addword(scopy(cl->w_words[i]), nl);
|
---|
4237 | }
|
---|
4238 | for (i = 0; i < cl->w_nword; i++)
|
---|
4239 | DELETE(cl->w_words[i]);
|
---|
4240 | DELETE(cl);
|
---|
4241 | }
|
---|
4242 | for (i = 0; i < cl->w_nword; i++)
|
---|
4243 | unquote(cl->w_words[i]);
|
---|
4244 | glob0((char *) cl->w_words, cl->w_nword, sizeof(char *), xstrcmp);
|
---|
4245 | if (cl->w_nword) {
|
---|
4246 | for (i = 0; i < cl->w_nword; i++)
|
---|
4247 | wb = addword(cl->w_words[i], wb);
|
---|
4248 | DELETE(cl);
|
---|
4249 | return wb;
|
---|
4250 | }
|
---|
4251 | }
|
---|
4252 | wb = addword(unquote(cp), wb);
|
---|
4253 | return wb;
|
---|
4254 | }
|
---|
4255 |
|
---|
4256 | static void globname(char *we, char *pp)
|
---|
4257 | {
|
---|
4258 | char *np, *cp;
|
---|
4259 | char *name, *gp, *dp;
|
---|
4260 | int k;
|
---|
4261 | DIR *dirp;
|
---|
4262 | struct dirent *de;
|
---|
4263 | char dname[NAME_MAX + 1];
|
---|
4264 | struct stat dbuf;
|
---|
4265 |
|
---|
4266 | for (np = we; np != pp; pp--)
|
---|
4267 | if (pp[-1] == '/')
|
---|
4268 | break;
|
---|
4269 | for (dp = cp = space((int) (pp - np) + 3); np < pp;)
|
---|
4270 | *cp++ = *np++;
|
---|
4271 | *cp++ = '.';
|
---|
4272 | *cp = '\0';
|
---|
4273 | for (gp = cp = space(strlen(pp) + 1); *np && *np != '/';)
|
---|
4274 | *cp++ = *np++;
|
---|
4275 | *cp = '\0';
|
---|
4276 | dirp = opendir(dp);
|
---|
4277 | if (dirp == 0) {
|
---|
4278 | DELETE(dp);
|
---|
4279 | DELETE(gp);
|
---|
4280 | return;
|
---|
4281 | }
|
---|
4282 | dname[NAME_MAX] = '\0';
|
---|
4283 | while ((de = readdir(dirp)) != NULL) {
|
---|
4284 | /* XXX Hmmm... What this could be? (abial) */
|
---|
4285 | /*
|
---|
4286 | if (ent[j].d_ino == 0)
|
---|
4287 | continue;
|
---|
4288 | */
|
---|
4289 | strncpy(dname, de->d_name, NAME_MAX);
|
---|
4290 | if (dname[0] == '.')
|
---|
4291 | if (*gp != '.')
|
---|
4292 | continue;
|
---|
4293 | for (k = 0; k < NAME_MAX; k++)
|
---|
4294 | if (any(dname[k], spcl))
|
---|
4295 | dname[k] |= QUOTE;
|
---|
4296 | if (gmatch(dname, gp)) {
|
---|
4297 | name = generate(we, pp, dname, np);
|
---|
4298 | if (*np && !anys(np, spcl)) {
|
---|
4299 | if (stat(name, &dbuf)) {
|
---|
4300 | DELETE(name);
|
---|
4301 | continue;
|
---|
4302 | }
|
---|
4303 | }
|
---|
4304 | nl = addword(name, nl);
|
---|
4305 | }
|
---|
4306 | }
|
---|
4307 | closedir(dirp);
|
---|
4308 | DELETE(dp);
|
---|
4309 | DELETE(gp);
|
---|
4310 | }
|
---|
4311 |
|
---|
4312 | /*
|
---|
4313 | * generate a pathname as below.
|
---|
4314 | * start..end1 / middle end
|
---|
4315 | * the slashes come for free
|
---|
4316 | */
|
---|
4317 | static char *generate(char *start1, char *end1, char *middle, char *end)
|
---|
4318 | {
|
---|
4319 | char *p;
|
---|
4320 | char *op, *xp;
|
---|
4321 |
|
---|
4322 | p = op = space((int)(end1 - start1) + strlen(middle) + strlen(end) + 2);
|
---|
4323 | for (xp = start1; xp != end1;)
|
---|
4324 | *op++ = *xp++;
|
---|
4325 | for (xp = middle; (*op++ = *xp++) != '\0';);
|
---|
4326 | op--;
|
---|
4327 | for (xp = end; (*op++ = *xp++) != '\0';);
|
---|
4328 | return p;
|
---|
4329 | }
|
---|
4330 |
|
---|
4331 | static int anyspcl(struct wdblock *wb)
|
---|
4332 | {
|
---|
4333 | int i;
|
---|
4334 | char **wd;
|
---|
4335 |
|
---|
4336 | wd = wb->w_words;
|
---|
4337 | for (i = 0; i < wb->w_nword; i++)
|
---|
4338 | if (anys(spcl, *wd++))
|
---|
4339 | return 1;
|
---|
4340 | return 0;
|
---|
4341 | }
|
---|
4342 |
|
---|
4343 | static int xstrcmp(char *p1, char *p2)
|
---|
4344 | {
|
---|
4345 | return strcmp(*(char **) p1, *(char **) p2);
|
---|
4346 | }
|
---|
4347 |
|
---|
4348 |
|
---|
4349 | /* -------- word.c -------- */
|
---|
4350 |
|
---|
4351 | static struct wdblock *newword(int nw)
|
---|
4352 | {
|
---|
4353 | struct wdblock *wb;
|
---|
4354 |
|
---|
4355 | wb = (struct wdblock *) space(sizeof(*wb) + nw * sizeof(char *));
|
---|
4356 | wb->w_bsize = nw;
|
---|
4357 | wb->w_nword = 0;
|
---|
4358 | return wb;
|
---|
4359 | }
|
---|
4360 |
|
---|
4361 | static struct wdblock *addword(char *wd, struct wdblock *wb)
|
---|
4362 | {
|
---|
4363 | struct wdblock *wb2;
|
---|
4364 | int nw;
|
---|
4365 |
|
---|
4366 | if (wb == NULL)
|
---|
4367 | wb = newword(NSTART);
|
---|
4368 | nw = wb->w_nword;
|
---|
4369 | if (nw >= wb->w_bsize) {
|
---|
4370 | wb2 = newword(nw * 2);
|
---|
4371 | memcpy((char *) wb2->w_words, (char *) wb->w_words,
|
---|
4372 | nw * sizeof(char *));
|
---|
4373 | wb2->w_nword = nw;
|
---|
4374 | DELETE(wb);
|
---|
4375 | wb = wb2;
|
---|
4376 | }
|
---|
4377 | wb->w_words[wb->w_nword++] = wd;
|
---|
4378 | return wb;
|
---|
4379 | }
|
---|
4380 |
|
---|
4381 | static char **getwords(struct wdblock *wb)
|
---|
4382 | {
|
---|
4383 | char **wd;
|
---|
4384 | int nb;
|
---|
4385 |
|
---|
4386 | if (wb == NULL)
|
---|
