2 * Copyright (c) 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
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9 * modification, are permitted provided that the following conditions
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12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * @(#) Copyright (c) 1989, 1993, 1994 The Regents of the University of California. All rights reserved.
33 * @(#)ls.c 8.5 (Berkeley) 4/2/94
34 * $FreeBSD: src/bin/ls/ls.c,v 1.78 2004/06/08 09:30:10 das Exp $
35 * $DragonFly: src/bin/ls/ls.c,v 1.15 2006/01/12 13:43:10 corecode Exp $
38 #include <sys/types.h>
40 #include <sys/ioctl.h>
64 * Upward approximation of the maximum number of characters needed to
65 * represent a value of integral type t as a string, excluding the
66 * NUL terminator, with provision for a sign.
68 #define STRBUF_SIZEOF(t) (1 + CHAR_BIT * sizeof(t) / 3 + 1)
71 * MAKENINES(n) turns n into (10**n)-1. This is useful for converting a width
72 * into a number that wide in decimal.
73 * XXX: Overflows are not considered.
75 #define MAKENINES(n) \
79 /* Use a loop as all values of n are small. */ \
80 for (i = 1; n > 0; i *= 10) \
85 static void display(const FTSENT *, FTSENT *);
86 static int mastercmp(const FTSENT **, const FTSENT **);
87 static void traverse(int, char **, int);
89 static void (*printfcn)(const DISPLAY *);
90 static int (*sortfcn)(const FTSENT *, const FTSENT *);
92 long blocksize; /* block size units */
93 int termwidth = 80; /* default terminal width */
96 int f_accesstime; /* use time of last access */
97 int f_flags; /* show flags associated with a file */
98 int f_fsmid; /* show FSMID associated with a file */
99 int f_humanval; /* show human-readable file sizes */
100 int f_inode; /* print inode */
101 static int f_kblocks; /* print size in kilobytes */
102 static int f_listdir; /* list actual directory, not contents */
103 static int f_listdot; /* list files beginning with . */
104 int f_longform; /* long listing format */
105 int f_nonprint; /* show unprintables as ? */
106 static int f_nosort; /* don't sort output */
107 int f_notabs; /* don't use tab-separated multi-col output */
108 static int f_numericonly; /* don't convert uid/gid to name */
109 int f_octal; /* show unprintables as \xxx */
110 int f_octal_escape; /* like f_octal but use C escapes if possible */
111 static int f_recursive; /* ls subdirectories also */
112 static int f_reversesort; /* reverse whatever sort is used */
113 int f_sectime; /* print the real time for all files */
114 static int f_singlecol; /* use single column output */
115 int f_size; /* list size in short listing */
116 int f_slash; /* similar to f_type, but only for dirs */
117 int f_sortacross; /* sort across rows, not down columns */
118 int f_statustime; /* use time of last mode change */
119 static int f_stream; /* stream the output, separate with commas */
120 static int f_timesort; /* sort by time vice name */
121 int f_type; /* add type character for non-regular files */
122 static int f_whiteout; /* show whiteout entries */
124 int f_color; /* add type in color for non-regular files */
126 char *ansi_bgcol; /* ANSI sequence to set background colour */
127 char *ansi_fgcol; /* ANSI sequence to set foreground colour */
128 char *ansi_coloff; /* ANSI sequence to reset colours */
129 char *attrs_off; /* ANSI sequence to turn off attributes */
130 char *enter_bold; /* ANSI sequence to set color to bold mode */
136 main(int argc, char *argv[])
138 static char dot[] = ".", *dotav[] = {dot, NULL};
140 int ch, fts_options, notused;
143 char termcapbuf[1024]; /* termcap definition buffer */
144 char tcapbuf[512]; /* capability buffer */
148 setlocale(LC_ALL, "");
150 /* Terminal defaults to -Cq, non-terminal defaults to -1. */
151 if (isatty(STDOUT_FILENO)) {
153 if ((p = getenv("COLUMNS")) != NULL && *p != '\0')
155 else if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) != -1 &&
157 termwidth = win.ws_col;
161 /* retrieve environment variable, in case of explicit -C */
162 p = getenv("COLUMNS");
167 /* Root is -A automatically. */
171 fts_options = FTS_PHYSICAL;
172 while ((ch = getopt(argc, argv, "1ABCFGHLPRTWabcdfghiklmnopqrstuwxy"))
176 * The -1, -C, -x and -l options all override each other so
177 * shell aliasing works right.
