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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 static const char copyright[] =
33 "@(#) Copyright (c) 1990, 1993, 1994\n\
34 The Regents of the University of California. All rights reserved.\n";
38 static char sccsid[] = "@(#)rm.c 8.5 (Berkeley) 4/18/94";
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
45 #include <sys/param.h>
46 #include <sys/mount.h>
60 int dflag, eval, fflag, iflag, Pflag, vflag, Wflag, stdin_ok;
64 int check(char *, char *, struct stat *);
66 void checkdot(char **);
67 void checkslash(char **);
68 void rm_file(char **);
69 int rm_overwrite(char *, struct stat *);
70 void rm_tree(char **);
75 * This rm is different from historic rm's, but is expected to match
76 * POSIX 1003.2 behavior. The most visible difference is that -f
77 * has two specific effects now, ignore non-existent files and force
81 main(int argc, char *argv[])
87 * Test for the special case where the utility is called as
88 * "unlink", for which the functionality provided is greatly
91 if ((p = rindex(argv[0], '/')) == NULL)
95 if (strcmp(p, "unlink") == 0) {
96 while (getopt(argc, argv, "") != -1)
107 while ((ch = getopt(argc, argv, "dfiIPRrvW")) != -1)
127 case 'r': /* Compatibility. */
149 if (getenv("POSIXLY_CORRECT") == NULL)
154 stdin_ok = isatty(STDIN_FILENO);
157 if (check2(argv) == 0)
179 * Remove a file hierarchy. If forcing removal (-f), or interactive
180 * (-i) or can't ask anyway (stdin_ok), don't stat the file.
182 needstat = !uid || (!fflag && !iflag && stdin_ok);
185 * If the -i option is specified, the user can skip on the pre-order
186 * visit. The fts_number field flags skipped directories.
190 flags = FTS_PHYSICAL;
194 flags |= FTS_WHITEOUT;
195 if (!(fts = fts_open(argv, flags, NULL))) {
196 if (fflag && errno == ENOENT)
200 while ((p = fts_read(fts)) != NULL) {
201 switch (p->fts_info) {
203 if (!fflag || p->fts_errno != ENOENT) {
205 p->fts_path, strerror(p->fts_errno));
210 errx(1, "%s: %s", p->fts_path, strerror(p->fts_errno));
213 * Assume that since fts_read() couldn't stat the
214 * file, it can't be unlinked.
218 if (!fflag || p->fts_errno != ENOENT) {
220 p->fts_path, strerror(p->fts_errno));
225 /* Pre-order: give user chance to skip. */
226 if (!fflag && !check(p->fts_path, p->fts_accpath,
228 (void)fts_set(fts, p, FTS_SKIP);
229 p->fts_number = SKIPPED;
232 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
233 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
234 chflags(p->fts_accpath,
235 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)) < 0)
239 /* Post-order: see if user skipped. */
240 if (p->fts_number == SKIPPED)
245 !check(p->fts_path, p->fts_accpath, p->fts_statp))
251 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
252 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)))
253 rval = chflags(p->fts_accpath,
254 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE));
257 * If we can't read or search the directory, may still be
258 * able to remove it. Don't print out the un{read,search}able
259 * message unless the remove fails.
261 switch (p->fts_info) {
264 rval = rmdir(p->fts_accpath);
265 if (rval == 0 || (fflag && errno == ENOENT)) {
266 if (rval == 0 && vflag)
274 rval = undelete(p->fts_accpath);
275 if (rval == 0 && (fflag && errno == ENOENT)) {
285 * Assume that since fts_read() couldn't stat
286 * the file, it can't be unlinked.
293 if (!rm_overwrite(p->fts_accpath, NULL))
295 rval = unlink(p->fts_accpath);
296 if (rval == 0 || (fflag && errno == ENOENT)) {
297 if (rval == 0 && vflag)
305 warn("%s", p->fts_path);
320 * Remove a file. POSIX 1003.2 states that, by default, attempting
321 * to remove a directory is an error, so must always stat the file.
