2 * Copyright (c) 1990, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#) Copyright (c) 1990, 1993, 1994 The Regents of the University of California. All rights reserved.
30 * @(#)rm.c 8.5 (Berkeley) 4/18/94
31 * $FreeBSD: src/bin/rm/rm.c,v 1.29.2.5 2002/07/12 07:25:48 tjr Exp $
35 #include <sys/param.h>
36 #include <sys/mount.h>
37 #include <sys/ioctl.h>
53 static int dflag
, eval
, fflag
, iflag
, Pflag
, vflag
, Wflag
, stdin_ok
;
54 static int rflag
, Iflag
, xflag
;
56 static volatile sig_atomic_t info
;
58 static int check(const char *, const char *, struct stat
*);
59 static int check2(char **);
60 static void checkdot(char **);
61 static void rm_file(char **);
62 static int rm_overwrite(const char *, struct stat
*);
63 static void rm_tree(char **);
65 static void siginfo(int);
67 static void usage(void);
71 * This rm is different from historic rm's, but is expected to match
72 * POSIX 1003.2 behavior. The most visible difference is that -f
73 * has two specific effects now, ignore non-existent files and force
77 main(int argc
, char *argv
[])
84 * Test for the special case where the utility is called as
85 * "unlink", for which the functionality provided is greatly
88 if ((p
= strrchr(argv
[0], '/')) == NULL
)
92 if (strcmp(p
, "unlink") == 0) {
93 while (getopt(argc
, argv
, "") != -1)
103 Pflag
= rflag
= xflag
= 0;
104 while ((ch
= getopt(argc
, argv
, "dfiIPRrvWx")) != -1) {
119 * The -I flag is intended to be generally aliasable
120 * in /etc/csh.cshrc. We apply it only to foreground
123 if (ioctl(0, TIOCGPGRP
, &tty_pgrp
) == 0) {
124 if (tty_pgrp
== getpgrp())
132 case 'r': /* Compatibility. */
163 signal(SIGINFO
, siginfo
);
167 stdin_ok
= isatty(STDIN_FILENO
);
169 if (Iflag
&& !iflag
) {
170 if (check2(argv
) == 0)
192 * Remove a file hierarchy. If forcing removal (-f), or interactive
193 * (-i) or can't ask anyway (stdin_ok), don't stat the file.
195 needstat
= !uid
|| (!fflag
&& !iflag
&& stdin_ok
);
198 * If the -i option is specified, the user can skip on the pre-order
199 * visit. The fts_number field flags skipped directories.
203 flags
= FTS_PHYSICAL
;
208 flags
|= FTS_WHITEOUT
;
212 if ((fts
= fts_open(argv
, flags
, NULL
)) == NULL
) {
213 if (fflag
&& errno
== ENOENT
)
217 while ((p
= fts_read(fts
)) != NULL
) {
218 switch (p
->fts_info
) {
220 if (!fflag
|| p
->fts_errno
!= ENOENT
) {
222 p
->fts_path
, strerror(p
->fts_errno
));
227 errx(1, "%s: %s", p
->fts_path
, strerror(p
->fts_errno
));
230 * Assume that since fts_read() couldn't stat
231 * the file, it can't be unlinked.
235 if (!fflag
|| p
->fts_errno
!= ENOENT
) {
237 p
->fts_path
, strerror(p
->fts_errno
));
242 /* Pre-order: give user chance to skip. */
243 if (!fflag
&& !check(p
->fts_path
, p
->fts_accpath
,
245 fts_set(fts
, p
, FTS_SKIP
);
246 p
->fts_number
= SKIPPED
;
248 #ifdef _ST_FLAGS_PRESENT_
250 (p
->fts_statp
->st_flags
& (UF_APPEND
|UF_IMMUTABLE
)) &&
251 !(p
->fts_statp
->st_flags
& (SF_APPEND
|SF_IMMUTABLE
)) &&
252 lchflags(p
->fts_accpath
,
253 p
->fts_statp
->st_flags
&= ~(UF_APPEND
|UF_IMMUTABLE
)) < 0)
258 /* Post-order: see if user skipped. */
259 if (p
->fts_number
== SKIPPED
)
264 !check(p
->fts_path
, p
->fts_accpath
, p
->fts_statp
))
270 fprintf(stderr
, "Currently removing: %s\n", p
->fts_path
);
274 #ifdef _ST_FLAGS_PRESENT_
276 (p
->fts_statp
->st_flags
& (UF_APPEND
|UF_IMMUTABLE
)) &&
277 !(p
->fts_statp
->st_flags
& (SF_APPEND
|SF_IMMUTABLE
)))
278 rval
= lchflags(p
->fts_accpath
,
279 p
->fts_statp
->st_flags
&= ~(UF_APPEND
|UF_IMMUTABLE
));
284 * If we can't read or search the directory, may still be
285 * able to remove it. Don't print out the un{read,search}able
286 * message unless the remove fails.
