GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: bin/ls/ls.c Lines: 154 275 56.0 %
Date: 2017-11-13 Branches: 100 188 53.2 %

Line Branch Exec Source
1
/*	$OpenBSD: ls.c,v 1.48 2016/08/16 16:13:32 krw Exp $	*/
2
/*	$NetBSD: ls.c,v 1.18 1996/07/09 09:16:29 mycroft Exp $	*/
3
4
/*
5
 * Copyright (c) 1989, 1993, 1994
6
 *	The Regents of the University of California.  All rights reserved.
7
 *
8
 * This code is derived from software contributed to Berkeley by
9
 * Michael Fischbein.
10
 *
11
 * Redistribution and use in source and binary forms, with or without
12
 * modification, are permitted provided that the following conditions
13
 * are met:
14
 * 1. Redistributions of source code must retain the above copyright
15
 *    notice, this list of conditions and the following disclaimer.
16
 * 2. Redistributions in binary form must reproduce the above copyright
17
 *    notice, this list of conditions and the following disclaimer in the
18
 *    documentation and/or other materials provided with the distribution.
19
 * 3. Neither the name of the University nor the names of its contributors
20
 *    may be used to endorse or promote products derived from this software
21
 *    without specific prior written permission.
22
 *
23
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33
 * SUCH DAMAGE.
34
 */
35
36
#include <sys/types.h>
37
#include <sys/stat.h>
38
#include <sys/ioctl.h>
39
40
#include <dirent.h>
41
#include <err.h>
42
#include <errno.h>
43
#include <fts.h>
44
#include <grp.h>
45
#include <pwd.h>
46
#include <stdio.h>
47
#include <stdlib.h>
48
#include <string.h>
49
#include <unistd.h>
50
#include <limits.h>
51
#include <locale.h>
52
#include <util.h>
53
54
#include "ls.h"
55
#include "extern.h"
56
57
static void	 display(FTSENT *, FTSENT *);
58
static int	 mastercmp(const FTSENT **, const FTSENT **);
59
static void	 traverse(int, char **, int);
60
61
static void (*printfcn)(DISPLAY *);
62
static int (*sortfcn)(const FTSENT *, const FTSENT *);
63
64
#define	BY_NAME 0
65
#define	BY_SIZE 1
66
#define	BY_TIME	2
67
68
long blocksize;			/* block size units */
69
int termwidth;			/* default terminal width */
70
int sortkey = BY_NAME;
71
72
/* flags */
73
int f_accesstime;		/* use time of last access */
74
int f_column;			/* columnated format */
75
int f_columnacross;		/* columnated format, sorted across */
76
int f_flags;			/* show flags associated with a file */
77
int f_grouponly;		/* long listing format without owner */
78
int f_humanval;			/* show human-readable file sizes */
79
int f_inode;			/* print inode */
80
int f_listdir;			/* list actual directory, not contents */
81
int f_listdot;			/* list files beginning with . */
82
int f_longform;			/* long listing format */
83
int f_nonprint;			/* show unprintables as ? */
84
int f_nosort;			/* don't sort output */
85
int f_numericonly;		/* don't expand uid to symbolic name */
86
int f_recursive;		/* ls subdirectories also */
87
int f_reversesort;		/* reverse whatever sort is used */
88
int f_sectime;			/* print the real time for all files */
89
int f_singlecol;		/* use single column output */
90
int f_size;			/* list size in short listing */
91
int f_statustime;		/* use time of last mode change */
92
int f_stream;			/* stream format */
93
int f_type;			/* add type character for non-regular files */
94
int f_typedir;			/* add type character for directories */
95
96
int rval;
97
98
int
99
ls_main(int argc, char *argv[])
100
{
101
	static char dot[] = ".", *dotav[] = { dot, NULL };
102
9684
	struct winsize win;
103
4842
	int ch, fts_options, notused;
104
	int kflag = 0;
105
	char *p;
106
107
#ifndef SMALL
108
4842
	setlocale(LC_CTYPE, "");
109
#endif
110
111
	/* Terminal defaults to -Cq, non-terminal defaults to -1. */
112
4842
	if (isatty(STDOUT_FILENO)) {
113
8
		f_column = f_nonprint = 1;
114
8
	} else {
115
		f_singlecol = 1;
116
	}
117
118
4842
	termwidth = 0;
119
4842
	if ((p = getenv("COLUMNS")) != NULL)
120
		termwidth = strtonum(p, 1, INT_MAX, NULL);
121

9692
	if (termwidth == 0 && ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == 0 &&
122
8
	    win.ws_col > 0)
123
8
		termwidth = win.ws_col;
124
4842
	if (termwidth == 0)
125
4834
		termwidth = 80;
126
127
4842
	if (pledge("stdio rpath getpw flock cpath wpath", NULL) == -1)
128
		err(1, "pledge");
129
130
	/* Root is -A automatically. */
131
4842
	if (!getuid())
132
4842
		f_listdot = 1;
133
134
	fts_options = FTS_PHYSICAL;
135
9768
	while ((ch = getopt(argc, argv, "1ACFHLRSTacdfghiklmnopqrstux")) != -1) {
136







47
		switch (ch) {
137
		/*
138
		 * The -1, -C and -l, -m, -n and -x options all override each
139
		 * other so shell aliasing works right.