323 while ((f = *argv++) != NULL) {
324 /* Assume if can't stat the file, can't unlink it. */
327 sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR;
329 if (!fflag || errno != ENOENT) {
336 warnx("%s: %s", f, strerror(EEXIST));
341 if (S_ISDIR(sb.st_mode) && !dflag) {
342 warnx("%s: is a directory", f);
346 if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb))
350 (sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
351 !(sb.st_flags & (SF_APPEND|SF_IMMUTABLE)))
352 rval = chflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE));
354 if (S_ISWHT(sb.st_mode))
356 else if (S_ISDIR(sb.st_mode))
360 if (!rm_overwrite(f, &sb))
365 if (rval && (!fflag || errno != ENOENT)) {
369 if (vflag && rval == 0)
370 (void)printf("%s\n", f);
376 * Overwrite the file 3 times with varying bit patterns.
379 * This is a cheap way to *really* delete files. Note that only regular
380 * files are deleted, directories (and therefore names) will remain.
381 * Also, this assumes a fixed-block file system (like FFS, or a V7 or a
382 * System V file system). In a logging file system, you'll have to have
386 rm_overwrite(char *file, struct stat *sbp)
396 if (lstat(file, &sb))
400 if (!S_ISREG(sbp->st_mode))
402 if ((fd = open(file, O_WRONLY, 0)) == -1)
404 if (fstatfs(fd, &fsb) == -1)
406 bsize = MAX(fsb.f_iosize, 1024);
407 if ((buf = malloc(bsize)) == NULL)
408 err(1, "%s: malloc", file);
410 #define PASS(byte) { \
411 memset(buf, byte, bsize); \
412 for (len = sbp->st_size; len > 0; len -= wlen) { \
413 wlen = len < bsize ? len : bsize; \
414 if (write(fd, buf, wlen) != wlen) \
419 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
422 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
425 if (!fsync(fd) && !close(fd)) {
441 check(char *path, char *name, struct stat *sp)
444 char modep[15], *flagsp;
446 /* Check -i first. */
448 (void)fprintf(stderr, "remove %s? ", path);
451 * If it's not a symbolic link and it's unwritable and we're
452 * talking to a terminal, ask. Symbolic links are excluded
453 * because their permissions are meaningless. Check stdin_ok
454 * first because we may not have stat'ed the file.
456 if (!stdin_ok || S_ISLNK(sp->st_mode) ||
457 (!access(name, W_OK) &&
458 !(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
459 (!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !uid)))
461 strmode(sp->st_mode, modep);
462 if ((flagsp = fflagstostr(sp->st_flags)) == NULL)
463 err(1, "fflagstostr");
466 "%s: -P was specified, but file is not writable",
468 (void)fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ",
469 modep + 1, modep[9] == ' ' ? "" : " ",
470 user_from_uid(sp->st_uid, 0),
471 group_from_gid(sp->st_gid, 0),
472 *flagsp ? flagsp : "", *flagsp ? " " : "",
476 (void)fflush(stderr);
478 first = ch = getchar();
479 while (ch != '\n' && ch != EOF)
481 return (first == 'y' || first == 'Y');
484 #define ISSLASH(a) ((a)[0] == '/' && (a)[1] == '\0')
486 checkslash(char **argv)
492 for (t = argv; *t;) {
495 warnx("\"/\" may not be removed");
497 for (u = t; u[0] != NULL; ++u)
514 const char *dname = NULL;
516 for (i = 0; argv[i]; ++i) {
517 if (lstat(argv[i], &st) == 0) {
518 if (S_ISDIR(st.st_mode)) {
520 dname = argv[i]; /* only used if 1 dir */
527 while (first != 'n' && first != 'N' && first != 'y' && first != 'Y') {
528 if (dcount && rflag) {
529 fprintf(stderr, "recursively remove");
531 fprintf(stderr, " %s", dname);
533 fprintf(stderr, " %d dirs", dcount);
535 fprintf(stderr, " and 1 file");
537 fprintf(stderr, " and %d files", fcount);
538 } else if (dcount + fcount > 3) {
539 fprintf(stderr, "remove %d files", dcount + fcount);
543 fprintf(stderr, "? ");
546 first = ch = getchar();
547 while (ch != '\n' && ch != EOF)
552 return (first == 'y' || first == 'Y');
555 #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
557 checkdot(char **argv)
559 char *p, **save, **t;
563 for (t = argv; *t;) {
564 if ((p = strrchr(*t, '/')) != NULL)
570 warnx("\".\" and \"..\" may not be removed");
572 for (save = t; (t[0] = t[1]) != NULL; ++t)
584 (void)fprintf(stderr, "%s\n%s\n",
585 "usage: rm [-f | -i] [-dIPRrvW] file ...",