1 /* vi: set sw=4 ts=4: */
3 * tiny-ls.c version 0.1.0: A minimalist 'ls'
4 * Copyright (C) 1996 Brian Candler <B.Candler@pobox.com>
6 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
9 /* [date unknown. Perhaps before year 2000]
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.
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
20 * 1. hidden files can make column width too large
22 * NON-OPTIMAL BEHAVIOUR:
23 * 1. autowidth reads directories twice
24 * 2. if you do a short directory listing without filetype characters
25 * appended, there's no need to stat each one
27 * 1. requires lstat (BSD) - how do you do it without?
30 * ls sorts listing now, and supports almost all options.
36 /* This is a NOEXEC applet. Be very careful! */
40 /* ftpd uses ls, and without timestamps Mozilla won't understand
43 # undef CONFIG_FEATURE_LS_TIMESTAMPS
44 # undef ENABLE_FEATURE_LS_TIMESTAMPS
45 # undef IF_FEATURE_LS_TIMESTAMPS
46 # undef IF_NOT_FEATURE_LS_TIMESTAMPS
47 # define CONFIG_FEATURE_LS_TIMESTAMPS 1
48 # define ENABLE_FEATURE_LS_TIMESTAMPS 1
49 # define IF_FEATURE_LS_TIMESTAMPS(...) __VA_ARGS__
50 # define IF_NOT_FEATURE_LS_TIMESTAMPS(...)
55 TERMINAL_WIDTH = 80, /* use 79 if terminal has linefold bug */
56 COLUMN_GAP = 2, /* includes the file type char */
58 /* what is the overall style of the listing */
59 STYLE_COLUMNS = 1 << 21, /* fill columns */
60 STYLE_LONG = 2 << 21, /* one record per line, extended info */
61 STYLE_SINGLE = 3 << 21, /* one record per line */
62 STYLE_MASK = STYLE_SINGLE,
64 /* 51306 lrwxrwxrwx 1 root root 2 May 11 01:43 /bin/view -> vi* */
65 /* what file information will be listed */
68 LIST_MODEBITS = 1 << 2,
70 LIST_ID_NAME = 1 << 4,
71 LIST_ID_NUMERIC = 1 << 5,
72 LIST_CONTEXT = 1 << 6,
74 //LIST_DEV = 1 << 8, - unused, synonym to LIST_SIZE
75 LIST_DATE_TIME = 1 << 9,
76 LIST_FULLTIME = 1 << 10,
77 LIST_FILENAME = 1 << 11,
78 LIST_SYMLINK = 1 << 12,
79 LIST_FILETYPE = 1 << 13,
81 LIST_MASK = (LIST_EXEC << 1) - 1,
83 /* what files will be displayed */
84 DISP_DIRNAME = 1 << 15, /* 2 or more items? label directories */
85 DISP_HIDDEN = 1 << 16, /* show filenames starting with . */
86 DISP_DOT = 1 << 17, /* show . and .. */
87 DISP_NOLIST = 1 << 18, /* show directory as itself, not contents */
88 DISP_RECURSIVE = 1 << 19, /* show directory and everything below it */
89 DISP_ROWS = 1 << 20, /* print across rows */
90 DISP_MASK = ((DISP_ROWS << 1) - 1) & ~(DISP_DIRNAME - 1),
92 /* how will the files be sorted (CONFIG_FEATURE_LS_SORTFILES) */
93 SORT_FORWARD = 0, /* sort in reverse order */
94 SORT_REVERSE = 1 << 27, /* sort in reverse order */
96 SORT_NAME = 0, /* sort by file name */
97 SORT_SIZE = 1 << 28, /* sort by file size */
98 SORT_ATIME = 2 << 28, /* sort by last access time */
99 SORT_CTIME = 3 << 28, /* sort by last change time */
100 SORT_MTIME = 4 << 28, /* sort by last modification time */
101 SORT_VERSION = 5 << 28, /* sort by version */
102 SORT_EXT = 6 << 28, /* sort by file name extension */
103 SORT_DIR = 7 << 28, /* sort by file or directory */
104 SORT_MASK = (7 << 28) * ENABLE_FEATURE_LS_SORTFILES,
106 /* which of the three times will be used */
107 TIME_CHANGE = (1 << 23) * ENABLE_FEATURE_LS_TIMESTAMPS,
