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>
61 static int dflag, eval, fflag, iflag, Pflag, vflag, Wflag, stdin_ok;
62 static int rflag, Iflag, xflag;
64 static volatile sig_atomic_t info;
66 static int check(const char *, const char *, struct stat *);
67 static int check2(char **);
68 static void checkdot(char **);
69 static void checkslash(char **);
70 static void rm_file(char **);
71 static int rm_overwrite(const char *, struct stat *);
72 static void rm_tree(char **);
73 static void siginfo(int __unused);
74 static void usage(void);
78 * This rm is different from historic rm's, but is expected to match
79 * POSIX 1003.2 behavior. The most visible difference is that -f
80 * has two specific effects now, ignore non-existent files and force
84 main(int argc, char *argv[])
90 * Test for the special case where the utility is called as
91 * "unlink", for which the functionality provided is greatly
94 if ((p = strrchr(argv[0], '/')) == NULL)
98 if (strcmp(p, "unlink") == 0) {
99 while (getopt(argc, argv, "") != -1)
109 Pflag = rflag = xflag = 0;
110 while ((ch = getopt(argc, argv, "dfiIPRrvWx")) != -1)
130 case 'r': /* Compatibility. */
155 if (getenv("POSIXLY_CORRECT") == NULL)
159 (void)signal(SIGINFO, siginfo);
161 stdin_ok = isatty(STDIN_FILENO);
164 if (check2(argv) == 0)
186 * Remove a file hierarchy. If forcing removal (-f), or interactive
187 * (-i) or can't ask anyway (stdin_ok), don't stat the file.
189 needstat = !uid || (!fflag && !iflag && stdin_ok);
192 * If the -i option is specified, the user can skip on the pre-order
193 * visit. The fts_number field flags skipped directories.
197 flags = FTS_PHYSICAL;
201 flags |= FTS_WHITEOUT;
204 if (!(fts = fts_open(argv, flags, NULL))) {
205 if (fflag && errno == ENOENT)
209 while ((p = fts_read(fts)) != NULL) {
210 switch (p->fts_info) {
212 if (!fflag || p->fts_errno != ENOENT) {
214 p->fts_path, strerror(p->fts_errno));
219 errx(1, "%s: %s", p->fts_path, strerror(p->fts_errno));
222 * Assume that since fts_read() couldn't stat the
223 * file, it can't be unlinked.
227 if (!fflag || p->fts_errno != ENOENT) {
229 p->fts_path, strerror(p->fts_errno));
234 /* Pre-order: give user chance to skip. */
235 if (!fflag && !check(p->fts_path, p->fts_accpath,
237 (void)fts_set(fts, p, FTS_SKIP);
238 p->fts_number = SKIPPED;
241 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
242 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
243 lchflags(p->fts_accpath,
244 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)) < 0)
248 /* Post-order: see if user skipped. */
249 if (p->fts_number == SKIPPED)
254 !check(p->fts_path, p->fts_accpath, p->fts_statp))
260 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
261 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)))
262 rval = lchflags(p->fts_accpath,
263 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE));
266 * If we can't read or search the directory, may still be
267 * able to remove it. Don't print out the un{read,search}able
268 * message unless the remove fails.
270 switch (p->fts_info) {
273 rval = rmdir(p->fts_accpath);
274 if (rval == 0 || (fflag && errno == ENOENT)) {
275 if (rval == 0 && vflag)
278 if (rval == 0 && info) {
288 rval = undelete(p->fts_accpath);
289 if (rval == 0 && (fflag && errno == ENOENT)) {
304 * Assume that since fts_read() couldn't stat
305 * the file, it can't be unlinked.
314 if (!rm_overwrite(p->fts_accpath, p->fts_info ==
315 FTS_NSOK ? NULL : p->fts_statp))
320 rval = unlink(p->fts_accpath);
321 if (rval == 0 || (fflag && errno == ENOENT)) {
322 if (rval == 0 && vflag)
325 if (rval == 0 && info) {
335 warn("%s", p->fts_path);
351 * Remove a file. POSIX 1003.2 states that, by default, attempting
352 * to remove a directory is an error, so must always stat the file.
354 while ((f = *argv++) != NULL) {
355 /* Assume if can't stat the file, can't unlink it. */
358 sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR;
360 if (!fflag || errno != ENOENT) {
367 warnx("%s: %s", f, strerror(EEXIST));
372 if (S_ISDIR(sb.st_mode) && !dflag) {
373 warnx("%s: is a directory", f);
377 if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb))
380 if (!uid && !S_ISWHT(sb.st_mode) &&
381 (sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
382 !(sb.st_flags & (SF_APPEND|SF_IMMUTABLE)))
383 rval = lchflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE));
385 if (S_ISWHT(sb.st_mode))
387 else if (S_ISDIR(sb.st_mode))
391 if (!rm_overwrite(f, &sb))
396 if (rval && (!fflag || errno != ENOENT)) {
400 if (vflag && rval == 0)
401 (void)printf("%s\n", f);
402 if (info && rval == 0) {
404 (void)printf("%s\n", f);
411 * Overwrite the file 3 times with varying bit patterns.
