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- Committer: stacktic
- Date: 2009-03-23 21:04:00 UTC
- Revision ID: svn-v4:288d5a72-fed7-e111-8680-000c29dcf8fe:trunk:1946
Imported fs-utils binaries
- files added:
- bin
- bin/chmod
- bin/cp
- bin/fsu_cat
- bin/fsu_chmod
- bin/fsu_console
- bin/fsu_cp
- bin/fsu_diff
- bin/fsu_ecp
- bin/fsu_exec
- bin/fsu_find
- bin/fsu_ln
- bin/fsu_ls
- bin/fsu_mkdir
- bin/fsu_mv
- bin/fsu_rm
- bin/fsu_rmdir
- bin/fsu_write
- bin/ln
- bin/ls
- bin/mkdir
- bin/rm
- bin/rmdir
- sbin
- sbin/fsu_mknod
- sbin/mknod
- usr.bin/chflags
- usr.bin/du
- usr.bin/fsu_chflags
- usr.bin/fsu_du
- usr.bin/fsu_mkfifo
- usr.bin/fsu_touch
- usr.bin/mkfifo
- usr.sbin/chown
- usr.sbin/fsu_chown
- files modified:
- Makefile
added
removed
bin/rm/rm.c
1
/* $NetBSD$ */
2
/* from */
3
/* NetBSD: rm.c,v 1.49 2009/02/14 08:05:04 lukem Exp */
4
5
/*-
6
* Copyright (c) 1990, 1993, 1994, 2003
7
* The Regents of the University of California. All rights reserved.
8
*
9
* Redistribution and use in source and binary forms, with or without
10
* modification, are permitted provided that the following conditions
11
* are met:
12
* 1. Redistributions of source code must retain the above copyright
13
* notice, this list of conditions and the following disclaimer.
14
* 2. Redistributions in binary form must reproduce the above copyright
15
* notice, this list of conditions and the following disclaimer in the
16
* documentation and/or other materials provided with the distribution.
17
* 3. Neither the name of the University nor the names of its contributors
18
* may be used to endorse or promote products derived from this software
19
* without specific prior written permission.
20
*
21
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31
* SUCH DAMAGE.
32
*/
33
34
#include <sys/cdefs.h>
35
#ifndef lint
36
__COPYRIGHT("@(#) Copyright (c) 1990, 1993, 1994\
37
The Regents of the University of California. All rights reserved.");
38
#endif /* not lint */
39
40
#ifndef lint
41
#if 0
42
static char sccsid[] = "@(#)rm.c 8.8 (Berkeley) 4/27/95";
43
#else
44
__RCSID("$NetBSD: rm.c,v 1.49 2009/02/14 08:05:04 lukem Exp $");
45
#endif
46
#endif /* not lint */
47
48
#include <sys/param.h>
49
#include <sys/stat.h>
50
#include <sys/types.h>
51
52
#include <err.h>
53
#include <errno.h>
54
#include <fcntl.h>
55
#ifndef USE_UKFS
56
#include <fts.h>
57
#endif
58
#include <grp.h>
59
#include <locale.h>
60
#include <pwd.h>
61
#include <stdio.h>
62
#include <stdlib.h>
63
#include <string.h>
64
#include <unistd.h>
65
66
#ifdef USE_UKFS
67
#include <rump/ukfs.h>
68
69
#include <fts2fsufts.h>
70
#include <fsu_mount.h>
71
72
#define lstat(a, b) ukfs_lstat(ukfs, a, b)
73
#define rmdir(a) ukfs_rmdir(ukfs, a)
74
#define unlink(a) ukfs_remove(ukfs, a)
75
#define undelete(a) (0) /* not supported */
76
#define access(a, b) (0) /* we always have access */
77
78
DECLARE_UKFS(ukfs)
79
#endif
80
81
int dflag, eval, fflag, iflag, Pflag, stdin_ok, vflag, Wflag;
82
83
int check(char *, char *, struct stat *);
84
void checkdot(char **);
85
void rm_file(char **);
86
int rm_overwrite(char *, struct stat *);
87
void rm_tree(char **);
88
void usage(void);
89
int main(int, char *[]);
90
91
/*
92
* For the sake of the `-f' flag, check whether an error number indicates the
93
* failure of an operation due to an non-existent file, either per se (ENOENT)
94
* or because its filename argument was illegal (ENAMETOOLONG, ENOTDIR).
