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. 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
29 * @(#) Copyright (c) 1990, 1993, 1994 The Regents of the University of California. All rights reserved.
30 * @(#)rm.c 8.5 (Berkeley) 4/18/94
31 * $FreeBSD: src/bin/rm/rm.c,v 1.29.2.5 2002/07/12 07:25:48 tjr Exp $
35 #include <sys/param.h>
36 #include <sys/mount.h>
37 #include <sys/ioctl.h>
52 static int dflag, eval, fflag, iflag, Pflag, vflag, Wflag, stdin_ok;
53 static int rflag, Iflag, xflag;
55 static volatile sig_atomic_t info;
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 siginfo(int);
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)
100 Pflag = rflag = xflag = 0;
101 while ((ch = getopt(argc, argv, "dfiIPRrvWx")) != -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. */
157 signal(SIGINFO, siginfo);
160 stdin_ok = isatty(STDIN_FILENO);
162 if (Iflag && !iflag) {
163 if (check2(argv) == 0)
185 * Remove a file hierarchy. If forcing removal (-f), or interactive
186 * (-i) or can't ask anyway (stdin_ok), don't stat the file.
188 needstat = !uid || (!fflag && !iflag && stdin_ok);
191 * If the -i option is specified, the user can skip on the pre-order
192 * visit. The fts_number field flags skipped directories.
196 flags = FTS_PHYSICAL;
200 flags |= FTS_WHITEOUT;
203 if ((fts = fts_open(argv, flags, NULL)) == NULL) {
204 if (fflag && errno == ENOENT)
208 while ((p = fts_read(fts)) != NULL) {
209 switch (p->fts_info) {
211 if (!fflag || p->fts_errno != ENOENT) {
213 p->fts_path, strerror(p->fts_errno));
218 errx(1, "%s: %s", p->fts_path, strerror(p->fts_errno));
221 * Assume that since fts_read() couldn't stat
222 * the file, it can't be unlinked.
226 if (!fflag || p->fts_errno != ENOENT) {
228 p->fts_path, strerror(p->fts_errno));
233 /* Pre-order: give user chance to skip. */
234 if (!fflag && !check(p->fts_path, p->fts_accpath,
236 fts_set(fts, p, FTS_SKIP);
237 p->fts_number = SKIPPED;
240 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
241 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
242 lchflags(p->fts_accpath,
243 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)) < 0)
247 /* Post-order: see if user skipped. */
248 if (p->fts_number == SKIPPED)
253 !check(p->fts_path, p->fts_accpath, p->fts_statp))
259 fprintf(stderr, "Currently removing: %s\n", p->fts_path);
264 (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
265 !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)))
266 rval = lchflags(p->fts_accpath,
267 p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE));
271 * If we can't read or search the directory, may still be
272 * able to remove it. Don't print out the un{read,search}able
273 * message unless the remove fails.
275 switch (p->fts_info) {
278 rval = rmdir(p->fts_accpath);
279 if (rval == 0 || (fflag && errno == ENOENT)) {
280 if (rval == 0 && vflag)
288 rval = undelete(p->fts_accpath);
289 if (rval == 0 && (fflag && errno == ENOENT)) {
299 * Assume that since fts_read() couldn't stat
300 * the file, it can't be unlinked.
307 if (!rm_overwrite(p->fts_accpath, NULL))
309 rval = unlink(p->fts_accpath);
310 if (rval == 0 || (fflag && errno == ENOENT)) {
311 if (rval == 0 && vflag)
319 warn("%s", p->fts_path);
335 * Remove a file. POSIX 1003.2 states that, by default, attempting
336 * to remove a directory is an error, so must always stat the file.
338 while ((f = *argv++) != NULL) {
341 fprintf(stderr, "Currently removing: %s\n", f);
344 /* Assume if can't stat the file, can't unlink it. */
347 sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR;
349 if (!fflag || errno != ENOENT) {
356 warnx("%s: %s", f, strerror(EEXIST));
361 if (S_ISDIR(sb.st_mode) && !dflag) {
362 warnx("%s: is a directory", f);
366 if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb))
369 if (!uid && !S_ISWHT(sb.st_mode) &&
370 (sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
371 !(sb.st_flags & (SF_APPEND|SF_IMMUTABLE)))
372 rval = lchflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE));
374 if (S_ISWHT(sb.st_mode))
376 else if (S_ISDIR(sb.st_mode))
380 if (!rm_overwrite(f, &sb))
385 if (rval && (!fflag || errno != ENOENT)) {
389 if (vflag && rval == 0)
396 * Overwrite the file 3 times with varying bit patterns.
