source: MondoRescue/branches/2.2.5/mindi-busybox/coreutils/ls.c@ 1765

Last change on this file since 1765 was 1765, checked in by Bruno Cornec, 16 years ago

Update to busybox 1.7.2
File size: 25.3 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * tiny-ls.c version 0.1.0: A minimalist 'ls'
4 * Copyright (C) 1996 Brian Candler <B.Candler@pobox.com>
5 *
6 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
7 */
8
9/*
10 * To achieve a small memory footprint, this version of 'ls' doesn't do any
11 * file sorting, and only has the most essential command line switches
12 * (i.e., the ones I couldn't live without :-) All features which involve
13 * linking in substantial chunks of libc can be disabled.
14 *
15 * Although I don't really want to add new features to this program to
16 * keep it small, I *am* interested to receive bug fixes and ways to make
17 * it more portable.
18 *
19 * KNOWN BUGS:
20 * 1. ls -l of a directory doesn't give "total <blocks>" header
21 * 2. ls of a symlink to a directory doesn't list directory contents
22 * 3. hidden files can make column width too large
23 *
24 * NON-OPTIMAL BEHAVIOUR:
25 * 1. autowidth reads directories twice
26 * 2. if you do a short directory listing without filetype characters
27 * appended, there's no need to stat each one
28 * PORTABILITY:
29 * 1. requires lstat (BSD) - how do you do it without?
30 */
31
32#include <getopt.h>
33#include "libbb.h"
34
35/* This is a NOEXEC applet. Be very careful! */
36
37
38enum {
39
40TERMINAL_WIDTH = 80, /* use 79 if terminal has linefold bug */
41COLUMN_GAP = 2, /* includes the file type char */
42
43/* what is the overall style of the listing */
44STYLE_COLUMNS = 1 << 21, /* fill columns */
45STYLE_LONG = 2 << 21, /* one record per line, extended info */
46STYLE_SINGLE = 3 << 21, /* one record per line */
47STYLE_MASK = STYLE_SINGLE,
48
49/* 51306 lrwxrwxrwx 1 root root 2 May 11 01:43 /bin/view -> vi* */
50/* what file information will be listed */
51LIST_INO = 1 << 0,
52LIST_BLOCKS = 1 << 1,
53LIST_MODEBITS = 1 << 2,
54LIST_NLINKS = 1 << 3,
55LIST_ID_NAME = 1 << 4,
56LIST_ID_NUMERIC = 1 << 5,
57LIST_CONTEXT = 1 << 6,
58LIST_SIZE = 1 << 7,
59LIST_DEV = 1 << 8,
60LIST_DATE_TIME = 1 << 9,
61LIST_FULLTIME = 1 << 10,
62LIST_FILENAME = 1 << 11,
63LIST_SYMLINK = 1 << 12,
64LIST_FILETYPE = 1 << 13,
65LIST_EXEC = 1 << 14,
66LIST_MASK = (LIST_EXEC << 1) - 1,
67
68/* what files will be displayed */
69DISP_DIRNAME = 1 << 15, /* 2 or more items? label directories */
70DISP_HIDDEN = 1 << 16, /* show filenames starting with . */
71DISP_DOT = 1 << 17, /* show . and .. */
72DISP_NOLIST = 1 << 18, /* show directory as itself, not contents */
73DISP_RECURSIVE = 1 << 19, /* show directory and everything below it */
74DISP_ROWS = 1 << 20, /* print across rows */
75DISP_MASK = ((DISP_ROWS << 1) - 1) & ~(DISP_DIRNAME - 1),
76
77/* how will the files be sorted (CONFIG_FEATURE_LS_SORTFILES) */
78SORT_FORWARD = 0, /* sort in reverse order */
79SORT_REVERSE = 1 << 27, /* sort in reverse order */
80
81SORT_NAME = 0, /* sort by file name */
82SORT_SIZE = 1 << 28, /* sort by file size */
83SORT_ATIME = 2 << 28, /* sort by last access time */
84SORT_CTIME = 3 << 28, /* sort by last change time */
85SORT_MTIME = 4 << 28, /* sort by last modification time */
86SORT_VERSION = 5 << 28, /* sort by version */
87SORT_EXT = 6 << 28, /* sort by file name extension */
88SORT_DIR = 7 << 28, /* sort by file or directory */