95
*/
96
#define NONEXISTENT(x) \
97
((x) == ENOENT || (x) == ENAMETOOLONG || (x) == ENOTDIR)
98
99
/*
100
* rm --
101
* This rm is different from historic rm's, but is expected to match
102
* POSIX 1003.2 behavior. The most visible difference is that -f
103
* has two specific effects now, ignore non-existent files and force
104
* file removal.
105
*/
106
int
107
main(int argc, char *argv[])
108
{
109
int ch, rflag;
110
111
setprogname(argv[0]);
112
(void)setlocale(LC_ALL, "");
113
114
#ifdef USE_UKFS
115
FSU_MOUNT(argc, argv, ukfs);
116
#endif
117
118
Pflag = rflag = 0;
119
while ((ch = getopt(argc, argv, "dfiPRrvW")) != -1)
120
switch (ch) {
121
case 'd':
122
dflag = 1;
123
break;
124
case 'f':
125
fflag = 1;
126
iflag = 0;
127
break;
128
case 'i':
129
fflag = 0;
130
iflag = 1;
131
break;
132
case 'P':
133
Pflag = 1;
134
break;
135
case 'R':
136
case 'r': /* Compatibility. */
137
rflag = 1;
138
break;
139
case 'v':
140
vflag = 1;
141
break;
142
case 'W':
143
Wflag = 1;
144
break;
145
case '?':
146
default:
147
usage();
148
}
149
argc -= optind;
150
argv += optind;
151
152
if (argc < 1) {
153
if (fflag)
154
return 0;
155
usage();
156
}
157
158
checkdot(argv);
159
160
if (*argv) {
161
stdin_ok = isatty(STDIN_FILENO);
162
163
if (rflag)
164
rm_tree(argv);
165
else
166
rm_file(argv);
167
}
168
169
exit(eval);
170
/* NOTREACHED */
171
}
172
173
void
174
rm_tree(char **argv)
175
{
176
FTS *fts;
177
FTSENT *p;
178
int flags, needstat, rval;
179
180
/*
181
* Remove a file hierarchy. If forcing removal (-f), or interactive
182
* (-i) or can't ask anyway (stdin_ok), don't stat the file.
183
*/
184
needstat = !fflag && !iflag && stdin_ok;
185
186
/*
187
* If the -i option is specified, the user can skip on the pre-order
188
* visit. The fts_number field flags skipped directories.
189
*/
190
#define SKIPPED 1
191
192
flags = FTS_PHYSICAL;
193
if (!needstat)
194
flags |= FTS_NOSTAT;
195
if (Wflag)
196
flags |= FTS_WHITEOUT;
197
if ((fts = fts_open(argv, flags, NULL)) == NULL)
198
err(1, "fts_open failed");
199
while ((p = fts_read(fts)) != NULL) {
200
201
switch (p->fts_info) {
202
case FTS_DNR:
203
if (!fflag || p->fts_errno != ENOENT) {
204
warnx("%s: %s", p->fts_path,
205
strerror(p->fts_errno));
206
eval = 1;
207
}
208
continue;
209
case FTS_ERR:
210
errx(EXIT_FAILURE, "%s: %s", p->fts_path,
211
strerror(p->fts_errno));
212
/* NOTREACHED */
213
case FTS_NS:
214
/*
215
* FTS_NS: assume that if can't stat the file, it
216
* can't be unlinked.
217
*/
218
if (fflag && NONEXISTENT(p->fts_errno))
219
continue;
220
if (needstat) {
221
warnx("%s: %s", p->fts_path,
222
strerror(p->fts_errno));
223
eval = 1;
224
continue;
225
}
226
break;
227
case FTS_D:
228
/* Pre-order: give user chance to skip. */
229
if (!fflag && !check(p->fts_path, p->fts_accpath,
230
p->fts_statp)) {
231
(void)fts_set(fts, p, FTS_SKIP);
232
p->fts_number = SKIPPED;
233
}
234
continue;
235
case FTS_DP:
236
/* Post-order: see if user skipped. */
237
if (p->fts_number == SKIPPED)
238
continue;
239
break;
240
default:
241
if (!fflag &&
242
!check(p->fts_path, p->fts_accpath, p->fts_statp))
243
continue;
244
}
245
246
rval = 0;
247
/*
248
* If we can't read or search the directory, may still be
249
* able to remove it. Don't print out the un{read,search}able
250
* message unless the remove fails.
