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>
60 int dflag, eval, fflag, iflag, Pflag, vflag, Wflag, stdin_ok;
63 volatile sig_atomic_t info;
65 int check(char *, char *, struct stat *);
67 void checkdot(char **);
68 void checkslash(char **);
69 void rm_file(char **);
70 int rm_overwrite(char *, struct stat *);
71 void rm_tree(char **);
72 static void siginfo(int __unused);
77 * This rm is different from historic rm's, but is expected to match
78 * POSIX 1003.2 behavior. The most visible difference is that -f
79 * has two specific effects now, ignore non-existent files and force
83 main(int argc, char *argv[])
89 * Test for the special case where the utility is called as
90 * "unlink", for which the functionality provided is greatly
93 if ((p = strrchr(argv[0], '/')) == NULL)
97 if (strcmp(p, "unlink") == 0) {
98 while (getopt(argc, argv, "") != -1)
109 while ((ch = getopt(argc, argv, "dfiIPRrvW")) != -1)
129 case 'r': /* Compatibility. */
151 if (getenv("POSIXLY_CORRECT") == NULL)
155 (void)signal(SIGINFO, siginfo);
157 stdin_ok = isatty(STDIN_FILENO);
160 if (check2(argv) == 0)
182 * Remove a file hierarchy. If forcing removal (-f), or interactive
183 * (-i) or can't ask anyway (stdin_ok), don't stat the file.
185 needstat = !uid || (!fflag && !iflag && stdin_ok);
188 * If the -i option is specified, the user can skip on the pre-order
189 * visit. The fts_number field flags skipped directories.
193 flags = FTS_PHYSICAL;
197 flags |= FTS_WHITEOUT;
198 if (!(fts = fts_open(argv, flags, NULL))) {
199 if (fflag && errno == ENOENT)
203 while ((p = fts_read(fts)) != NULL) {
204 switch (p->fts_info) {
206 if (!fflag || p->fts_errno != ENOENT) {
208 p->fts_path, strerror(p->fts_errno));
213 errx(1, "%s: %s", p->fts_path, strerror(p->fts_errno));
216 * Assume that since fts_read() couldn't stat the
217 * file, it can't be unlinked.
221 if (!fflag || p->fts_errno != ENOENT) {
223 p->fts_path, strerror(p->fts_errno));
228 /* Pre-order: give user chance to skip. */
229 if (!fflag && !check(p->fts_path, p->fts_accpath,
231 (void)fts_set(fts, p, FTS_SKIP);
232 p->fts_number = SKIPPED;
235 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
236 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
237 lchflags(p->fts_accpath,
238 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)) < 0)
242 /* Post-order: see if user skipped. */
243 if (p->fts_number == SKIPPED)
248 !check(p->fts_path, p->fts_accpath, p->fts_statp))
254 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
255 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)))
256 rval = lchflags(p->fts_accpath,
257 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE));
260 * If we can't read or search the directory, may still be
261 * able to remove it. Don't print out the un{read,search}able
262 * message unless the remove fails.
264 switch (p->fts_info) {
267 rval = rmdir(p->fts_accpath);
268 if (rval == 0 || (fflag && errno == ENOENT)) {
269 if (rval == 0 && vflag)
272 if (rval == 0 && info) {
282 rval = undelete(p->fts_accpath);
283 if (rval == 0 && (fflag && errno == ENOENT)) {
298 * Assume that since fts_read() couldn't stat
299 * the file, it can't be unlinked.
308 if (!rm_overwrite(p->fts_accpath, p->fts_info ==
309 FTS_NSOK ? NULL : p->fts_statp))
314 rval = unlink(p->fts_accpath);
315 if (rval == 0 || (fflag && errno == ENOENT)) {
316 if (rval == 0 && vflag)
319 if (rval == 0 && info) {
329 warn("%s", p->fts_path);
345 * Remove a file. POSIX 1003.2 states that, by default, attempting
346 * to remove a directory is an error, so must always stat the file.
348 while ((f = *argv++) != NULL) {
349 /* Assume if can't stat the file, can't unlink it. */
352 sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR;
354 if (!fflag || errno != ENOENT) {
361 warnx("%s: %s", f, strerror(EEXIST));
366 if (S_ISDIR(sb.st_mode) && !dflag) {
367 warnx("%s: is a directory", f);
371 if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb))
374 if (!uid && !S_ISWHT(sb.st_mode) &&
375 (sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
376 !(sb.st_flags & (SF_APPEND|SF_IMMUTABLE)))
377 rval = lchflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE));
379 if (S_ISWHT(sb.st_mode))
381 else if (S_ISDIR(sb.st_mode))
385 if (!rm_overwrite(f, &sb))
390 if (rval && (!fflag || errno != ENOENT)) {
394 if (vflag && rval == 0)
395 (void)printf("%s\n", f);
396 if (info && rval == 0) {
398 (void)printf("%s\n", f);
405 * Overwrite the file 3 times with varying bit patterns.