4387 | return NULL;
|
---|
4388 | if (wb->w_nword == 0) {
|
---|
4389 | DELETE(wb);
|
---|
4390 | return NULL;
|
---|
4391 | }
|
---|
4392 | wd = (char **) space(nb = sizeof(*wd) * wb->w_nword);
|
---|
4393 | memcpy((char *) wd, (char *) wb->w_words, nb);
|
---|
4394 | DELETE(wb); /* perhaps should done by caller */
|
---|
4395 | return wd;
|
---|
4396 | }
|
---|
4397 |
|
---|
4398 | static int (*func) (char *, char *);
|
---|
4399 | static int globv;
|
---|
4400 |
|
---|
4401 | static void glob3(char *i, char *j, char *k)
|
---|
4402 | {
|
---|
4403 | char *index1, *index2, *index3;
|
---|
4404 | int c;
|
---|
4405 | int m;
|
---|
4406 |
|
---|
4407 | m = globv;
|
---|
4408 | index1 = i;
|
---|
4409 | index2 = j;
|
---|
4410 | index3 = k;
|
---|
4411 | do {
|
---|
4412 | c = *index1;
|
---|
4413 | *index1++ = *index3;
|
---|
4414 | *index3++ = *index2;
|
---|
4415 | *index2++ = c;
|
---|
4416 | } while (--m);
|
---|
4417 | }
|
---|
4418 |
|
---|
4419 | static void glob2(char *i, char *j)
|
---|
4420 | {
|
---|
4421 | char *index1, *index2, c;
|
---|
4422 | int m;
|
---|
4423 |
|
---|
4424 | m = globv;
|
---|
4425 | index1 = i;
|
---|
4426 | index2 = j;
|
---|
4427 | do {
|
---|
4428 | c = *index1;
|
---|
4429 | *index1++ = *index2;
|
---|
4430 | *index2++ = c;
|
---|
4431 | } while (--m);
|
---|
4432 | }
|
---|
4433 |
|
---|
4434 | static void glob1(char *base, char *lim)
|
---|
4435 | {
|
---|
4436 | char *i, *j;
|
---|
4437 | int v2;
|
---|
4438 | char *lptr, *hptr;
|
---|
4439 | int c;
|
---|
4440 | unsigned n;
|
---|
4441 |
|
---|
4442 | v2 = globv;
|
---|
4443 |
|
---|
4444 | top:
|
---|
4445 | n = (int) (lim - base);
|
---|
4446 | if (n <= v2)
|
---|
4447 | return;
|
---|
4448 | n = v2 * (n / (2 * v2));
|
---|
4449 | hptr = lptr = base + n;
|
---|
4450 | i = base;
|
---|
4451 | j = lim - v2;
|
---|
4452 | for (;;) {
|
---|
4453 | if (i < lptr) {
|
---|
4454 | c = (*func) (i, lptr);
|
---|
4455 | if (c == 0) {
|
---|
4456 | lptr -= v2;
|
---|
4457 | glob2(i, lptr);
|
---|
4458 | continue;
|
---|
4459 | }
|
---|
4460 | if (c < 0) {
|
---|
4461 | i += v2;
|
---|
4462 | continue;
|
---|
4463 | }
|
---|
4464 | }
|
---|
4465 |
|
---|
4466 | begin:
|
---|
4467 | if (j > hptr) {
|
---|
4468 | c = (*func) (hptr, j);
|
---|
4469 | if (c == 0) {
|
---|
4470 | hptr += v2;
|
---|
4471 | glob2(hptr, j);
|
---|
4472 | goto begin;
|
---|
4473 | }
|
---|
4474 | if (c > 0) {
|
---|
4475 | if (i == lptr) {
|
---|
4476 | hptr += v2;
|
---|
4477 | glob3(i, hptr, j);
|
---|
4478 | i = (lptr += v2);
|
---|
4479 | goto begin;
|
---|
4480 | }
|
---|
4481 | glob2(i, j);
|
---|
4482 | j -= v2;
|
---|
4483 | i += v2;
|
---|
4484 | continue;
|
---|
4485 | }
|
---|
4486 | j -= v2;
|
---|
4487 | goto begin;
|
---|
4488 | }
|
---|
4489 |
|
---|
4490 |
|
---|
4491 | if (i == lptr) {
|
---|
4492 | if (lptr - base >= lim - hptr) {
|
---|
4493 | glob1(hptr + v2, lim);
|
---|
4494 | lim = lptr;
|
---|
4495 | } else {
|
---|
4496 | glob1(base, lptr);
|
---|
4497 | base = hptr + v2;
|
---|
4498 | }
|
---|
4499 | goto top;
|
---|
4500 | }
|
---|
4501 |
|
---|
4502 | lptr -= v2;
|
---|
4503 | glob3(j, lptr, i);
|
---|
4504 | j = (hptr -= v2);
|
---|
4505 | }
|
---|
4506 | }
|
---|
4507 |
|
---|
4508 | static void glob0(char *a0, unsigned a1, int a2, int (*a3) (char *, char *))
|
---|
4509 | {
|
---|
4510 | func = a3;
|
---|
4511 | globv = a2;
|
---|
4512 | glob1(a0, a0 + a1 * a2);
|
---|
4513 | }
|
---|
4514 |
|
---|
4515 |
|
---|
4516 | /* -------- io.c -------- */
|
---|
4517 |
|
---|
4518 | /*
|
---|
4519 | * shell IO
|
---|
4520 | */
|
---|
4521 |
|
---|
4522 | static int my_getc(int ec)
|
---|
4523 | {
|
---|
4524 | int c;
|
---|
4525 |
|
---|
4526 | if (e.linep > elinep) {
|
---|
4527 | while ((c = readc()) != '\n' && c);
|
---|
4528 | err("input line too long");
|
---|
4529 | gflg++;
|
---|
4530 | return c;
|
---|
4531 | }
|
---|
4532 | c = readc();
|
---|
4533 | if ((ec != '\'') && (ec != '`') && (e.iop->task != XGRAVE)) {
|
---|
4534 | if (c == '\\') {
|
---|
4535 | c = readc();
|
---|
4536 | if (c == '\n' && ec != '\"')
|
---|
4537 | return my_getc(ec);
|
---|
4538 | c |= QUOTE;
|
---|
4539 | }
|
---|
4540 | }
|
---|
4541 | return c;
|
---|
4542 | }
|
---|
4543 |
|
---|
4544 | static void unget(int c)
|
---|
4545 | {
|
---|
4546 | if (e.iop >= e.iobase)
|
---|
4547 | e.iop->peekc = c;
|
---|
4548 | }
|
---|
4549 |
|
---|
4550 | static int eofc(void)
|
---|
4551 | {
|
---|
4552 | return e.iop < e.iobase || (e.iop->peekc == 0 && e.iop->prev == 0);
|
---|
4553 | }
|
---|
4554 |
|
---|
4555 | static int readc(void)
|
---|
4556 | {
|
---|
4557 | int c;
|
---|
4558 |
|
---|
4559 | RCPRINTF(("READC: e.iop %p, e.iobase %p\n", e.iop, e.iobase));
|
---|
4560 |
|
---|
4561 | for (; e.iop >= e.iobase; e.iop--) {
|
---|