251
*/
252
switch (p->fts_info) {
253
case FTS_DP:
254
case FTS_DNR:
255
rval = rmdir(p->fts_accpath);
256
if (rval != 0 && fflag && errno == ENOENT)
257
continue;
258
break;
259
260
case FTS_W:
261
rval = undelete(p->fts_accpath);
262
if (rval != 0 && fflag && errno == ENOENT)
263
continue;
264
break;
265
266
default:
267
if (Pflag) {
268
if (rm_overwrite(p->fts_accpath, NULL))
269
continue;
270
}
271
rval = unlink(p->fts_accpath);
272
if (rval != 0 && fflag && NONEXISTENT(errno))
273
continue;
274
break;
275
}
276
if (rval != 0) {
277
warn("%s", p->fts_path);
278
eval = 1;
279
} else if (vflag)
280
(void)printf("%s\n", p->fts_path);
281
}
282
if (errno)
283
err(1, "fts_read");
284
fts_close(fts);
285
}
286
287
void
288
rm_file(char **argv)
289
{
290
struct stat sb;
291
int rval;
292
char *f;
293
294
/*
295
* Remove a file. POSIX 1003.2 states that, by default, attempting
296
* to remove a directory is an error, so must always stat the file.
297
*/
298
while ((f = *argv++) != NULL) {
299
/* Assume if can't stat the file, can't unlink it. */
300
if (lstat(f, &sb)) {
301
if (Wflag) {
302
sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR;
303
} else {
304
if (!fflag || !NONEXISTENT(errno)) {
305
warn("%s", f);
306
eval = 1;
307
}
308
continue;
309
}
310
} else if (Wflag) {
311
warnx("%s: %s", f, strerror(EEXIST));
312
eval = 1;
313
continue;
314
}
315
316
if (S_ISDIR(sb.st_mode) && !dflag) {
317
warnx("%s: is a directory", f);
318
eval = 1;
319
continue;
320
}
321
if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb))
322
continue;
323
if (S_ISWHT(sb.st_mode))
324
rval = undelete(f);
325
else if (S_ISDIR(sb.st_mode))
326
rval = rmdir(f);
327
else {
328
if (Pflag) {
329
if (rm_overwrite(f, &sb))
330
continue;
331
}
332
rval = unlink(f);
333
}
334
if (rval && (!fflag || !NONEXISTENT(errno))) {
335
warn("%s", f);
336
eval = 1;
337
}
338
if (vflag && rval == 0)
339
(void)printf("%s\n", f);
340
}
341
}
342
343
/*
344
* rm_overwrite --
345
* Overwrite the file 3 times with varying bit patterns.
346
*
347
* This is an expensive way to keep people from recovering files from your
348
* non-snapshotted FFS filesystems using fsdb(8). Really. No more. Only
349
* regular files are deleted, directories (and therefore names) will remain.
350
* Also, this assumes a fixed-block file system (like FFS, or a V7 or a
351
* System V file system). In a logging file system, you'll have to have
352
* kernel support.
353
*
354
* A note on standards: U.S. DoD 5220.22-M "National Industrial Security
355
* Program Operating Manual" ("NISPOM") is often cited as a reference
356
* for clearing and sanitizing magnetic media. In fact, a matrix of
357
* "clearing" and "sanitization" methods for various media was given in
358
* Chapter 8 of the original 1995 version of NISPOM. However, that
359
* matrix was *removed from the document* when Chapter 8 was rewritten
360
* in Change 2 to the document in 2001. Recently, the Defense Security
361
* Service has made a revised clearing and sanitization matrix available
362
* in Microsoft Word format on the DSS web site. The standardization
363
* status of this matrix is unclear. Furthermore, one must be very
364
* careful when referring to this matrix: it is intended for the "clearing"
365
* prior to reuse or "sanitization" prior to disposal of *entire media*,
366
* not individual files and the only non-physically-destructive method of
367
* "sanitization" that is permitted for magnetic disks of any kind is
368
* specifically noted to be prohibited for media that have contained
369
* Top Secret data.