108 TIME_ACCESS = (1 << 24) * ENABLE_FEATURE_LS_TIMESTAMPS,
109 TIME_MASK = (3 << 23) * ENABLE_FEATURE_LS_TIMESTAMPS,
111 FOLLOW_LINKS = (1 << 25) * ENABLE_FEATURE_LS_FOLLOWLINKS,
113 LS_DISP_HR = (1 << 26) * ENABLE_FEATURE_HUMAN_READABLE,
115 LIST_SHORT = LIST_FILENAME,
116 LIST_LONG = LIST_MODEBITS | LIST_NLINKS | LIST_ID_NAME | LIST_SIZE | \
117 LIST_DATE_TIME | LIST_FILENAME | LIST_SYMLINK,
124 /* "[-]Cadil1", POSIX mandated options, busybox always supports */
125 /* "[-]gnsx", POSIX non-mandated options, busybox always supports */
126 /* "[-]Q" GNU option? busybox always supports */
127 /* "[-]Ak" GNU options, busybox always supports */
128 /* "[-]FLRctur", POSIX mandated options, busybox optionally supports */
129 /* "[-]p", POSIX non-mandated options, busybox optionally supports */
130 /* "[-]SXvThw", GNU options, busybox optionally supports */
131 /* "[-]K", SELinux mandated options, busybox optionally supports */
132 /* "[-]e", I think we made this one up */
133 static const char ls_options[] ALIGN1 =
134 "Cadil1gnsxQAk" /* 13 opts, total 13 */
135 IF_FEATURE_LS_TIMESTAMPS("cetu") /* 4, 17 */
136 IF_FEATURE_LS_SORTFILES("SXrv") /* 4, 21 */
137 IF_FEATURE_LS_FILETYPES("Fp") /* 2, 23 */
138 IF_FEATURE_LS_FOLLOWLINKS("L") /* 1, 24 */
139 IF_FEATURE_LS_RECURSIVE("R") /* 1, 25 */
140 IF_FEATURE_HUMAN_READABLE("h") /* 1, 26 */
141 IF_SELINUX("KZ") /* 2, 28 */
142 IF_FEATURE_AUTOWIDTH("T:w:") /* 2, 30 */
159 + 4 * ENABLE_FEATURE_LS_TIMESTAMPS
160 + 4 * ENABLE_FEATURE_LS_SORTFILES
161 + 2 * ENABLE_FEATURE_LS_FILETYPES
162 + 1 * ENABLE_FEATURE_LS_FOLLOWLINKS
163 + 1 * ENABLE_FEATURE_LS_RECURSIVE
164 + 1 * ENABLE_FEATURE_HUMAN_READABLE
166 + 2 * ENABLE_FEATURE_AUTOWIDTH,
167 OPT_color = 1 << OPTBIT_color,
171 LIST_MASK_TRIGGER = 0,
172 STYLE_MASK_TRIGGER = STYLE_MASK,
173 DISP_MASK_TRIGGER = DISP_ROWS,
174 SORT_MASK_TRIGGER = SORT_MASK,
177 /* TODO: simple toggles may be stored as OPT_xxx bits instead */
178 static const unsigned opt_flags[] = {
179 LIST_SHORT | STYLE_COLUMNS, /* C */
180 DISP_HIDDEN | DISP_DOT, /* a */
183 LIST_LONG | STYLE_LONG, /* l - remember LS_DISP_HR in mask! */
184 LIST_SHORT | STYLE_SINGLE, /* 1 */
185 0, /* g (don't show group) - handled via OPT_g */
186 LIST_ID_NUMERIC, /* n */
189 0, /* Q (quote filename) - handled via OPT_Q */
191 ENABLE_SELINUX * LIST_CONTEXT, /* k (ignored if !SELINUX) */
192 #if ENABLE_FEATURE_LS_TIMESTAMPS
193 TIME_CHANGE | (ENABLE_FEATURE_LS_SORTFILES * SORT_CTIME), /* c */
194 LIST_FULLTIME, /* e */
195 ENABLE_FEATURE_LS_SORTFILES * SORT_MTIME, /* t */
196 TIME_ACCESS | (ENABLE_FEATURE_LS_SORTFILES * SORT_ATIME), /* u */
198 #if ENABLE_FEATURE_LS_SORTFILES
201 SORT_REVERSE, /* r */
202 SORT_VERSION, /* v */
204 #if ENABLE_FEATURE_LS_FILETYPES
205 LIST_FILETYPE | LIST_EXEC, /* F */
206 LIST_FILETYPE, /* p */
208 #if ENABLE_FEATURE_LS_FOLLOWLINKS
209 FOLLOW_LINKS, /* L */
211 #if ENABLE_FEATURE_LS_RECURSIVE
212 DISP_RECURSIVE, /* R */
214 #if ENABLE_FEATURE_HUMAN_READABLE
218 LIST_MODEBITS|LIST_NLINKS|LIST_CONTEXT|LIST_SIZE|LIST_DATE_TIME, /* K */
221 LIST_MODEBITS|LIST_ID_NAME|LIST_CONTEXT, /* Z */
224 /* options after Z are not processed through opt_flags:
