1 | /* vi: set sw=4 ts=4: */
|
---|
2 | /*
|
---|
3 | * getopt.c - Enhanced implementation of BSD getopt(1)
|
---|
4 | * Copyright (c) 1997, 1998, 1999, 2000 Frodo Looijaard <frodol@dds.nl>
|
---|
5 | *
|
---|
6 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
---|
7 | */
|
---|
8 |
|
---|
9 | /*
|
---|
10 | * Version 1.0-b4: Tue Sep 23 1997. First public release.
|
---|
11 | * Version 1.0: Wed Nov 19 1997.
|
---|
12 | * Bumped up the version number to 1.0
|
---|
13 | * Fixed minor typo (CSH instead of TCSH)
|
---|
14 | * Version 1.0.1: Tue Jun 3 1998
|
---|
15 | * Fixed sizeof instead of strlen bug
|
---|
16 | * Bumped up the version number to 1.0.1
|
---|
17 | * Version 1.0.2: Thu Jun 11 1998 (not present)
|
---|
18 | * Fixed gcc-2.8.1 warnings
|
---|
19 | * Fixed --version/-V option (not present)
|
---|
20 | * Version 1.0.5: Tue Jun 22 1999
|
---|
21 | * Make -u option work (not present)
|
---|
22 | * Version 1.0.6: Tue Jun 27 2000
|
---|
23 | * No important changes
|
---|
24 | * Version 1.1.0: Tue Jun 30 2000
|
---|
25 | * Added NLS support (partly written by Arkadiusz Mickiewicz
|
---|
26 | * <misiek@misiek.eu.org>)
|
---|
27 | * Ported to Busybox - Alfred M. Szmidt <ams@trillian.itslinux.org>
|
---|
28 | * Removed --version/-V and --help/-h in
|
---|
29 | * Removed parse_error(), using bb_error_msg() from Busybox instead
|
---|
30 | * Replaced our_malloc with xmalloc and our_realloc with xrealloc
|
---|
31 | *
|
---|
32 | */
|
---|
33 |
|
---|
34 | #include <getopt.h>
|
---|
35 | #include "libbb.h"
|
---|
36 |
|
---|
37 | /* NON_OPT is the code that is returned when a non-option is found in '+'
|
---|
38 | mode */
|
---|
39 | enum {
|
---|
40 | NON_OPT = 1,
|
---|
41 | #if ENABLE_FEATURE_GETOPT_LONG
|
---|
42 | /* LONG_OPT is the code that is returned when a long option is found. */
|
---|
43 | LONG_OPT = 2
|
---|
44 | #endif
|
---|
45 | };
|
---|
46 |
|
---|
47 | /* For finding activated option flags. Must match getopt32 call! */
|
---|
48 | enum {
|
---|
49 | OPT_o = 0x1, // -o
|
---|
50 | OPT_n = 0x2, // -n
|
---|
51 | OPT_q = 0x4, // -q
|
---|
52 | OPT_Q = 0x8, // -Q
|
---|
53 | OPT_s = 0x10, // -s
|
---|
54 | OPT_T = 0x20, // -T
|
---|
55 | OPT_u = 0x40, // -u
|
---|
56 | #if ENABLE_FEATURE_GETOPT_LONG
|
---|
57 | OPT_a = 0x80, // -a
|
---|
58 | OPT_l = 0x100, // -l
|
---|
59 | #endif
|
---|
60 | SHELL_IS_TCSH = 0x8000, /* hijack this bit for other purposes */
|
---|
61 | };
|
---|
62 |
|
---|
63 | /* 0 is getopt_long, 1 is getopt_long_only */
|
---|
64 | #define alternative (option_mask32 & OPT_a)
|
---|
65 |
|
---|
66 | #define quiet_errors (option_mask32 & OPT_q)
|
---|
67 | #define quiet_output (option_mask32 & OPT_Q)
|
---|
68 | #define quote (!(option_mask32 & OPT_u))
|
---|
69 | #define shell_TCSH (option_mask32 & SHELL_IS_TCSH)
|
---|
70 |
|
---|
71 | /*
|
---|
72 | * This function 'normalizes' a single argument: it puts single quotes around
|
---|
73 | * it and escapes other special characters. If quote is false, it just
|
---|
74 | * returns its argument.
|
---|
75 | * Bash only needs special treatment for single quotes; tcsh also recognizes
|
---|
76 | * exclamation marks within single quotes, and nukes whitespace.
|
---|
77 | * This function returns a pointer to a buffer that is overwritten by
|
---|
78 | * each call.