89SORT_MASK = (7 << 28) * ENABLE_FEATURE_LS_SORTFILES,
90
91/* which of the three times will be used */
92TIME_CHANGE = (1 << 23) * ENABLE_FEATURE_LS_TIMESTAMPS,
93TIME_ACCESS = (1 << 24) * ENABLE_FEATURE_LS_TIMESTAMPS,
94TIME_MASK = (3 << 23) * ENABLE_FEATURE_LS_TIMESTAMPS,
95
96FOLLOW_LINKS = (1 << 25) * ENABLE_FEATURE_LS_FOLLOWLINKS,
97
98LS_DISP_HR = (1 << 26) * ENABLE_FEATURE_HUMAN_READABLE,
99
100LIST_SHORT = LIST_FILENAME,
101LIST_LONG = LIST_MODEBITS | LIST_NLINKS | LIST_ID_NAME | LIST_SIZE | \
102 LIST_DATE_TIME | LIST_FILENAME | LIST_SYMLINK,
103
104SPLIT_DIR = 1,
105SPLIT_FILE = 0,
106SPLIT_SUBDIR = 2,
107
108};
109
110#define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
111#define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
112#define APPCHAR(mode) ("\0|\0\0/\0\0\0\0\0@\0=\0\0\0" [TYPEINDEX(mode)])
113#define COLOR(mode) ("\000\043\043\043\042\000\043\043"\
114 "\000\000\044\000\043\000\000\040" [TYPEINDEX(mode)])
115#define ATTR(mode) ("\00\00\01\00\01\00\01\00"\
116 "\00\00\01\00\01\00\00\01" [TYPEINDEX(mode)])
117
118/* colored LS support by JaWi, janwillem.janssen@lxtreme.nl */
119#if ENABLE_FEATURE_LS_COLOR
120static smallint show_color;
121/* long option entry used only for --color, which has no short option
122 * equivalent */
123static const char ls_color_opt[] ALIGN1 =
124 "color\0" Optional_argument "\xff" /* no short equivalent */
125 ;
126#else
127enum { show_color = 0 };
128#endif
129
130/*
131 * a directory entry and its stat info are stored here
132 */
133struct dnode { /* the basic node */
134 const char *name; /* the dir entry name */
135 const char *fullname; /* the dir entry name */
136 int allocated;
137 struct stat dstat; /* the file stat info */
138 USE_SELINUX(security_context_t sid;)
139 struct dnode *next; /* point at the next node */
140};
141typedef struct dnode dnode_t;
142
143static struct dnode **list_dir(const char *);
144static struct dnode **dnalloc(int);
145static int list_single(struct dnode *);
146
147static unsigned all_fmt;
148
149#if ENABLE_FEATURE_AUTOWIDTH
150static unsigned tabstops = COLUMN_GAP;
151static unsigned terminal_width = TERMINAL_WIDTH;
152#else
153enum {
154 tabstops = COLUMN_GAP,
155 terminal_width = TERMINAL_WIDTH,
156};
157#endif
158
159static int status = EXIT_SUCCESS;
160
161static struct dnode *my_stat(const char *fullname, const char *name, int force_follow)
162{
163 struct stat dstat;
164 struct dnode *cur;
165 USE_SELINUX(security_context_t sid = NULL;)
166
167 if ((all_fmt & FOLLOW_LINKS) || force_follow) {
168#if ENABLE_SELINUX
169 if (is_selinux_enabled()) {
170 getfilecon(fullname, &sid);
171 }
172#endif
173 if (stat(fullname, &dstat)) {
174 bb_perror_msg("%s", fullname);
175 status = EXIT_FAILURE;
176 return 0;
177 }
178 } else {
179#if ENABLE_SELINUX
180 if (is_selinux_enabled()) {
181 lgetfilecon(fullname, &sid);
182 }
183#endif
184 if (lstat(fullname, &dstat)) {
185 bb_perror_msg("%s", fullname);
186 status = EXIT_FAILURE;
187 return 0;
188 }
189 }
190
191 cur = xmalloc(sizeof(struct dnode));
192 cur->fullname = fullname;
193 cur->name = name;
194 cur->dstat = dstat;
195 USE_SELINUX(cur->sid = sid;)
196 return cur;
197}
198
199#if ENABLE_FEATURE_LS_COLOR
200static char fgcolor(mode_t mode)
201{
202 /* Check wheter the file is existing (if so, color it red!) */
203 if (errno == ENOENT)
204 return '\037';
205 if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