231 * a directory entry and its stat info are stored here
234 const char *name; /* the dir entry name */
235 const char *fullname; /* the dir entry name */
236 struct dnode *next; /* point at the next node */
237 smallint fname_allocated;
238 struct stat dstat; /* the file stat info */
239 IF_SELINUX(security_context_t sid;)
243 #if ENABLE_FEATURE_LS_COLOR
248 #if ENABLE_FEATURE_AUTOWIDTH
249 unsigned tabstops; // = COLUMN_GAP;
250 unsigned terminal_width; // = TERMINAL_WIDTH;
252 #if ENABLE_FEATURE_LS_TIMESTAMPS
253 /* Do time() just once. Saves one syscall per file for "ls -l" */
254 time_t current_time_t;
257 #define G (*(struct globals*)&bb_common_bufsiz1)
258 #if ENABLE_FEATURE_LS_COLOR
259 # define show_color (G.show_color )
261 enum { show_color = 0 };
263 #define exit_code (G.exit_code )
264 #define all_fmt (G.all_fmt )
265 #if ENABLE_FEATURE_AUTOWIDTH
266 # define tabstops (G.tabstops )
267 # define terminal_width (G.terminal_width)
270 tabstops = COLUMN_GAP,
271 terminal_width = TERMINAL_WIDTH,
274 #define current_time_t (G.current_time_t)
275 #define INIT_G() do { \
276 /* we have to zero it out because of NOEXEC */ \
277 memset(&G, 0, sizeof(G)); \
278 IF_FEATURE_AUTOWIDTH(tabstops = COLUMN_GAP;) \
279 IF_FEATURE_AUTOWIDTH(terminal_width = TERMINAL_WIDTH;) \
280 IF_FEATURE_LS_TIMESTAMPS(time(¤t_time_t);) \
284 static struct dnode *my_stat(const char *fullname, const char *name, int force_follow)
288 IF_SELINUX(security_context_t sid = NULL;)
290 if ((all_fmt & FOLLOW_LINKS) || force_follow) {
292 if (is_selinux_enabled()) {
293 getfilecon(fullname, &sid);
296 if (stat(fullname, &dstat)) {
297 bb_simple_perror_msg(fullname);
298 exit_code = EXIT_FAILURE;
303 if (is_selinux_enabled()) {
304 lgetfilecon(fullname, &sid);
307 if (lstat(fullname, &dstat)) {
308 bb_simple_perror_msg(fullname);
309 exit_code = EXIT_FAILURE;
314 cur = xmalloc(sizeof(*cur));
315 cur->fullname = fullname;
318 IF_SELINUX(cur->sid = sid;)
322 /* FYI type values: 1:fifo 2:char 4:dir 6:blk 8:file 10:link 12:socket
323 * (various wacky OSes: 13:Sun door 14:BSD whiteout 5:XENIX named file
324 * 3/7:multiplexed char/block device)
325 * and we use 0 for unknown and 15 for executables (see below) */
326 #define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
327 #define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
328 #define APPCHAR(mode) ("\0|\0\0/\0\0\0\0\0@\0=\0\0\0" [TYPEINDEX(mode)])
329 /* 036 black foreground 050 black background
330 037 red foreground 051 red background
331 040 green foreground 052 green background
332 041 brown foreground 053 brown background
333 042 blue foreground 054 blue background
334 043 magenta (purple) foreground 055 magenta background
335 044 cyan (light blue) foreground 056 cyan background
336 045 gray foreground 057 white background
338 #define COLOR(mode) ( \
339 /*un fi chr dir blk file link sock exe */ \
340 "\037\043\043\045\042\045\043\043\000\045\044\045\043\045\045\040" \
342 /* Select normal (0) [actually "reset all"] or bold (1)
343 * (other attributes are 2:dim 4:underline 5:blink 7:reverse,
344 * let's use 7 for "impossible" types, just for fun)
345 * Note: coreutils 6.9 uses inverted red for setuid binaries.
