1 /*
2 * Copyright (c) 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Michael Fischbein.
7 *
8 * %sccs.include.redist.c%
9 */
10
11 #ifndef lint
12 static char copyright[] =
13 "@(#) Copyright (c) 1989, 1993, 1994\n\
14 The Regents of the University of California. All rights reserved.\n";
15 #endif /* not lint */
16
17 #ifndef lint
18 static char sccsid[] = "@(#)ls.c 8.7 (Berkeley) 08/05/94";
19 #endif /* not lint */
20
21 #include <sys/types.h>
22 #include <sys/stat.h>
23 #include <sys/ioctl.h>
24
25 #include <dirent.h>
26 #include <err.h>
27 #include <errno.h>
28 #include <fts.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <unistd.h>
33
34 #include "ls.h"
35 #include "extern.h"
36
37 static void display __P((FTSENT *, FTSENT *));
38 static int mastercmp __P((const FTSENT **, const FTSENT **));
39 static void traverse __P((int, char **, int));
40
41 static void (*printfcn) __P((DISPLAY *));
42 static int (*sortfcn) __P((const FTSENT *, const FTSENT *));
43
44 long blocksize; /* block size units */
45 int termwidth = 80; /* default terminal width */
46
47 /* flags */
48 int f_accesstime; /* use time of last access */
49 int f_column; /* columnated format */
50 int f_flags; /* show flags associated with a file */
51 int f_inode; /* print inode */
52 int f_listdir; /* list actual directory, not contents */
53 int f_listdot; /* list files beginning with . */
54 int f_longform; /* long listing format */
55 int f_newline; /* if precede with newline */
56 int f_nonprint; /* show unprintables as ? */
57 int f_nosort; /* don't sort output */
58 int f_recursive; /* ls subdirectories also */
59 int f_reversesort; /* reverse whatever sort is used */
60 int f_sectime; /* print the real time for all files */
61 int f_singlecol; /* use single column output */
62 int f_size; /* list size in short listing */
63 int f_statustime; /* use time of last mode change */
64 int f_dirname; /* if precede with directory name */
65 int f_timesort; /* sort by time vice name */
66 int f_type; /* add type character for non-regular files */
67 int f_whiteout; /* show whiteout entries */
68
69 int
main(argc,argv)70 main(argc, argv)
71 int argc;
72 char *argv[];
73 {
74 static char dot[] = ".", *dotav[] = { dot, NULL };
75 struct winsize win;
76 int ch, fts_options, notused;
77 char *p;
78
79 /* Terminal defaults to -Cq, non-terminal defaults to -1. */
80 if (isatty(STDOUT_FILENO)) {
81 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1 ||
82 !win.ws_col) {
83 if ((p = getenv("COLUMNS")) != NULL)
84 termwidth = atoi(p);
85 }
86 else
87 termwidth = win.ws_col;
88 f_column = f_nonprint = 1;
89 } else
90 f_singlecol = 1;
91
92 /* Root is -A automatically. */
93 if (!getuid())
94 f_listdot = 1;
95
96 fts_options = FTS_PHYSICAL;
97 while ((ch = getopt(argc, argv, "1ACFLRTWacdfgiloqrstu")) != EOF) {
98 switch (ch) {
99 /*
100 * The -1, -C and -l options all override each other so shell
101 * aliasing works right.
102 */
103 case '1':
104 f_singlecol = 1;
105 f_column = f_longform = 0;
106 break;
107 case 'C':
108 f_column = 1;
109 f_longform = f_singlecol = 0;
110 break;
111 case 'l':
112 f_longform = 1;
113 f_column = f_singlecol = 0;
114 break;
115 /* The -c and -u options override each other. */
116 case 'c':
117 f_statustime = 1;
118 f_accesstime = 0;
119 break;
120 case 'u':
121 f_accesstime = 1;
122 f_statustime = 0;
123 break;
124 case 'F':
125 f_type = 1;
126 break;
127 case 'L':
128 fts_options &= ~FTS_PHYSICAL;
129 fts_options |= FTS_LOGICAL;
130 break;
131 case 'R':
132 f_recursive = 1;
133 break;
134 case 'a':
135 fts_options |= FTS_SEEDOT;
136 /* FALLTHROUGH */
137 case 'A':
138 f_listdot = 1;
139 break;
140 /* The -d option turns off the -R option. */
141 case 'd':
142 f_listdir = 1;
143 f_recursive = 0;
144 break;
145 case 'f':
146 f_nosort = 1;
147 break;
148 case 'g': /* Compatibility with 4.3BSD. */
149 break;
150 case 'i':
151 f_inode = 1;
152 break;
153 case 'o':
154 f_flags = 1;
155 break;
156 case 'q':
157 f_nonprint = 1;
158 break;
159 case 'r':
160 f_reversesort = 1;
161 break;
162 case 's':
163 f_size = 1;
164 break;
165 case 'T':
166 f_sectime = 1;
167 break;
168 case 't':
169 f_timesort = 1;
170 break;
171 case 'W':
172 f_whiteout = 1;
173 break;
174 default:
175 case '?':
176 usage();
177 }
178 }
179 argc -= optind;
180 argv += optind;
181
182 /*
183 * If not -F, -i, -l, -s or -t options, don't require stat
184 * information.