206 return COLOR(0xF000); /* File is executable ... */
207 return COLOR(mode);
208}
209
210static char bgcolor(mode_t mode)
211{
212 if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
213 return ATTR(0xF000); /* File is executable ... */
214 return ATTR(mode);
215}
216#endif
217
218#if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR
219static char append_char(mode_t mode)
220{
221 if (!(all_fmt & LIST_FILETYPE))
222 return '\0';
223 if (S_ISDIR(mode))
224 return '/';
225 if (!(all_fmt & LIST_EXEC))
226 return '\0';
227 if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
228 return '*';
229 return APPCHAR(mode);
230}
231#endif
232
233#define countdirs(A, B) count_dirs((A), (B), 1)
234#define countsubdirs(A, B) count_dirs((A), (B), 0)
235static int count_dirs(struct dnode **dn, int nfiles, int notsubdirs)
236{
237 int i, dirs;
238
239 if (!dn)
240 return 0;
241 dirs = 0;
242 for (i = 0; i < nfiles; i++) {
243 const char *name;
244 if (!S_ISDIR(dn[i]->dstat.st_mode))
245 continue;
246 name = dn[i]->name;
247 if (notsubdirs
248 || name[0]!='.' || (name[1] && (name[1]!='.' || name[2]))
249 ) {
250 dirs++;
251 }
252 }
253 return dirs;
254}
255
256static int countfiles(struct dnode **dnp)
257{
258 int nfiles;
259 struct dnode *cur;
260
261 if (dnp == NULL)
262 return 0;
263 nfiles = 0;
264 for (cur = dnp[0]; cur->next; cur = cur->next)
265 nfiles++;
266 nfiles++;
267 return nfiles;
268}
269
270/* get memory to hold an array of pointers */
271static struct dnode **dnalloc(int num)
272{
273 if (num < 1)
274 return NULL;
275
276 return xzalloc(num * sizeof(struct dnode *));
277}
278
279#if ENABLE_FEATURE_LS_RECURSIVE
280static void dfree(struct dnode **dnp, int nfiles)
281{
282 int i;
283
284 if (dnp == NULL)
285 return;
286
287 for (i = 0; i < nfiles; i++) {
288 struct dnode *cur = dnp[i];
289 if (cur->allocated)
290 free((char*)cur->fullname); /* free the filename */
291 free(cur); /* free the dnode */
292 }
293 free(dnp); /* free the array holding the dnode pointers */
294}
295#else
296#define dfree(...) ((void)0)
297#endif
298
299static struct dnode **splitdnarray(struct dnode **dn, int nfiles, int which)
300{
301 int dncnt, i, d;
302 struct dnode **dnp;
303
304 if (dn == NULL || nfiles < 1)
305 return NULL;
306
307 /* count how many dirs and regular files there are */
308 if (which == SPLIT_SUBDIR)
309 dncnt = countsubdirs(dn, nfiles);
310 else {
311 dncnt = countdirs(dn, nfiles); /* assume we are looking for dirs */
312 if (which == SPLIT_FILE)
313 dncnt = nfiles - dncnt; /* looking for files */
314 }
315
316 /* allocate a file array and a dir array */
317 dnp = dnalloc(dncnt);
318
319 /* copy the entrys into the file or dir array */
320 for (d = i = 0; i < nfiles; i++) {
321 if (S_ISDIR(dn[i]->dstat.st_mode)) {
322 const char *name;
323 if (!(which & (SPLIT_DIR|SPLIT_SUBDIR)))
324 continue;
325 name = dn[i]->name;
326 if ((which & SPLIT_DIR)
327 || name[0]!='.' || (name[1] && (name[1]!='.' || name[2]))
328 ) {
329 dnp[d++] = dn[i];
330 }
331 } else if (!(which & (SPLIT_DIR|SPLIT_SUBDIR))) {
332 dnp[d++] = dn[i];
333 }
334 }
335 return dnp;
336}
337
338#if ENABLE_FEATURE_LS_SORTFILES
339static int sortcmp(const void *a, const void *b)
340{
341 struct dnode *d1 = *(struct dnode **)a;
342 struct dnode *d2 = *(struct dnode **)b;
343 unsigned sort_opts = all_fmt & SORT_MASK;
344 int dif;
345
346 dif = 0; /* assume SORT_NAME */
347 // TODO: use pre-initialized function pointer
