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;
64 int check(char *, char *, struct stat *);
66 void checkdot(char **);
67 void checkslash(char **);
68 void rm_file(char **);
69 int rm_overwrite(char *, struct stat *);
70 void rm_tree(char **);
75 * This rm is different from historic rm's, but is expected to match
76 * POSIX 1003.2 behavior. The most visible difference is that -f
77 * has two specific effects now, ignore non-existent files and force
81 main(int argc, char *argv[])
87 * Test for the special case where the utility is called as
88 * "unlink", for which the functionality provided is greatly
91 if ((p = rindex(argv[0], '/')) == NULL)
95 if (strcmp(p, "unlink") == 0) {
96 while (getopt(argc, argv, "") != -1)
107 while ((ch = getopt(argc, argv, "dfiIPRrvW")) != -1)
127 case 'r': /* Compatibility. */
149 if (getenv("POSIXLY_CORRECT") == NULL)
154 stdin_ok = isatty(STDIN_FILENO);
157 if (check2(argv) == 0)
179 * Remove a file hierarchy. If forcing removal (-f), or interactive
180 * (-i) or can't ask anyway (stdin_ok), don't stat the file.
182 needstat = !uid || (!fflag && !iflag && stdin_ok);
185 * If the -i option is specified, the user can skip on the pre-order
186 * visit. The fts_number field flags skipped directories.
190 flags = FTS_PHYSICAL;
194 flags |= FTS_WHITEOUT;
195 if (!(fts = fts_open(argv, flags, NULL))) {
196 if (fflag && errno == ENOENT)
200 while ((p = fts_read(fts)) != NULL) {
201 switch (p->fts_info) {
203 if (!fflag || p->fts_errno != ENOENT) {
205 p->fts_path, strerror(p->fts_errno));
210 errx(1, "%s: %s", p->fts_path, strerror(p->fts_errno));
213 * Assume that since fts_read() couldn't stat the
214 * file, it can't be unlinked.
218 if (!fflag || p->fts_errno != ENOENT) {
220 p->fts_path, strerror(p->fts_errno));
225 /* Pre-order: give user chance to skip. */
226 if (!fflag && !check(p->fts_path, p->fts_accpath,
228 (void)fts_set(fts, p, FTS_SKIP);
229 p->fts_number = SKIPPED;
232 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
233 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
234 chflags(p->fts_accpath,
235 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)) < 0)
239 /* Post-order: see if user skipped. */
240 if (p->fts_number == SKIPPED)
245 !check(p->fts_path, p->fts_accpath, p->fts_statp))
251 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
252 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)))
253 rval = chflags(p->fts_accpath,
254 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE));
257 * If we can't read or search the directory, may still be
258 * able to remove it. Don't print out the un{read,search}able
259 * message unless the remove fails.
261 switch (p->fts_info) {
264 rval = rmdir(p->fts_accpath);
265 if (rval == 0 || (fflag && errno == ENOENT)) {
266 if (rval == 0 && vflag)
274 rval = undelete(p->fts_accpath);
275 if (rval == 0 && (fflag && errno == ENOENT)) {
285 * Assume that since fts_read() couldn't stat
286 * the file, it can't be unlinked.
293 if (!rm_overwrite(p->fts_accpath, NULL))
295 rval = unlink(p->fts_accpath);
296 if (rval == 0 || (fflag && errno == ENOENT)) {
297 if (rval == 0 && vflag)
305 warn("%s", p->fts_path);
321 * Remove a file. POSIX 1003.2 states that, by default, attempting
322 * to remove a directory is an error, so must always stat the file.
324 while ((f = *argv++) != NULL) {
325 /* Assume if can't stat the file, can't unlink it. */
328 sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR;
330 if (!fflag || errno != ENOENT) {
337 warnx("%s: %s", f, strerror(EEXIST));
342 if (S_ISDIR(sb.st_mode) && !dflag) {
343 warnx("%s: is a directory", f);
347 if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb))
350 if (!uid && !S_ISWHT(sb.st_mode) &&
351 (sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
352 !(sb.st_flags & (SF_APPEND|SF_IMMUTABLE)))
353 rval = chflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE));
355 if (S_ISWHT(sb.st_mode))
357 else if (S_ISDIR(sb.st_mode))
361 if (!rm_overwrite(f, &sb))
366 if (rval && (!fflag || errno != ENOENT)) {
370 if (vflag && rval == 0)
371 (void)printf("%s\n", f);
377 * Overwrite the file 3 times with varying bit patterns.