|
---|
79 | */
|
---|
80 | static const char *normalize(const char *arg)
|
---|
81 | {
|
---|
82 | char *bufptr;
|
---|
83 | #if ENABLE_FEATURE_CLEAN_UP
|
---|
84 | static char *BUFFER = NULL;
|
---|
85 | free(BUFFER);
|
---|
86 | #else
|
---|
87 | char *BUFFER;
|
---|
88 | #endif
|
---|
89 |
|
---|
90 | if (!quote) { /* Just copy arg */
|
---|
91 | BUFFER = xstrdup(arg);
|
---|
92 | return BUFFER;
|
---|
93 | }
|
---|
94 |
|
---|
95 | /* Each character in arg may take up to four characters in the result:
|
---|
96 | For a quote we need a closing quote, a backslash, a quote and an
|
---|
97 | opening quote! We need also the global opening and closing quote,
|
---|
98 | and one extra character for '\0'. */
|
---|
99 | BUFFER = xmalloc(strlen(arg)*4 + 3);
|
---|
100 |
|
---|
101 | bufptr = BUFFER;
|
---|
102 | *bufptr ++= '\'';
|
---|
103 |
|
---|
104 | while (*arg) {
|
---|
105 | if (*arg == '\'') {
|
---|
106 | /* Quote: replace it with: '\'' */
|
---|
107 | *bufptr ++= '\'';
|
---|
108 | *bufptr ++= '\\';
|
---|
109 | *bufptr ++= '\'';
|
---|
110 | *bufptr ++= '\'';
|
---|
111 | } else if (shell_TCSH && *arg == '!') {
|
---|
112 | /* Exclamation mark: replace it with: \! */
|
---|
113 | *bufptr ++= '\'';
|
---|
114 | *bufptr ++= '\\';
|
---|
115 | *bufptr ++= '!';
|
---|
116 | *bufptr ++= '\'';
|
---|
117 | } else if (shell_TCSH && *arg == '\n') {
|
---|
118 | /* Newline: replace it with: \n */
|
---|
119 | *bufptr ++= '\\';
|
---|
120 | *bufptr ++= 'n';
|
---|
121 | } else if (shell_TCSH && isspace(*arg)) {
|
---|
122 | /* Non-newline whitespace: replace it with \<ws> */
|
---|
123 | *bufptr ++= '\'';
|
---|
124 | *bufptr ++= '\\';
|
---|
125 | *bufptr ++= *arg;
|
---|
126 | *bufptr ++= '\'';
|
---|
127 | } else
|
---|
128 | /* Just copy */
|
---|
129 | *bufptr ++= *arg;
|
---|
130 | arg++;
|
---|
131 | }
|
---|
132 | *bufptr ++= '\'';
|
---|
133 | *bufptr ++= '\0';
|
---|
134 | return BUFFER;
|
---|
135 | }
|
---|
136 |
|
---|
137 | /*
|
---|
138 | * Generate the output. argv[0] is the program name (used for reporting errors).
|
---|
139 | * argv[1..] contains the options to be parsed. argc must be the number of
|
---|
140 | * elements in argv (ie. 1 if there are no options, only the program name),
|
---|
141 | * optstr must contain the short options, and longopts the long options.
|
---|
142 | * Other settings are found in global variables.
|
---|
143 | */
|
---|
144 | #if !ENABLE_FEATURE_GETOPT_LONG
|
---|
145 | #define generate_output(argv,argc,optstr,longopts) \
|
---|
146 | generate_output(argv,argc,optstr)
|
---|
147 | #endif
|
---|
148 | static int generate_output(char **argv, int argc, const char *optstr, const struct option *longopts)
|
---|
149 | {
|
---|
150 | int exit_code = 0; /* We assume everything will be OK */
|
---|
151 | int opt;
|
---|
152 | #if ENABLE_FEATURE_GETOPT_LONG
|
---|
153 | int longindex;
|
---|
154 | #endif
|
---|
155 | const char *charptr;
|
---|
156 |
|
---|
157 | if (quiet_errors) /* No error reporting from getopt(3) */
|
---|
158 | opterr = 0;
|
---|
159 |
|
---|
160 | /* We used it already in main() in getopt32(),
|
---|
161 | * we *must* reset getopt(3): */
|
---|
162 | #ifdef __GLIBC__
|
---|
163 | optind = 0;
|
---|
164 | #else /* BSD style */
|
---|
165 | optind = 1;
|
---|
166 | /* optreset = 1; */
|
---|
167 | #endif
|
---|
168 |
|
---|
169 | while (1) {
|
---|
170 | opt =
|
---|
171 | #if ENABLE_FEATURE_GETOPT_LONG
|
---|
172 | alternative ?