140
		 */
141
		case '1':
142
			f_singlecol = 1;
143
			f_column = f_columnacross = f_longform = 0;
144
			f_numericonly = f_stream = 0;
145
			break;
146
		case 'C':
147
			f_column = 1;
148
			f_columnacross = f_longform = f_numericonly = 0;
149
			f_singlecol = f_stream = 0;
150
			break;
151
		case 'g':
152
			f_longform = 1;
153
			if (f_grouponly != -1)
154
				f_grouponly = 1;
155
			f_column = f_columnacross = f_singlecol = f_stream = 0;
156
			break;
157
		case 'l':
158
37
			f_longform = 1;
159
37
			f_grouponly = -1;	/* -l always overrides -g */
160
37
			f_column = f_columnacross = f_singlecol = f_stream = 0;
161
37
			break;
162
		case 'm':
163
			f_stream = 1;
164
			f_column = f_columnacross = f_longform = 0;
165
			f_numericonly = f_singlecol = 0;
166
			break;
167
		case 'x':
168
			f_columnacross = 1;
169
			f_column = f_longform = f_numericonly = 0;
170
			f_singlecol = f_stream = 0;
171
			break;
172
		case 'n':
173
			f_longform = 1;
174
			f_numericonly = 1;
175
			f_column = f_columnacross = f_singlecol = f_stream = 0;
176
			break;
177
		/* The -c and -u options override each other. */
178
		case 'c':
179
			f_statustime = 1;
180
			f_accesstime = 0;
181
			break;
182
		case 'u':
183
			f_accesstime = 1;
184
			f_statustime = 0;
185
			break;
186
		case 'F':
187
			f_type = 1;
188
			break;
189
		case 'H':
190
			fts_options |= FTS_COMFOLLOW;
191
			break;
192
		case 'L':
193
			fts_options &= ~FTS_PHYSICAL;
194
			fts_options |= FTS_LOGICAL;
195
			break;
196
		case 'R':
197
			f_recursive = 1;
198
			break;
199
		case 'f':
200
			f_nosort = 1;
201
			/* FALLTHROUGH */
202
		case 'a':
203
5
			fts_options |= FTS_SEEDOT;
204
			/* FALLTHROUGH */
205
		case 'A':
206
5
			f_listdot = 1;
207
5
			break;
208
		/* The -d option turns off the -R option. */
209
		case 'd':
210
			f_listdir = 1;
211
			f_recursive = 0;
212
			break;
213
		case 'h':
214
			f_humanval = 1;
215
			break;
216
		case 'i':
217
			f_inode = 1;
218
			break;
219
		case 'k':
220
			blocksize = 1024;
221
			kflag = 1;
222
			break;
223
		case 'o':
224
			f_flags = 1;
225
			break;
226
		case 'p':
227
			f_typedir = 1;
228
			break;
229
		case 'q':
230
			f_nonprint = 1;
231
			break;
232
		case 'r':
233
			f_reversesort = 1;
234
			break;
235
		case 'S':
236
			sortkey = BY_SIZE;
237
			break;
238
		case 's':
239
			f_size = 1;
240
			break;
241
		case 'T':
242
			f_sectime = 1;
243
			break;
244
		case 't':
245
			sortkey = BY_TIME;
246
			break;
247
		default:
248
			usage();
249
		}
250
	}
251
4842
	argc -= optind;
252
4842
	argv += optind;
253
254
	/*
255
	 * If both -g and -l options, let -l take precedence.
