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 1.2 2003/06/17 04:22:50 dillon Exp $
40 #include <sys/param.h>
41 #include <sys/mount.h>
53 int dflag, eval, fflag, iflag, Pflag, vflag, Wflag, stdin_ok;
56 int check(char *, char *, struct stat *);
57 void checkdot(char **);
58 void rm_file(char **);
59 void rm_overwrite(char *, struct stat *);
60 void rm_tree(char **);
65 * This rm is different from historic rm's, but is expected to match
66 * POSIX 1003.2 behavior. The most visible difference is that -f
67 * has two specific effects now, ignore non-existent files and force
71 main(int argc, char *argv[])
77 * Test for the special case where the utility is called as
78 * "unlink", for which the functionality provided is greatly
81 if ((p = rindex(argv[0], '/')) == NULL)
85 if (strcmp(p, "unlink") == 0) {
86 while (getopt(argc, argv, "") != -1)
97 while ((ch = getopt(argc, argv, "dfiPRrvW")) != -1)
114 case 'r': /* Compatibility. */
139 stdin_ok = isatty(STDIN_FILENO);
160 * Remove a file hierarchy. If forcing removal (-f), or interactive
161 * (-i) or can't ask anyway (stdin_ok), don't stat the file.
163 needstat = !uid || (!fflag && !iflag && stdin_ok);
166 * If the -i option is specified, the user can skip on the pre-order
167 * visit. The fts_number field flags skipped directories.
171 flags = FTS_PHYSICAL;
175 flags |= FTS_WHITEOUT;
176 if (!(fts = fts_open(argv, flags, NULL)))
178 while ((p = fts_read(fts)) != NULL) {
179 switch (p->fts_info) {
181 if (!fflag || p->fts_errno != ENOENT) {
183 p->fts_path, strerror(p->fts_errno));
188 errx(1, "%s: %s", p->fts_path, strerror(p->fts_errno));
191 * FTS_NS: assume that if can't stat the file, it
196 if (!fflag || p->fts_errno != ENOENT) {
198 p->fts_path, strerror(p->fts_errno));
203 /* Pre-order: give user chance to skip. */
204 if (!fflag && !check(p->fts_path, p->fts_accpath,
206 (void)fts_set(fts, p, FTS_SKIP);
207 p->fts_number = SKIPPED;
210 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
211 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
212 chflags(p->fts_accpath,
213 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)) < 0)
217 /* Post-order: see if user skipped. */
218 if (p->fts_number == SKIPPED)
223 !check(p->fts_path, p->fts_accpath, p->fts_statp))
229 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
230 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)))
231 rval = chflags(p->fts_accpath,
232 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE));
235 * If we can't read or search the directory, may still be
236 * able to remove it. Don't print out the un{read,search}able
237 * message unless the remove fails.
239 switch (p->fts_info) {
242 rval = rmdir(p->fts_accpath);
243 if (rval == 0 || (fflag && errno == ENOENT)) {
244 if (rval == 0 && vflag)
252 rval = undelete(p->fts_accpath);
253 if (rval == 0 && (fflag && errno == ENOENT)) {
263 rm_overwrite(p->fts_accpath, NULL);
264 rval = unlink(p->fts_accpath);
265 if (rval == 0 || (fflag && errno == ENOENT)) {
266 if (rval == 0 && vflag)
274 warn("%s", p->fts_path);
289 * Remove a file. POSIX 1003.2 states that, by default, attempting
290 * to remove a directory is an error, so must always stat the file.
292 while ((f = *argv++) != NULL) {
293 /* Assume if can't stat the file, can't unlink it. */
296 sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR;
298 if (!fflag || errno != ENOENT) {
305 warnx("%s: %s", f, strerror(EEXIST));
310 if (S_ISDIR(sb.st_mode) && !dflag) {
311 warnx("%s: is a directory", f);
315 if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb))
319 (sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
320 !(sb.st_flags & (SF_APPEND|SF_IMMUTABLE)))
321 rval = chflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE));
323 if (S_ISWHT(sb.st_mode))
325 else if (S_ISDIR(sb.st_mode))
329 rm_overwrite(f, &sb);
333 if (rval && (!fflag || errno != ENOENT)) {
337 if (vflag && rval == 0)
338 (void)printf("%s\n", f);
344 * Overwrite the file 3 times with varying bit patterns.
347 * This is a cheap way to *really* delete files. Note that only regular
348 * files are deleted, directories (and therefore names) will remain.
349 * Also, this assumes a fixed-block filesystem (like FFS, or a V7 or a
350 * System V filesystem). In a logging filesystem, you'll have to have
354 rm_overwrite(char *file, struct stat *sbp)
364 if (lstat(file, &sb))
368 if (!S_ISREG(sbp->st_mode))
370 if ((fd = open(file, O_WRONLY, 0)) == -1)
372 if (fstatfs(fd, &fsb) == -1)
374 bsize = MAX(fsb.f_iosize, 1024);
375 if ((buf = malloc(bsize)) == NULL)
378 #define PASS(byte) { \
379 memset(buf, byte, bsize); \
380 for (len = sbp->st_size; len > 0; len -= wlen) { \
381 wlen = len < bsize ? len : bsize; \
382 if (write(fd, buf, wlen) != wlen) \
387 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
390 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
393 if (!fsync(fd) && !close(fd)) {
406 check(char *path, char *name, struct stat *sp)
409 char modep[15], *flagsp;
411 /* Check -i first. */
413 (void)fprintf(stderr, "remove %s? ", path);
416 * If it's not a symbolic link and it's unwritable and we're
417 * talking to a terminal, ask. Symbolic links are excluded
418 * because their permissions are meaningless. Check stdin_ok
419 * first because we may not have stat'ed the file.
421 if (!stdin_ok || S_ISLNK(sp->st_mode) ||
422 (!access(name, W_OK) &&
423 !(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
424 (!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !uid)))
426 strmode(sp->st_mode, modep);
427 if ((flagsp = fflagstostr(sp->st_flags)) == NULL)
429 (void)fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ",
430 modep + 1, modep[9] == ' ' ? "" : " ",
431 user_from_uid(sp->st_uid, 0),
432 group_from_gid(sp->st_gid, 0),
433 *flagsp ? flagsp : "", *flagsp ? " " : "",
437 (void)fflush(stderr);
439 first = ch = getchar();
440 while (ch != '\n' && ch != EOF)
442 return (first == 'y' || first == 'Y');
445 #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
447 checkdot(char **argv)
449 char *p, **save, **t;
453 for (t = argv; *t;) {
454 if ((p = strrchr(*t, '/')) != NULL)
460 warnx("\".\" and \"..\" may not be removed");
462 for (save = t; (t[0] = t[1]) != NULL; ++t)
474 (void)fprintf(stderr, "%s\n%s\n",
475 "usage: rm [-f | -i] [-dPRrvW] file ...",