348 // instead of branch forest
349 if (sort_opts == SORT_SIZE) {
350 dif = (int) (d2->dstat.st_size - d1->dstat.st_size);
351 } else if (sort_opts == SORT_ATIME) {
352 dif = (int) (d2->dstat.st_atime - d1->dstat.st_atime);
353 } else if (sort_opts == SORT_CTIME) {
354 dif = (int) (d2->dstat.st_ctime - d1->dstat.st_ctime);
355 } else if (sort_opts == SORT_MTIME) {
356 dif = (int) (d2->dstat.st_mtime - d1->dstat.st_mtime);
357 } else if (sort_opts == SORT_DIR) {
358 dif = S_ISDIR(d2->dstat.st_mode) - S_ISDIR(d1->dstat.st_mode);
359 /* } else if (sort_opts == SORT_VERSION) { */
360 /* } else if (sort_opts == SORT_EXT) { */
361 }
362
363 if (dif == 0) {
364 /* sort by name - may be a tie_breaker for time or size cmp */
365 if (ENABLE_LOCALE_SUPPORT) dif = strcoll(d1->name, d2->name);
366 else dif = strcmp(d1->name, d2->name);
367 }
368
369 if (all_fmt & SORT_REVERSE) {
370 dif = -dif;
371 }
372 return dif;
373}
374
375static void dnsort(struct dnode **dn, int size)
376{
377 qsort(dn, size, sizeof(*dn), sortcmp);
378}
379#else
380#define dnsort(dn, size) ((void)0)
381#endif
382
383
384static void showfiles(struct dnode **dn, int nfiles)
385{
386 int i, ncols, nrows, row, nc;
387 int column = 0;
388 int nexttab = 0;
389 int column_width = 0; /* for STYLE_LONG and STYLE_SINGLE not used */
390
391 if (dn == NULL || nfiles < 1)
392 return;
393
394 if (all_fmt & STYLE_LONG) {
395 ncols = 1;
396 } else {
397 /* find the longest file name, use that as the column width */
398 for (i = 0; i < nfiles; i++) {
399 int len = strlen(dn[i]->name);
400 if (column_width < len)
401 column_width = len;
402 }
403 column_width += tabstops +
404 USE_SELINUX( ((all_fmt & LIST_CONTEXT) ? 33 : 0) + )
405 ((all_fmt & LIST_INO) ? 8 : 0) +
406 ((all_fmt & LIST_BLOCKS) ? 5 : 0);
407 ncols = (int) (terminal_width / column_width);
408 }
409
410 if (ncols > 1) {
411 nrows = nfiles / ncols;
412 if (nrows * ncols < nfiles)
413 nrows++; /* round up fractionals */
414 } else {
415 nrows = nfiles;
416 ncols = 1;
417 }
418
419 for (row = 0; row < nrows; row++) {
420 for (nc = 0; nc < ncols; nc++) {
421 /* reach into the array based on the column and row */
422 i = (nc * nrows) + row; /* assume display by column */
423 if (all_fmt & DISP_ROWS)
424 i = (row * ncols) + nc; /* display across row */
425 if (i < nfiles) {
426 if (column > 0) {
427 nexttab -= column;
428 printf("%*s", nexttab, "");
429 column += nexttab;
430 }
431 nexttab = column + column_width;
432 column += list_single(dn[i]);
433 }
434 }
435 putchar('\n');
436 column = 0;
437 }
438}
439
440
441static void showdirs(struct dnode **dn, int ndirs, int first)
442{
443 int i, nfiles;
444 struct dnode **subdnp;
445 int dndirs;
446 struct dnode **dnd;
447
448 if (dn == NULL || ndirs < 1)
449 return;
450
451 for (i = 0; i < ndirs; i++) {
452 if (all_fmt & (DISP_DIRNAME | DISP_RECURSIVE)) {
453 if (!first)
454 puts("");
455 first = 0;
456 printf("%s:\n", dn[i]->fullname);
457 }
458 subdnp = list_dir(dn[i]->fullname);
459 nfiles = countfiles(subdnp);
460 if (nfiles > 0) {
461 /* list all files at this level */
462 dnsort(subdnp, nfiles);
463 showfiles(subdnp, nfiles);
464 if (ENABLE_FEATURE_LS_RECURSIVE) {
465 if (all_fmt & DISP_RECURSIVE) {
466 /* recursive- list the sub-dirs */
467 dnd = splitdnarray(subdnp, nfiles, SPLIT_SUBDIR);
468 dndirs = countsubdirs(subdnp, nfiles);
469 if (dndirs > 0) {
470 dnsort(dnd, dndirs);
471 showdirs(dnd, dndirs, 0);