347 #define ATTR(mode) ( \
348 /*un fi chr dir blk file link sock exe */ \
349 "\01\00\01\07\01\07\01\07\00\07\01\07\01\07\07\01" \
352 #if ENABLE_FEATURE_LS_COLOR
353 /* mode of zero is interpreted as "unknown" (stat failed) */
354 static char fgcolor(mode_t mode)
356 if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
357 return COLOR(0xF000); /* File is executable ... */
360 static char bold(mode_t mode)
362 if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
363 return ATTR(0xF000); /* File is executable ... */
368 #if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR
369 static char append_char(mode_t mode)
371 if (!(all_fmt & LIST_FILETYPE))
375 if (!(all_fmt & LIST_EXEC))
377 if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
379 return APPCHAR(mode);
383 static unsigned count_dirs(struct dnode **dn, int which)
395 if (!S_ISDIR((*dn)->dstat.st_mode))
398 if (which != SPLIT_SUBDIR /* if not requested to skip . / .. */
399 /* or if it's not . or .. */
400 || name[0] != '.' || (name[1] && (name[1] != '.' || name[2]))
405 return which != SPLIT_FILE ? dirs : all - dirs;
408 /* get memory to hold an array of pointers */
409 static struct dnode **dnalloc(unsigned num)
414 num++; /* so that we have terminating NULL */
415 return xzalloc(num * sizeof(struct dnode *));
418 #if ENABLE_FEATURE_LS_RECURSIVE
419 static void dfree(struct dnode **dnp)
426 for (i = 0; dnp[i]; i++) {
427 struct dnode *cur = dnp[i];
428 if (cur->fname_allocated)
429 free((char*)cur->fullname);
435 #define dfree(...) ((void)0)
438 /* Returns NULL-terminated malloced vector of pointers (or NULL) */
439 static struct dnode **splitdnarray(struct dnode **dn, int which)
447 /* count how many dirs or files there are */
448 dncnt = count_dirs(dn, which);
450 /* allocate a file array and a dir array */
451 dnp = dnalloc(dncnt);
453 /* copy the entrys into the file or dir array */
454 for (d = 0; *dn; dn++) {
455 if (S_ISDIR((*dn)->dstat.st_mode)) {
458 if (!(which & (SPLIT_DIR|SPLIT_SUBDIR)))
461 if ((which & SPLIT_DIR)
462 || name[0]!='.' || (name[1] && (name[1]!='.' || name[2]))
466 } else if (!(which & (SPLIT_DIR|SPLIT_SUBDIR))) {
473 #if ENABLE_FEATURE_LS_SORTFILES
474 static int sortcmp(const void *a, const void *b)
476 struct dnode *d1 = *(struct dnode **)a;
477 struct dnode *d2 = *(struct dnode **)b;
478 unsigned sort_opts = all_fmt & SORT_MASK;
481 dif = 0; /* assume SORT_NAME */
482 // TODO: use pre-initialized function pointer
483 // instead of branch forest
484 if (sort_opts == SORT_SIZE) {
485 dif = (d2->dstat.st_size - d1->dstat.st_size);
486 } else if (sort_opts == SORT_ATIME) {
487 dif = (d2->dstat.st_atime - d1->dstat.st_atime);
488 } else if (sort_opts == SORT_CTIME) {
489 dif = (d2->dstat.st_ctime - d1->dstat.st_ctime);
490 } else if (sort_opts == SORT_MTIME) {
491 dif = (d2->dstat.st_mtime - d1->dstat.st_mtime);
492 } else if (sort_opts == SORT_DIR) {
493 dif = S_ISDIR(d2->dstat.st_mode) - S_ISDIR(d1->dstat.st_mode);
494 /* } else if (sort_opts == SORT_VERSION) { */
495 /* } else if (sort_opts == SORT_EXT) { */
498 /* sort by name, or tie_breaker for other sorts */
499 if (ENABLE_LOCALE_SUPPORT)
500 dif = strcoll(d1->name, d2->name);
502 dif = strcmp(d1->name, d2->name);
505 /* Make dif fit into an int */
506 if (sizeof(dif) > sizeof(int)) {
507 enum { BITS_TO_SHIFT = 8 * (sizeof(dif) - sizeof(int)) };
508 /* shift leaving only "int" worth of bits */
510 dif = 1 | (int)((uoff_t)dif >> BITS_TO_SHIFT);
514 return (all_fmt & SORT_REVERSE) ? -(int)dif : (int)dif;
517 static void dnsort(struct dnode **dn, int size)
519 qsort(dn, size, sizeof(*dn), sortcmp);
522 #define dnsort(dn, size) ((void)0)
526 static unsigned calc_name_len(const char *name)
531 // TODO: quote tab as \t, etc, if -Q
532 name = printable_string(&uni_stat, name);
534 if (!(option_mask32 & OPT_Q)) {
535 return uni_stat.unicode_width;
538 len = 2 + uni_stat.unicode_width;
540 if (*name == '"' || *name == '\\') {
549 /* Return the number of used columns.