185 */
186 if (!f_inode && !f_longform && !f_size && !f_timesort && !f_type)
187 fts_options |= FTS_NOSTAT;
188
189 /*
190 * If not -F, -d or -l options, follow any symbolic links listed on
191 * the command line.
192 */
193 if (!f_longform && !f_listdir && !f_type)
194 fts_options |= FTS_COMFOLLOW;
195
196 /*
197 * If -W, show whiteout entries
198 */
199 #ifdef FTS_WHITEOUT
200 if (f_whiteout)
201 fts_options |= FTS_WHITEOUT;
202 #endif
203
204 /* If -l or -s, figure out block size. */
205 if (f_longform || f_size) {
206 (void)getbsize(¬used, &blocksize);
207 blocksize /= 512;
208 }
209
210 /* Select a sort function. */
211 if (f_reversesort) {
212 if (!f_timesort)
213 sortfcn = revnamecmp;
214 else if (f_accesstime)
215 sortfcn = revacccmp;
216 else if (f_statustime)
217 sortfcn = revstatcmp;
218 else /* Use modification time. */
219 sortfcn = revmodcmp;
220 } else {
221 if (!f_timesort)
222 sortfcn = namecmp;
223 else if (f_accesstime)
224 sortfcn = acccmp;
225 else if (f_statustime)
226 sortfcn = statcmp;
227 else /* Use modification time. */
228 sortfcn = modcmp;
229 }
230
231 /* Select a print function. */
232 if (f_singlecol)
233 printfcn = printscol;
234 else if (f_longform)
235 printfcn = printlong;
236 else
237 printfcn = printcol;
238
239 if (argc)
240 traverse(argc, argv, fts_options);
241 else
242 traverse(1, dotav, fts_options);
243 exit(0);
244 }
245
246 static int output; /* If anything output. */
247
248 /*
249 * Traverse() walks the logical directory structure specified by the argv list
250 * in the order specified by the mastercmp() comparison function. During the
251 * traversal it passes linked lists of structures to display() which represent
252 * a superset (may be exact set) of the files to be displayed.
253 */
254 static void
traverse(argc,argv,options)255 traverse(argc, argv, options)
256 int argc, options;
257 char *argv[];
258 {
259 FTS *ftsp;
260 FTSENT *p, *chp;
261 int ch_options;
262
263 if ((ftsp =
264 fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL)
265 err(1, NULL);
266
267 display(NULL, fts_children(ftsp, 0));
268 if (f_listdir)
269 return;
270
271 /*
272 * If not recursing down this tree and don't need stat info, just get
273 * the names.
274 */
275 ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0;
276
277 while ((p = fts_read(ftsp)) != NULL)
278 switch (p->fts_info) {
279 case FTS_DC:
280 warnx("%s: directory causes a cycle", p->fts_name);
281 break;
282 case FTS_DNR:
283 case FTS_ERR:
284 warnx("%s: %s", p->fts_name, strerror(p->fts_errno));
285 break;
286 case FTS_D:
287 if (p->fts_level != FTS_ROOTLEVEL &&
288 p->fts_name[0] == '.' && !f_listdot)
289 break;
290
291 /*
292 * If already output something, put out a newline as
293 * a separator. If multiple arguments, precede each
294 * directory with its name.
295 */
296 if (output)
297 (void)printf("\n%s:\n", p->fts_path);
298 else if (argc > 1) {
299 (void)printf("%s:\n", p->fts_path);
300 output = 1;
301 }
302
303 chp = fts_children(ftsp, ch_options);
304 display(p, chp);
305
306 if (!f_recursive && chp != NULL)
307 (void)fts_set(ftsp, p, FTS_SKIP);
308 break;
309 }
310 if (errno)
311 err(1, "fts_read");
312 }
313
314 /*
315 * Display() takes a linked list of FTSENT structures and passes the list
316 * along with any other necessary information to the print function. P
317 * points to the parent directory of the display list.
318 */
319 static void
display(p,list)320 display(p, list)
321 FTSENT *p, *list;
322 {
323 struct stat *sp;
324 DISPLAY d;
325 FTSENT *cur;
326 NAMES *np;
327 u_quad_t maxsize;
328 u_long btotal, maxblock, maxinode, maxlen, maxnlink;
329 int bcfile, flen, glen, ulen, maxflags, maxgroup, maxuser;
330 int entries, needstats;
331 char *user, *group, *flags, buf[20]; /* 32 bits == 10 digits */
332
333 /*
334 * If list is NULL there are two possibilities: that the parent
335 * directory p has no children, or that fts_children() returned an
336 * error. We ignore the error case since it will be replicated
337 * on the next call to fts_read() on the post-order visit to the
338 * directory p, and will be signalled in traverse().