472 /* free the array of dnode pointers to the dirs */
473 free(dnd);
474 }
475 }
476 /* free the dnodes and the fullname mem */
477 dfree(subdnp, nfiles);
478 }
479 }
480 }
481}
482
483
484static struct dnode **list_dir(const char *path)
485{
486 struct dnode *dn, *cur, **dnp;
487 struct dirent *entry;
488 DIR *dir;
489 int i, nfiles;
490
491 if (path == NULL)
492 return NULL;
493
494 dn = NULL;
495 nfiles = 0;
496 dir = warn_opendir(path);
497 if (dir == NULL) {
498 status = EXIT_FAILURE;
499 return NULL; /* could not open the dir */
500 }
501 while ((entry = readdir(dir)) != NULL) {
502 char *fullname;
503
504 /* are we going to list the file- it may be . or .. or a hidden file */
505 if (entry->d_name[0] == '.') {
506 if ((!entry->d_name[1] || (entry->d_name[1] == '.' && !entry->d_name[2]))
507 && !(all_fmt & DISP_DOT)
508 ) {
509 continue;
510 }
511 if (!(all_fmt & DISP_HIDDEN))
512 continue;
513 }
514 fullname = concat_path_file(path, entry->d_name);
515 cur = my_stat(fullname, bb_basename(fullname), 0);
516 if (!cur) {
517 free(fullname);
518 continue;
519 }
520 cur->allocated = 1;
521 cur->next = dn;
522 dn = cur;
523 nfiles++;
524 }
525 closedir(dir);
526
527 /* now that we know how many files there are
528 * allocate memory for an array to hold dnode pointers
529 */
530 if (dn == NULL)
531 return NULL;
532 dnp = dnalloc(nfiles);
533 for (i = 0, cur = dn; i < nfiles; i++) {
534 dnp[i] = cur; /* save pointer to node in array */
535 cur = cur->next;
536 }
537
538 return dnp;
539}
540
541
542#if ENABLE_FEATURE_LS_TIMESTAMPS
543/* Do time() just once. Saves one syscall per file for "ls -l" */
544/* Initialized in main() */
545static time_t current_time_t;
546#endif
547
548static int list_single(struct dnode *dn)
549{
550 int i, column = 0;
551
552#if ENABLE_FEATURE_LS_TIMESTAMPS
553 char *filetime;
554 time_t ttime, age;
555#endif
556#if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR
557 struct stat info;
558 char append;
559#endif
560
561 if (dn->fullname == NULL)
562 return 0;
563
564#if ENABLE_FEATURE_LS_TIMESTAMPS
565 ttime = dn->dstat.st_mtime; /* the default time */
566 if (all_fmt & TIME_ACCESS)
567 ttime = dn->dstat.st_atime;
568 if (all_fmt & TIME_CHANGE)
569 ttime = dn->dstat.st_ctime;
570 filetime = ctime(&ttime);
571#endif
572#if ENABLE_FEATURE_LS_FILETYPES
573 append = append_char(dn->dstat.st_mode);
574#endif
575
576 for (i = 0; i <= 31; i++) {
577 switch (all_fmt & (1 << i)) {
578 case LIST_INO:
579 column += printf("%7ld ", (long) dn->dstat.st_ino);
580 break;
581 case LIST_BLOCKS:
582 column += printf("%4"OFF_FMT"d ", (off_t) dn->dstat.st_blocks >> 1);
583 break;
584 case LIST_MODEBITS:
585 column += printf("%-10s ", (char *) bb_mode_string(dn->dstat.st_mode));
586 break;
587 case LIST_NLINKS:
588 column += printf("%4ld ", (long) dn->dstat.st_nlink);
589 break;
590 case LIST_ID_NAME:
591#if ENABLE_FEATURE_LS_USERNAME
592 printf("%-8.8s %-8.8s",
593 get_cached_username(dn->dstat.st_uid),
594 get_cached_groupname(dn->dstat.st_gid));
595 column += 17;
596 break;
597#endif
598 case LIST_ID_NUMERIC:
599 column += printf("%-8d %-8d", dn->dstat.st_uid, dn->dstat.st_gid);
600 break;
601 case LIST_SIZE:
602 case LIST_DEV:
603 if (S_ISBLK(dn->dstat.st_mode) || S_ISCHR(dn->dstat.st_mode)) {
604 column += printf("%4d, %3d ", (int) major(dn->dstat.st_rdev),
605 (int) minor(dn->dstat.st_rdev));
606 } else {
607 if (all_fmt & LS_DISP_HR) {
608 column += printf("%9s ",