370
*
371
* It is impossible to actually conform to the exact procedure given in
372
* the matrix if one is overwriting a file, not an entire disk, because
373
* the procedure requires examination and comparison of the disk's defect
374
* lists. Any program that claims to securely erase *files* while
375
* conforming to the standard, then, is not correct. We do as much of
376
* what the standard requires as can actually be done when erasing a
377
* file, rather than an entire disk; but that does not make us conformant.
378
*
379
* Furthermore, the presence of track caches, disk and controller write
380
* caches, and so forth make it extremely difficult to ensure that data
381
* have actually been written to the disk, particularly when one tries
382
* to repeatedly overwrite the same sectors in quick succession. We call
383
* fsync(), but controllers with nonvolatile cache, as well as IDE disks
384
* that just plain lie about the stable storage of data, will defeat this.
385
*
386
* Finally, widely respected research suggests that the given procedure
387
* is nowhere near sufficient to prevent the recovery of data using special
388
* forensic equipment and techniques that are well-known. This is
389
* presumably one reason that the matrix requires physical media destruction,
390
* rather than any technique of the sort attempted here, for secret data.
391
*
392
* Caveat Emptor.
393
*
394
* rm_overwrite will return 0 on success.
395
*/
396
397
int
398
rm_overwrite(char *file, struct stat *sbp)
399
{
400
#ifdef USE_UKFS
401
return 0;
402
#endif
403
struct stat sb;
404
int fd, randint;
405
char randchar;
406
407
fd = -1;
408
if (sbp == NULL) {
409
if (lstat(file, &sb))
410
goto err;
411
sbp = &sb;
412
}
413
if (!S_ISREG(sbp->st_mode))
414
return 0;
415
416
/* flags to try to defeat hidden caching by forcing seeks */
417
if ((fd = open(file, O_RDWR|O_SYNC|O_RSYNC, 0)) == -1)
418
goto err;
419
420
#define RAND_BYTES 1
421
#define THIS_BYTE 0
422
423
#define WRITE_PASS(mode, byte) do { \
424
off_t len; \
425
size_t wlen, i; \
426
char buf[8 * 1024]; \
427
\
428
if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET)) \
429
goto err; \
430
\
431
if (mode == THIS_BYTE) \
432
memset(buf, byte, sizeof(buf)); \
433
for (len = sbp->st_size; len > 0; len -= wlen) { \
434
if (mode == RAND_BYTES) { \
435
for (i = 0; i < sizeof(buf); \
436
i+= sizeof(u_int32_t)) \
437
*(int *)(buf + i) = arc4random(); \
438
} \
439
wlen = len < (off_t)sizeof(buf) ? (size_t)len : sizeof(buf); \
440
if ((size_t)write(fd, buf, wlen) != wlen) \
441
goto err; \
442
} \
443
sync(); /* another poke at hidden caches */ \
444
} while (/* CONSTCOND */ 0)
445
446
#define READ_PASS(byte) do { \
447
off_t len; \
448
size_t rlen; \
449
char pattern[8 * 1024]; \
450
char buf[8 * 1024]; \
451
\
452
if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET)) \
453
goto err; \
454
\
455
memset(pattern, byte, sizeof(pattern)); \
456
for(len = sbp->st_size; len > 0; len -= rlen) { \
457
rlen = len < (off_t)sizeof(buf) ? (size_t)len : sizeof(buf); \
458
if((size_t)read(fd, buf, rlen) != rlen) \
459
goto err; \
460
if(memcmp(buf, pattern, rlen)) \
461
goto err; \
462
} \
463
sync(); /* another poke at hidden caches */ \
464
} while (/* CONSTCOND */ 0)
465
466
/*
467
* DSS sanitization matrix "clear" for magnetic disks:
468
* option 'c' "Overwrite all addressable locations with a single
469
* character."
