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 1.16 2006/06/19 12:08:25 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);
322 * Remove a file. POSIX 1003.2 states that, by default, attempting
323 * to remove a directory is an error, so must always stat the file.
325 while ((f = *argv++) != NULL) {
326 /* Assume if can't stat the file, can't unlink it. */
329 sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR;
331 if (!fflag || errno != ENOENT) {
338 warnx("%s: %s", f, strerror(EEXIST));
343 if (S_ISDIR(sb.st_mode) && !dflag) {
344 warnx("%s: is a directory", f);
348 if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb))
352 (sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
353 !(sb.st_flags & (SF_APPEND|SF_IMMUTABLE)))
354 rval = chflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE));
356 if (S_ISWHT(sb.st_mode))
358 else if (S_ISDIR(sb.st_mode))
362 if (!rm_overwrite(f, &sb))
367 if (rval && (!fflag || errno != ENOENT)) {
371 if (vflag && rval == 0)
378 * Overwrite the file 3 times with varying bit patterns.
381 * This is a cheap way to *really* delete files. Note that only regular
382 * files are deleted, directories (and therefore names) will remain.
383 * Also, this assumes a fixed-block filesystem (like FFS, or a V7 or a
384 * System V filesystem). In a logging filesystem, you'll have to have
388 rm_overwrite(const char *file, struct stat *sbp)
398 if (lstat(file, &sb))
402 if (!S_ISREG(sbp->st_mode)) {
403 warnx("%s: cannot overwrite a non-regular file", file);
406 if ((fd = open(file, O_WRONLY, 0)) == -1)
408 if (fstatfs(fd, &fsb) == -1)
410 bsize = MAX(fsb.f_iosize, 1024);
411 if ((buf = malloc(bsize)) == NULL)
412 err(1, "%s malloc failed", file);
414 #define PASS(byte) { \
415 memset(buf, byte, bsize); \
416 for (len = sbp->st_size; len > 0; len -= wlen) { \
417 wlen = len < bsize ? len : bsize; \
418 if (write(fd, buf, wlen) != wlen) \
423 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
426 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
429 if (!fsync(fd) && !close(fd)) {
445 check(const char *path, const char *name, struct stat *sp)
447 static int perm_answer = -1;
453 } *choice, choices[] = {
454 { 'y', "yes" , 1, 0 },
455 { 'n', "no" , 0, 0 },
456 { 'a', "always", 1, 1 },
457 { 'v', "never" , 0, 1 },
460 char modep[15], *flagsp;
462 if (perm_answer != -1)
463 return (perm_answer);
465 /* Check -i first. */
467 fprintf(stderr, "remove %s? ", path);
470 * If it's not a symbolic link and it's unwritable and we're
471 * talking to a terminal, ask. Symbolic links are excluded
472 * because their permissions are meaningless. Check stdin_ok
473 * first because we may not have stat'ed the file.
474 * Also skip this check if the -P option was specified because
475 * we will not be able to overwrite file contents and will
478 if (!stdin_ok || S_ISLNK(sp->st_mode) || Pflag ||
479 (!access(name, W_OK) &&
480 !(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
481 (!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !uid)))
483 strmode(sp->st_mode, modep);
484 if ((flagsp = fflagstostr(sp->st_flags)) == NULL)
486 fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ",
487 modep + 1, modep[9] == ' ' ? "" : " ",
488 user_from_uid(sp->st_uid, 0),
489 group_from_gid(sp->st_gid, 0),
490 *flagsp ? flagsp : "", *flagsp ? " " : "",
500 answer = fgetln(stdin, &len);
501 /* clearerr(stdin); */
504 if (answer[len - 1] == '\n')
509 for (choice = choices; choice->str != NULL; choice++) {
510 if (len == 1 && choice->ch == answer[0])
512 if (strncasecmp(answer, choice->str, len) == 0)
516 fprintf(stderr, "invalid answer, try again (y/n/a/v): ");
521 perm_answer = choice->res;
522 return (choice->res);
534 const char *dname = NULL;
536 for (i = 0; argv[i]; ++i) {
537 if (lstat(argv[i], &st) == 0) {
538 if (S_ISDIR(st.st_mode)) {
540 dname = argv[i]; /* only used if 1 dir */
547 while (first != 'n' && first != 'N' && first != 'y' && first != 'Y') {
548 if (dcount && rflag) {
549 fprintf(stderr, "recursively remove");
551 fprintf(stderr, " %s", dname);
553 fprintf(stderr, " %d dirs", dcount);
555 fprintf(stderr, " and 1 file");
557 fprintf(stderr, " and %d files", fcount);
558 } else if (dcount + fcount > 3) {
559 fprintf(stderr, "remove %d files", dcount + fcount);
563 fprintf(stderr, "? ");
566 first = ch = getchar();
567 while (ch != '\n' && ch != EOF)
572 return (first == 'y' || first == 'Y');
575 #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
577 checkdot(char **argv)
579 char *p, **save, **t;
583 for (t = argv; *t;) {
584 if ((p = strrchr(*t, '/')) != NULL)
590 warnx("\".\" and \"..\" may not be removed");
592 for (save = t; (t[0] = t[1]) != NULL; ++t)
604 fprintf(stderr, "%s\n%s\n",
605 "usage: rm [-f | -i] [-dIPRrvW] file ...",