4562 | RCPRINTF(("READC: e.iop %p, peekc 0x%x\n", e.iop, e.iop->peekc));
|
---|
4563 | c = e.iop->peekc;
|
---|
4564 | if (c != '\0') {
|
---|
4565 | e.iop->peekc = 0;
|
---|
4566 | return c;
|
---|
4567 | }
|
---|
4568 | if (e.iop->prev != 0) {
|
---|
4569 | c = (*e.iop->iofn)(e.iop->argp, e.iop);
|
---|
4570 | if (c != '\0') {
|
---|
4571 | if (c == -1) {
|
---|
4572 | e.iop++;
|
---|
4573 | continue;
|
---|
4574 | }
|
---|
4575 | if (e.iop == iostack)
|
---|
4576 | ioecho(c);
|
---|
4577 | e.iop->prev = c;
|
---|
4578 | return e.iop->prev;
|
---|
4579 | }
|
---|
4580 | if (e.iop->task == XIO && e.iop->prev != '\n') {
|
---|
4581 | e.iop->prev = 0;
|
---|
4582 | if (e.iop == iostack)
|
---|
4583 | ioecho('\n');
|
---|
4584 | return '\n';
|
---|
4585 | }
|
---|
4586 | }
|
---|
4587 | if (e.iop->task == XIO) {
|
---|
4588 | if (multiline) {
|
---|
4589 | e.iop->prev = 0;
|
---|
4590 | return e.iop->prev;
|
---|
4591 | }
|
---|
4592 | if (interactive && e.iop == iostack + 1) {
|
---|
4593 | #if ENABLE_FEATURE_EDITING
|
---|
4594 | current_prompt = prompt->value;
|
---|
4595 | #else
|
---|
4596 | prs(prompt->value);
|
---|
4597 | #endif
|
---|
4598 | }
|
---|
4599 | }
|
---|
4600 | } /* FOR */
|
---|
4601 |
|
---|
4602 | if (e.iop >= iostack) {
|
---|
4603 | RCPRINTF(("READC: return 0, e.iop %p\n", e.iop));
|
---|
4604 | return 0;
|
---|
4605 | }
|
---|
4606 |
|
---|
4607 | DBGPRINTF(("READC: leave()...\n"));
|
---|
4608 | leave();
|
---|
4609 |
|
---|
4610 | /* NOTREACHED */
|
---|
4611 | return 0;
|
---|
4612 | }
|
---|
4613 |
|
---|
4614 | static void ioecho(char c)
|
---|
4615 | {
|
---|
4616 | if (FLAG['v'])
|
---|
4617 | write(2, &c, sizeof c);
|
---|
4618 | }
|
---|
4619 |
|
---|
4620 |
|
---|
4621 | static void pushio(struct ioarg *argp, int (*fn) (struct ioarg *))
|
---|
4622 | {
|
---|
4623 | DBGPRINTF(("PUSHIO: argp %p, argp->afid 0x%x, e.iop %p\n", argp,
|
---|
4624 | argp->afid, e.iop));
|
---|
4625 |
|
---|
4626 | /* Set env ptr for io source to next array spot and check for array overflow */
|
---|
4627 | if (++e.iop >= &iostack[NPUSH]) {
|
---|
4628 | e.iop--;
|
---|
4629 | err("Shell input nested too deeply");
|
---|
4630 | gflg++;
|
---|
4631 | return;
|
---|
4632 | }
|
---|
4633 |
|
---|
4634 | /* We did not overflow the NPUSH array spots so setup data structs */
|
---|
4635 |
|
---|
4636 | e.iop->iofn = (int (*)(struct ioarg *, struct io *)) fn; /* Store data source func ptr */
|
---|
4637 |
|
---|
4638 | if (argp->afid != AFID_NOBUF)
|
---|
4639 | e.iop->argp = argp;
|
---|
4640 | else {
|
---|
4641 |
|
---|
4642 | e.iop->argp = ioargstack + (e.iop - iostack); /* MAL - index into stack */
|
---|
4643 | *e.iop->argp = *argp; /* copy data from temp area into stack spot */
|
---|
4644 |
|
---|
4645 | /* MAL - mainbuf is for 1st data source (command line?) and all nested use a single shared buffer? */
|
---|
4646 |
|
---|
4647 | if (e.iop == &iostack[0])
|
---|
4648 | e.iop->argp->afbuf = &mainbuf;
|
---|
4649 | else
|
---|
4650 | e.iop->argp->afbuf = &sharedbuf;
|
---|
4651 |
|
---|
4652 | /* MAL - if not a termimal AND (commandline OR readable file) then give it a buffer id? */
|
---|
4653 | /* This line appears to be active when running scripts from command line */
|
---|
4654 | if ((isatty(e.iop->argp->afile) == 0)
|
---|
4655 | && (e.iop == &iostack[0]
|
---|
4656 | || lseek(e.iop->argp->afile, 0L, SEEK_CUR) != -1)) {
|
---|
4657 | if (++bufid == AFID_NOBUF) /* counter rollover check, AFID_NOBUF = 11111111 */
|
---|
4658 | bufid = AFID_ID; /* AFID_ID = 0 */
|
---|
4659 |
|
---|
4660 | e.iop->argp->afid = bufid; /* assign buffer id */
|
---|
4661 | }
|
---|
4662 |
|
---|
4663 | DBGPRINTF(("PUSHIO: iostack %p, e.iop %p, afbuf %p\n",
|
---|
4664 | iostack, e.iop, e.iop->argp->afbuf));
|
---|
4665 | DBGPRINTF(("PUSHIO: mbuf %p, sbuf %p, bid %d, e.iop %p\n",
|
---|
4666 | &mainbuf, &sharedbuf, bufid, e.iop));
|
---|
4667 |
|
---|
4668 | }
|
---|
4669 |
|
---|
4670 | e.iop->prev = ~'\n';
|
---|
4671 | e.iop->peekc = 0;
|
---|
4672 | e.iop->xchar = 0;
|
---|
4673 | e.iop->nlcount = 0;
|
---|
4674 |
|
---|
4675 | if (fn == filechar || fn == linechar)
|
---|
4676 | e.iop->task = XIO;
|
---|
4677 | else if (fn == (int (*)(struct ioarg *)) gravechar
|
---|
4678 | || fn == (int (*)(struct ioarg *)) qgravechar)
|
---|
4679 | e.iop->task = XGRAVE;
|
---|
4680 | else
|
---|
4681 | e.iop->task = XOTHER;
|
---|
4682 | }
|
---|
4683 |
|
---|
4684 | static struct io *setbase(struct io *ip)
|
---|
4685 | {
|
---|
4686 | struct io *xp;
|
---|
4687 |
|
---|
4688 | xp = e.iobase;
|
---|
4689 | e.iobase = ip;
|
---|
4690 | return xp;
|
---|
4691 | }
|
---|
4692 |
|
---|
4693 | /*
|
---|
4694 | * Input generating functions
|
---|
4695 | */
|
---|
4696 |
|
---|
4697 | /*
|
---|
4698 | * Produce the characters of a string, then a newline, then EOF.
