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-rw-r--r--file_cmds/mv/mv.c505
1 files changed, 505 insertions, 0 deletions
diff --git a/file_cmds/mv/mv.c b/file_cmds/mv/mv.c
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+++ b/file_cmds/mv/mv.c
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+/*
+ * Copyright (c) 1989, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Ken Smith of The State University of New York at Buffalo.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+__used static char const copyright[] =
+"@(#) Copyright (c) 1989, 1993, 1994\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94";
+#endif
+#endif /* not lint */
+#include <sys/cdefs.h>
+__RCSID("$FreeBSD: src/bin/mv/mv.c,v 1.39 2002/07/09 17:45:13 johan Exp $");
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <sys/mount.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <grp.h>
+#include <limits.h>
+#include <paths.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sysexits.h>
+#include <unistd.h>
+#include <locale.h>
+
+#ifdef __APPLE__
+#include <copyfile.h>
+#include <sys/mount.h>
+#endif
+
+#ifdef __APPLE__
+#include <get_compat.h>
+#else
+#define COMPAT_MODE(a,b) (1)
+#endif /* __APPLE__ */
+
+#include "pathnames.h"
+
+int fflg, iflg, nflg, vflg;
+
+int copy(char *, char *);
+int do_move(char *, char *);
+int fastcopy(char *, char *, struct stat *);
+void usage(void);
+
+int
+main(int argc, char *argv[])
+{
+ size_t baselen, len;
+ int rval;
+ char *p, *endp;
+ struct stat sb;
+#ifdef __APPLE__
+ struct stat fsb, tsb;
+#endif /* __APPLE__ */
+ int ch;
+ char path[PATH_MAX];
+
+ while ((ch = getopt(argc, argv, "finv")) != -1)
+ switch (ch) {
+ case 'i':
+ iflg = 1;
+ fflg = nflg = 0;
+ break;
+ case 'f':
+ fflg = 1;
+ iflg = nflg = 0;
+ break;
+ case 'n':
+ nflg = 1;
+ fflg = iflg = 0;
+ break;
+ case 'v':
+ vflg = 1;
+ break;
+ default:
+ usage();
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (argc < 2)
+ usage();
+
+ /*
+ * If the stat on the target fails or the target isn't a directory,
+ * try the move. More than 2 arguments is an error in this case.
+ */
+ if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) {
+ if (argc > 2)
+ usage();
+ exit(do_move(argv[0], argv[1]));
+ }
+
+#ifdef __APPLE__
+ if (argc == 2 && !lstat(argv[0], &fsb) && !lstat(argv[1], &tsb) &&
+ fsb.st_ino == tsb.st_ino && fsb.st_dev == tsb.st_dev &&
+ fsb.st_gen == tsb.st_gen) {
+ /*
+ * We appear to be trying to move a directory into itself,
+ * but it may be that the filesystem is case insensitive and
+ * we are trying to rename the directory to a case-variant.
+ * Ignoring trailing slashes, we look for any difference in
+ * the directory names. If there is a difference we do
+ * the rename, otherwise we fall-thru to the traditional
+ * error. Note the lstat calls above (rather than stat)
+ * permit the renaming of symlinks to case-variants.
+ */
+ char *q;
+
+ for (p = argv[0] + strlen(argv[0]); p != argv[0]; ) {
+ p--;
+ if (*p != '/')
+ break;
+ }
+ for (q = argv[1] + strlen(argv[1]); q != argv[1]; ) {
+ q--;
+ if (*q != '/')
+ break;
+ }
+ for ( ; ; p--, q--) {
+ if (*p != *q)
+ exit(do_move(argv[0], argv[1]));
+ if (*p == '/')
+ break;
+ if (p == argv[0]) {
+ if (q == argv[1] || *(q-1) == '/')
+ break;
+ exit(do_move(argv[0], argv[1]));
+ }
+ if (q == argv[1]) {
+ if (p == argv[0] || *(p-1) == '/')
+ break;
+ exit(do_move(argv[0], argv[1]));
+ }
+ }
+ }
+#endif /* __APPLE__ */
+
+ /* It's a directory, move each file into it. */
+ if (strlen(argv[argc - 1]) > sizeof(path) - 1)
+ errx(1, "%s: destination pathname too long", *argv);
+ (void)strcpy(path, argv[argc - 1]);
+ baselen = strlen(path);
+ endp = &path[baselen];
+ if (!baselen || *(endp - 1) != '/') {
+ *endp++ = '/';
+ ++baselen;
+ }
+ for (rval = 0; --argc; ++argv) {
+ /*
+ * Find the last component of the source pathname. It
+ * may have trailing slashes.
