GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: bin/ls/ls.c Lines: 129 284 45.4 %
Date: 2016-12-06 Branches: 92 223 41.3 %

Line Branch Exec Source
1
/*	$OpenBSD: ls.c,v 1.46 2016/03/28 11:25:35 chl 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
100
{
101
	static char dot[] = ".", *dotav[] = { dot, NULL };
102
	struct winsize win;
103
	int ch, fts_options, notused;
104
100
	int kflag = 0;
105
	char *p;
106
107
#ifndef SMALL
108
100
	setlocale(LC_CTYPE, "");
109
#endif
110
111
	/* Terminal defaults to -Cq, non-terminal defaults to -1. */
112
100
	if (isatty(STDOUT_FILENO)) {
113
7
		f_column = f_nonprint = 1;
114
	} else {
115
93
		f_singlecol = 1;
116
	}
117
118
100
	termwidth = 0;
119
100
	if ((p = getenv("COLUMNS")) != NULL)
120
		termwidth = strtonum(p, 1, INT_MAX, NULL);
121

100
	if (termwidth == 0 && ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == 0 &&
122
	    win.ws_col > 0)
123
7
		termwidth = win.ws_col;
124
100
	if (termwidth == 0)
125
93
		termwidth = 80;
126
127
100
	if (pledge("stdio rpath getpw wpath cpath", NULL) == -1)
128
		err(1, "pledge");
129
130
	/* Root is -A automatically. */
131
100
	if (!getuid())
132
100
		f_listdot = 1;
133
134
100
	fts_options = FTS_PHYSICAL;
135
209
	while ((ch = getopt(argc, argv, "1ACFHLRSTacdfghiklmnopqrstux")) != -1) {
136







9
		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
1
			f_singlecol = 1;
143
1
			f_column = f_columnacross = f_longform = 0;
144
1
			f_numericonly = f_stream = 0;
145
1
			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
			f_longform = 1;
159
			f_grouponly = -1;	/* -l always overrides -g */
160
			f_column = f_columnacross = f_singlecol = f_stream = 0;
161
			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
			fts_options |= FTS_SEEDOT;
204
			/* FALLTHROUGH */
205
		case 'A':
206
			f_listdot = 1;
207
			break;
208
		/* The -d option turns off the -R option. */
209
		case 'd':
210
4
			f_listdir = 1;
211
4
			f_recursive = 0;
212
4
			break;
213
		case 'h':
214
			f_humanval = 1;
215
			break;
216
		case 'i':
217
4
			f_inode = 1;
218
4
			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
100
	argc -= optind;
252
100
	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
100
	if (f_grouponly == -1)
259
		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



100
	if (!f_longform && !f_inode && !f_size && !f_type && !f_typedir &&
266
	    sortkey == BY_NAME)
267
96
		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

100
	if (!f_longform && !f_listdir && !f_type)
274
96
		fts_options |= FTS_COMFOLLOW;
275
276
	/* If -l or -s, figure out block size. */
277

100
	if (f_longform || f_size) {
278
		if (!kflag)
279
			(void)getbsize(&notused, &blocksize);
280
		blocksize /= 512;
281
	}
282
283
	/* Select a sort function. */
284
100
	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

100
		switch (sortkey) {
303
		case BY_NAME:
304
100
			sortfcn = namecmp;
305
100
			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
100
	if (f_singlecol)
322
94
		printfcn = printscol;
323
6
	else if (f_columnacross)
324
		printfcn = printacol;
325
6
	else if (f_longform)
326
		printfcn = printlong;
327
6
	else if (f_stream)
328
		printfcn = printstream;
329
	else
330
6
		printfcn = printcol;
331
332
100
	if (argc)
333
5
		traverse(argc, argv, fts_options);
334
	else
335
95
		traverse(1, dotav, fts_options);
336
100
	return (rval);
337
}
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
100
{
350
	FTS *ftsp;
351
	FTSENT *p, *chp;
352
	int ch_options, saved_errno;
353
354

100
	if ((ftsp =
355
	    fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL)
356
		err(1, NULL);
357
358
100
	display(NULL, fts_children(ftsp, 0));
359
100
	if (f_listdir)
360
4
		return;
361
362
	/*
363
	 * If not recursing down this tree and don't need stat info, just get
364
	 * the names.
365
	 */
366