408 * This is a cheap way to *really* delete files. Note that only regular
409 * files are deleted, directories (and therefore names) will remain.
410 * Also, this assumes a fixed-block file system (like FFS, or a V7 or a
411 * System V file system). In a logging or COW file system, you'll have to
412 * have kernel support.
415 rm_overwrite(char *file, struct stat *sbp)
425 if (lstat(file, &sb))
429 if (!S_ISREG(sbp->st_mode))
431 if (sbp->st_nlink > 1 && !fflag) {
432 warnx("%s (inode %u): not overwritten due to multiple links",
436 if ((fd = open(file, O_WRONLY|O_NONBLOCK|O_NOFOLLOW, 0)) == -1)
440 if (sb2.st_dev != sbp->st_dev || sb2.st_ino != sbp->st_ino ||
441 !S_ISREG(sb2.st_mode)) {
445 if (fstatfs(fd, &fsb) == -1)
447 bsize = MAX(fsb.f_iosize, 1024);
448 if ((buf = malloc(bsize)) == NULL)
449 err(1, "%s: malloc", file);
451 #define PASS(byte) { \
452 memset(buf, byte, bsize); \
453 for (len = sbp->st_size; len > 0; len -= wlen) { \
454 wlen = len < bsize ? len : bsize; \
455 if (write(fd, buf, wlen) != wlen) \
460 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
463 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
466 if (!fsync(fd) && !close(fd)) {
482 check(char *path, char *name, struct stat *sp)
485 char modep[15], *flagsp;
487 /* Check -i first. */
489 (void)fprintf(stderr, "remove %s? ", path);
492 * If it's not a symbolic link and it's unwritable and we're
493 * talking to a terminal, ask. Symbolic links are excluded
494 * because their permissions are meaningless. Check stdin_ok
495 * first because we may not have stat'ed the file.
497 if (!stdin_ok || S_ISLNK(sp->st_mode) ||
498 (!access(name, W_OK) &&
499 !(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
500 (!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !uid)))
502 strmode(sp->st_mode, modep);
503 if ((flagsp = fflagstostr(sp->st_flags)) == NULL)
504 err(1, "fflagstostr");
507 "%s: -P was specified, but file is not writable",
509 (void)fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ",
510 modep + 1, modep[9] == ' ' ? "" : " ",
511 user_from_uid(sp->st_uid, 0),
512 group_from_gid(sp->st_gid, 0),
513 *flagsp ? flagsp : "", *flagsp ? " " : "",
517 (void)fflush(stderr);
519 first = ch = getchar();
520 while (ch != '\n' && ch != EOF)
522 return (first == 'y' || first == 'Y');
525 #define ISSLASH(a) ((a)[0] == '/' && (a)[1] == '\0')
527 checkslash(char **argv)
533 for (t = argv; *t;) {
536 warnx("\"/\" may not be removed");
538 for (u = t; u[0] != NULL; ++u)
555 const char *dname = NULL;
557 for (i = 0; argv[i]; ++i) {
558 if (lstat(argv[i], &st) == 0) {
559 if (S_ISDIR(st.st_mode)) {
561 dname = argv[i]; /* only used if 1 dir */
568 while (first != 'n' && first != 'N' && first != 'y' && first != 'Y') {
569 if (dcount && rflag) {
570 fprintf(stderr, "recursively remove");
572 fprintf(stderr, " %s", dname);
574 fprintf(stderr, " %d dirs", dcount);
576 fprintf(stderr, " and 1 file");
578 fprintf(stderr, " and %d files", fcount);
579 } else if (dcount + fcount > 3) {
580 fprintf(stderr, "remove %d files", dcount + fcount);
584 fprintf(stderr, "? ");
587 first = ch = getchar();
588 while (ch != '\n' && ch != EOF)
593 return (first == 'y' || first == 'Y');
596 #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
598 checkdot(char **argv)
600 char *p, **save, **t;
604 for (t = argv; *t;) {
605 if ((p = strrchr(*t, '/')) != NULL)
611 warnx("\".\" and \"..\" may not be removed");
613 for (save = t; (t[0] = t[1]) != NULL; ++t)
625 (void)fprintf(stderr, "%s\n%s\n",
626 "usage: rm [-f | -i] [-dIPRrvW] file ...",
632 siginfo(int sig __unused)