|
---|
4699 | */
|
---|
4700 | static int nlchar(struct ioarg *ap)
|
---|
4701 | {
|
---|
4702 | int c;
|
---|
4703 |
|
---|
4704 | if (ap->aword == NULL)
|
---|
4705 | return 0;
|
---|
4706 | c = *ap->aword++;
|
---|
4707 | if (c == 0) {
|
---|
4708 | ap->aword = NULL;
|
---|
4709 | return '\n';
|
---|
4710 | }
|
---|
4711 | return c;
|
---|
4712 | }
|
---|
4713 |
|
---|
4714 | /*
|
---|
4715 | * Given a list of words, produce the characters
|
---|
4716 | * in them, with a space after each word.
|
---|
4717 | */
|
---|
4718 | static int wdchar(struct ioarg *ap)
|
---|
4719 | {
|
---|
4720 | char c;
|
---|
4721 | char **wl;
|
---|
4722 |
|
---|
4723 | wl = ap->awordlist;
|
---|
4724 | if (wl == NULL)
|
---|
4725 | return 0;
|
---|
4726 | if (*wl != NULL) {
|
---|
4727 | c = *(*wl)++;
|
---|
4728 | if (c != 0)
|
---|
4729 | return c & 0177;
|
---|
4730 | ap->awordlist++;
|
---|
4731 | return ' ';
|
---|
4732 | }
|
---|
4733 | ap->awordlist = NULL;
|
---|
4734 | return '\n';
|
---|
4735 | }
|
---|
4736 |
|
---|
4737 | /*
|
---|
4738 | * Return the characters of a list of words,
|
---|
4739 | * producing a space between them.
|
---|
4740 | */
|
---|
4741 | static int dolchar(struct ioarg *ap)
|
---|
4742 | {
|
---|
4743 | char *wp;
|
---|
4744 |
|
---|
4745 | wp = *ap->awordlist++;
|
---|
4746 | if (wp != NULL) {
|
---|
4747 | PUSHIO(aword, wp, *ap->awordlist == NULL ? strchar : xxchar);
|
---|
4748 | return -1;
|
---|
4749 | }
|
---|
4750 | return 0;
|
---|
4751 | }
|
---|
4752 |
|
---|
4753 | static int xxchar(struct ioarg *ap)
|
---|
4754 | {
|
---|
4755 | int c;
|
---|
4756 |
|
---|
4757 | if (ap->aword == NULL)
|
---|
4758 | return 0;
|
---|
4759 | c = *ap->aword++;
|
---|
4760 | if (c == '\0') {
|
---|
4761 | ap->aword = NULL;
|
---|
4762 | return ' ';
|
---|
4763 | }
|
---|
4764 | return c;
|
---|
4765 | }
|
---|
4766 |
|
---|
4767 | /*
|
---|
4768 | * Produce the characters from a single word (string).
|
---|
4769 | */
|
---|
4770 | static int strchar(struct ioarg *ap)
|
---|
4771 | {
|
---|
4772 | if (ap->aword == NULL)
|
---|
4773 | return 0;
|
---|
4774 | return *ap->aword++;
|
---|
4775 | }
|
---|
4776 |
|
---|
4777 | /*
|
---|
4778 | * Produce quoted characters from a single word (string).
|
---|
4779 | */
|
---|
4780 | static int qstrchar(struct ioarg *ap)
|
---|
4781 | {
|
---|
4782 | int c;
|
---|
4783 |
|
---|
4784 | if (ap->aword == NULL)
|
---|
4785 | return 0;
|
---|
4786 | c = *ap->aword++;
|
---|
4787 | if (c)
|
---|
4788 | c |= QUOTE;
|
---|
4789 | return c;
|
---|
4790 | }
|
---|
4791 |
|
---|
4792 | /*
|
---|
4793 | * Return the characters from a file.
|
---|
4794 | */
|
---|
4795 | static int filechar(struct ioarg *ap)
|
---|
4796 | {
|
---|
4797 | int i;
|
---|
4798 | char c;
|
---|
4799 | struct iobuf *bp = ap->afbuf;
|
---|
4800 |
|
---|
4801 | if (ap->afid != AFID_NOBUF) {
|
---|
4802 | i = (ap->afid != bp->id);
|
---|
4803 | if (i || bp->bufp == bp->ebufp) {
|
---|
4804 | if (i)
|
---|
4805 | lseek(ap->afile, ap->afpos, SEEK_SET);
|
---|
4806 |
|
---|
4807 | i = safe_read(ap->afile, bp->buf, sizeof(bp->buf));
|
---|
4808 | if (i <= 0) {
|
---|
4809 | closef(ap->afile);
|
---|
4810 | return 0;
|
---|
4811 | }
|
---|
4812 |
|
---|
4813 | bp->id = ap->afid;
|
---|
4814 | bp->bufp = bp->buf;
|
---|
4815 | bp->ebufp = bp->bufp + i;
|
---|
4816 | }
|
---|
4817 |
|
---|
4818 | ap->afpos++;
|
---|
4819 | return *bp->bufp++ & 0177;
|
---|
4820 | }
|
---|
4821 | #if ENABLE_FEATURE_EDITING
|
---|
4822 | if (interactive && isatty(ap->afile)) {
|
---|
4823 | /* moved to G: static char filechar_cmdbuf[BUFSIZ]; */
|
---|
4824 | static int position = 0, size = 0;
|
---|
4825 |
|
---|
4826 | while (size == 0 || position >= size) {
|
---|
4827 | read_line_input(current_prompt, filechar_cmdbuf, BUFSIZ, line_input_state);
|
---|
4828 | size = strlen(filechar_cmdbuf);
|
---|
4829 | position = 0;
|
---|
4830 | }
|
---|
4831 | c = filechar_cmdbuf[position];
|
---|
4832 | position++;
|
---|
4833 | return c;
|
---|
4834 | }
|
---|
4835 | #endif
|
---|
4836 | i = safe_read(ap->afile, &c, sizeof(c));
|
---|
4837 | return i == sizeof(c) ? (c & 0x7f) : (closef(ap->afile), 0);
|
---|
4838 | }
|
---|
4839 |
|
---|
4840 | /*
|
---|
4841 | * Return the characters from a here temp file.
