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
35 static const char copyright[] =
36 "@(#) Copyright (c) 1990, 1993, 1994\n\
37 The Regents of the University of California. All rights reserved.\n";
42 static char sccsid[] = "@(#)rm.c 8.5 (Berkeley) 4/18/94";
44 static const char rcsid[] =
50 #include <sys/param.h>
51 #include <sys/mount.h>
65 int dflag, eval, fflag, iflag, Pflag, vflag, Wflag, stdin_ok;
68 int check(char *, char *, struct stat *);
69 void checkdot(char **);
70 void rm_file(char **);
71 void rm_overwrite(char *, struct stat *);
72 void rm_tree(char **);
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 = rindex(argv[0], '/')) == NULL)
97 if (strcmp(p, "unlink") == 0) {
98 while (getopt(argc, argv, "") != -1)
109 while ((ch = getopt(argc, argv, "dfiPRrvW")) != -1)
126 case 'r': /* Compatibility. */
151 stdin_ok = isatty(STDIN_FILENO);
172 * Remove a file hierarchy. If forcing removal (-f), or interactive
173 * (-i) or can't ask anyway (stdin_ok), don't stat the file.
175 needstat = !uid || (!fflag && !iflag && stdin_ok);
178 * If the -i option is specified, the user can skip on the pre-order
179 * visit. The fts_number field flags skipped directories.
183 flags = FTS_PHYSICAL;
187 flags |= FTS_WHITEOUT;
188 if (!(fts = fts_open(argv, flags, NULL)))
190 while ((p = fts_read(fts)) != NULL) {
191 switch (p->fts_info) {
193 if (!fflag || p->fts_errno != ENOENT) {
195 p->fts_path, strerror(p->fts_errno));
200 errx(1, "%s: %s", p->fts_path, strerror(p->fts_errno));
203 * FTS_NS: assume that if can't stat the file, it
208 if (!fflag || p->fts_errno != ENOENT) {
210 p->fts_path, strerror(p->fts_errno));
215 /* Pre-order: give user chance to skip. */
216 if (!fflag && !check(p->fts_path, p->fts_accpath,
218 (void)fts_set(fts, p, FTS_SKIP);
219 p->fts_number = SKIPPED;
222 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
223 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
224 chflags(p->fts_accpath,
225 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)) < 0)
229 /* Post-order: see if user skipped. */
230 if (p->fts_number == SKIPPED)
235 !check(p->fts_path, p->fts_accpath, p->fts_statp))
241 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
242 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)))
243 rval = chflags(p->fts_accpath,
244 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE));
247 * If we can't read or search the directory, may still be
248 * able to remove it. Don't print out the un{read,search}able
249 * message unless the remove fails.
251 switch (p->fts_info) {
254 rval = rmdir(p->fts_accpath);
255 if (rval == 0 || (fflag && errno == ENOENT)) {
256 if (rval == 0 && vflag)
264 rval = undelete(p->fts_accpath);
265 if (rval == 0 && (fflag && errno == ENOENT)) {
275 rm_overwrite(p->fts_accpath, NULL);
276 rval = unlink(p->fts_accpath);
277 if (rval == 0 || (fflag && errno == ENOENT)) {
278 if (rval == 0 && vflag)
286 warn("%s", p->fts_path);
301 * Remove a file. POSIX 1003.2 states that, by default, attempting
302 * to remove a directory is an error, so must always stat the file.
304 while ((f = *argv++) != NULL) {
305 /* Assume if can't stat the file, can't unlink it. */
308 sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR;
310 if (!fflag || errno != ENOENT) {
317 warnx("%s: %s", f, strerror(EEXIST));
322 if (S_ISDIR(sb.st_mode) && !dflag) {
323 warnx("%s: is a directory", f);
327 if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb))
331 (sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
332 !(sb.st_flags & (SF_APPEND|SF_IMMUTABLE)))
333 rval = chflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE));
335 if (S_ISWHT(sb.st_mode))
337 else if (S_ISDIR(sb.st_mode))
341 rm_overwrite(f, &sb);
345 if (rval && (!fflag || errno != ENOENT)) {
349 if (vflag && rval == 0)
350 (void)printf("%s\n", f);
356 * Overwrite the file 3 times with varying bit patterns.
359 * This is a cheap way to *really* delete files. Note that only regular
360 * files are deleted, directories (and therefore names) will remain.
361 * Also, this assumes a fixed-block filesystem (like FFS, or a V7 or a
362 * System V filesystem). In a logging filesystem, you'll have to have
366 rm_overwrite(char *file, struct stat *sbp)
376 if (lstat(file, &sb))
380 if (!S_ISREG(sbp->st_mode))
382 if ((fd = open(file, O_WRONLY, 0)) == -1)
384 if (fstatfs(fd, &fsb) == -1)
386 bsize = MAX(fsb.f_iosize, 1024);
387 if ((buf = malloc(bsize)) == NULL)
390 #define PASS(byte) { \
391 memset(buf, byte, bsize); \
392 for (len = sbp->st_size; len > 0; len -= wlen) { \
393 wlen = len < bsize ? len : bsize; \
394 if (write(fd, buf, wlen) != wlen) \
399 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
402 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
405 if (!fsync(fd) && !close(fd)) {
418 check(char *path, char *name, struct stat *sp)
421 char modep[15], *flagsp;
423 /* Check -i first. */
425 (void)fprintf(stderr, "remove %s? ", path);
428 * If it's not a symbolic link and it's unwritable and we're
429 * talking to a terminal, ask. Symbolic links are excluded
430 * because their permissions are meaningless. Check stdin_ok
431 * first because we may not have stat'ed the file.
433 if (!stdin_ok || S_ISLNK(sp->st_mode) ||
434 (!access(name, W_OK) &&
435 !(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
436 (!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !uid)))
438 strmode(sp->st_mode, modep);
439 if ((flagsp = fflagstostr(sp->st_flags)) == NULL)
441 (void)fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ",
442 modep + 1, modep[9] == ' ' ? "" : " ",
443 user_from_uid(sp->st_uid, 0),
444 group_from_gid(sp->st_gid, 0),
445 *flagsp ? flagsp : "", *flagsp ? " " : "",
449 (void)fflush(stderr);
451 first = ch = getchar();
452 while (ch != '\n' && ch != EOF)
454 return (first == 'y' || first == 'Y');
457 #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
459 checkdot(char **argv)
461 char *p, **save, **t;
465 for (t = argv; *t;) {
466 if ((p = strrchr(*t, '/')) != NULL)
472 warnx("\".\" and \"..\" may not be removed");
474 for (save = t; (t[0] = t[1]) != NULL; ++t)
486 (void)fprintf(stderr, "%s\n%s\n",
487 "usage: rm [-f | -i] [-dPRrvW] file ...",