414 * This is a cheap way to *really* delete files. Note that only regular
415 * files are deleted, directories (and therefore names) will remain.
416 * Also, this assumes a fixed-block file system (like FFS, or a V7 or a
417 * System V file system). In a logging or COW file system, you'll have to
418 * have kernel support.
421 rm_overwrite(const char *file, struct stat *sbp)
431 if (lstat(file, &sb))
435 if (!S_ISREG(sbp->st_mode))
437 if (sbp->st_nlink > 1 && !fflag) {
438 warnx("%s (inode %ju): not overwritten due to multiple links",
439 file, (uintmax_t)sbp->st_ino);
442 if ((fd = open(file, O_WRONLY|O_NONBLOCK|O_NOFOLLOW, 0)) == -1)
446 if (sb2.st_dev != sbp->st_dev || sb2.st_ino != sbp->st_ino ||
447 !S_ISREG(sb2.st_mode)) {
451 if (fstatfs(fd, &fsb) == -1)
453 bsize = MAX(fsb.f_iosize, 1024);
454 if ((buf = malloc(bsize)) == NULL)
455 err(1, "%s: malloc", file);
457 #define PASS(byte) { \
458 memset(buf, byte, bsize); \
459 for (len = sbp->st_size; len > 0; len -= wlen) { \
460 wlen = len < bsize ? len : bsize; \
461 if (write(fd, buf, wlen) != wlen) \
466 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
469 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
472 if (!fsync(fd) && !close(fd)) {
488 check(const char *path, const char *name, struct stat *sp)
491 char modep[15], *flagsp;
493 /* Check -i first. */
495 (void)fprintf(stderr, "remove %s? ", path);
498 * If it's not a symbolic link and it's unwritable and we're
499 * talking to a terminal, ask. Symbolic links are excluded
500 * because their permissions are meaningless. Check stdin_ok
501 * first because we may not have stat'ed the file.
503 if (!stdin_ok || S_ISLNK(sp->st_mode) ||
504 (!access(name, W_OK) &&
505 !(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
506 (!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !uid)))
508 strmode(sp->st_mode, modep);
509 if ((flagsp = fflagstostr(sp->st_flags)) == NULL)
510 err(1, "fflagstostr");
513 "%s: -P was specified, but file is not writable",
515 (void)fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ",
516 modep + 1, modep[9] == ' ' ? "" : " ",
517 user_from_uid(sp->st_uid, 0),
518 group_from_gid(sp->st_gid, 0),
519 *flagsp ? flagsp : "", *flagsp ? " " : "",
523 (void)fflush(stderr);
525 first = ch = getchar();
526 while (ch != '\n' && ch != EOF)
528 return (first == 'y' || first == 'Y');
531 #define ISSLASH(a) ((a)[0] == '/' && (a)[1] == '\0')
533 checkslash(char **argv)
539 for (t = argv; *t;) {
542 warnx("\"/\" may not be removed");
544 for (u = t; u[0] != NULL; ++u)
561 const char *dname = NULL;
563 for (i = 0; argv[i]; ++i) {
564 if (lstat(argv[i], &st) == 0) {
565 if (S_ISDIR(st.st_mode)) {
567 dname = argv[i]; /* only used if 1 dir */
574 while (first != 'n' && first != 'N' && first != 'y' && first != 'Y') {
575 if (dcount && rflag) {
576 fprintf(stderr, "recursively remove");
578 fprintf(stderr, " %s", dname);
580 fprintf(stderr, " %d dirs", dcount);
582 fprintf(stderr, " and 1 file");
584 fprintf(stderr, " and %d files", fcount);
585 } else if (dcount + fcount > 3) {
586 fprintf(stderr, "remove %d files", dcount + fcount);
590 fprintf(stderr, "? ");
593 first = ch = getchar();
594 while (ch != '\n' && ch != EOF)
599 return (first == 'y' || first == 'Y');
602 #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
604 checkdot(char **argv)
606 char *p, **save, **t;
610 for (t = argv; *t;) {
611 if ((p = strrchr(*t, '/')) != NULL)
617 warnx("\".\" and \"..\" may not be removed");
619 for (save = t; (t[0] = t[1]) != NULL; ++t)
631 (void)fprintf(stderr, "%s\n%s\n",
632 "usage: rm [-f | -i] [-dIPRrvWx] file ...",
638 siginfo(int sig __unused)