550 * Note that only STYLE_COLUMNS uses return value.
551 * STYLE_SINGLE and STYLE_LONG don't care.
552 * coreutils 7.2 also supports:
553 * ls -b (--escape) = octal escapes (although it doesn't look like working)
554 * ls -N (--literal) = not escape at all
556 static unsigned print_name(const char *name)
561 // TODO: quote tab as \t, etc, if -Q
562 name = printable_string(&uni_stat, name);
564 if (!(option_mask32 & OPT_Q)) {
566 return uni_stat.unicode_width;
569 len = 2 + uni_stat.unicode_width;
572 if (*name == '"' || *name == '\\') {
583 /* Return the number of used columns.
584 * Note that only STYLE_COLUMNS uses return value,
585 * STYLE_SINGLE and STYLE_LONG don't care.
587 static NOINLINE unsigned list_single(const struct dnode *dn)
590 char *lpath = lpath; /* for compiler */
591 #if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR
597 if (dn->fullname == NULL)
601 #if ENABLE_FEATURE_LS_FILETYPES
602 append = append_char(dn->dstat.st_mode);
605 /* Do readlink early, so that if it fails, error message
606 * does not appear *inside* the "ls -l" line */
607 if (all_fmt & LIST_SYMLINK)
608 if (S_ISLNK(dn->dstat.st_mode))
609 lpath = xmalloc_readlink_or_warn(dn->fullname);
611 if (all_fmt & LIST_INO)
612 column += printf("%7llu ", (long long) dn->dstat.st_ino);
613 if (all_fmt & LIST_BLOCKS)
614 column += printf("%4"OFF_FMT"u ", (off_t) (dn->dstat.st_blocks >> 1));
615 if (all_fmt & LIST_MODEBITS)
616 column += printf("%-10s ", (char *) bb_mode_string(dn->dstat.st_mode));
617 if (all_fmt & LIST_NLINKS)
618 column += printf("%4lu ", (long) dn->dstat.st_nlink);
619 #if ENABLE_FEATURE_LS_USERNAME
620 if (all_fmt & LIST_ID_NAME) {
621 if (option_mask32 & OPT_g) {
622 column += printf("%-8.8s ",
623 get_cached_username(dn->dstat.st_uid));
625 column += printf("%-8.8s %-8.8s ",
626 get_cached_username(dn->dstat.st_uid),
627 get_cached_groupname(dn->dstat.st_gid));
631 if (all_fmt & LIST_ID_NUMERIC) {
632 if (option_mask32 & OPT_g)
633 column += printf("%-8u ", (int) dn->dstat.st_uid);
635 column += printf("%-8u %-8u ",
636 (int) dn->dstat.st_uid,
637 (int) dn->dstat.st_gid);
639 if (all_fmt & (LIST_SIZE /*|LIST_DEV*/ )) {
640 if (S_ISBLK(dn->dstat.st_mode) || S_ISCHR(dn->dstat.st_mode)) {
641 column += printf("%4u, %3u ",
642 (int) major(dn->dstat.st_rdev),
643 (int) minor(dn->dstat.st_rdev));
645 if (all_fmt & LS_DISP_HR) {
646 column += printf("%"HUMAN_READABLE_MAX_WIDTH_STR"s ",
647 /* print st_size, show one fractional, use suffixes */
648 make_human_readable_str(dn->dstat.st_size, 1, 0)
651 column += printf("%9"OFF_FMT"u ", (off_t) dn->dstat.st_size);
655 #if ENABLE_FEATURE_LS_TIMESTAMPS
656 if (all_fmt & (LIST_FULLTIME|LIST_DATE_TIME)) {
658 time_t ttime = dn->dstat.st_mtime;
659 if (all_fmt & TIME_ACCESS)
660 ttime = dn->dstat.st_atime;
661 if (all_fmt & TIME_CHANGE)
662 ttime = dn->dstat.st_ctime;
663 filetime = ctime(&ttime);
664 /* filetime's format: "Wed Jun 30 21:49:08 1993\n" */
665 if (all_fmt & LIST_FULLTIME)
666 column += printf("%.24s ", filetime);
667 else { /* LIST_DATE_TIME */
668 /* current_time_t ~== time(NULL) */