|
---|
173 | getopt_long_only(argc, argv, optstr, longopts, &longindex) :
|
---|
174 | getopt_long(argc, argv, optstr, longopts, &longindex);
|
---|
175 | #else
|
---|
176 | getopt(argc, argv, optstr);
|
---|
177 | #endif
|
---|
178 | if (opt == -1)
|
---|
179 | break;
|
---|
180 | if (opt == '?' || opt == ':' )
|
---|
181 | exit_code = 1;
|
---|
182 | else if (!quiet_output) {
|
---|
183 | #if ENABLE_FEATURE_GETOPT_LONG
|
---|
184 | if (opt == LONG_OPT) {
|
---|
185 | printf(" --%s", longopts[longindex].name);
|
---|
186 | if (longopts[longindex].has_arg)
|
---|
187 | printf(" %s",
|
---|
188 | normalize(optarg ? optarg : ""));
|
---|
189 | } else
|
---|
190 | #endif
|
---|
191 | if (opt == NON_OPT)
|
---|
192 | printf(" %s", normalize(optarg));
|
---|
193 | else {
|
---|
194 | printf(" -%c", opt);
|
---|
195 | charptr = strchr(optstr, opt);
|
---|
196 | if (charptr != NULL && *++charptr == ':')
|
---|
197 | printf(" %s",
|
---|
198 | normalize(optarg ? optarg : ""));
|
---|
199 | }
|
---|
200 | }
|
---|
201 | }
|
---|
202 |
|
---|
203 | if (!quiet_output) {
|
---|
204 | printf(" --");
|
---|
205 | while (optind < argc)
|
---|
206 | printf(" %s", normalize(argv[optind++]));
|
---|
207 | bb_putchar('\n');
|
---|
208 | }
|
---|
209 | return exit_code;
|
---|
210 | }
|
---|
211 |
|
---|
212 | #if ENABLE_FEATURE_GETOPT_LONG
|
---|
213 | /*
|
---|
214 | * Register several long options. options is a string of long options,
|
---|
215 | * separated by commas or whitespace.
|
---|
216 | * This nukes options!
|
---|
217 | */
|
---|
218 | static struct option *add_long_options(struct option *long_options, char *options)
|
---|
219 | {
|
---|
220 | int long_nr = 0;
|
---|
221 | int arg_opt, tlen;
|
---|
222 | char *tokptr = strtok(options, ", \t\n");
|
---|
223 |
|
---|
224 | if (long_options)
|
---|
225 | while (long_options[long_nr].name)
|
---|
226 | long_nr++;
|
---|
227 |
|
---|
228 | while (tokptr) {
|
---|
229 | arg_opt = no_argument;
|
---|
230 | tlen = strlen(tokptr);
|
---|
231 | if (tlen) {
|
---|
232 | tlen--;
|
---|
233 | if (tokptr[tlen] == ':') {
|
---|
234 | arg_opt = required_argument;
|
---|
235 | if (tlen && tokptr[tlen-1] == ':') {
|
---|
236 | tlen--;
|
---|
237 | arg_opt = optional_argument;
|
---|
238 | }
|
---|
239 | tokptr[tlen] = '\0';
|
---|
240 | if (tlen == 0)
|
---|
241 | bb_error_msg_and_die("empty long option specified");
|
---|
242 | }
|
---|
243 | long_options = xrealloc_vector(long_options, 4, long_nr);
|
---|
244 | long_options[long_nr].has_arg = arg_opt;
|
---|
245 | /*long_options[long_nr].flag = NULL; - xrealloc_vector did it */
|
---|
246 | long_options[long_nr].val = LONG_OPT;
|
---|
247 | long_options[long_nr].name = xstrdup(tokptr);
|
---|
248 | long_nr++;
|
---|
249 | /*memset(&long_options[long_nr], 0, sizeof(long_options[0])); - xrealloc_vector did it */
|
---|
250 | }
|
---|
251 | tokptr = strtok(NULL, ", \t\n");
|
---|
252 | }
|
---|
253 | return long_options;
|
---|
254 | }
|
---|
255 | #endif
|
---|
256 |
|
---|
257 | static void set_shell(const char *new_shell)
|
---|
258 | {
|
---|
259 | if (!strcmp(new_shell, "bash") || !strcmp(new_shell, "sh"))
|
---|
260 | return;
|
---|
261 | if (!strcmp(new_shell, "tcsh") || !strcmp(new_shell, "csh"))
|
---|
262 | option_mask32 |= SHELL_IS_TCSH;
|
---|
263 | else
|
---|
264 | bb_error_msg("unknown shell '%s', assuming bash", new_shell);
|
---|
265 | }
|
---|
266 |
|
---|
267 |
|
---|
268 | /* Exit codes:
|
---|
269 | * 0) No errors, successful operation.