609 make_human_readable_str(dn->dstat.st_size, 1, 0));
610 } else {
611 column += printf("%9"OFF_FMT"d ", (off_t) dn->dstat.st_size);
612 }
613 }
614 break;
615#if ENABLE_FEATURE_LS_TIMESTAMPS
616 case LIST_FULLTIME:
617 printf("%24.24s ", filetime);
618 column += 25;
619 break;
620 case LIST_DATE_TIME:
621 if ((all_fmt & LIST_FULLTIME) == 0) {
622 /* current_time_t ~== time(NULL) */
623 age = current_time_t - ttime;
624 printf("%6.6s ", filetime + 4);
625 if (age < 3600L * 24 * 365 / 2 && age > -15 * 60) {
626 /* hh:mm if less than 6 months old */
627 printf("%5.5s ", filetime + 11);
628 } else {
629 printf(" %4.4s ", filetime + 20);
630 }
631 column += 13;
632 }
633 break;
634#endif
635#if ENABLE_SELINUX
636 case LIST_CONTEXT:
637 {
638 char context[80];
639 int len = 0;
640
641 if (dn->sid) {
642 /* I assume sid initilized with NULL */
643 len = strlen(dn->sid) + 1;
644 safe_strncpy(context, dn->sid, len);
645 freecon(dn->sid);
646 } else {
647 safe_strncpy(context, "unknown", 8);
648 }
649 printf("%-32s ", context);
650 column += MAX(33, len);
651 }
652 break;
653#endif
654 case LIST_FILENAME:
655 errno = 0;
656#if ENABLE_FEATURE_LS_COLOR
657 if (show_color && !lstat(dn->fullname, &info)) {
658 printf("\033[%d;%dm", bgcolor(info.st_mode),
659 fgcolor(info.st_mode));
660 }
661#endif
662 column += printf("%s", dn->name);
663 if (show_color) {
664 printf("\033[0m");
665 }
666 break;
667 case LIST_SYMLINK:
668 if (S_ISLNK(dn->dstat.st_mode)) {
669 char *lpath = xmalloc_readlink_or_warn(dn->fullname);
670 if (!lpath) break;
671 printf(" -> ");
672#if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR
673 if (!stat(dn->fullname, &info)) {
674 append = append_char(info.st_mode);
675 }
676#endif
677#if ENABLE_FEATURE_LS_COLOR
678 if (show_color) {
679 errno = 0;
680 printf("\033[%d;%dm", bgcolor(info.st_mode),
681 fgcolor(info.st_mode));
682 }
683#endif
684 column += printf("%s", lpath) + 4;
685 if (show_color) {
686 printf("\033[0m");
687 }
688 free(lpath);
689 }
690 break;
691#if ENABLE_FEATURE_LS_FILETYPES
692 case LIST_FILETYPE:
693 if (append) {
694 putchar(append);
695 column++;
696 }
697 break;
698#endif
699 }
700 }
701
702 return column;
703}
704
705/* "[-]Cadil1", POSIX mandated options, busybox always supports */
706/* "[-]gnsx", POSIX non-mandated options, busybox always supports */
707/* "[-]Ak" GNU options, busybox always supports */
708/* "[-]FLRctur", POSIX mandated options, busybox optionally supports */
709/* "[-]p", POSIX non-mandated options, busybox optionally supports */
710/* "[-]SXvThw", GNU options, busybox optionally supports */
711/* "[-]K", SELinux mandated options, busybox optionally supports */
712/* "[-]e", I think we made this one up */
713static const char ls_options[] ALIGN1 =
714 "Cadil1gnsxAk"
715 USE_FEATURE_LS_TIMESTAMPS("cetu")
716 USE_FEATURE_LS_SORTFILES("SXrv")
717 USE_FEATURE_LS_FILETYPES("Fp")
718 USE_FEATURE_LS_FOLLOWLINKS("L")
719 USE_FEATURE_LS_RECURSIVE("R")
720 USE_FEATURE_HUMAN_READABLE("h")
721 USE_SELINUX("K")
722 USE_FEATURE_AUTOWIDTH("T:w:")
723 USE_SELINUX("Z");
724
725enum {
726 LIST_MASK_TRIGGER = 0,
727 STYLE_MASK_TRIGGER = STYLE_MASK,
728 DISP_MASK_TRIGGER = DISP_ROWS,
729 SORT_MASK_TRIGGER = SORT_MASK,
730};
731
732static const unsigned opt_flags[] = {
733 LIST_SHORT | STYLE_COLUMNS, /* C */
734 DISP_HIDDEN | DISP_DOT, /* a */
735 DISP_NOLIST, /* d */
736 LIST_INO, /* i */