669 time_t age = current_time_t - ttime;
670 printf("%.6s ", filetime + 4); /* "Jun 30" */
671 if (age < 3600L * 24 * 365 / 2 && age > -15 * 60) {
672 /* hh:mm if less than 6 months old */
673 printf("%.5s ", filetime + 11);
674 } else { /* year. buggy if year > 9999 ;) */
675 printf(" %.4s ", filetime + 20);
682 if (all_fmt & LIST_CONTEXT) {
683 column += printf("%-32s ", dn->sid ? dn->sid : "unknown");
687 if (all_fmt & LIST_FILENAME) {
688 #if ENABLE_FEATURE_LS_COLOR
690 info.st_mode = 0; /* for fgcolor() */
691 lstat(dn->fullname, &info);
692 printf("\033[%u;%um", bold(info.st_mode),
693 fgcolor(info.st_mode));
696 column += print_name(dn->name);
701 if (all_fmt & LIST_SYMLINK) {
702 if (S_ISLNK(dn->dstat.st_mode) && lpath) {
704 #if ENABLE_FEATURE_LS_FILETYPES || ENABLE_FEATURE_LS_COLOR
705 #if ENABLE_FEATURE_LS_COLOR
706 info.st_mode = 0; /* for fgcolor() */
708 if (stat(dn->fullname, &info) == 0) {
709 append = append_char(info.st_mode);
712 #if ENABLE_FEATURE_LS_COLOR
714 printf("\033[%u;%um", bold(info.st_mode),
715 fgcolor(info.st_mode));
718 column += print_name(lpath) + 4;
725 #if ENABLE_FEATURE_LS_FILETYPES
726 if (all_fmt & LIST_FILETYPE) {
737 static void showfiles(struct dnode **dn, unsigned nfiles)
739 unsigned i, ncols, nrows, row, nc;
741 unsigned nexttab = 0;
742 unsigned column_width = 0; /* used only by STYLE_COLUMNS */
744 if (all_fmt & STYLE_LONG) { /* STYLE_LONG or STYLE_SINGLE */
747 /* find the longest file name, use that as the column width */
748 for (i = 0; dn[i]; i++) {
749 int len = calc_name_len(dn[i]->name);
750 if (column_width < len)
753 column_width += tabstops +
754 IF_SELINUX( ((all_fmt & LIST_CONTEXT) ? 33 : 0) + )
755 ((all_fmt & LIST_INO) ? 8 : 0) +
756 ((all_fmt & LIST_BLOCKS) ? 5 : 0);
757 ncols = (int) (terminal_width / column_width);
761 nrows = nfiles / ncols;
762 if (nrows * ncols < nfiles)
763 nrows++; /* round up fractionals */
769 for (row = 0; row < nrows; row++) {
770 for (nc = 0; nc < ncols; nc++) {
771 /* reach into the array based on the column and row */
772 if (all_fmt & DISP_ROWS)
773 i = (row * ncols) + nc; /* display across row */
775 i = (nc * nrows) + row; /* display by column */
779 printf("%*s", nexttab, "");
782 nexttab = column + column_width;
783 column += list_single(dn[i]);
793 /* http://www.opengroup.org/onlinepubs/9699919799/utilities/ls.html
794 * If any of the -l, -n, -s options is specified, each list
795 * of files within the directory shall be preceded by a
796 * status line indicating the number of file system blocks
797 * occupied by files in the directory in 512-byte units if
798 * the -k option is not specified, or 1024-byte units if the
799 * -k option is specified, rounded up to the next integral
802 /* by Jorgen Overgaard (jorgen AT antistaten.se) */
803 static off_t calculate_blocks(struct dnode **dn)
808 /* st_blocks is in 512 byte blocks */
809 blocks += (*dn)->dstat.st_blocks;
814 /* Even though standard says use 512 byte blocks, coreutils use 1k */
815 /* Actually, we round up by calculating (blocks + 1) / 2,
816 * "+ 1" was done when we initialized blocks to 1 */