|
---|
4842 | */
|
---|
4843 | static int herechar(struct ioarg *ap)
|
---|
4844 | {
|
---|
4845 | char c;
|
---|
4846 |
|
---|
4847 | if (read(ap->afile, &c, sizeof(c)) != sizeof(c)) {
|
---|
4848 | close(ap->afile);
|
---|
4849 | c = '\0';
|
---|
4850 | }
|
---|
4851 | return c;
|
---|
4852 | }
|
---|
4853 |
|
---|
4854 | /*
|
---|
4855 | * Return the characters produced by a process (`...`).
|
---|
4856 | * Quote them if required, and remove any trailing newline characters.
|
---|
4857 | */
|
---|
4858 | static int gravechar(struct ioarg *ap, struct io *iop)
|
---|
4859 | {
|
---|
4860 | int c;
|
---|
4861 |
|
---|
4862 | c = qgravechar(ap, iop) & ~QUOTE;
|
---|
4863 | if (c == '\n')
|
---|
4864 | c = ' ';
|
---|
4865 | return c;
|
---|
4866 | }
|
---|
4867 |
|
---|
4868 | static int qgravechar(struct ioarg *ap, struct io *iop)
|
---|
4869 | {
|
---|
4870 | int c;
|
---|
4871 |
|
---|
4872 | DBGPRINTF3(("QGRAVECHAR: enter, ap=%p, iop=%p\n", ap, iop));
|
---|
4873 |
|
---|
4874 | if (iop->xchar) {
|
---|
4875 | if (iop->nlcount) {
|
---|
4876 | iop->nlcount--;
|
---|
4877 | return '\n' | QUOTE;
|
---|
4878 | }
|
---|
4879 | c = iop->xchar;
|
---|
4880 | iop->xchar = 0;
|
---|
4881 | } else if ((c = filechar(ap)) == '\n') {
|
---|
4882 | iop->nlcount = 1;
|
---|
4883 | while ((c = filechar(ap)) == '\n')
|
---|
4884 | iop->nlcount++;
|
---|
4885 | iop->xchar = c;
|
---|
4886 | if (c == 0)
|
---|
4887 | return c;
|
---|
4888 | iop->nlcount--;
|
---|
4889 | c = '\n';
|
---|
4890 | }
|
---|
4891 | return c != 0 ? c | QUOTE : 0;
|
---|
4892 | }
|
---|
4893 |
|
---|
4894 | /*
|
---|
4895 | * Return a single command (usually the first line) from a file.
|
---|
4896 | */
|
---|
4897 | static int linechar(struct ioarg *ap)
|
---|
4898 | {
|
---|
4899 | int c;
|
---|
4900 |
|
---|
4901 | c = filechar(ap);
|
---|
4902 | if (c == '\n') {
|
---|
4903 | if (!multiline) {
|
---|
4904 | closef(ap->afile);
|
---|
4905 | ap->afile = -1; /* illegal value */
|
---|
4906 | }
|
---|
4907 | }
|
---|
4908 | return c;
|
---|
4909 | }
|
---|
4910 |
|
---|
4911 | /*
|
---|
4912 | * remap fd into Shell's fd space
|
---|
4913 | */
|
---|
4914 | static int remap(int fd)
|
---|
4915 | {
|
---|
4916 | int i;
|
---|
4917 | int map[NOFILE];
|
---|
4918 | int newfd;
|
---|
4919 |
|
---|
4920 | DBGPRINTF(("REMAP: fd=%d, e.iofd=%d\n", fd, e.iofd));
|
---|
4921 |
|
---|
4922 | if (fd < e.iofd) {
|
---|
4923 | for (i = 0; i < NOFILE; i++)
|
---|
4924 | map[i] = 0;
|
---|
4925 |
|
---|
4926 | do {
|
---|
4927 | map[fd] = 1;
|
---|
4928 | newfd = dup(fd);
|
---|
4929 | fd = newfd;
|
---|
4930 | } while (fd >= 0 && fd < e.iofd);
|
---|
4931 |
|
---|
4932 | for (i = 0; i < NOFILE; i++)
|
---|
4933 | if (map[i])
|
---|
4934 | close(i);
|
---|
4935 |
|
---|
4936 | if (fd < 0)
|
---|
4937 | err("too many files open in shell");
|
---|
4938 | }
|
---|
4939 |
|
---|
4940 | return fd;
|
---|
4941 | }
|
---|
4942 |
|
---|
4943 | static int openpipe(int *pv)
|
---|
4944 | {
|
---|
4945 | int i;
|
---|
4946 |
|
---|
4947 | i = pipe(pv);
|
---|
4948 | if (i < 0)
|
---|
4949 | err("can't create pipe - try again");
|
---|
4950 | return i;
|
---|
4951 | }
|
---|
4952 |
|
---|
4953 | static void closepipe(int *pv)
|
---|
4954 | {
|
---|
4955 | if (pv != NULL) {
|
---|
4956 | close(*pv++);
|
---|
4957 | close(*pv);
|
---|
4958 | }
|
---|
4959 | }
|
---|
4960 |
|
---|
4961 |
|
---|
4962 | /* -------- here.c -------- */
|
---|
4963 |
|
---|
4964 | /*
|
---|
4965 | * here documents
|
---|
4966 | */
|
---|
4967 |
|
---|
4968 | static void markhere(char *s, struct ioword *iop)
|
---|
4969 | {
|
---|
4970 | struct here *h, *lh;
|
---|
4971 |
|
---|
4972 | DBGPRINTF7(("MARKHERE: enter, s=%p\n", s));
|
---|
4973 |
|
---|
4974 | h = (struct here *) space(sizeof(struct here));
|
---|
4975 | if (h == NULL)
|
---|
4976 | return;
|
---|
4977 |
|
---|
4978 | h->h_tag = evalstr(s, DOSUB);
|
---|
4979 | if (h->h_tag == 0)
|
---|
4980 | return;
|
---|
4981 |
|
---|
4982 | h->h_iop = iop;
|
---|
4983 | iop->io_name = 0;
|
---|
4984 | h->h_next = NULL;
|
---|
4985 | if (inhere == 0)
|
---|
4986 | inhere = h;
|
---|
4987 | else {
|
---|
4988 | for (lh = inhere; lh != NULL; lh = lh->h_next) {
|
---|
4989 | if (lh->h_next == 0) {
|
---|
4990 | lh->h_next = h;
|
---|
4991 | break;
|
---|
4992 | }
|
---|
4993 | }
|
---|
4994 | }
|
---|
4995 | iop->io_flag |= IOHERE | IOXHERE;
|
---|
4996 | for (s = h->h_tag; *s; s++) {
|
---|
4997 | if (*s & QUOTE) {
|
---|
4998 | iop->io_flag &= ~IOXHERE;
|
---|
4999 | *s &= ~QUOTE;
|
---|
5000 | }
|
---|
5001 | }
|
---|
5002 | h->h_dosub = iop->io_flag & IOXHERE;
|
---|