|
---|
270 | * 1) getopt(3) returned an error.
|
---|
271 | * 2) A problem with parameter parsing for getopt(1).
|
---|
272 | * 3) Internal error, out of memory
|
---|
273 | * 4) Returned for -T
|
---|
274 | */
|
---|
275 |
|
---|
276 | #if ENABLE_FEATURE_GETOPT_LONG
|
---|
277 | static const char getopt_longopts[] ALIGN1 =
|
---|
278 | "options\0" Required_argument "o"
|
---|
279 | "longoptions\0" Required_argument "l"
|
---|
280 | "quiet\0" No_argument "q"
|
---|
281 | "quiet-output\0" No_argument "Q"
|
---|
282 | "shell\0" Required_argument "s"
|
---|
283 | "test\0" No_argument "T"
|
---|
284 | "unquoted\0" No_argument "u"
|
---|
285 | "alternative\0" No_argument "a"
|
---|
286 | "name\0" Required_argument "n"
|
---|
287 | ;
|
---|
288 | #endif
|
---|
289 |
|
---|
290 | int getopt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
291 | int getopt_main(int argc, char **argv)
|
---|
292 | {
|
---|
293 | char *optstr = NULL;
|
---|
294 | char *name = NULL;
|
---|
295 | unsigned opt;
|
---|
296 | const char *compatible;
|
---|
297 | char *s_arg;
|
---|
298 | #if ENABLE_FEATURE_GETOPT_LONG
|
---|
299 | struct option *long_options = NULL;
|
---|
300 | llist_t *l_arg = NULL;
|
---|
301 | #endif
|
---|
302 |
|
---|
303 | compatible = getenv("GETOPT_COMPATIBLE"); /* used as yes/no flag */
|
---|
304 |
|
---|
305 | if (argc == 1) {
|
---|
306 | if (compatible) {
|
---|
307 | /* For some reason, the original getopt gave no error
|
---|
308 | when there were no arguments. */
|
---|
309 | printf(" --\n");
|
---|
310 | return 0;
|
---|
311 | }
|
---|
312 | bb_error_msg_and_die("missing optstring argument");
|
---|
313 | }
|
---|
314 |
|
---|
315 | if (argv[1][0] != '-' || compatible) {
|
---|
316 | char *s;
|
---|
317 |
|
---|
318 | option_mask32 |= OPT_u; /* quoting off */
|
---|
319 | s = xstrdup(argv[1] + strspn(argv[1], "-+"));
|
---|
320 | argv[1] = argv[0];
|
---|
321 | return generate_output(argv+1, argc-1, s, long_options);
|
---|
322 | }
|
---|
323 |
|
---|
324 | #if !ENABLE_FEATURE_GETOPT_LONG
|
---|
325 | opt = getopt32(argv, "+o:n:qQs:Tu", &optstr, &name, &s_arg);
|
---|
326 | #else
|
---|
327 | applet_long_options = getopt_longopts;
|
---|
328 | opt_complementary = "l::";
|
---|
329 | opt = getopt32(argv, "+o:n:qQs:Tual:",
|
---|
330 | &optstr, &name, &s_arg, &l_arg);
|
---|
331 | /* Effectuate the read options for the applet itself */
|
---|
332 | while (l_arg) {
|
---|
333 | long_options = add_long_options(long_options, llist_pop(&l_arg));
|
---|
334 | }
|
---|
335 | #endif
|
---|
336 |
|
---|
337 | if (opt & OPT_s) {
|
---|
338 | set_shell(s_arg);
|
---|
339 | }
|
---|
340 |
|
---|
341 | if (opt & OPT_T) {
|
---|
342 | return 4;
|
---|
343 | }
|
---|
344 |
|
---|
345 | /* All options controlling the applet have now been parsed */
|
---|
346 | if (!optstr) {
|
---|
347 | if (optind >= argc)
|
---|
348 | bb_error_msg_and_die("missing optstring argument");
|
---|
349 | optstr = argv[optind++];
|
---|
350 | }
|
---|
351 |
|
---|
352 | argv[optind-1] = name ? name : argv[0];
|
---|
353 | return generate_output(argv+optind-1, argc-optind+1, optstr, long_options);
|
---|
354 | }
|
---|