+ */
+ p = *argv + strlen(*argv);
+ while (p != *argv && p[-1] == '/')
+ --p;
+ while (p != *argv && p[-1] != '/')
+ --p;
+
+ if ((baselen + (len = strlen(p))) >= PATH_MAX) {
+ warnx("%s: destination pathname too long", *argv);
+ rval = 1;
+ } else {
+ memmove(endp, p, (size_t)len + 1);
+ if (COMPAT_MODE("bin/mv", "unix2003")) {
+ /*
+ * For Unix 2003 compatibility, check if old and new are
+ * same file, and produce an error * (like on Sun) that
+ * conformance test 66 in mv.ex expects.
+ */
+ if (!stat(*argv, &fsb) && !stat(path, &tsb) &&
+ fsb.st_ino == tsb.st_ino &&
+ fsb.st_dev == tsb.st_dev &&
+ fsb.st_gen == tsb.st_gen) {
+ (void)fprintf(stderr, "mv: %s and %s are identical\n",
+ *argv, path);
+ rval = 2; /* Like the Sun */
+ } else {
+ if (do_move(*argv, path))
+ rval = 1;
+ }
+ } else {
+ if (do_move(*argv, path))
+ rval = 1;
+ }
+ }
+ }
+ exit(rval);
+}
+
+int
+do_move(char *from, char *to)
+{
+ struct stat sb;
+ int ask, ch, first;
+ char modep[15];
+ char resp[] = {'\0', '\0'};
+
+ /*
+ * Check access. If interactive and file exists, ask user if it
+ * should be replaced. Otherwise if file exists but isn't writable
+ * make sure the user wants to clobber it.
+ */
+ if (!fflg && !access(to, F_OK)) {
+
+ /* prompt only if source exist */
+ if (lstat(from, &sb) == -1) {
+ warn("%s", from);
+ return (1);
+ }
+
+#define YESNO "(y/n [n]) "
+ ask = 0;
+ if (nflg) {
+ if (vflg)
+ printf("%s not overwritten\n", to);
+ return (0);
+ } else if (iflg) {
+ (void)fprintf(stderr, "overwrite %s? %s", to, YESNO);
+ ask = 1;
+ } else if (access(to, W_OK) && !stat(to, &sb)) {
+ strmode(sb.st_mode, modep);
+ (void)fprintf(stderr, "override %s%s%s/%s for %s? %s",
+ modep + 1, modep[9] == ' ' ? "" : " ",
+ user_from_uid(sb.st_uid, 0),
+ group_from_gid(sb.st_gid, 0), to, YESNO);
+ ask = 1;
+ }
+ if (ask) {
+ /* Load user specified locale */
+ setlocale(LC_MESSAGES, "");
+
+ first = ch = getchar();
+ while (ch != '\n' && ch != EOF)
+ ch = getchar();
+
+ /* only care about the first character */
+ resp[0] = first;
+
+ if (rpmatch(resp) != 1) {
+ (void)fprintf(stderr, "not overwritten\n");
+ return (0);
+ }
+ }
+ }
+ if (!rename(from, to)) {
+ if (vflg)
+ printf("%s -> %s\n", from, to);
+ return (0);
+ }
+
+ if (errno == EXDEV) {
+ struct statfs sfs;
+ char path[PATH_MAX];
+
+ /* Can't mv(1) a mount point. */
+ if (realpath(from, path) == NULL) {
+ warnx("cannot resolve %s: %s", from, path);
+ return (1);
+ }
+ if (!statfs(path, &sfs) && !strcmp(path, sfs.f_mntonname)) {
+ warnx("cannot rename a mount point");
+ return (1);
+ }
+ } else {
+ warn("rename %s to %s", from, to);
+ return (1);
+ }
+
+ /*
+ * If rename fails because we're trying to cross devices, and
+ * it's a regular file, do the copy internally; otherwise, use
+ * cp and rm.
+ */
+ if (lstat(from, &sb)) {
+ warn("%s", from);
+ return (1);
+ }
+ return (S_ISREG(sb.st_mode) ?
+ fastcopy(from, to, &sb) : copy(from, to));
+}
+
+int
+fastcopy(char *from, char *to, struct stat *sbp)
+{
+ struct timeval tval[2];
+ static u_int blen;
+ static char *bp;
+ mode_t oldmode;
+ ssize_t nread;
+ int from_fd, to_fd;
+
+ if ((from_fd = open(from, O_RDONLY, 0)) < 0) {
+ warn("%s", from);
+ return (1);
+ }
+ if (blen < sbp->st_blksize) {
+ if (bp != NULL)
+ free(bp);
+ if ((bp = malloc((size_t)sbp->st_blksize)) == NULL) {
+ blen = 0;
+ warnx("malloc failed");
+ return (1);
+ }
+ blen = sbp->st_blksize;
+ }
+ while ((to_fd =
+ open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) {
+ if (errno == EEXIST && unlink(to) == 0)
+ continue;
+ warn("%s", to);
+ (void)close(from_fd);
+ return (1);
+ }
+#ifdef __APPLE__
+ {
+ struct statfs sfs;
+
+ /*
+ * Pre-allocate blocks for the destination file if it
+ * resides on Xsan.