737 LIST_LONG | STYLE_LONG, /* l - remember LS_DISP_HR in mask! */
738 LIST_SHORT | STYLE_SINGLE, /* 1 */
739 0, /* g - ingored */
740 LIST_ID_NUMERIC, /* n */
741 LIST_BLOCKS, /* s */
742 DISP_ROWS, /* x */
743 DISP_HIDDEN, /* A */
744 ENABLE_SELINUX * LIST_CONTEXT, /* k (ignored if !SELINUX) */
745#if ENABLE_FEATURE_LS_TIMESTAMPS
746 TIME_CHANGE | (ENABLE_FEATURE_LS_SORTFILES * SORT_CTIME), /* c */
747 LIST_FULLTIME, /* e */
748 ENABLE_FEATURE_LS_SORTFILES * SORT_MTIME, /* t */
749 TIME_ACCESS | (ENABLE_FEATURE_LS_SORTFILES * SORT_ATIME), /* u */
750#endif
751#if ENABLE_FEATURE_LS_SORTFILES
752 SORT_SIZE, /* S */
753 SORT_EXT, /* X */
754 SORT_REVERSE, /* r */
755 SORT_VERSION, /* v */
756#endif
757#if ENABLE_FEATURE_LS_FILETYPES
758 LIST_FILETYPE | LIST_EXEC, /* F */
759 LIST_FILETYPE, /* p */
760#endif
761#if ENABLE_FEATURE_LS_FOLLOWLINKS
762 FOLLOW_LINKS, /* L */
763#endif
764#if ENABLE_FEATURE_LS_RECURSIVE
765 DISP_RECURSIVE, /* R */
766#endif
767#if ENABLE_FEATURE_HUMAN_READABLE
768 LS_DISP_HR, /* h */
769#endif
770#if ENABLE_SELINUX
771 LIST_MODEBITS|LIST_NLINKS|LIST_CONTEXT|LIST_SIZE|LIST_DATE_TIME, /* K */
772#endif
773#if ENABLE_FEATURE_AUTOWIDTH
774 0, 0, /* T, w - ignored */
775#endif
776#if ENABLE_SELINUX
777 LIST_MODEBITS|LIST_ID_NAME|LIST_CONTEXT, /* Z */
778#endif
779 (1U<<31)
780};
781
782
783/* THIS IS A "SAFE" APPLET, main() MAY BE CALLED INTERNALLY FROM SHELL */
784/* BE CAREFUL! */
785
786int ls_main(int argc, char **argv);
787int ls_main(int argc, char **argv)
788{
789 struct dnode **dnd;
790 struct dnode **dnf;
791 struct dnode **dnp;
792 struct dnode *dn;
793 struct dnode *cur;
794 unsigned opt;
795 int nfiles = 0;
796 int dnfiles;
797 int dndirs;
798 int oi;
799 int ac;
800 int i;
801 char **av;
802 USE_FEATURE_AUTOWIDTH(char *tabstops_str = NULL;)
803 USE_FEATURE_AUTOWIDTH(char *terminal_width_str = NULL;)
804 USE_FEATURE_LS_COLOR(char *color_opt;)
805
806#if ENABLE_FEATURE_LS_TIMESTAMPS
807 time(&current_time_t);
808#endif
809
810 all_fmt = LIST_SHORT |
811 (ENABLE_FEATURE_LS_SORTFILES * (SORT_NAME | SORT_FORWARD));
812
813#if ENABLE_FEATURE_AUTOWIDTH
814 /* Obtain the terminal width */
815 get_terminal_width_height(STDIN_FILENO, &terminal_width, NULL);
816 /* Go one less... */
817 terminal_width--;
818#endif
819
820 /* process options */
821 USE_FEATURE_LS_COLOR(applet_long_options = ls_color_opt;)
822#if ENABLE_FEATURE_AUTOWIDTH
823 opt = getopt32(argv, ls_options, &tabstops_str, &terminal_width_str
824 USE_FEATURE_LS_COLOR(, &color_opt));
825 if (tabstops_str)
826 tabstops = xatou(tabstops_str);
827 if (terminal_width_str)
828 terminal_width = xatou(terminal_width_str);
829#else
830 opt = getopt32(argv, ls_options USE_FEATURE_LS_COLOR(, &color_opt));
831#endif
832 for (i = 0; opt_flags[i] != (1U<<31); i++) {
833 if (opt & (1 << i)) {
834 unsigned flags = opt_flags[i];
835
836 if (flags & LIST_MASK_TRIGGER)
837 all_fmt &= ~LIST_MASK;
838 if (flags & STYLE_MASK_TRIGGER)
839 all_fmt &= ~STYLE_MASK;
840 if (flags & SORT_MASK_TRIGGER)
841 all_fmt &= ~SORT_MASK;
842 if (flags & DISP_MASK_TRIGGER)
843 all_fmt &= ~DISP_MASK;
844 if (flags & TIME_MASK)
845 all_fmt &= ~TIME_MASK;
846 if (flags & LIST_CONTEXT)
847 all_fmt |= STYLE_SINGLE;
848 /* huh?? opt cannot be 'l' */
849 //if (LS_DISP_HR && opt == 'l')
850 // all_fmt &= ~LS_DISP_HR;
851 all_fmt |= flags;
852 }
853 }
854
855#if ENABLE_FEATURE_LS_COLOR
856 /* find color bit value - last position for short getopt */