96
	ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0;
367
368
384
	while ((p = fts_read(ftsp)) != NULL)
369

192
		switch (p->fts_info) {
370
		case FTS_D:
371

96
			if (p->fts_name[0] == '.' &&
372
			    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
96
			if (output)
381
				(void)printf("\n%s:\n", p->fts_path);
382
96
			else if (argc > 1) {
383
				(void)printf("%s:\n", p->fts_path);
384
				output = 1;
385
			}
386
387
96
			chp = fts_children(ftsp, ch_options);
388
96
			saved_errno = errno;
389
96
			display(p, chp);
390
391
			/*
392
			 * On fts_children() returning error do recurse to see
393
			 * the error.
394
			 */
395

96
			if (!f_recursive && !(chp == NULL && saved_errno != 0))
396
96
				(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
96
	if (errno)
409
		err(1, "fts_read");
410
411
96
	fts_close(ftsp);
412
}
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
196
{
422
	struct stat *sp;
423
	DISPLAY d;
424
	FTSENT *cur;
425
	NAMES *np;
426
	off_t maxsize;
427
	u_long maxlen, maxnlink;
428
	unsigned long long btotal, maxblock;
429
	ino_t maxinode;
430
	int bcfile, flen, glen, ulen, maxflags, maxgroup, maxuser;
431
	int entries, needstats;
432
	int width;
433
	char *user, *group, buf[21];	/* 64 bits == 20 digits */
434
	char nuser[12], ngroup[12];
435
196
	char *flags = NULL;
436
437
	/*
438
	 * If list is NULL there are two possibilities: that the parent
439
	 * directory p has no children, or that fts_children() returned an
440
	 * error.  We ignore the error case since it will be replicated
441
	 * on the next call to fts_read() on the post-order visit to the
442
	 * directory p, and will be signalled in traverse().
443
	 */
444
196
	if (list == NULL)
445
		return;
446
447

196
	needstats = f_inode || f_longform || f_size;
448
196
	flen = 0;
449
196
	btotal = maxblock = maxinode = maxlen = maxnlink = 0;
450
196
	bcfile = 0;
451
196
	maxuser = maxgroup = maxflags = 0;
452
196
	maxsize = 0;
453
3094
	for (cur = list, entries = 0; cur != NULL; cur = cur->fts_link) {
454
2898
		if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) {
455
			warnx("%s: %s",
456
			    cur->fts_name, strerror(cur->fts_errno));
457
			cur->fts_number = NO_PRINT;
458
			rval = 1;
459
			continue;
460
		}
461
462
		/*
463
		 * P is NULL if list is the argv list, to which different rules
464
		 * apply.
465
		 */
466
2898
		if (p == NULL) {
467
			/* Directories will be displayed later. */
468

100
			if (cur->fts_info == FTS_D && !f_listdir) {
469
96
				cur->fts_number = NO_PRINT;
470
96
				continue;
471
			}
472
		} else {
473
			/* Only display dot file if -a/-A set. */
474

