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. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1990, 1993, 1994 The Regents of the University of California. All rights reserved.
34 * @(#)rm.c 8.5 (Berkeley) 4/18/94
35 * $FreeBSD: src/bin/rm/rm.c,v 1.29.2.5 2002/07/12 07:25:48 tjr Exp $
36 * $DragonFly: src/bin/rm/rm.c,v 1.8 2004/10/18 17:38:52 dillon Exp $
40 #include <sys/param.h>
41 #include <sys/mount.h>
53 int dflag, eval, fflag, iflag, Pflag, vflag, Wflag, stdin_ok;
57 int check(char *, char *, struct stat *);
59 void checkdot(char **);
60 void rm_file(char **);
61 void rm_overwrite(char *, struct stat *);
62 void rm_tree(char **);
67 * This rm is different from historic rm's, but is expected to match
68 * POSIX 1003.2 behavior. The most visible difference is that -f
69 * has two specific effects now, ignore non-existent files and force
73 main(int argc, char *argv[])
79 * Test for the special case where the utility is called as
80 * "unlink", for which the functionality provided is greatly
83 if ((p = strrchr(argv[0], '/')) == NULL)
87 if (strcmp(p, "unlink") == 0) {
88 while (getopt(argc, argv, "") != -1)
99 while ((ch = getopt(argc, argv, "dfiIPRrvW")) != -1)
119 case 'r': /* Compatibility. */
144 stdin_ok = isatty(STDIN_FILENO);
147 if (check2(argv) == 0)
169 * Remove a file hierarchy. If forcing removal (-f), or interactive
170 * (-i) or can't ask anyway (stdin_ok), don't stat the file.
172 needstat = !uid || (!fflag && !iflag && stdin_ok);
175 * If the -i option is specified, the user can skip on the pre-order
176 * visit. The fts_number field flags skipped directories.
180 flags = FTS_PHYSICAL;
184 flags |= FTS_WHITEOUT;
185 if (!(fts = fts_open(argv, flags, NULL)))
187 while ((p = fts_read(fts)) != NULL) {
188 switch (p->fts_info) {
190 if (!fflag || p->fts_errno != ENOENT) {
192 p->fts_path, strerror(p->fts_errno));
197 errx(1, "%s: %s", p->fts_path, strerror(p->fts_errno));
200 * FTS_NS: assume that if can't stat the file, it
205 if (!fflag || p->fts_errno != ENOENT) {
207 p->fts_path, strerror(p->fts_errno));
212 /* Pre-order: give user chance to skip. */
213 if (!fflag && !check(p->fts_path, p->fts_accpath,
215 (void)fts_set(fts, p, FTS_SKIP);
216 p->fts_number = SKIPPED;
219 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
220 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
221 chflags(p->fts_accpath,
222 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)) < 0)
226 /* Post-order: see if user skipped. */
227 if (p->fts_number == SKIPPED)
232 !check(p->fts_path, p->fts_accpath, p->fts_statp))
238 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
239 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)))
240 rval = chflags(p->fts_accpath,
241 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE));
244 * If we can't read or search the directory, may still be
245 * able to remove it. Don't print out the un{read,search}able
246 * message unless the remove fails.
248 switch (p->fts_info) {
251 rval = rmdir(p->fts_accpath);
252 if (rval == 0 || (fflag && errno == ENOENT)) {
253 if (rval == 0 && vflag)
261 rval = undelete(p->fts_accpath);
262 if (rval == 0 && (fflag && errno == ENOENT)) {
272 rm_overwrite(p->fts_accpath, NULL);
273 rval = unlink(p->fts_accpath);
274 if (rval == 0 || (fflag && errno == ENOENT)) {
275 if (rval == 0 && vflag)
283 warn("%s", p->fts_path);
298 * Remove a file. POSIX 1003.2 states that, by default, attempting
299 * to remove a directory is an error, so must always stat the file.