470
*/
471
randint = arc4random();
472
randchar = *(char *)&randint;
473
WRITE_PASS(THIS_BYTE, randchar);
474
475
/*
476
* DSS sanitization matrix "sanitize" for magnetic disks:
477
* option 'd', sub 2 "Overwrite all addressable locations with a
478
* character, then its complement. Verify "complement" character
479
* was written successfully to all addressable locations, then
480
* overwrite all addressable locations with random characters; or
481
* verify third overwrite of random characters." The rest of the
482
* text in d-sub-2 specifies requirements for overwriting spared
483
* sectors; we cannot conform to it when erasing only a file, thus
484
* we do not conform to the standard.
485
*/
486
487
/* 1. "a character" */
488
WRITE_PASS(THIS_BYTE, 0xff);
489
490
/* 2. "its complement" */
491
WRITE_PASS(THIS_BYTE, 0x00);
492
493
/* 3. "Verify 'complement' character" */
494
READ_PASS(0x00);
495
496
/* 4. "overwrite all addressable locations with random characters" */
497
498
WRITE_PASS(RAND_BYTES, 0x00);
499
500
/*
501
* As the file might be huge, and we note that this revision of
502
* the matrix says "random characters", not "a random character"
503
* as the original did, we do not verify the random-character
504
* write; the "or" in the standard allows this.
505
*/
506
507
if (close(fd) == -1) {
508
fd = -1;
509
goto err;
510
}
511
512
return 0;
513
514
err: eval = 1;
515
warn("%s", file);
516
if (fd != -1)
517
close(fd);
518
return 1;
519
}
520
521
int
522
check(char *path, char *name, struct stat *sp)
523
{
524
int ch, first;
525
char modep[15];
526
527
/* Check -i first. */
528
if (iflag)
529
(void)fprintf(stderr, "remove '%s'? ", path);
530
else {
531
/*
532
* If it's not a symbolic link and it's unwritable and we're
533
* talking to a terminal, ask. Symbolic links are excluded
534
* because their permissions are meaningless. Check stdin_ok
535
* first because we may not have stat'ed the file.
536
*/
537
if (!stdin_ok || S_ISLNK(sp->st_mode) ||
538
!(access(name, W_OK) && (errno != ETXTBSY)))
539
return (1);
540
strmode(sp->st_mode, modep);
541
if (Pflag) {
542
warnx(
543
"%s: -P was specified but file could not"
544
" be overwritten", path);
545
return 0;
546
}
547
(void)fprintf(stderr, "override %s%s%s:%s for '%s'? ",
548
modep + 1, modep[9] == ' ' ? "" : " ",
549
user_from_uid(sp->st_uid, 0),
550
group_from_gid(sp->st_gid, 0), path);
551
}
552
(void)fflush(stderr);
553
554
first = ch = getchar();
555
while (ch != '\n' && ch != EOF)
556
ch = getchar();
557
return (first == 'y' || first == 'Y');
558
}
559
560
/*
561
* POSIX.2 requires that if "." or ".." are specified as the basename
562
* portion of an operand, a diagnostic message be written to standard
563
* error and nothing more be done with such operands.
564
*
565
* Since POSIX.2 defines basename as the final portion of a path after
566
* trailing slashes have been removed, we'll remove them here.
567
*/
568
#define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
569
void
570
checkdot(char **argv)
571
{
572
char *p, **save, **t;
573
int complained;
574
575
complained = 0;
576
for (t = argv; *t;) {
577
/* strip trailing slashes */
578
p = strrchr(*t, '\0');
579
while (--p > *t && *p == '/')
580
*p = '\0';
581
582
/* extract basename */
583
if ((p = strrchr(*t, '/')) != NULL)
584
++p;
585
else
586
p = *t;
587
588
if (ISDOT(p)) {
589
if (!complained++)
590
warnx("\".\" and \"..\" may not be removed");
591
eval = 1;
592
for (save = t; (t[0] = t[1]) != NULL; ++t)
593
continue;
594
t = save;
595
} else
596
++t;
597
}
598
}
599
600
void
601
usage(void)
602
{
603
604
605
#ifdef USE_UKFS
606
(void)fprintf(stderr, "usage: %s %s [-f|-i] [-dPRrvW] file ...\n",
607
getprogname(), fsu_mount_usage());
608
#else
609
(void)fprintf(stderr, "usage: %s [-f|-i] [-dPRrvW] file ...\n",
610
getprogname());
611
#endif
612
613
exit(1);
614
/* NOTREACHED */
615
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.1