399 * This is a cheap way to *really* delete files. Note that only regular
400 * files are deleted, directories (and therefore names) will remain.
401 * Also, this assumes a fixed-block filesystem (like FFS, or a V7 or a
402 * System V filesystem). In a logging filesystem, you'll have to have
406 rm_overwrite(const char *file, struct stat *sbp)
416 if (lstat(file, &sb))
420 if (!S_ISREG(sbp->st_mode)) {
421 warnx("%s: cannot overwrite a non-regular file", file);
424 if (sbp->st_nlink > 1) {
425 warnx("%s (inode %ju): not overwritten due to multiple links",
426 file, (uintmax_t)sbp->st_ino);
429 if ((fd = open(file, O_WRONLY, 0)) == -1)
431 if (fstatfs(fd, &fsb) == -1)
433 bsize = MAX(fsb.f_iosize, 1024);
434 if ((buf = malloc(bsize)) == NULL)
435 err(1, "%s malloc failed", file);
437 #define PASS(byte) { \
438 memset(buf, byte, bsize); \
439 for (len = sbp->st_size; len > 0; len -= wlen) { \
440 wlen = len < bsize ? len : bsize; \
441 if (write(fd, buf, wlen) != wlen) \
446 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
449 if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
452 if (!fsync(fd) && !close(fd)) {
468 check(const char *path, const char *name, struct stat *sp)
470 static int perm_answer = -1;
476 } *choice, choices[] = {
477 { 'y', "yes" , 1, 0 },
478 { 'n', "no" , 0, 0 },
479 { 'a', "always", 1, 1 },
480 { 'v', "never" , 0, 1 },
483 char modep[15], *flagsp;
485 if (perm_answer != -1)
486 return (perm_answer);
488 /* Check -i first. */
490 fprintf(stderr, "remove %s? ", path);
493 * If it's not a symbolic link and it's unwritable and we're
494 * talking to a terminal, ask. Symbolic links are excluded
495 * because their permissions are meaningless. Check stdin_ok
496 * first because we may not have stat'ed the file.
497 * Also skip this check if the -P option was specified because
498 * we will not be able to overwrite file contents and will
501 if (!stdin_ok || S_ISLNK(sp->st_mode) || Pflag ||
502 (!access(name, W_OK) &&
503 !(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
504 (!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !uid)))
506 strmode(sp->st_mode, modep);
507 if ((flagsp = fflagstostr(sp->st_flags)) == NULL)
509 fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ",
510 modep + 1, modep[9] == ' ' ? "" : " ",
511 user_from_uid(sp->st_uid, 0),
512 group_from_gid(sp->st_gid, 0),
513 *flagsp ? flagsp : "", *flagsp ? " " : "",
523 answer = fgetln(stdin, &len);
524 /* clearerr(stdin); */
527 if (answer[len - 1] == '\n')
532 for (choice = choices; choice->str != NULL; choice++) {
533 if (len == 1 && choice->ch == answer[0])
535 if (strncasecmp(answer, choice->str, len) == 0)
539 fprintf(stderr, "invalid answer, try again (y/n/a/v): ");
544 perm_answer = choice->res;
545 return (choice->res);
557 const char *dname = NULL;
559 for (i = 0; argv[i]; ++i) {
560 if (lstat(argv[i], &st) == 0) {
561 if (S_ISDIR(st.st_mode)) {
563 dname = argv[i]; /* only used if 1 dir */
570 while (first != 'n' && first != 'N' && first != 'y' && first != 'Y') {
571 if (dcount && rflag) {
572 fprintf(stderr, "recursively remove");
574 fprintf(stderr, " %s", dname);
576 fprintf(stderr, " %d dirs", dcount);
578 fprintf(stderr, " and 1 file");
580 fprintf(stderr, " and %d files", fcount);
581 } else if (dcount + fcount > 3) {
582 fprintf(stderr, "remove %d files", dcount + fcount);
586 fprintf(stderr, "? ");
589 first = ch = getchar();
590 while (ch != '\n' && ch != EOF)
595 return (first == 'y' || first == 'Y');
598 #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
600 checkdot(char **argv)
602 char *p, **save, **t;
606 for (t = argv; *t;) {
607 if ((p = strrchr(*t, '/')) != NULL)
613 warnx("\".\" and \"..\" may not be removed");
615 for (save = t; (t[0] = t[1]) != NULL; ++t)
627 fprintf(stderr, "%s\n%s\n",
628 "usage: rm [-f | -i] [-dIPRrvWx] file ...",
634 siginfo(int notused __unused)