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 1.14 2005/07/03 00:51:44 corecode Exp $
40 #include <sys/param.h>
41 #include <sys/mount.h>
42 #include <sys/ioctl.h>
54 int dflag, eval, fflag, iflag, Pflag, vflag, Wflag, stdin_ok;
58 static int check(const char *, const char *, struct stat *);
59 static int check2(char **);
60 static void checkdot(char **);
61 static void rm_file(char **);
62 static int rm_overwrite(const char *, struct stat *);
63 static void rm_tree(char **);
64 static void usage(void);
68 * This rm is different from historic rm's, but is expected to match
69 * POSIX 1003.2 behavior. The most visible difference is that -f
70 * has two specific effects now, ignore non-existent files and force
74 main(int argc, char *argv[])
81 * Test for the special case where the utility is called as
82 * "unlink", for which the functionality provided is greatly
85 if ((p = strrchr(argv[0], '/')) == NULL)
89 if (strcmp(p, "unlink") == 0) {
90 while (getopt(argc, argv, "") != -1)
101 while ((ch = getopt(argc, argv, "dfiIPRrvW")) != -1) {
116 * The -I flag is intended to be generally aliasable
117 * in /etc/csh.cshrc. We apply it only to foreground
120 if (ioctl(0, TIOCGPGRP, &tty_pgrp) == 0) {
121 if (tty_pgrp == getpgrp())
129 case 'r': /* Compatibility. */
155 stdin_ok = isatty(STDIN_FILENO);
157 if (Iflag && !iflag) {
158 if (check2(argv) == 0)
180 * Remove a file hierarchy. If forcing removal (-f), or interactive
181 * (-i) or can't ask anyway (stdin_ok), don't stat the file.
183 needstat = !uid || (!fflag && !iflag && stdin_ok);
186 * If the -i option is specified, the user can skip on the pre-order
187 * visit. The fts_number field flags skipped directories.
191 flags = FTS_PHYSICAL;
195 flags |= FTS_WHITEOUT;
196 if ((fts = fts_open(argv, flags, NULL)) == NULL) {
197 if (fflag && errno == ENOENT)
201 while ((p = fts_read(fts)) != NULL) {
202 switch (p->fts_info) {
204 if (!fflag || p->fts_errno != ENOENT) {
206 p->fts_path, strerror(p->fts_errno));
211 errx(1, "%s: %s", p->fts_path, strerror(p->fts_errno));
214 * Assume that since fts_read() couldn't stat
215 * the file, it can't be unlinked.
219 if (!fflag || p->fts_errno != ENOENT) {
221 p->fts_path, strerror(p->fts_errno));
226 /* Pre-order: give user chance to skip. */
227 if (!fflag && !check(p->fts_path, p->fts_accpath,
229 fts_set(fts, p, FTS_SKIP);
230 p->fts_number = SKIPPED;
233 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
234 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
235 chflags(p->fts_accpath,
236 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)) < 0)
240 /* Post-order: see if user skipped. */
241 if (p->fts_number == SKIPPED)
246 !check(p->fts_path, p->fts_accpath, p->fts_statp))
252 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
253 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)))
254 rval = chflags(p->fts_accpath,
255 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE));
258 * If we can't read or search the directory, may still be
259 * able to remove it. Don't print out the un{read,search}able
260 * message unless the remove fails.
262 switch (p->fts_info) {
265 rval = rmdir(p->fts_accpath);
266 if (rval == 0 || (fflag && errno == ENOENT)) {
267 if (rval == 0 && vflag)
275 rval = undelete(p->fts_accpath);
276 if (rval == 0 && (fflag && errno == ENOENT)) {
286 * Assume that since fts_read() couldn't stat
287 * the file, it can't be unlinked.
294 if (!rm_overwrite(p->fts_accpath, NULL))
296 rval = unlink(p->fts_accpath);
297 if (rval == 0 || (fflag && errno == ENOENT)) {
298 if (rval == 0 && vflag)
306 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))
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)
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 filesystem (like FFS, or a V7 or a
383 * System V filesystem). In a logging filesystem, you'll have to have
387 rm_overwrite(const char *file, struct stat *sbp)
397 if (lstat(file, &sb))
401 if (!S_ISREG(sbp->st_mode)) {
402 warnx("%s: cannot overwrite a non-regular file", file);
405 if ((fd = open(file, O_WRONLY, 0)) == -1)
407 if (fstatfs(fd, &fsb) == -1)
409 bsize = MAX(fsb.f_iosize, 1024);
410 if ((buf = malloc(bsize)) == NULL)
411 err(1, "%s malloc failed", file);
413 #define PASS(byte) { \
414 memset(buf, byte, bsize); \
415 for (len = sbp->st_size; len > 0; len -= wlen) { \
416 wlen = len < bsize ? len : bsize; \
417 if (write(fd, buf, wlen) != wlen) \
422 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
425 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
428 if (!fsync(fd) && !close(fd)) {
444 check(const char *path, const char *name, struct stat *sp)
447 char modep[15], *flagsp;
449 /* Check -i first. */
451 fprintf(stderr, "remove %s? ", path);
454 * If it's not a symbolic link and it's unwritable and we're
455 * talking to a terminal, ask. Symbolic links are excluded
456 * because their permissions are meaningless. Check stdin_ok
457 * first because we may not have stat'ed the file.
458 * Also skip this check if the -P option was specified because
459 * we will not be able to overwrite file contents and will
462 if (!stdin_ok || S_ISLNK(sp->st_mode) || Pflag ||
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)
470 fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ",
471 modep + 1, modep[9] == ' ' ? "" : " ",
472 user_from_uid(sp->st_uid, 0),
473 group_from_gid(sp->st_gid, 0),
474 *flagsp ? flagsp : "", *flagsp ? " " : "",
480 first = ch = getchar();
481 while (ch != '\n' && ch != EOF)
483 return (first == 'y' || first == 'Y');
495 const char *dname = NULL;
497 for (i = 0; argv[i]; ++i) {
498 if (lstat(argv[i], &st) == 0) {
499 if (S_ISDIR(st.st_mode)) {
501 dname = argv[i]; /* only used if 1 dir */
508 while (first != 'n' && first != 'N' && first != 'y' && first != 'Y') {
509 if (dcount && rflag) {
510 fprintf(stderr, "recursively remove");
512 fprintf(stderr, " %s", dname);
514 fprintf(stderr, " %d dirs", dcount);
516 fprintf(stderr, " and 1 file");
518 fprintf(stderr, " and %d files", fcount);
519 } else if (dcount + fcount > 3) {
520 fprintf(stderr, "remove %d files", dcount + fcount);
524 fprintf(stderr, "? ");
527 first = ch = getchar();
528 while (ch != '\n' && ch != EOF)
533 return (first == 'y' || first == 'Y');
536 #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
538 checkdot(char **argv)
540 char *p, **save, **t;
544 for (t = argv; *t;) {
545 if ((p = strrchr(*t, '/')) != NULL)
551 warnx("\".\" and \"..\" may not be removed");
553 for (save = t; (t[0] = t[1]) != NULL; ++t)
565 fprintf(stderr, "%s\n%s\n",
566 "usage: rm [-f | -i] [-dIPRrvW] file ...",