256
	 * This preserves compatibility with the historic BSD ls -lg.
257
	 */
258
4842
	if (f_grouponly == -1)
259
37
		f_grouponly = 0;
260
261
	/*
262
	 * If not -F, -i, -l, -p, -S, -s or -t options, don't require stat
263
	 * information.
264
	 */
265
9684
	if (!f_longform && !f_inode && !f_size && !f_type && !f_typedir &&
266
4842
	    sortkey == BY_NAME)
267
4805
		fts_options |= FTS_NOSTAT;
268
269
	/*
270
	 * If not -F, -d or -l options, follow any symbolic links listed on
271
	 * the command line.
272
	 */
273
4842
	if (!f_longform && !f_listdir && !f_type)
274
4805
		fts_options |= FTS_COMFOLLOW;
275
276
	/* If -l or -s, figure out block size. */
277
4842
	if (f_longform || f_size) {
278
37
		if (!kflag)
279
37
			(void)getbsize(&notused, &blocksize);
280
37
		blocksize /= 512;
281
37
	}
282
283
	/* Select a sort function. */
284
4842
	if (f_reversesort) {
285
		switch (sortkey) {
286
		case BY_NAME:
287
			sortfcn = revnamecmp;
288
			break;
289
		case BY_SIZE:
290
			sortfcn = revsizecmp;
291
			break;
292
		case BY_TIME:
293
			if (f_accesstime)
294
				sortfcn = revacccmp;
295
			else if (f_statustime)
296
				sortfcn = revstatcmp;
297
			else /* Use modification time. */
298
				sortfcn = revmodcmp;
299
			break;
300
		}
301
	} else {
302

9684
		switch (sortkey) {
303
		case BY_NAME:
304
			sortfcn = namecmp;
305
			break;
306
		case BY_SIZE:
307
			sortfcn = sizecmp;
308
			break;
309
		case BY_TIME:
310
			if (f_accesstime)
311
				sortfcn = acccmp;
312
			else if (f_statustime)
313
				sortfcn = statcmp;
314
			else /* Use modification time. */
315
				sortfcn = modcmp;
316
			break;
317
		}
318
	}
319
320
	/* Select a print function. */
321
4842
	if (f_singlecol)
322
		printfcn = printscol;
323
40
	else if (f_columnacross)
324
		printfcn = printacol;
325
40
	else if (f_longform)
326
		printfcn = printlong;
327
3
	else if (f_stream)
328
		printfcn = printstream;
329
	else
330
		printfcn = printcol;
331
332
4842
	if (argc)
333
4835
		traverse(argc, argv, fts_options);
334
	else
335
7
		traverse(1, dotav, fts_options);
336
9684
	return (rval);
337
4842
}
338
339
static int output;			/* If anything output. */
340
341
/*
342
 * Traverse() walks the logical directory structure specified by the argv list
343
 * in the order specified by the mastercmp() comparison function.  During the
344
 * traversal it passes linked lists of structures to display() which represent
345
 * a superset (may be exact set) of the files to be displayed.
346
 */
347
static void
348
traverse(int argc, char *argv[], int options)
349
{
350
	FTS *ftsp;
351
	FTSENT *p, *chp;
352
	int ch_options, saved_errno;
353
354
4842
	if ((ftsp =
355
9684
	    fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL)
356
		err(1, NULL);
357
358
4842
	display(NULL, fts_children(ftsp, 0));
359
4842
	if (f_listdir)
360
		return;
361
362
	/*
363
	 * If not recursing down this tree and don't need stat info, just get
364
	 * the names.
365
	 */
366
14526
	ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0;
367
368
5679814
	while ((p = fts_read(ftsp)) != NULL)
369

2835074
		switch (p->fts_info) {
370
		case FTS_D:
371
9
			if (p->fts_name[0] == '.' &&
372
7
			    p->fts_level != FTS_ROOTLEVEL && !f_listdot)
373
				break;
374
375
			/*
376
			 * If already output something, put out a newline as
377
			 * a separator.  If multiple arguments, precede each
378
			 * directory with its name.
379
			 */
380
9
			if (output)
381
				(void)printf("\n%s:\n", p->fts_path);
382
9
			else if (argc > 1) {
383
				(void)printf("%s:\n", p->fts_path);
384
				output = 1;
385
			}
386
387
9
			chp = fts_children(ftsp, ch_options);
388
9
			saved_errno = errno;
389
9
			display(p, chp);
390
391
			/*
392
			 * On fts_children() returning error do recurse to see
393
			 * the error.