288 switch (p
->fts_info
) {
291 rval
= rmdir(p
->fts_accpath
);
292 if (rval
== 0 || (fflag
&& errno
== ENOENT
)) {
293 if (rval
== 0 && vflag
)
301 rval
= undelete(p
->fts_accpath
);
302 if (rval
== 0 && (fflag
&& errno
== ENOENT
)) {
312 * Assume that since fts_read() couldn't stat
313 * the file, it can't be unlinked.
320 if (!rm_overwrite(p
->fts_accpath
, NULL
))
322 rval
= unlink(p
->fts_accpath
);
323 if (rval
== 0 || (fflag
&& errno
== ENOENT
)) {
324 if (rval
== 0 && vflag
)
331 #ifdef _ST_FLAGS_PRESENT_
334 warn("%s", p
->fts_path
);
350 * Remove a file. POSIX 1003.2 states that, by default, attempting
351 * to remove a directory is an error, so must always stat the file.
353 while ((f
= *argv
++) != NULL
) {
356 fprintf(stderr
, "Currently removing: %s\n", f
);
359 /* Assume if can't stat the file, can't unlink it. */
363 sb
.st_mode
= S_IFWHT
|S_IWUSR
|S_IRUSR
;
366 if (!fflag
|| errno
!= ENOENT
) {
373 warnx("%s: %s", f
, strerror(EEXIST
));
378 if (S_ISDIR(sb
.st_mode
) && !dflag
) {
379 warnx("%s: is a directory", f
);
383 if (!fflag
&& !S_ISWHT(sb
.st_mode
) && !check(f
, f
, &sb
))
386 #ifdef _ST_FLAGS_PRESENT_
387 if (!uid
&& !S_ISWHT(sb
.st_mode
) &&
388 (sb
.st_flags
& (UF_APPEND
|UF_IMMUTABLE
)) &&
389 !(sb
.st_flags
& (SF_APPEND
|SF_IMMUTABLE
)))
390 rval
= lchflags(f
, sb
.st_flags
& ~(UF_APPEND
|UF_IMMUTABLE
));
394 if (S_ISWHT(sb
.st_mode
))
398 if (S_ISDIR(sb
.st_mode
))
402 if (!rm_overwrite(f
, &sb
))
407 if (rval
&& (!fflag
|| errno
!= ENOENT
)) {
411 if (vflag
&& rval
== 0)
418 * Overwrite the file 3 times with varying bit patterns.
421 * This is a cheap way to *really* delete files. Note that only regular
422 * files are deleted, directories (and therefore names) will remain.