+ */
+ if (fstatfs(to_fd, &sfs) == 0 &&
+ strcmp(sfs.f_fstypename, "acfs") == 0) {
+ fstore_t fst;
+
+ fst.fst_flags = 0;
+ fst.fst_posmode = F_PEOFPOSMODE;
+ fst.fst_offset = 0;
+ fst.fst_length = sbp->st_size;
+
+ (void) fcntl(to_fd, F_PREALLOCATE, &fst);
+ }
+ }
+#endif /* __APPLE__ */
+ while ((nread = read(from_fd, bp, (size_t)blen)) > 0)
+ if (write(to_fd, bp, (size_t)nread) != nread) {
+ warn("%s", to);
+ goto err;
+ }
+ if (nread < 0) {
+ warn("%s", from);
+err: if (unlink(to))
+ warn("%s: remove", to);
+ (void)close(from_fd);
+ (void)close(to_fd);
+ return (1);
+ }
+#ifdef __APPLE__
+ /* XATTR can fail if to_fd has mode 000 */
+ if (fcopyfile(from_fd, to_fd, NULL, COPYFILE_ACL | COPYFILE_XATTR) < 0) {
+ warn("%s: unable to move extended attributes and ACL from %s",
+ to, from);
+ }
+#endif
+ (void)close(from_fd);
+
+ oldmode = sbp->st_mode & ALLPERMS;
+ if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) {
+ warn("%s: set owner/group (was: %lu/%lu)", to,
+ (u_long)sbp->st_uid, (u_long)sbp->st_gid);
+ if (oldmode & (S_ISUID | S_ISGID)) {
+ warnx(
+"%s: owner/group changed; clearing suid/sgid (mode was 0%03o)",
+ to, oldmode);
+ sbp->st_mode &= ~(S_ISUID | S_ISGID);
+ }
+ }
+ if (fchmod(to_fd, sbp->st_mode))
+ warn("%s: set mode (was: 0%03o)", to, oldmode);
+ /*
+ * XXX
+ * NFS doesn't support chflags; ignore errors unless there's reason
+ * to believe we're losing bits. (Note, this still won't be right
+ * if the server supports flags and we were trying to *remove* flags
+ * on a file that we copied, i.e., that we didn't create.)
+ */
+ errno = 0;
+ if (fchflags(to_fd, (u_int)sbp->st_flags))
+ if (errno != ENOTSUP || sbp->st_flags != 0)
+ warn("%s: set flags (was: 0%07o)", to, sbp->st_flags);
+
+ tval[0].tv_sec = sbp->st_atime;
+ tval[1].tv_sec = sbp->st_mtime;
+ tval[0].tv_usec = tval[1].tv_usec = 0;
+ if (utimes(to, tval))
+ warn("%s: set times", to);
+
+ if (close(to_fd)) {
+ warn("%s", to);
+ return (1);
+ }
+
+ if (unlink(from)) {
+ warn("%s: remove", from);
+ return (1);
+ }
+ if (vflg)
+ printf("%s -> %s\n", from, to);
+ return (0);
+}
+
+int
+copy(char *from, char *to)
+{
+ int pid, status;
+
+ /* posix_spawn cp from to && rm from */
+
+ if ((pid = fork()) == 0) {
+ execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to,
+ (char *)NULL);
+ warn("%s", _PATH_CP);
+ _exit(1);
+ }
+ if (waitpid(pid, &status, 0) == -1) {
+ warn("%s: waitpid", _PATH_CP);
+ return (1);
+ }
+ if (!WIFEXITED(status)) {
+ warnx("%s: did not terminate normally", _PATH_CP);
+ return (1);
+ }
+ if (WEXITSTATUS(status)) {
+ warnx("%s: terminated with %d (non-zero) status",
+ _PATH_CP, WEXITSTATUS(status));
+ return (1);
+ }
+ if (!(pid = vfork())) {
+ execl(_PATH_RM, "mv", "-rf", "--", from, (char *)NULL);
+ warn("%s", _PATH_RM);
+ _exit(1);
+ }
+ if (waitpid(pid, &status, 0) == -1) {
+ warn("%s: waitpid", _PATH_RM);
+ return (1);
+ }
+ if (!WIFEXITED(status)) {
+ warnx("%s: did not terminate normally", _PATH_RM);
+ return (1);
+ }
+ if (WEXITSTATUS(status)) {
+ warnx("%s: terminated with %d (non-zero) status",
+ _PATH_RM, WEXITSTATUS(status));
+ return (1);
+ }
+ return (0);
+}
+
+void
+usage(void)
+{
+
+ (void)fprintf(stderr, "%s\n%s\n",
+ "usage: mv [-f | -i | -n] [-v] source target",
+ " mv [-f | -i | -n] [-v] source ... directory");
+ exit(EX_USAGE);
+}
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