394
			 */
395

18
			if (!f_recursive && !(chp == NULL && saved_errno != 0))
396
9
				(void)fts_set(ftsp, p, FTS_SKIP);
397
			break;
398
		case FTS_DC:
399
			warnx("%s: directory causes a cycle", p->fts_name);
400
			break;
401
		case FTS_DNR:
402
		case FTS_ERR:
403
			warnx("%s: %s", p->fts_name[0] == '\0' ? p->fts_path :
404
			    p->fts_name, strerror(p->fts_errno));
405
			rval = 1;
406
			break;
407
		}
408
4842
	if (errno)
409
		err(1, "fts_read");
410
411
4842
	fts_close(ftsp);
412
9684
}
413
414
/*
415
 * Display() takes a linked list of FTSENT structures and passes the list
416
 * along with any other necessary information to the print function.  P
417
 * points to the parent directory of the display list.
418
 */
419
static void
420
display(FTSENT *p, FTSENT *list)
421
{
422
	struct stat *sp;
423
9702
	DISPLAY d;
424
	FTSENT *cur;
425
	NAMES *np;
426
	off_t maxsize;
427
	nlink_t maxnlink;
428
	unsigned long long btotal;
429
	blkcnt_t maxblock;
430
	ino_t maxinode;
431
	int bcfile, flen, glen, ulen, maxflags, maxgroup, maxuser, maxlen;
432
	int entries, needstats;
433
	int width;
434
4851
	char *user, *group, buf[21];	/* 64 bits == 20 digits */
435
4851
	char nuser[12], ngroup[12];
436
	char *flags = NULL;
437
438
	/*
439
	 * If list is NULL there are two possibilities: that the parent
440
	 * directory p has no children, or that fts_children() returned an
441
	 * error.  We ignore the error case since it will be replicated
442
	 * on the next call to fts_read() on the post-order visit to the
443
	 * directory p, and will be signalled in traverse().
444
	 */
445
4851
	if (list == NULL)
446
		return;
447
448
14511
	needstats = f_inode || f_longform || f_size;
449
	flen = 0;
450
	btotal = maxblock = maxinode = maxlen = maxnlink = 0;
451
	bcfile = 0;
452
	maxuser = maxgroup = maxflags = 0;
453
	maxsize = 0;
454
5680152
	for (cur = list, entries = 0; cur != NULL; cur = cur->fts_link) {
455

5670450
		if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) {
456
			warnx("%s: %s",
457
			    cur->fts_name, strerror(cur->fts_errno));
458
			cur->fts_number = NO_PRINT;
459
			rval = 1;
460
			continue;
461
		}
462
463
		/*
464
		 * P is NULL if list is the argv list, to which different rules
465
		 * apply.
466
		 */
467
2835225
		if (p == NULL) {
468
			/* Directories will be displayed later. */
469
2835056
			if (cur->fts_info == FTS_D && !f_listdir) {
470
9
				cur->fts_number = NO_PRINT;
471
9
				continue;
472
			}
473
		} else {
474
			/* Only display dot file if -a/-A set. */
475
169
			if (cur->fts_name[0] == '.' && !f_listdot) {
476
				cur->fts_number = NO_PRINT;
477
				continue;
478
			}
479
		}
480
2835216
		if ((width = mbsprint(cur->fts_name, 0)) > maxlen)
481
9275
			maxlen = width;
482
2835216
		if (needstats) {
483
162
			sp = cur->fts_statp;
484
162
			if (sp->st_blocks > maxblock)
485
36
				maxblock = sp->st_blocks;
486
162
			if (sp->st_ino > maxinode)
487
100
				maxinode = sp->st_ino;
488
162
			if (sp->st_nlink > maxnlink)
489
48
				maxnlink = sp->st_nlink;
490
162
			if (sp->st_size > maxsize)
491
37
				maxsize = sp->st_size;
492
493
162
			btotal += sp->st_blocks;
494
162
			if (f_longform) {
495
162
				if (f_numericonly) {
496
					snprintf(nuser, 12, "%u", sp->st_uid);
497
					snprintf(ngroup, 12, "%u", sp->st_gid);
498
					user = nuser;
499
					group = ngroup;