423 * Also, this assumes a fixed-block filesystem (like FFS, or a V7 or a
424 * System V filesystem). In a logging filesystem, you'll have to have
428 rm_overwrite(const char *file
, struct stat
*sbp
)
438 if (lstat(file
, &sb
))
442 if (!S_ISREG(sbp
->st_mode
)) {
443 warnx("%s: cannot overwrite a non-regular file", file
);
446 if (sbp
->st_nlink
> 1) {
447 warnx("%s (inode %ju): not overwritten due to multiple links",
448 file
, (uintmax_t)sbp
->st_ino
);
451 if ((fd
= open(file
, O_WRONLY
, 0)) == -1)
453 if (fstatfs(fd
, &fsb
) == -1)
455 bsize
= MAX(fsb
.f_iosize
, 1024);
456 if ((buf
= malloc(bsize
)) == NULL
)
457 err(1, "%s malloc failed", file
);
459 #define PASS(byte) { \
460 memset(buf, byte, bsize); \
461 for (len = sbp->st_size; len > 0; len -= wlen) { \
462 wlen = len < bsize ? len : bsize; \
463 if (write(fd, buf, wlen) != wlen) \
468 if (fsync(fd
) || lseek(fd
, (off_t
)0, SEEK_SET
))
471 if (fsync(fd
) || lseek(fd
, (off_t
)0, SEEK_SET
))
474 if (!fsync(fd
) && !close(fd
)) {
490 check(const char *path
, const char *name
, struct stat
*sp
)
492 static int perm_answer
= -1;
498 } *choice
, choices
[] = {
499 { 'y', "yes" , 1, 0 },
500 { 'n', "no" , 0, 0 },
501 { 'a', "always", 1, 1 },
502 { 'v', "never" , 0, 1 },
505 char modep
[15], *flagsp
= NULL
;
507 if (perm_answer
!= -1)
508 return (perm_answer
);
510 /* Check -i first. */
512 fprintf(stderr
, "remove %s? ", path
);
515 * If it's not a symbolic link and it's unwritable and we're
516 * talking to a terminal, ask. Symbolic links are excluded
517 * because their permissions are meaningless. Check stdin_ok
518 * first because we may not have stat'ed the file.
519 * Also skip this check if the -P option was specified because
520 * we will not be able to overwrite file contents and will
523 if (!stdin_ok
|| S_ISLNK(sp
->st_mode
) || Pflag
||
525 #ifdef _ST_FLAGS_PRESENT_
526 && !(sp
->st_flags
& (SF_APPEND
|SF_IMMUTABLE
)) &&
527 (!(sp
->st_flags
& (UF_APPEND
|UF_IMMUTABLE
)) || !uid
)
531 strmode(sp
->st_mode
, modep
);
532 #ifdef _ST_FLAGS_PRESENT_
533 if ((flagsp
= fflagstostr(sp
->st_flags
)) == NULL
)
536 fprintf(stderr
, "override %s%s%s/%s %s%sfor %s? ",
537 modep
+ 1, modep
[9] == ' ' ? "" : " ",
538 user_from_uid(sp
->st_uid
, 0),
539 group_from_gid(sp
->st_gid
, 0),
540 *flagsp
? flagsp
: "", *flagsp
? " " : "",
550 answer
= fgetln(stdin
, &len
);
551 /* clearerr(stdin); */
554 if (answer
[len
- 1] == '\n')
559 for (choice
= choices
; choice
->str
!= NULL
; choice
++) {
560 if (len
== 1 && choice
->ch
== answer
[0])
562 if (strncasecmp(answer
, choice
->str
, len
) == 0)
566 fprintf(stderr
, "invalid answer, try again (y/n/a/v): ");
571 perm_answer
= choice
->res
;
572 return (choice
->res
);
584 const char *dname
= NULL
;
586 for (i
= 0; argv
[i
]; ++i
) {
587 if (lstat(argv
[i
], &st
) == 0) {
588 if (S_ISDIR(st
.st_mode
)) {
590 dname
= argv
[i
]; /* only used if 1 dir */
597 while (first
!= 'n' && first
!= 'N' && first
!= 'y' && first
!= 'Y') {
598 if (dcount
&& rflag
) {
599 fprintf(stderr
, "recursively remove");
601 fprintf(stderr
, " %s", dname
);
603 fprintf(stderr
, " %d dirs", dcount
);
605 fprintf(stderr
, " and 1 file");
607 fprintf(stderr
, " and %d files", fcount
);
608 } else if (dcount
+ fcount
> 3) {
609 fprintf(stderr
, "remove %d files", dcount
+ fcount
);
613 fprintf(stderr
, "? ");
616 first
= ch
= getchar();
617 while (ch
!= '\n' && ch
!= EOF
)
622 return (first
== 'y' || first
== 'Y');
625 #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
627 checkdot(char **argv
)
629 char *p
, **save
, **t
;
633 for (t
= argv
; *t
;) {
634 if ((p
= strrchr(*t
, '/')) != NULL
)
640 warnx("\".\" and \"..\" may not be removed");
642 for (save
= t
; (t
[0] = t
[1]) != NULL
; ++t
)
654 fprintf(stderr
, "%s\n%s\n",
655 "usage: rm [-f | -i] [-dIPRrvWx] file ...",
662 siginfo(int notused __unused
)