857 if (ENABLE_FEATURE_LS_COLOR_IS_DEFAULT && isatty(STDOUT_FILENO)) {
858 char *p = getenv("LS_COLORS");
859 /* LS_COLORS is unset, or (not empty && not "none") ? */
860 if (!p || (p[0] && strcmp(p, "none")))
861 show_color = 1;
862 }
863 if (opt & (1 << i)) { /* next flag after short options */
864 if (!color_opt || !strcmp("always", color_opt))
865 show_color = 1;
866 else if (color_opt && !strcmp("never", color_opt))
867 show_color = 0;
868 else if (color_opt && !strcmp("auto", color_opt) && isatty(STDOUT_FILENO))
869 show_color = 1;
870 }
871#endif
872
873 /* sort out which command line options take precedence */
874 if (ENABLE_FEATURE_LS_RECURSIVE && (all_fmt & DISP_NOLIST))
875 all_fmt &= ~DISP_RECURSIVE; /* no recurse if listing only dir */
876 if (ENABLE_FEATURE_LS_TIMESTAMPS && ENABLE_FEATURE_LS_SORTFILES) {
877 if (all_fmt & TIME_CHANGE)
878 all_fmt = (all_fmt & ~SORT_MASK) | SORT_CTIME;
879 if (all_fmt & TIME_ACCESS)
880 all_fmt = (all_fmt & ~SORT_MASK) | SORT_ATIME;
881 }
882 if ((all_fmt & STYLE_MASK) != STYLE_LONG) /* only for long list */
883 all_fmt &= ~(LIST_ID_NUMERIC|LIST_FULLTIME|LIST_ID_NAME|LIST_ID_NUMERIC);
884 if (ENABLE_FEATURE_LS_USERNAME)
885 if ((all_fmt & STYLE_MASK) == STYLE_LONG && (all_fmt & LIST_ID_NUMERIC))
886 all_fmt &= ~LIST_ID_NAME; /* don't list names if numeric uid */
887
888 /* choose a display format */
889 if (!(all_fmt & STYLE_MASK))
890 all_fmt |= (isatty(STDOUT_FILENO) ? STYLE_COLUMNS : STYLE_SINGLE);
891
892 /*
893 * when there are no cmd line args we have to supply a default "." arg.
894 * we will create a second argv array, "av" that will hold either
895 * our created "." arg, or the real cmd line args. The av array
896 * just holds the pointers- we don't move the date the pointers
897 * point to.
898 */
899 ac = argc - optind; /* how many cmd line args are left */
900 if (ac < 1) {
901 static const char *const dotdir[] = { "." };
902
903 av = (char **) dotdir;
904 ac = 1;
905 } else {
906 av = argv + optind;
907 }
908
909 /* now, everything is in the av array */
910 if (ac > 1)
911 all_fmt |= DISP_DIRNAME; /* 2 or more items? label directories */
912
913 /* stuff the command line file names into a dnode array */
914 dn = NULL;
915 for (oi = 0; oi < ac; oi++) {
916 /* ls w/o -l follows links on command line */
917 cur = my_stat(av[oi], av[oi], !(all_fmt & STYLE_LONG));
918 if (!cur)
919 continue;
920 cur->allocated = 0;
921 cur->next = dn;
922 dn = cur;
923 nfiles++;
924 }
925
926 /* now that we know how many files there are
927 * allocate memory for an array to hold dnode pointers
928 */
929 dnp = dnalloc(nfiles);
930 for (i = 0, cur = dn; i < nfiles; i++) {
931 dnp[i] = cur; /* save pointer to node in array */
932 cur = cur->next;
933 }
934
935 if (all_fmt & DISP_NOLIST) {
936 dnsort(dnp, nfiles);
937 if (nfiles > 0)
938 showfiles(dnp, nfiles);
939 } else {
940 dnd = splitdnarray(dnp, nfiles, SPLIT_DIR);
941 dnf = splitdnarray(dnp, nfiles, SPLIT_FILE);
942 dndirs = countdirs(dnp, nfiles);
943 dnfiles = nfiles - dndirs;
944 if (dnfiles > 0) {
945 dnsort(dnf, dnfiles);
946 showfiles(dnf, dnfiles);
947 if (ENABLE_FEATURE_CLEAN_UP)
948 free(dnf);
949 }
950 if (dndirs > 0) {
951 dnsort(dnd, dndirs);
952 showdirs(dnd, dndirs, dnfiles == 0);
953 if (ENABLE_FEATURE_CLEAN_UP)
954 free(dnd);
955 }
956 }
957 if (ENABLE_FEATURE_CLEAN_UP)
958 dfree(dnp, nfiles);
959 return status;
960}
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