500
				} else {
501
162
					user = user_from_uid(sp->st_uid, 0);
502
162
					group = group_from_gid(sp->st_gid, 0);
503
				}
504
162
				if ((ulen = strlen(user)) > maxuser)
505
37
					maxuser = ulen;
506
162
				if ((glen = strlen(group)) > maxgroup)
507
39
					maxgroup = glen;
508
162
				if (f_flags) {
509
					flags = fflagstostr(sp->st_flags);
510
					if (*flags == '\0')
511
						flags = "-";
512
					if ((flen = strlen(flags)) > maxflags)
513
						maxflags = flen;
514
				} else
515
					flen = 0;
516
517
486
				if ((np = malloc(sizeof(NAMES) +
518
486
				    ulen + 1 + glen + 1 + flen + 1)) == NULL)
519
					err(1, NULL);
520
521
162
				np->user = &np->data[0];
522
162
				(void)strlcpy(np->user, user, ulen + 1);
523
162
				np->group = &np->data[ulen + 1];
524
162
				(void)strlcpy(np->group, group, glen + 1);
525
526

324
				if (S_ISCHR(sp->st_mode) ||
527
162
				    S_ISBLK(sp->st_mode))
528
					bcfile = 1;
529
530
162
				if (f_flags) {
531
					np->flags = &np->data[ulen + 1 + glen + 1];
532
					(void)strlcpy(np->flags, flags, flen + 1);
533
					if (*flags != '-')
534
						free(flags);
535
				}
536
162
				cur->fts_pointer = np;
537
162
			}
538
		}
539
2835216
		++entries;
540
2835216
	}
541
542
4851
	if (!entries)
543
9
		return;
544
545
4842
	d.list = list;
546
4842
	d.entries = entries;
547
4842
	d.maxlen = maxlen;
548
4842
	if (needstats) {
549
37
		d.bcfile = bcfile;
550
37
		d.btotal = btotal;
551
37
		(void)snprintf(buf, sizeof(buf), "%llu",
552
		   (unsigned long long)maxblock);
553
37
		d.s_block = strlen(buf);
554
37
		d.s_flags = maxflags;
555
37
		d.s_group = maxgroup;
556
37
		(void)snprintf(buf, sizeof(buf), "%llu",
557
		    (unsigned long long)maxinode);
558
37
		d.s_inode = strlen(buf);
559
37
		(void)snprintf(buf, sizeof(buf), "%lu",
560
37
		    (unsigned long)maxnlink);
561
37
		d.s_nlink = strlen(buf);
562
37
		if (!f_humanval) {
563
37
			(void)snprintf(buf, sizeof(buf), "%lld",
564
				(long long) maxsize);
565
37
			d.s_size = strlen(buf);
566
37
		} else
567
			d.s_size = FMT_SCALED_STRSIZE-2; /* no - or '\0' */
568
37
		d.s_user = maxuser;
569
37
	}
570
571
4842
	printfcn(&d);
572
4842
	output = 1;
573
574
4842
	if (f_longform)
575
398
		for (cur = list; cur != NULL; cur = cur->fts_link)
576
162
			free(cur->fts_pointer);
577
9693
}
578
579
/*
580
 * Ordering for mastercmp:
581
 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories
582
 * as larger than directories.  Within either group, use the sort function.
583
 * All other levels use the sort function.  Error entries remain unsorted.
584
 */
585
static int
586
mastercmp(const FTSENT **a, const FTSENT **b)
587
{
588
	int a_info, b_info;
589
590
67161664
	a_info = (*a)->fts_info;
591
33580832
	if (a_info == FTS_ERR)
592
		return (0);
593
33580832
	b_info = (*b)->fts_info;
594
33580832
	if (b_info == FTS_ERR)
595
		return (0);
596
597
33580832
	if (a_info == FTS_NS || b_info == FTS_NS) {
598
		if (b_info != FTS_NS)
599
			return (1);
600
		else if (a_info != FTS_NS)
601
			return (-1);
602
		else
603
			return (namecmp(*a, *b));
604
	}
605
606
33580832
	if (a_info != b_info &&
607
111
	    (*a)->fts_level == FTS_ROOTLEVEL && !f_listdir) {
608
		if (a_info == FTS_D)
609
			return (1);
610
		if (b_info == FTS_D)
611
			return (-1);
612
	}
613
33580832
	return (sortfcn(*a, *b));
614
33580832
}