190 f_sortacross = f_longform = f_singlecol = 0;
203 #ifdef _ST_FSMID_PRESENT_
207 /* The -c and -u options override each other. */
221 fts_options |= FTS_COMFOLLOW;
224 if (setenv("CLICOLOR", "", 1) != 0)
225 warn("setenv: cannot set CLICOLOR");
228 fts_options &= ~FTS_PHYSICAL;
229 fts_options |= FTS_LOGICAL;
232 fts_options &= ~FTS_COMFOLLOW;
233 fts_options &= ~FTS_LOGICAL;
234 fts_options |= FTS_PHYSICAL;
240 fts_options |= FTS_SEEDOT;
245 /* The -d option turns off the -R option. */
253 case 'g': /* Compatibility with 4.3BSD. */
318 /* Enabling of colours is conditional on the environment. */
319 if (getenv("CLICOLOR") &&
320 (isatty(STDOUT_FILENO) || getenv("CLICOLOR_FORCE")))
322 if (tgetent(termcapbuf, getenv("TERM")) == 1) {
323 ansi_fgcol = tgetstr("AF", &bp);
324 ansi_bgcol = tgetstr("AB", &bp);
325 attrs_off = tgetstr("me", &bp);
326 enter_bold = tgetstr("md", &bp);
328 /* To switch colours off use 'op' if
329 * available, otherwise use 'oc', or
330 * don't do colours at all. */
331 ansi_coloff = tgetstr("op", &bp);
333 ansi_coloff = tgetstr("oc", &bp);
334 if (ansi_fgcol && ansi_bgcol && ansi_coloff)
338 fprintf(stderr, "Color support not compiled in.\n");
344 * We can't put tabs and color sequences together:
345 * column number will be incremented incorrectly
346 * for "stty oxtabs" mode.
349 signal(SIGINT, colorquit);
350 signal(SIGQUIT, colorquit);
351 parsecolors(getenv("LSCOLORS"));
356 * If not -F, -i, -l, -s or -t options, don't require stat
357 * information, unless in color mode in which case we do
358 * need this to determine which colors to display.
360 if (!f_inode && !f_longform && !f_size && !f_timesort && !f_type
365 fts_options |= FTS_NOSTAT;
368 * If not -F, -d or -l options, follow any symbolic links listed on
371 if (!f_longform && !f_listdir && !f_type)
372 fts_options |= FTS_COMFOLLOW;
375 * If -W, show whiteout entries
379 fts_options |= FTS_WHITEOUT;
382 /* If -l or -s, figure out block size. */
383 if (f_longform || f_size) {
387 getbsize(¬used, &blocksize);
391 /* Select a sort function. */
394 sortfcn = revnamecmp;
395 else if (f_accesstime)
397 else if (f_statustime)
398 sortfcn = revstatcmp;
399 else /* Use modification time. */
404 else if (f_accesstime)
406 else if (f_statustime)
408 else /* Use modification time. */
412 /* Select a print function. */
414 printfcn = printscol;
416 printfcn = printlong;
418 printfcn = printstream;
423 traverse(argc, argv, fts_options);
425 traverse(1, dotav, fts_options);
429 static int output; /* If anything output. */
432 * Traverse() walks the logical directory structure specified by the argv list
433 * in the order specified by the mastercmp() comparison function. During the
434 * traversal it passes linked lists of structures to display() which represent
435 * a superset (may be exact set) of the files to be displayed.
438 traverse(int argc, char *argv[], int options)
445 fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL)
449 * We ignore errors from fts_children here since they will be
450 * replicated and signalled on the next call to fts_read() below.
452 chp = fts_children(ftsp, 0);
459 * If not recursing down this tree and don't need stat info, just get
462 ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0;
464 while ((p = fts_read(ftsp)) != NULL)
465 switch (p->fts_info) {
467 warnx("%s: directory causes a cycle", p->fts_name);
471 warnx("%s: %s", p->fts_name, strerror(p->fts_errno));
475 if (p->fts_level != FTS_ROOTLEVEL &&
476 p->fts_name[0] == '.' && !f_listdot)
480 * If already output something, put out a newline as
481 * a separator. If multiple arguments, precede each
482 * directory with its name.
486 printname(p->fts_path);
488 } else if (argc > 1) {
489 printname(p->fts_path);
493 chp = fts_children(ftsp, ch_options);
496 if (!f_recursive && chp != NULL)
497 fts_set(ftsp, p, FTS_SKIP);
507 * Display() takes a linked list of FTSENT structures and passes the list
508 * along with any other necessary information to the print function. P
509 * points to the parent directory of the display list.