822 static struct dnode **list_dir(const char *, unsigned *);
824 static void showdirs(struct dnode **dn, int first)
828 struct dnode **subdnp;
832 if (dn == NULL || ndirs < 1) {
838 if (all_fmt & (DISP_DIRNAME | DISP_RECURSIVE)) {
842 printf("%s:\n", (*dn)->fullname);
844 subdnp = list_dir((*dn)->fullname, &nfiles);
846 if ((all_fmt & STYLE_MASK) == STYLE_LONG)
847 printf("total %"OFF_FMT"u\n", calculate_blocks(subdnp));
850 /* list all files at this level */
851 dnsort(subdnp, nfiles);
852 showfiles(subdnp, nfiles);
853 if (ENABLE_FEATURE_LS_RECURSIVE
854 && (all_fmt & DISP_RECURSIVE)
856 /* recursive - list the sub-dirs */
857 dnd = splitdnarray(subdnp, SPLIT_SUBDIR);
858 dndirs = count_dirs(subdnp, SPLIT_SUBDIR);
862 /* free the array of dnode pointers to the dirs */
866 /* free the dnodes and the fullname mem */
873 /* Returns NULL-terminated malloced vector of pointers (or NULL) */
874 static struct dnode **list_dir(const char *path, unsigned *nfiles_p)
876 struct dnode *dn, *cur, **dnp;
877 struct dirent *entry;
887 dir = warn_opendir(path);
889 exit_code = EXIT_FAILURE;
890 return NULL; /* could not open the dir */
894 while ((entry = readdir(dir)) != NULL) {
897 /* are we going to list the file- it may be . or .. or a hidden file */
898 if (entry->d_name[0] == '.') {
899 if ((!entry->d_name[1] || (entry->d_name[1] == '.' && !entry->d_name[2]))
900 && !(all_fmt & DISP_DOT)
904 if (!(all_fmt & DISP_HIDDEN))
907 fullname = concat_path_file(path, entry->d_name);
908 cur = my_stat(fullname, bb_basename(fullname), 0);
913 cur->fname_allocated = 1;
923 /* now that we know how many files there are
924 * allocate memory for an array to hold dnode pointers
927 dnp = dnalloc(nfiles);
928 for (i = 0; /* i < nfiles - detected via !dn below */; i++) {
929 dnp[i] = dn; /* save pointer to node in array */
939 int ls_main(int argc UNUSED_PARAM, char **argv)
951 #if ENABLE_FEATURE_LS_COLOR
952 /* colored LS support by JaWi, janwillem.janssen@lxtreme.nl */
955 * ls: invalid argument 'BOGUS' for '--color'
956 * Valid arguments are:
957 * 'always', 'yes', 'force'
958 * 'never', 'no', 'none'
959 * 'auto', 'tty', 'if-tty'
960 * (and substrings: "--color=alwa" work too)
962 static const char ls_longopts[] ALIGN1 =
963 "color\0" Optional_argument "\xff"; /* no short equivalent */
964 static const char color_str[] ALIGN1 =
965 "always\0""yes\0""force\0"
966 "auto\0""tty\0""if-tty\0";
967 /* need to initialize since --color has _an optional_ argument */
968 const char *color_opt = color_str; /* "always" */
975 all_fmt = LIST_SHORT |
976 (ENABLE_FEATURE_LS_SORTFILES * (SORT_NAME | SORT_FORWARD));
978 #if ENABLE_FEATURE_AUTOWIDTH
979 /* obtain the terminal width */
980 get_terminal_width_height(STDIN_FILENO, &terminal_width, NULL);
985 /* process options */
986 IF_FEATURE_LS_COLOR(applet_long_options = ls_longopts;)
987 #if ENABLE_FEATURE_AUTOWIDTH
988 opt_complementary = "T+:w+"; /* -T N, -w N */
989 opt = getopt32(argv, ls_options, &tabstops, &terminal_width
990 IF_FEATURE_LS_COLOR(, &color_opt));
992 opt = getopt32(argv, ls_options IF_FEATURE_LS_COLOR(, &color_opt));