2798
			if (cur->fts_name[0] == '.' && !f_listdot) {
475
				cur->fts_number = NO_PRINT;
476
				continue;
477
			}
478
		}
479
2802
		if ((width = mbsprint(cur->fts_name, 0)) > maxlen)
480
387
			maxlen = width;
481
2802
		if (needstats) {
482
4
			sp = cur->fts_statp;
483
4
			if (sp->st_blocks > maxblock)
484
4
				maxblock = sp->st_blocks;
485
4
			if (sp->st_ino > maxinode)
486
4
				maxinode = sp->st_ino;
487
4
			if (sp->st_nlink > maxnlink)
488
4
				maxnlink = sp->st_nlink;
489
4
			if (sp->st_size > maxsize)
490
4
				maxsize = sp->st_size;
491
492
4
			btotal += sp->st_blocks;
493
4
			if (f_longform) {
494
				if (f_numericonly) {
495
					snprintf(nuser, 12, "%u", sp->st_uid);
496
					snprintf(ngroup, 12, "%u", sp->st_gid);
497
					user = nuser;
498
					group = ngroup;
499
				} else {
500
					user = user_from_uid(sp->st_uid, 0);
501
					group = group_from_gid(sp->st_gid, 0);
502
				}
503
				if ((ulen = strlen(user)) > maxuser)
504
					maxuser = ulen;
505
				if ((glen = strlen(group)) > maxgroup)
506
					maxgroup = glen;
507
				if (f_flags) {
508
					flags = fflagstostr(sp->st_flags);
509
					if (*flags == '\0')
510
						flags = "-";
511
					if ((flen = strlen(flags)) > maxflags)
512
						maxflags = flen;
513
				} else
514
					flen = 0;
515
516
				if ((np = malloc(sizeof(NAMES) +
517
				    ulen + 1 + glen + 1 + flen + 1)) == NULL)
518
					err(1, NULL);
519
520
				np->user = &np->data[0];
521
				(void)strlcpy(np->user, user, ulen + 1);
522
				np->group = &np->data[ulen + 1];
523
				(void)strlcpy(np->group, group, glen + 1);
524
525
				if (S_ISCHR(sp->st_mode) ||
526
				    S_ISBLK(sp->st_mode))
527
					bcfile = 1;
528
529
				if (f_flags) {
530
					np->flags = &np->data[ulen + 1 + glen + 1];
531
				  	(void)strlcpy(np->flags, flags, flen + 1);
532
					if (*flags != '-')
533
						free(flags);
534
				}
535
				cur->fts_pointer = np;
536
			}
537
		}
538
2802
		++entries;
539
	}
540
541
196
	if (!entries)
542
96
		return;
543
544
100
	d.list = list;
545
100
	d.entries = entries;
546
100
	d.maxlen = maxlen;
547
100
	if (needstats) {
548
4
		d.bcfile = bcfile;
549
4
		d.btotal = btotal;
550
4
		(void)snprintf(buf, sizeof(buf), "%llu", maxblock);
551
4
		d.s_block = strlen(buf);
552
4
		d.s_flags = maxflags;
553
4
		d.s_group = maxgroup;
554
4
		(void)snprintf(buf, sizeof(buf), "%llu",
555
		    (unsigned long long)maxinode);
556
4
		d.s_inode = strlen(buf);
557
4
		(void)snprintf(buf, sizeof(buf), "%lu", maxnlink);
558
4
		d.s_nlink = strlen(buf);
559
4
		if (!f_humanval) {
560
4
			(void)snprintf(buf, sizeof(buf), "%lld",
561
				(long long) maxsize);
562
4
			d.s_size = strlen(buf);
563
		} else
564
			d.s_size = FMT_SCALED_STRSIZE-2; /* no - or '\0' */
565
4
		d.s_user = maxuser;
566
	}
567
568
100
	printfcn(&d);
569
100
	output = 1;
570
571
100
	if (f_longform)
572
		for (cur = list; cur != NULL; cur = cur->fts_link)
573
			free(cur->fts_pointer);
574
}
575
576
/*
577
 * Ordering for mastercmp:
578
 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories
579
 * as larger than directories.  Within either group, use the sort function.
580
 * All other levels use the sort function.  Error entries remain unsorted.
581
 */
582
static int
583
mastercmp(const FTSENT **a, const FTSENT **b)
584
23702
{
585
	int a_info, b_info;
586
587
23702
	a_info = (*a)->fts_info;
588
23702
	if (a_info == FTS_ERR)
589
		return (0);
590
23702
	b_info = (*b)->fts_info;
591
23702
	if (b_info == FTS_ERR)
592
		return (0);
593
594
23702
	if (a_info == FTS_NS || b_info == FTS_NS) {
595
		if (b_info != FTS_NS)
596
			return (1);
597
		else if (a_info != FTS_NS)
598
			return (-1);
599
		else
600
			return (namecmp(*a, *b));
601
	}
602
603

23702
	if (a_info != b_info &&
604
	    (*a)->fts_level == FTS_ROOTLEVEL && !f_listdir) {
605
		if (a_info == FTS_D)
606
			return (1);
607
		if (b_info == FTS_D)
608
			return (-1);
609
	}
610
23702
	return (sortfcn(*a, *b));
611
}