5003 | }
|
---|
5004 |
|
---|
5005 | static void gethere(void)
|
---|
5006 | {
|
---|
5007 | struct here *h, *hp;
|
---|
5008 |
|
---|
5009 | DBGPRINTF7(("GETHERE: enter...\n"));
|
---|
5010 |
|
---|
5011 | /* Scan here files first leaving inhere list in place */
|
---|
5012 | for (hp = h = inhere; h != NULL; hp = h, h = h->h_next)
|
---|
5013 | readhere(&h->h_iop->io_name, h->h_tag, h->h_dosub ? 0 : '\'');
|
---|
5014 |
|
---|
5015 | /* Make inhere list active - keep list intact for scraphere */
|
---|
5016 | if (hp != NULL) {
|
---|
5017 | hp->h_next = acthere;
|
---|
5018 | acthere = inhere;
|
---|
5019 | inhere = NULL;
|
---|
5020 | }
|
---|
5021 | }
|
---|
5022 |
|
---|
5023 | static void readhere(char **name, char *s, int ec)
|
---|
5024 | {
|
---|
5025 | int tf;
|
---|
5026 | char tname[30] = ".msh_XXXXXX";
|
---|
5027 | int c;
|
---|
5028 | jmp_buf ev;
|
---|
5029 | char myline[LINELIM + 1];
|
---|
5030 | char *thenext;
|
---|
5031 |
|
---|
5032 | DBGPRINTF7(("READHERE: enter, name=%p, s=%p\n", name, s));
|
---|
5033 |
|
---|
5034 | tf = mkstemp(tname);
|
---|
5035 | if (tf < 0)
|
---|
5036 | return;
|
---|
5037 |
|
---|
5038 | *name = strsave(tname, areanum);
|
---|
5039 | errpt = ev;
|
---|
5040 | if (newenv(setjmp(errpt)) != 0)
|
---|
5041 | unlink(tname);
|
---|
5042 | else {
|
---|
5043 | pushio(e.iop->argp, (int (*)(struct ioarg *)) e.iop->iofn);
|
---|
5044 | e.iobase = e.iop;
|
---|
5045 | for (;;) {
|
---|
5046 | if (interactive && e.iop <= iostack) {
|
---|
5047 | #if ENABLE_FEATURE_EDITING
|
---|
5048 | current_prompt = cprompt->value;
|
---|
5049 | #else
|
---|
5050 | prs(cprompt->value);
|
---|
5051 | #endif
|
---|
5052 | }
|
---|
5053 | thenext = myline;
|
---|
5054 | while ((c = my_getc(ec)) != '\n' && c) {
|
---|
5055 | if (ec == '\'')
|
---|
5056 | c &= ~QUOTE;
|
---|
5057 | if (thenext >= &myline[LINELIM]) {
|
---|
5058 | c = 0;
|
---|
5059 | break;
|
---|
5060 | }
|
---|
5061 | *thenext++ = c;
|
---|
5062 | }
|
---|
5063 | *thenext = 0;
|
---|
5064 | if (strcmp(s, myline) == 0 || c == 0)
|
---|
5065 | break;
|
---|
5066 | *thenext++ = '\n';
|
---|
5067 | write(tf, myline, (int) (thenext - myline));
|
---|
5068 | }
|
---|
5069 | if (c == 0) {
|
---|
5070 | prs("here document `");
|
---|
5071 | prs(s);
|
---|
5072 | err("' unclosed");
|
---|
5073 | }
|
---|
5074 | quitenv();
|
---|
5075 | }
|
---|
5076 | close(tf);
|
---|
5077 | }
|
---|
5078 |
|
---|
5079 | /*
|
---|
5080 | * open here temp file.
|
---|
5081 | * if unquoted here, expand here temp file into second temp file.
|
---|
5082 | */
|
---|
5083 | static int herein(char *hname, int xdoll)
|
---|
5084 | {
|
---|
5085 | int hf;
|
---|
5086 | int tf;
|
---|
5087 |
|
---|
5088 | #if __GNUC__
|
---|
5089 | /* Avoid longjmp clobbering */
|
---|
5090 | (void) &tf;
|
---|
5091 | #endif
|
---|
5092 | if (hname == NULL)
|
---|
5093 | return -1;
|
---|
5094 |
|
---|
5095 | DBGPRINTF7(("HEREIN: hname is %s, xdoll=%d\n", hname, xdoll));
|
---|
5096 |
|
---|
5097 | hf = open(hname, O_RDONLY);
|
---|
5098 | if (hf < 0)
|
---|
5099 | return -1;
|
---|
5100 |
|
---|
5101 | if (xdoll) {
|
---|
5102 | char c;
|
---|
5103 | char tname[30] = ".msh_XXXXXX";
|
---|
5104 | jmp_buf ev;
|
---|
5105 |
|
---|
5106 | tf = mkstemp(tname);
|
---|
5107 | if (tf < 0)
|
---|
5108 | return -1;
|
---|
5109 | errpt = ev;
|
---|
5110 | if (newenv(setjmp(errpt)) == 0) {
|
---|
5111 | PUSHIO(afile, hf, herechar);
|
---|
5112 | setbase(e.iop);
|
---|
5113 | while ((c = subgetc(0, 0)) != 0) {
|
---|
5114 | c &= ~QUOTE;
|
---|
5115 | write(tf, &c, sizeof c);
|
---|
5116 | }
|
---|
5117 | quitenv();
|
---|
5118 | } else
|
---|
5119 | unlink(tname);
|
---|
5120 | close(tf);
|
---|
5121 | tf = open(tname, O_RDONLY);
|
---|
5122 | unlink(tname);
|
---|
5123 | return tf;
|
---|
5124 | }
|
---|
5125 | return hf;
|
---|
5126 | }
|
---|
5127 |
|
---|
5128 | static void scraphere(void)
|
---|
5129 | {
|
---|
5130 | struct here *h;
|
---|
5131 |
|
---|
5132 | DBGPRINTF7(("SCRAPHERE: enter...\n"));
|
---|
5133 |
|
---|
5134 | for (h = inhere; h != NULL; h = h->h_next) {
|
---|
5135 | if (h->h_iop && h->h_iop->io_name)
|
---|
5136 | unlink(h->h_iop->io_name);
|
---|
5137 | }
|
---|
5138 | inhere = NULL;
|
---|
5139 | }
|
---|
5140 |
|
---|
5141 | /* unlink here temp files before a freearea(area) */
|
---|
5142 | static void freehere(int area)
|
---|
5143 | {
|
---|
5144 | struct here *h, *hl;
|
---|
5145 |
|
---|
5146 | DBGPRINTF6(("FREEHERE: enter, area=%d\n", area));
|
---|
5147 |
|
---|
5148 | hl = NULL;
|
---|
5149 | for (h = acthere; h != NULL; h = h->h_next)
|
---|
5150 | if (getarea((char *) h) >= area) {