994 for (i = 0; opt_flags[i] != (1U<<31); i++) {
995 if (opt & (1 << i)) {
996 unsigned flags = opt_flags[i];
998 if (flags & LIST_MASK_TRIGGER)
999 all_fmt &= ~LIST_MASK;
1000 if (flags & STYLE_MASK_TRIGGER)
1001 all_fmt &= ~STYLE_MASK;
1002 if (flags & SORT_MASK_TRIGGER)
1003 all_fmt &= ~SORT_MASK;
1004 if (flags & DISP_MASK_TRIGGER)
1005 all_fmt &= ~DISP_MASK;
1006 if (flags & TIME_MASK)
1007 all_fmt &= ~TIME_MASK;
1008 if (flags & LIST_CONTEXT)
1009 all_fmt |= STYLE_SINGLE;
1010 /* huh?? opt cannot be 'l' */
1011 //if (LS_DISP_HR && opt == 'l')
1012 // all_fmt &= ~LS_DISP_HR;
1017 #if ENABLE_FEATURE_LS_COLOR
1018 /* find color bit value - last position for short getopt */
1019 if (ENABLE_FEATURE_LS_COLOR_IS_DEFAULT && isatty(STDOUT_FILENO)) {
1020 char *p = getenv("LS_COLORS");
1021 /* LS_COLORS is unset, or (not empty && not "none") ? */
1022 if (!p || (p[0] && strcmp(p, "none") != 0))
1025 if (opt & OPT_color) {
1026 if (color_opt[0] == 'n')
1028 else switch (index_in_substrings(color_str, color_opt)) {
1032 if (isatty(STDOUT_FILENO)) {
1042 /* sort out which command line options take precedence */
1043 if (ENABLE_FEATURE_LS_RECURSIVE && (all_fmt & DISP_NOLIST))
1044 all_fmt &= ~DISP_RECURSIVE; /* no recurse if listing only dir */
1045 if (ENABLE_FEATURE_LS_TIMESTAMPS && ENABLE_FEATURE_LS_SORTFILES) {
1046 if (all_fmt & TIME_CHANGE)
1047 all_fmt = (all_fmt & ~SORT_MASK) | SORT_CTIME;
1048 if (all_fmt & TIME_ACCESS)
1049 all_fmt = (all_fmt & ~SORT_MASK) | SORT_ATIME;
1051 if ((all_fmt & STYLE_MASK) != STYLE_LONG) /* only for long list */
1052 all_fmt &= ~(LIST_ID_NUMERIC|LIST_FULLTIME|LIST_ID_NAME|LIST_ID_NUMERIC);
1053 if (ENABLE_FEATURE_LS_USERNAME)
1054 if ((all_fmt & STYLE_MASK) == STYLE_LONG && (all_fmt & LIST_ID_NUMERIC))
1055 all_fmt &= ~LIST_ID_NAME; /* don't list names if numeric uid */
1057 /* choose a display format */
1058 if (!(all_fmt & STYLE_MASK))
1059 all_fmt |= (isatty(STDOUT_FILENO) ? STYLE_COLUMNS : STYLE_SINGLE);
1063 *--argv = (char*)".";
1066 all_fmt |= DISP_DIRNAME; /* 2 or more items? label directories */
1068 /* stuff the command line file names into a dnode array */
1072 /* NB: follow links on command line unless -l or -s */
1073 cur = my_stat(*argv, *argv, !(all_fmt & (STYLE_LONG|LIST_BLOCKS)));
1077 cur->fname_allocated = 0;
1083 /* nfiles _may_ be 0 here - try "ls doesnt_exist" */
1087 /* now that we know how many files there are
1088 * allocate memory for an array to hold dnode pointers
1090 dnp = dnalloc(nfiles);
1091 for (i = 0; /* i < nfiles - detected via !dn below */; i++) {
1092 dnp[i] = dn; /* save pointer to node in array */
1098 if (all_fmt & DISP_NOLIST) {
1099 dnsort(dnp, nfiles);
1100 showfiles(dnp, nfiles);
1102 dnd = splitdnarray(dnp, SPLIT_DIR);
1103 dnf = splitdnarray(dnp, SPLIT_FILE);
1104 dndirs = count_dirs(dnp, SPLIT_DIR);
1105 dnfiles = nfiles - dndirs;
1107 dnsort(dnf, dnfiles);
1108 showfiles(dnf, dnfiles);
1109 if (ENABLE_FEATURE_CLEAN_UP)
1113 dnsort(dnd, dndirs);
1114 showdirs(dnd, dnfiles == 0);
1115 if (ENABLE_FEATURE_CLEAN_UP)
1119 if (ENABLE_FEATURE_CLEAN_UP)