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 * 4. 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
32 static const char copyright[] =
33 "@(#) Copyright (c) 1990, 1993, 1994\n\
34 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)rm.c 8.5 (Berkeley) 4/18/94";
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
45 #include <sys/param.h>
46 #include <sys/mount.h>
62 static int dflag, eval, fflag, iflag, Pflag, vflag, Wflag, stdin_ok;
63 static int rflag, Iflag, xflag;
65 static volatile sig_atomic_t info;
67 static int check(const char *, const char *, struct stat *);
68 static int check2(char **);
69 static void checkdot(char **);
70 static void checkslash(char **);
71 static void rm_file(char **);
72 static int rm_overwrite(const char *, struct stat *);
73 static void rm_tree(char **);
74 static void siginfo(int __unused);
75 static void usage(void);
79 * This rm is different from historic rm's, but is expected to match
80 * POSIX 1003.2 behavior. The most visible difference is that -f
81 * has two specific effects now, ignore non-existent files and force
85 main(int argc, char *argv[])
90 (void)setlocale(LC_ALL, "");
93 * Test for the special case where the utility is called as
94 * "unlink", for which the functionality provided is greatly
97 if ((p = strrchr(argv[0], '/')) == NULL)
101 if (strcmp(p, "unlink") == 0) {
102 while (getopt(argc, argv, "") != -1)
112 Pflag = rflag = xflag = 0;
113 while ((ch = getopt(argc, argv, "dfiIPRrvWx")) != -1)
133 case 'r': /* Compatibility. */
161 (void)signal(SIGINFO, siginfo);
163 stdin_ok = isatty(STDIN_FILENO);
166 if (check2(argv) == 0)
188 * Remove a file hierarchy. If forcing removal (-f), or interactive
189 * (-i) or can't ask anyway (stdin_ok), don't stat the file.
191 needstat = !uid || (!fflag && !iflag && stdin_ok);
194 * If the -i option is specified, the user can skip on the pre-order
195 * visit. The fts_number field flags skipped directories.
199 flags = FTS_PHYSICAL;
203 flags |= FTS_WHITEOUT;
206 if (!(fts = fts_open(argv, flags, NULL))) {
207 if (fflag && errno == ENOENT)
211 while ((p = fts_read(fts)) != NULL) {
212 switch (p->fts_info) {
214 if (!fflag || p->fts_errno != ENOENT) {
216 p->fts_path, strerror(p->fts_errno));
221 errx(1, "%s: %s", p->fts_path, strerror(p->fts_errno));
224 * Assume that since fts_read() couldn't stat the
225 * file, it can't be unlinked.
229 if (!fflag || p->fts_errno != ENOENT) {
231 p->fts_path, strerror(p->fts_errno));
236 /* Pre-order: give user chance to skip. */
237 if (!fflag && !check(p->fts_path, p->fts_accpath,
239 (void)fts_set(fts, p, FTS_SKIP);
240 p->fts_number = SKIPPED;
243 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
244 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
245 lchflags(p->fts_accpath,
246 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)) < 0)
250 /* Post-order: see if user skipped. */
251 if (p->fts_number == SKIPPED)
256 !check(p->fts_path, p->fts_accpath, p->fts_statp))
262 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
263 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)))
264 rval = lchflags(p->fts_accpath,
265 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE));
268 * If we can't read or search the directory, may still be
269 * able to remove it. Don't print out the un{read,search}able
270 * message unless the remove fails.
272 switch (p->fts_info) {
275 rval = rmdir(p->fts_accpath);
276 if (rval == 0 || (fflag && errno == ENOENT)) {
277 if (rval == 0 && vflag)
280 if (rval == 0 && info) {
290 rval = undelete(p->fts_accpath);
291 if (rval == 0 && (fflag && errno == ENOENT)) {
306 * Assume that since fts_read() couldn't stat
307 * the file, it can't be unlinked.
316 if (!rm_overwrite(p->fts_accpath, p->fts_info ==
317 FTS_NSOK ? NULL : p->fts_statp))
322 rval = unlink(p->fts_accpath);
323 if (rval == 0 || (fflag && errno == ENOENT)) {
324 if (rval == 0 && vflag)
327 if (rval == 0 && info) {
337 warn("%s", p->fts_path);
353 * Remove a file. POSIX 1003.2 states that, by default, attempting
354 * to remove a directory is an error, so must always stat the file.
