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 1.11 2005/01/05 16:24:19 liamfoy Exp $
40 #include <sys/param.h>
41 #include <sys/mount.h>
53 int dflag, eval, fflag, iflag, Pflag, vflag, Wflag, stdin_ok;
57 static int check(const char *, const char *, struct stat *);
58 static int check2(char **);
59 static void checkdot(char **);
60 static void rm_file(char **);
61 static int rm_overwrite(const char *, struct stat *);
62 static void rm_tree(char **);
63 static void usage(void);
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)) == NULL) {
186 if (fflag && errno == ENOENT)
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 * Assume that since fts_read() couldn't stat
204 * the file, it can't be unlinked.
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 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 * Assume that since fts_read() couldn't stat
276 * the file, it can't be unlinked.
283 if (!rm_overwrite(p->fts_accpath, NULL))
285 rval = unlink(p->fts_accpath);
286 if (rval == 0 || (fflag && errno == ENOENT)) {
287 if (rval == 0 && vflag)
295 warn("%s", p->fts_path);
310 * Remove a file. POSIX 1003.2 states that, by default, attempting
311 * to remove a directory is an error, so must always stat the file.
313 while ((f = *argv++) != NULL) {
314 /* Assume if can't stat the file, can't unlink it. */
317 sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR;
319 if (!fflag || errno != ENOENT) {
326 warnx("%s: %s", f, strerror(EEXIST));
331 if (S_ISDIR(sb.st_mode) && !dflag) {
332 warnx("%s: is a directory", f);
336 if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb))
340 (sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
341 !(sb.st_flags & (SF_APPEND|SF_IMMUTABLE)))
342 rval = chflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE));
344 if (S_ISWHT(sb.st_mode))
346 else if (S_ISDIR(sb.st_mode))
350 if (!rm_overwrite(f, &sb))
355 if (rval && (!fflag || errno != ENOENT)) {
359 if (vflag && rval == 0)
366 * Overwrite the file 3 times with varying bit patterns.
369 * This is a cheap way to *really* delete files. Note that only regular
370 * files are deleted, directories (and therefore names) will remain.
371 * Also, this assumes a fixed-block filesystem (like FFS, or a V7 or a
372 * System V filesystem). In a logging filesystem, you'll have to have
376 rm_overwrite(const char *file, struct stat *sbp)
386 if (lstat(file, &sb))
390 if (!S_ISREG(sbp->st_mode)) {
391 warnx("%s: cannot overwrite a non-regular file", file);
394 if ((fd = open(file, O_WRONLY, 0)) == -1)
396 if (fstatfs(fd, &fsb) == -1)
398 bsize = MAX(fsb.f_iosize, 1024);
399 if ((buf = malloc(bsize)) == NULL)
400 err(1, "%s malloc failed", file);
402 #define PASS(byte) { \
403 memset(buf, byte, bsize); \
404 for (len = sbp->st_size; len > 0; len -= wlen) { \
405 wlen = len < bsize ? len : bsize; \
406 if (write(fd, buf, wlen) != wlen) \
411 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
414 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
417 if (!fsync(fd) && !close(fd)) {
433 check(const char *path, const char *name, struct stat *sp)
436 char modep[15], *flagsp;
438 /* Check -i first. */
440 fprintf(stderr, "remove %s? ", path);
443 * If it's not a symbolic link and it's unwritable and we're
444 * talking to a terminal, ask. Symbolic links are excluded
445 * because their permissions are meaningless. Check stdin_ok
446 * first because we may not have stat'ed the file.
447 * Also skip this check if the -P option was specified because
448 * we will not be able to overwrite file contents and will
451 if (!stdin_ok || S_ISLNK(sp->st_mode) || Pflag ||
452 (!access(name, W_OK) &&
453 !(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
454 (!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !uid)))
456 strmode(sp->st_mode, modep);
457 if ((flagsp = fflagstostr(sp->st_flags)) == NULL)
459 fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ",
460 modep + 1, modep[9] == ' ' ? "" : " ",
461 user_from_uid(sp->st_uid, 0),
462 group_from_gid(sp->st_gid, 0),
463 *flagsp ? flagsp : "", *flagsp ? " " : "",
469 first = ch = getchar();
470 while (ch != '\n' && ch != EOF)
472 return (first == 'y' || first == 'Y');
484 const char *dname = NULL;
486 for (i = 0; argv[i]; ++i) {
487 if (lstat(argv[i], &st) == 0) {
488 if (S_ISDIR(st.st_mode)) {
490 dname = argv[i]; /* only used if 1 dir */
497 while (first != 'n' && first != 'N' && first != 'y' && first != 'Y') {
498 if (dcount && rflag) {
499 fprintf(stderr, "recursively remove");
501 fprintf(stderr, " %s", dname);
503 fprintf(stderr, " %d dirs", dcount);
505 fprintf(stderr, " and 1 file");
507 fprintf(stderr, " and %d files", fcount);
508 } else if (dcount + fcount > 3) {
509 fprintf(stderr, "remove %d files", dcount + fcount);
513 fprintf(stderr, "? ");
516 first = ch = getchar();
517 while (ch != '\n' && ch != EOF)
522 return (first == 'y' || first == 'Y');
525 #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
527 checkdot(char **argv)
529 char *p, **save, **t;
533 for (t = argv; *t;) {
534 if ((p = strrchr(*t, '/')) != NULL)
540 warnx("\".\" and \"..\" may not be removed");
542 for (save = t; (t[0] = t[1]) != NULL; ++t)
554 fprintf(stderr, "%s\n%s\n",
555 "usage: rm [-f | -i] [-dIPRrvW] file ...",