|
---|
5151 | if (h->h_iop->io_name != NULL)
|
---|
5152 | unlink(h->h_iop->io_name);
|
---|
5153 | if (hl == NULL)
|
---|
5154 | acthere = h->h_next;
|
---|
5155 | else
|
---|
5156 | hl->h_next = h->h_next;
|
---|
5157 | } else
|
---|
5158 | hl = h;
|
---|
5159 | }
|
---|
5160 |
|
---|
5161 |
|
---|
5162 | /* -------- sh.c -------- */
|
---|
5163 | /*
|
---|
5164 | * shell
|
---|
5165 | */
|
---|
5166 |
|
---|
5167 | int msh_main(int argc, char **argv);
|
---|
5168 | int msh_main(int argc, char **argv)
|
---|
5169 | {
|
---|
5170 | int f;
|
---|
5171 | char *s;
|
---|
5172 | int cflag;
|
---|
5173 | char *name, **ap;
|
---|
5174 | int (*iof) (struct ioarg *);
|
---|
5175 |
|
---|
5176 | PTR_TO_GLOBALS = xzalloc(sizeof(G));
|
---|
5177 | sharedbuf.id = AFID_NOBUF;
|
---|
5178 | mainbuf.id = AFID_NOBUF;
|
---|
5179 | e.linep = line;
|
---|
5180 | elinep = line + sizeof(line) - 5;
|
---|
5181 |
|
---|
5182 | #if ENABLE_FEATURE_EDITING
|
---|
5183 | line_input_state = new_line_input_t(FOR_SHELL);
|
---|
5184 | #endif
|
---|
5185 |
|
---|
5186 | DBGPRINTF(("MSH_MAIN: argc %d, environ %p\n", argc, environ));
|
---|
5187 |
|
---|
5188 | initarea();
|
---|
5189 | ap = environ;
|
---|
5190 | if (ap != NULL) {
|
---|
5191 | while (*ap)
|
---|
5192 | assign(*ap++, !COPYV);
|
---|
5193 | for (ap = environ; *ap;)
|
---|
5194 | export(lookup(*ap++));
|
---|
5195 | }
|
---|
5196 | closeall();
|
---|
5197 | areanum = 1;
|
---|
5198 |
|
---|
5199 | shell = lookup("SHELL");
|
---|
5200 | if (shell->value == null)
|
---|
5201 | setval(shell, (char *)DEFAULT_SHELL);
|
---|
5202 | export(shell);
|
---|
5203 |
|
---|
5204 | homedir = lookup("HOME");
|
---|
5205 | if (homedir->value == null)
|
---|
5206 | setval(homedir, "/");
|
---|
5207 | export(homedir);
|
---|
5208 |
|
---|
5209 | setval(lookup("$"), putn(getpid()));
|
---|
5210 |
|
---|
5211 | path = lookup("PATH");
|
---|
5212 | if (path->value == null) {
|
---|
5213 | /* Can be merged with same string elsewhere in bbox */
|
---|
5214 | if (geteuid() == 0)
|
---|
5215 | setval(path, bb_default_root_path);
|
---|
5216 | else
|
---|
5217 | setval(path, bb_default_path);
|
---|
5218 | }
|
---|
5219 | export(path);
|
---|
5220 |
|
---|
5221 | ifs = lookup("IFS");
|
---|
5222 | if (ifs->value == null)
|
---|
5223 | setval(ifs, " \t\n");
|
---|
5224 |
|
---|
5225 | #ifdef MSHDEBUG
|
---|
5226 | mshdbg_var = lookup("MSHDEBUG");
|
---|
5227 | if (mshdbg_var->value == null)
|
---|
5228 | setval(mshdbg_var, "0");
|
---|
5229 | #endif
|
---|
5230 |
|
---|
5231 | prompt = lookup("PS1");
|
---|
5232 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
|
---|
5233 | if (prompt->value == null)
|
---|
5234 | #endif
|
---|
5235 | setval(prompt, DEFAULT_USER_PROMPT);
|
---|
5236 | if (geteuid() == 0) {
|
---|
5237 | setval(prompt, DEFAULT_ROOT_PROMPT);
|
---|
5238 | prompt->status &= ~EXPORT;
|
---|
5239 | }
|
---|
5240 | cprompt = lookup("PS2");
|
---|
5241 | #if ENABLE_FEATURE_EDITING_FANCY_PROMPT
|
---|
5242 | if (cprompt->value == null)
|
---|
5243 | #endif
|
---|
5244 | setval(cprompt, "> ");
|
---|
5245 |
|
---|
5246 | iof = filechar;
|
---|
5247 | cflag = 0;
|
---|
5248 | name = *argv++;
|
---|
5249 | if (--argc >= 1) {
|
---|
5250 | if (argv[0][0] == '-' && argv[0][1] != '\0') {
|
---|
5251 | for (s = argv[0] + 1; *s; s++)
|
---|
5252 | switch (*s) {
|
---|
5253 | case 'c':
|
---|
5254 | prompt->status &= ~EXPORT;
|
---|
5255 | cprompt->status &= ~EXPORT;
|
---|
5256 | setval(prompt, "");
|
---|
5257 | setval(cprompt, "");
|
---|
5258 | cflag = 1;
|
---|
5259 | if (--argc > 0)
|
---|
5260 | PUSHIO(aword, *++argv, iof = nlchar);
|
---|
5261 | break;
|
---|
5262 |
|
---|
5263 | case 'q':
|
---|
5264 | qflag = SIG_DFL;
|
---|
5265 | break;
|
---|
5266 |
|
---|
5267 | case 's':
|
---|
5268 | /* standard input */
|
---|
5269 | break;
|
---|
5270 |
|
---|
5271 | case 't':
|
---|
5272 | prompt->status &= ~EXPORT;
|
---|
5273 | setval(prompt, "");
|
---|
5274 | iof = linechar;
|
---|
5275 | break;
|
---|
5276 |
|
---|
5277 | case 'i':
|
---|
5278 | interactive++;
|
---|
5279 | default:
|
---|
5280 | if (*s >= 'a' && *s <= 'z')
|
---|
5281 | FLAG[(int) *s]++;
|
---|
5282 | }
|
---|
5283 | } else {
|
---|
5284 | argv--;
|
---|
5285 | argc++;
|
---|
5286 | }
|
---|
5287 |
|
---|
5288 | if (iof == filechar && --argc > 0) {
|
---|
5289 | setval(prompt, "");
|
---|
5290 | setval(cprompt, "");
|
---|
5291 | prompt->status &= ~EXPORT;
|
---|
5292 | cprompt->status &= ~EXPORT;
|
---|
5293 |
|
---|
5294 | /* Shell is non-interactive, activate printf-based debug */
|
---|
5295 | #ifdef MSHDEBUG
|
---|