380 * This is a cheap way to *really* delete files. Note that only regular
381 * files are deleted, directories (and therefore names) will remain.
382 * Also, this assumes a fixed-block file system (like FFS, or a V7 or a
383 * System V file system). In a logging file system, you'll have to have
387 rm_overwrite(char *file, struct stat *sbp)
397 if (lstat(file, &sb))
401 if (!S_ISREG(sbp->st_mode))
403 if (sbp->st_nlink > 1 && !fflag) {
404 warnx("%s (inode %u): not overwritten due to multiple links",
408 if ((fd = open(file, O_WRONLY, 0)) == -1)
410 if (fstatfs(fd, &fsb) == -1)
412 bsize = MAX(fsb.f_iosize, 1024);
413 if ((buf = malloc(bsize)) == NULL)
414 err(1, "%s: malloc", file);
416 #define PASS(byte) { \
417 memset(buf, byte, bsize); \
418 for (len = sbp->st_size; len > 0; len -= wlen) { \
419 wlen = len < bsize ? len : bsize; \
420 if (write(fd, buf, wlen) != wlen) \
425 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
428 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
431 if (!fsync(fd) && !close(fd)) {
447 check(char *path, char *name, struct stat *sp)
450 char modep[15], *flagsp;
452 /* Check -i first. */
454 (void)fprintf(stderr, "remove %s? ", path);
457 * If it's not a symbolic link and it's unwritable and we're
458 * talking to a terminal, ask. Symbolic links are excluded
459 * because their permissions are meaningless. Check stdin_ok
460 * first because we may not have stat'ed the file.
462 if (!stdin_ok || S_ISLNK(sp->st_mode) ||
463 (!access(name, W_OK) &&
464 !(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
465 (!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !uid)))
467 strmode(sp->st_mode, modep);
468 if ((flagsp = fflagstostr(sp->st_flags)) == NULL)
469 err(1, "fflagstostr");
472 "%s: -P was specified, but file is not writable",
474 (void)fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ",
475 modep + 1, modep[9] == ' ' ? "" : " ",
476 user_from_uid(sp->st_uid, 0),
477 group_from_gid(sp->st_gid, 0),
478 *flagsp ? flagsp : "", *flagsp ? " " : "",
482 (void)fflush(stderr);
484 first = ch = getchar();
485 while (ch != '\n' && ch != EOF)
487 return (first == 'y' || first == 'Y');
490 #define ISSLASH(a) ((a)[0] == '/' && (a)[1] == '\0')
492 checkslash(char **argv)
498 for (t = argv; *t;) {
501 warnx("\"/\" may not be removed");
503 for (u = t; u[0] != NULL; ++u)
520 const char *dname = NULL;
522 for (i = 0; argv[i]; ++i) {
523 if (lstat(argv[i], &st) == 0) {
524 if (S_ISDIR(st.st_mode)) {
526 dname = argv[i]; /* only used if 1 dir */
533 while (first != 'n' && first != 'N' && first != 'y' && first != 'Y') {
534 if (dcount && rflag) {
535 fprintf(stderr, "recursively remove");
537 fprintf(stderr, " %s", dname);
539 fprintf(stderr, " %d dirs", dcount);
541 fprintf(stderr, " and 1 file");
543 fprintf(stderr, " and %d files", fcount);
544 } else if (dcount + fcount > 3) {
545 fprintf(stderr, "remove %d files", dcount + fcount);
549 fprintf(stderr, "? ");
552 first = ch = getchar();
553 while (ch != '\n' && ch != EOF)
558 return (first == 'y' || first == 'Y');
561 #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
563 checkdot(char **argv)
565 char *p, **save, **t;
569 for (t = argv; *t;) {
570 if ((p = strrchr(*t, '/')) != NULL)
576 warnx("\".\" and \"..\" may not be removed");
578 for (save = t; (t[0] = t[1]) != NULL; ++t)
590 (void)fprintf(stderr, "%s\n%s\n",
591 "usage: rm [-f | -i] [-dIPRrvW] file ...",