512 display(const FTSENT *p, FTSENT *list)
519 u_long btotal, maxlen;
523 int bcfile, maxflags;
526 size_t fsmidlen, flen, ulen, glen;
528 int entries, needstats;
529 const char *user, *group;
532 char buf[STRBUF_SIZEOF(u_quad_t) + 1];
533 char ngroup[STRBUF_SIZEOF(uid_t) + 1];
534 char nuser[STRBUF_SIZEOF(gid_t) + 1];
536 needstats = f_inode || f_longform || f_size;
539 initmax = getenv("LS_COLWIDTHS");
540 /* Fields match -lios order. New ones should be added at the end. */
541 maxblock = maxinode = maxlen = maxnlink =
542 maxuser = maxgroup = maxflags = maxsize = 0;
543 if (initmax != NULL && *initmax != '\0') {
544 char *initmax2, *jinitmax;
547 /* Fill-in "::" as "0:0:0" for the sake of scanf. */
548 jinitmax = malloc(strlen(initmax) * 2 + 2);
549 if (jinitmax == NULL)
553 strcpy(initmax2, "0:"), initmax2 += 2;
555 *initmax2++ = *initmax, *initmax2 = '\0';
556 for (initmax++; *initmax != '\0'; initmax++) {
557 if (initmax[-1] == ':' && initmax[0] == ':') {
559 *initmax2++ = initmax[0];
562 *initmax2++ = initmax[0];
566 if (initmax2[-1] == ':')
567 strcpy(initmax2, "0");
569 ninitmax = sscanf(jinitmax,
570 " %llu : %lli : %u : %i : %i : %i : %llu : %lu ",
571 &maxinode, &maxblock, &maxnlink, &maxuser,
572 &maxgroup, &maxflags, &maxsize, &maxlen);
615 for (cur = list, entries = 0; cur; cur = cur->fts_link) {
616 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) {
618 cur->fts_name, strerror(cur->fts_errno));
619 cur->fts_number = NO_PRINT;
624 * P is NULL if list is the argv list, to which different rules
628 /* Directories will be displayed later. */
629 if (cur->fts_info == FTS_D && !f_listdir) {
630 cur->fts_number = NO_PRINT;
634 /* Only display dot file if -a/-A set. */
635 if (cur->fts_name[0] == '.' && !f_listdot) {
636 cur->fts_number = NO_PRINT;
640 if (cur->fts_namelen > maxlen)
641 maxlen = cur->fts_namelen;
642 if (f_octal || f_octal_escape) {
643 u_long t = len_octal(cur->fts_name, cur->fts_namelen);
650 if (sp->st_blocks > maxblock)
651 maxblock = sp->st_blocks;
652 if (sp->st_ino > maxinode)
653 maxinode = sp->st_ino;
654 if (sp->st_nlink > maxnlink)
655 maxnlink = sp->st_nlink;
656 if (sp->st_size > maxsize)
657 maxsize = sp->st_size;
659 btotal += sp->st_blocks;
662 snprintf(nuser, sizeof(nuser),
664 snprintf(ngroup, sizeof(ngroup),
669 user = user_from_uid(sp->st_uid, 0);
670 group = group_from_gid(sp->st_gid, 0);
672 if ((ulen = strlen(user)) > maxuser)
674 if ((glen = strlen(group)) > maxgroup)
677 flags = fflagstostr(sp->st_flags);
678 if (flags != NULL && *flags == '\0') {
683 err(1, "flagstostr");
684 flen = strlen(flags);
685 if (flen > (size_t)maxflags)
690 #ifdef _ST_FSMID_PRESENT_
692 fsmid = sp->st_fsmid;
702 if ((np = malloc(sizeof(NAMES) +
703 ulen + glen + flen + fsmidlen + 4)) == NULL)
706 np->user = &np->data[0];
707 strcpy(np->user, user);
708 np->group = &np->data[ulen + 1];
709 strcpy(np->group, group);
711 if (S_ISCHR(sp->st_mode) ||
712 S_ISBLK(sp->st_mode))
716 np->flags = &np->data[ulen + glen + 2];
717 strcpy(np->flags, flags);
720 #ifdef _ST_FSMID_PRESENT_
722 np->fsmid = np->data + ulen + glen + flen + 3;
723 snprintf(np->fsmid, fsmidlen + 1,
727 cur->fts_pointer = np;
734 * If there are no entries to display, we normally stop right
735 * here. However, we must continue if we have to display the
736 * total block count. In this case, we display the total only
737 * on the second (p != NULL) pass.
739 if (!entries && (!(f_longform || f_size) || p == NULL))
748 snprintf(buf, sizeof(buf), "%lli", maxblock);
749 d.s_block = strlen(buf);
750 d.s_flags = maxflags;
751 d.s_group = maxgroup;
752 snprintf(buf, sizeof(buf), "%llu", maxinode);
753 d.s_inode = strlen(buf);
754 snprintf(buf, sizeof(buf), "%u", maxnlink);
755 d.s_nlink = strlen(buf);
756 snprintf(buf, sizeof(buf), "%llu", maxsize);
757 d.s_size = strlen(buf);
764 for (cur = list; cur; cur = cur->fts_link)
765 free(cur->fts_pointer);
769 * Ordering for mastercmp:
770 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories
771 * as larger than directories. Within either group, use the sort function.
772 * All other levels use the sort function. Error entries remain unsorted.
775 mastercmp(const FTSENT **a, const FTSENT **b)
779 a_info = (*a)->fts_info;
780 if (a_info == FTS_ERR)
782 b_info = (*b)->fts_info;
783 if (b_info == FTS_ERR)
786 if (a_info == FTS_NS || b_info == FTS_NS)
787 return (namecmp(*a, *b));
789 if (a_info != b_info &&
790 (*a)->fts_level == FTS_ROOTLEVEL && !f_listdir) {
796 return (sortfcn(*a, *b));