/*-
* 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.
* 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.
*/
#if 0
#ifndef lint
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
static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/acl.h>
#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>
/* Exit code for a failed exec. */
#define EXEC_FAILED 127
int fflg, iflg, nflg, vflg;
static int copy(const char *, const char *);
static int do_move(const char *, const char *);
static int fastcopy(const char *, const char *, struct stat *);
static void usage(void);
static void preserve_fd_acls(int source_fd, int dest_fd, const char *source_path,
const char *dest_path);
int
main(int argc, char *argv[])
{
size_t baselen, len;
int rval;
char *p, *endp;
struct stat sb;
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]));
}
/* 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 (do_move(*argv, path))
rval = 1;
}
}
exit(rval);
}
static int
do_move(const char *from, const char *to)
{
struct stat sb;
int ask, ch, first;
char modep[15];
/*
* 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((unsigned long)sb.st_uid, 0),
group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO);
ask = 1;
}
if (ask) {
first = ch = getchar();
while (ch != '\n' && ch != EOF)
ch = getchar();
if (first != 'y' && first != 'Y') {
(void)fprintf(stderr, "not overwritten\n");
return (0);
}
}
}
/*
* Rename on FreeBSD will fail with EISDIR and ENOTDIR, before failing
* with EXDEV. Therefore, copy() doesn't have to perform the checks
* specified in the Step 3 of the POSIX mv specification.
*/
if (!rename(from, to)) {
if (vflg)
printf("%s -> %s\n", from, to);
return (0);
}
if (errno == EXDEV) {
struct statfs sfs;
char path[PATH_MAX];
/*
* If the source is a symbolic link and is on another
* filesystem, it can be recreated at the destination.
*/
if (lstat(from, &sb) == -1) {
warn("%s", from);
return (1);
}
if (!S_ISLNK(sb.st_mode)) {
/* Can't mv(1) a mount point. */
if (realpath(from, path) == NULL) {
warn("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));
}
static int
fastcopy(const char *from, const char *to, struct stat *sbp)
{
struct timeval tval[2];
static u_int blen;
static char *bp;
mode_t oldmode;
int nread, 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);
}
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);
}
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);
/*
* POSIX 1003.2c states that if _POSIX_ACL_EXTENDED is in effect
* for dest_file, then its ACLs shall reflect the ACLs of the
* source_file.
*/
preserve_fd_acls(from_fd, to_fd, from, to);
(void)close(from_fd);
/*
* 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_long)sbp->st_flags))
if (errno != EOPNOTSUPP || 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);
}
static int
copy(const char *from, const char *to)
{
struct stat sb;
int pid, status;
if (lstat(to, &sb) == 0) {
/* Destination path exists. */
if (S_ISDIR(sb.st_mode)) {
if (rmdir(to) != 0) {
warn("rmdir %s", to);
return (1);
}
} else {
if (unlink(to) != 0) {
warn("unlink %s", to);
return (1);
}
}
} else if (errno != ENOENT) {
warn("%s", to);
return (1);
}
/* Copy source to destination. */
if (!(pid = vfork())) {
execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to,
(char *)NULL);
_exit(EXEC_FAILED);
}
if (waitpid(pid, &status, 0) == -1) {
warn("%s %s %s: waitpid", _PATH_CP, from, to);
return (1);
}
if (!WIFEXITED(status)) {
warnx("%s %s %s: did not terminate normally",
_PATH_CP, from, to);
return (1);
}
switch (WEXITSTATUS(status)) {
case 0:
break;
case EXEC_FAILED:
warnx("%s %s %s: exec failed", _PATH_CP, from, to);
return (1);
default:
warnx("%s %s %s: terminated with %d (non-zero) status",
_PATH_CP, from, to, WEXITSTATUS(status));
return (1);
}
/* Delete the source. */
if (!(pid = vfork())) {
execl(_PATH_RM, "mv", "-rf", "--", from, (char *)NULL);
_exit(EXEC_FAILED);
}
if (waitpid(pid, &status, 0) == -1) {
warn("%s %s: waitpid", _PATH_RM, from);
return (1);
}
if (!WIFEXITED(status)) {
warnx("%s %s: did not terminate normally", _PATH_RM, from);
return (1);
}
switch (WEXITSTATUS(status)) {
case 0:
break;
case EXEC_FAILED:
warnx("%s %s: exec failed", _PATH_RM, from);
return (1);
default:
warnx("%s %s: terminated with %d (non-zero) status",
_PATH_RM, from, WEXITSTATUS(status));
return (1);
}
return (0);
}
static void
preserve_fd_acls(int source_fd, int dest_fd, const char *source_path,
const char *dest_path)
{
acl_t acl;
acl_type_t acl_type;
int acl_supported = 0, ret, trivial;
ret = fpathconf(source_fd, _PC_ACL_NFS4);
if (ret > 0 ) {
acl_supported = 1;
acl_type = ACL_TYPE_NFS4;
} else if (ret < 0 && errno != EINVAL) {
warn("fpathconf(..., _PC_ACL_NFS4) failed for %s",
source_path);
return;
}
if (acl_supported == 0) {
ret = fpathconf(source_fd, _PC_ACL_EXTENDED);
if (ret > 0 ) {
acl_supported = 1;
acl_type = ACL_TYPE_ACCESS;
} else if (ret < 0 && errno != EINVAL) {
warn("fpathconf(..., _PC_ACL_EXTENDED) failed for %s",
source_path);
return;
}
}
if (acl_supported == 0)
return;
acl = acl_get_fd_np(source_fd, acl_type);
if (acl == NULL) {
warn("failed to get acl entries for %s", source_path);
return;
}
if (acl_is_trivial_np(acl, &trivial)) {
warn("acl_is_trivial() failed for %s", source_path);
acl_free(acl);
return;
}
if (trivial) {
acl_free(acl);
return;
}
if (acl_set_fd_np(dest_fd, acl, acl_type) < 0) {
warn("failed to set acl entries for %s", dest_path);
acl_free(acl);
return;
}
acl_free(acl);
}
static 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);
}