356 while ((f = *argv++) != NULL) {
357 /* Assume if can't stat the file, can't unlink it. */
360 sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR;
362 if (!fflag || errno != ENOENT) {
369 warnx("%s: %s", f, strerror(EEXIST));
374 if (S_ISDIR(sb.st_mode) && !dflag) {
375 warnx("%s: is a directory", f);
379 if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb))
382 if (!uid && !S_ISWHT(sb.st_mode) &&
383 (sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
384 !(sb.st_flags & (SF_APPEND|SF_IMMUTABLE)))
385 rval = lchflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE));
387 if (S_ISWHT(sb.st_mode))
389 else if (S_ISDIR(sb.st_mode))
393 if (!rm_overwrite(f, &sb))
398 if (rval && (!fflag || errno != ENOENT)) {
402 if (vflag && rval == 0)
403 (void)printf("%s\n", f);
404 if (info && rval == 0) {
406 (void)printf("%s\n", f);
413 * Overwrite the file 3 times with varying bit patterns.
416 * This is a cheap way to *really* delete files. Note that only regular
417 * files are deleted, directories (and therefore names) will remain.
418 * Also, this assumes a fixed-block file system (like FFS, or a V7 or a
419 * System V file system). In a logging or COW file system, you'll have to
420 * have kernel support.
423 rm_overwrite(const char *file, struct stat *sbp)
433 if (lstat(file, &sb))
437 if (!S_ISREG(sbp->st_mode))
439 if (sbp->st_nlink > 1 && !fflag) {
440 warnx("%s (inode %ju): not overwritten due to multiple links",
441 file, (uintmax_t)sbp->st_ino);
444 if ((fd = open(file, O_WRONLY|O_NONBLOCK|O_NOFOLLOW, 0)) == -1)
448 if (sb2.st_dev != sbp->st_dev || sb2.st_ino != sbp->st_ino ||
449 !S_ISREG(sb2.st_mode)) {
453 if (fstatfs(fd, &fsb) == -1)
455 bsize = MAX(fsb.f_iosize, 1024);
456 if ((buf = malloc(bsize)) == NULL)
457 err(1, "%s: malloc", 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)
493 char modep[15], *flagsp;
495 /* Check -i first. */
497 (void)fprintf(stderr, "remove %s? ", path);
500 * If it's not a symbolic link and it's unwritable and we're
501 * talking to a terminal, ask. Symbolic links are excluded
502 * because their permissions are meaningless. Check stdin_ok
503 * first because we may not have stat'ed the file.
505 if (!stdin_ok || S_ISLNK(sp->st_mode) ||
506 (!access(name, W_OK) &&
507 !(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
508 (!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !uid)))
510 strmode(sp->st_mode, modep);
511 if ((flagsp = fflagstostr(sp->st_flags)) == NULL)
512 err(1, "fflagstostr");
515 "%s: -P was specified, but file is not writable",
517 (void)fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ",
518 modep + 1, modep[9] == ' ' ? "" : " ",
519 user_from_uid(sp->st_uid, 0),
520 group_from_gid(sp->st_gid, 0),
521 *flagsp ? flagsp : "", *flagsp ? " " : "",
525 (void)fflush(stderr);
527 first = ch = getchar();
528 while (ch != '\n' && ch != EOF)
530 return (first == 'y' || first == 'Y');
533 #define ISSLASH(a) ((a)[0] == '/' && (a)[1] == '\0')
535 checkslash(char **argv)
541 for (t = argv; *t;) {
544 warnx("\"/\" may not be removed");
546 for (u = t; u[0] != NULL; ++u)
563 const char *dname = NULL;
565 for (i = 0; argv[i]; ++i) {
566 if (lstat(argv[i], &st) == 0) {
567 if (S_ISDIR(st.st_mode)) {
569 dname = argv[i]; /* only used if 1 dir */
576 while (first != 'n' && first != 'N' && first != 'y' && first != 'Y') {
577 if (dcount && rflag) {
578 fprintf(stderr, "recursively remove");
580 fprintf(stderr, " %s", dname);
582 fprintf(stderr, " %d dirs", dcount);
584 fprintf(stderr, " and 1 file");
586 fprintf(stderr, " and %d files", fcount);
587 } else if (dcount + fcount > 3) {
588 fprintf(stderr, "remove %d files", dcount + fcount);
592 fprintf(stderr, "? ");
595 first = ch = getchar();
596 while (ch != '\n' && ch != EOF)
601 return (first == 'y' || first == 'Y');
604 #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
606 checkdot(char **argv)
608 char *p, **save, **t;
612 for (t = argv; *t;) {
613 if ((p = strrchr(*t, '/')) != NULL)
619 warnx("\".\" and \"..\" may not be removed");
621 for (save = t; (t[0] = t[1]) != NULL; ++t)
633 (void)fprintf(stderr, "%s\n%s\n",
634 "usage: rm [-f | -i] [-dIPRrvWx] file ...",
640 siginfo(int sig __unused)