301 while ((f = *argv++) != NULL) {
302 /* Assume if can't stat the file, can't unlink it. */
305 sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR;
307 if (!fflag || errno != ENOENT) {
314 warnx("%s: %s", f, strerror(EEXIST));
319 if (S_ISDIR(sb.st_mode) && !dflag) {
320 warnx("%s: is a directory", f);
324 if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb))
328 (sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
329 !(sb.st_flags & (SF_APPEND|SF_IMMUTABLE)))
330 rval = chflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE));
332 if (S_ISWHT(sb.st_mode))
334 else if (S_ISDIR(sb.st_mode))
338 rm_overwrite(f, &sb);
342 if (rval && (!fflag || errno != ENOENT)) {
346 if (vflag && rval == 0)
347 (void)printf("%s\n", f);
353 * Overwrite the file 3 times with varying bit patterns.
356 * This is a cheap way to *really* delete files. Note that only regular
357 * files are deleted, directories (and therefore names) will remain.
358 * Also, this assumes a fixed-block filesystem (like FFS, or a V7 or a
359 * System V filesystem). In a logging filesystem, you'll have to have
363 rm_overwrite(char *file, struct stat *sbp)
373 if (lstat(file, &sb))
377 if (!S_ISREG(sbp->st_mode))
379 if ((fd = open(file, O_WRONLY, 0)) == -1)
381 if (fstatfs(fd, &fsb) == -1)
383 bsize = MAX(fsb.f_iosize, 1024);
384 if ((buf = malloc(bsize)) == NULL)
387 #define PASS(byte) { \
388 memset(buf, byte, bsize); \
389 for (len = sbp->st_size; len > 0; len -= wlen) { \
390 wlen = len < bsize ? len : bsize; \
391 if (write(fd, buf, wlen) != wlen) \
396 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
399 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
402 if (!fsync(fd) && !close(fd)) {
415 check(char *path, char *name, struct stat *sp)
418 char modep[15], *flagsp;
420 /* Check -i first. */
422 (void)fprintf(stderr, "remove %s? ", path);
425 * If it's not a symbolic link and it's unwritable and we're
426 * talking to a terminal, ask. Symbolic links are excluded
427 * because their permissions are meaningless. Check stdin_ok
428 * first because we may not have stat'ed the file.
430 if (!stdin_ok || S_ISLNK(sp->st_mode) ||
431 (!access(name, W_OK) &&
432 !(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
433 (!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !uid)))
435 strmode(sp->st_mode, modep);
436 if ((flagsp = fflagstostr(sp->st_flags)) == NULL)
438 (void)fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ",
439 modep + 1, modep[9] == ' ' ? "" : " ",
440 user_from_uid(sp->st_uid, 0),
441 group_from_gid(sp->st_gid, 0),
442 *flagsp ? flagsp : "", *flagsp ? " " : "",
446 (void)fflush(stderr);
448 first = ch = getchar();
449 while (ch != '\n' && ch != EOF)
451 return (first == 'y' || first == 'Y');
463 const char *dname = NULL;
465 for (i = 0; argv[i]; ++i) {
466 if (lstat(argv[i], &st) == 0) {
467 if (S_ISDIR(st.st_mode)) {
469 dname = argv[i]; /* only used if 1 dir */
476 while (first != 'n' && first != 'N' && first != 'y' && first != 'Y') {
477 if (dcount && rflag) {
478 fprintf(stderr, "recursively remove");
480 fprintf(stderr, " %s", dname);
482 fprintf(stderr, " %d dirs", dcount);
484 fprintf(stderr, " and 1 file");
486 fprintf(stderr, " and %d files", fcount);
487 } else if (dcount + fcount > 3) {
488 fprintf(stderr, "remove %d files", dcount + fcount);
492 fprintf(stderr, "? ");
495 first = ch = getchar();
496 while (ch != '\n' && ch != EOF)
501 return (first == 'y' || first == 'Y');
504 #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
506 checkdot(char **argv)
508 char *p, **save, **t;
512 for (t = argv; *t;) {
513 if ((p = strrchr(*t, '/')) != NULL)
519 warnx("\".\" and \"..\" may not be removed");
521 for (save = t; (t[0] = t[1]) != NULL; ++t)
533 (void)fprintf(stderr, "%s\n%s\n",
534 "usage: rm [-f | -i] [-dIPRrvW] file ...",