5296 | mshdbg = (int) (((char) (mshdbg_var->value[0])) - '0');
|
---|
5297 | if (mshdbg < 0)
|
---|
5298 | mshdbg = 0;
|
---|
5299 | #endif
|
---|
5300 | DBGPRINTF(("MSH_MAIN: calling newfile()\n"));
|
---|
5301 |
|
---|
5302 | name = *++argv;
|
---|
5303 | if (newfile(name))
|
---|
5304 | exit(1); /* Exit on error */
|
---|
5305 | }
|
---|
5306 | }
|
---|
5307 |
|
---|
5308 | setdash();
|
---|
5309 |
|
---|
5310 | /* This won't be true if PUSHIO has been called, say from newfile() above */
|
---|
5311 | if (e.iop < iostack) {
|
---|
5312 | PUSHIO(afile, 0, iof);
|
---|
5313 | if (isatty(0) && isatty(1) && !cflag) {
|
---|
5314 | interactive++;
|
---|
5315 | #if !ENABLE_FEATURE_SH_EXTRA_QUIET
|
---|
5316 | #ifdef MSHDEBUG
|
---|
5317 | printf("\n\n%s built-in shell (msh with debug)\n", bb_banner);
|
---|
5318 | #else
|
---|
5319 | printf("\n\n%s built-in shell (msh)\n", bb_banner);
|
---|
5320 | #endif
|
---|
5321 | printf("Enter 'help' for a list of built-in commands.\n\n");
|
---|
5322 | #endif
|
---|
5323 | }
|
---|
5324 | }
|
---|
5325 |
|
---|
5326 | signal(SIGQUIT, qflag);
|
---|
5327 | if (name && name[0] == '-') {
|
---|
5328 | interactive++;
|
---|
5329 | f = open(".profile", O_RDONLY);
|
---|
5330 | if (f >= 0)
|
---|
5331 | next(remap(f));
|
---|
5332 | f = open("/etc/profile", O_RDONLY);
|
---|
5333 | if (f >= 0)
|
---|
5334 | next(remap(f));
|
---|
5335 | }
|
---|
5336 | if (interactive)
|
---|
5337 | signal(SIGTERM, sig);
|
---|
5338 |
|
---|
5339 | if (signal(SIGINT, SIG_IGN) != SIG_IGN)
|
---|
5340 | signal(SIGINT, onintr);
|
---|
5341 | dolv = argv;
|
---|
5342 | dolc = argc;
|
---|
5343 | dolv[0] = name;
|
---|
5344 | if (dolc > 1) {
|
---|
5345 | for (ap = ++argv; --argc > 0;) {
|
---|
5346 | *ap = *argv++;
|
---|
5347 | if (assign(*ap, !COPYV)) {
|
---|
5348 | dolc--; /* keyword */
|
---|
5349 | } else {
|
---|
5350 | ap++;
|
---|
5351 | }
|
---|
5352 | }
|
---|
5353 | }
|
---|
5354 | setval(lookup("#"), putn((--dolc < 0) ? (dolc = 0) : dolc));
|
---|
5355 |
|
---|
5356 | DBGPRINTF(("MSH_MAIN: begin FOR loop, interactive %d, e.iop %p, iostack %p\n", interactive, e.iop, iostack));
|
---|
5357 |
|
---|
5358 | for (;;) {
|
---|
5359 | if (interactive && e.iop <= iostack) {
|
---|
5360 | #if ENABLE_FEATURE_EDITING
|
---|
5361 | current_prompt = prompt->value;
|
---|
5362 | #else
|
---|
5363 | prs(prompt->value);
|
---|
5364 | #endif
|
---|
5365 | }
|
---|
5366 | onecommand();
|
---|
5367 | /* Ensure that getenv("PATH") stays current */
|
---|
5368 | setenv("PATH", path->value, 1);
|
---|
5369 | }
|
---|
5370 |
|
---|
5371 | DBGPRINTF(("MSH_MAIN: returning.\n"));
|
---|
5372 | }
|
---|
5373 |
|
---|
5374 |
|
---|
5375 | /*
|
---|
5376 | * Copyright (c) 1987,1997, Prentice Hall
|
---|
5377 | * All rights reserved.
|
---|
5378 | *
|
---|
5379 | * Redistribution and use of the MINIX operating system in source and
|
---|
5380 | * binary forms, with or without modification, are permitted provided
|
---|
5381 | * that the following conditions are met:
|
---|
5382 | *
|
---|
5383 | * Redistributions of source code must retain the above copyright
|
---|
5384 | * notice, this list of conditions and the following disclaimer.
|
---|
5385 | *
|
---|
5386 | * Redistributions in binary form must reproduce the above
|
---|
5387 | * copyright notice, this list of conditions and the following
|
---|
5388 | * disclaimer in the documentation and/or other materials provided
|
---|
5389 | * with the distribution.
|
---|
5390 | *
|
---|
5391 | * Neither the name of Prentice Hall nor the names of the software
|
---|
5392 | * authors or contributors may be used to endorse or promote
|
---|
5393 | * products derived from this software without specific prior
|
---|
5394 | * written permission.
|
---|
5395 | *
|
---|
5396 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS, AUTHORS, AND
|
---|
5397 | * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
---|
5398 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
---|
5399 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
---|
5400 | * IN NO EVENT SHALL PRENTICE HALL OR ANY AUTHORS OR CONTRIBUTORS BE
|
---|
5401 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
---|
5402 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
---|
5403 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
---|
5404 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
---|
5405 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
---|
5406 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
---|
5407 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
---|
5408 | *
|
---|
5409 | */
|
---|