339 */
340 if (list == NULL)
341 return;
342
343 needstats = f_inode || f_longform || f_size;
344 flen = 0;
345 btotal = maxblock = maxinode = maxlen = maxnlink = 0;
346 bcfile = 0;
347 maxuser = maxgroup = maxflags = 0;
348 maxsize = 0;
349 for (cur = list, entries = 0; cur; cur = cur->fts_link) {
350 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) {
351 warnx("%s: %s",
352 cur->fts_name, strerror(cur->fts_errno));
353 cur->fts_number = NO_PRINT;
354 continue;
355 }
356
357 /*
358 * P is NULL if list is the argv list, to which different rules
359 * apply.
360 */
361 if (p == NULL) {
362 /* Directories will be displayed later. */
363 if (cur->fts_info == FTS_D && !f_listdir) {
364 cur->fts_number = NO_PRINT;
365 continue;
366 }
367 } else {
368 /* Only display dot file if -a/-A set. */
369 if (cur->fts_name[0] == '.' && !f_listdot) {
370 cur->fts_number = NO_PRINT;
371 continue;
372 }
373 }
374 if (f_nonprint)
375 prcopy(cur->fts_name, cur->fts_name, cur->fts_namelen);
376 if (cur->fts_namelen > maxlen)
377 maxlen = cur->fts_namelen;
378 if (needstats) {
379 sp = cur->fts_statp;
380 if (sp->st_blocks > maxblock)
381 maxblock = sp->st_blocks;
382 if (sp->st_ino > maxinode)
383 maxinode = sp->st_ino;
384 if (sp->st_nlink > maxnlink)
385 maxnlink = sp->st_nlink;
386 if (sp->st_size > maxsize)
387 maxsize = sp->st_size;
388
389 btotal += sp->st_blocks;
390 if (f_longform) {
391 user = user_from_uid(sp->st_uid, 0);
392 if ((ulen = strlen(user)) > maxuser)
393 maxuser = ulen;
394 group = group_from_gid(sp->st_gid, 0);
395 if ((glen = strlen(group)) > maxgroup)
396 maxgroup = glen;
397 if (f_flags) {
398 flags =
399 flags_to_string(sp->st_flags, "-");
400 if ((flen = strlen(flags)) > maxflags)
401 maxflags = flen;
402 } else
403 flen = 0;
404
405 if ((np = malloc(sizeof(NAMES) +
406 ulen + glen + flen + 3)) == NULL)
407 err(1, NULL);
408
409 np->user = &np->data[0];
410 (void)strcpy(np->user, user);
411 np->group = &np->data[ulen + 1];
412 (void)strcpy(np->group, group);
413
414 if (S_ISCHR(sp->st_mode) ||
415 S_ISBLK(sp->st_mode))
416 bcfile = 1;
417
418 if (f_flags) {
419 np->flags = &np->data[ulen + glen + 2];
420 (void)strcpy(np->flags, flags);
421 }
422 cur->fts_pointer = np;
423 }
424 }
425 ++entries;
426 }
427
428 if (!entries)
429 return;
430
431 d.list = list;
432 d.entries = entries;
433 d.maxlen = maxlen;
434 if (needstats) {
435 d.bcfile = bcfile;
436 d.btotal = btotal;
437 (void)snprintf(buf, sizeof(buf), "%lu", maxblock);
438 d.s_block = strlen(buf);
439 d.s_flags = maxflags;
440 d.s_group = maxgroup;
441 (void)snprintf(buf, sizeof(buf), "%lu", maxinode);
442 d.s_inode = strlen(buf);
443 (void)snprintf(buf, sizeof(buf), "%lu", maxnlink);
444 d.s_nlink = strlen(buf);
445 (void)snprintf(buf, sizeof(buf), "%qu", maxsize);
446 d.s_size = strlen(buf);
447 d.s_user = maxuser;
448 }
449
450 printfcn(&d);
451 output = 1;
452
453 if (f_longform)
454 for (cur = list; cur; cur = cur->fts_link)
455 free(cur->fts_pointer);
456 }
457
458 /*
459 * Ordering for mastercmp:
460 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories
461 * as larger than directories. Within either group, use the sort function.
462 * All other levels use the sort function. Error entries remain unsorted.
463 */
464 static int
mastercmp(a,b)465 mastercmp(a, b)
466 const FTSENT **a, **b;
467 {
468 int a_info, b_info;
469
470 a_info = (*a)->fts_info;
471 if (a_info == FTS_ERR)
472 return (0);
473 b_info = (*b)->fts_info;
474 if (b_info == FTS_ERR)
475 return (0);
476
477 if (a_info == FTS_NS || b_info == FTS_NS)
478 return (namecmp(*a, *b));
479
480 if (a_info == b_info)
481 return (sortfcn(*a, *b));
482
483 if ((*a)->fts_level == FTS_ROOTLEVEL)
484 if (a_info == FTS_D)
485 return (1);
486 else if (b_info == FTS_D)
487 return (-1);
488 else
489 return (sortfcn(*a, *b));
490 else
491 return (sortfcn(*a, *b));
492 }
493