470 lines
12 KiB
C
470 lines
12 KiB
C
/*-
|
|
* 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>
|
|
|
|
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;
|
|
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);
|
|
}
|
|
|
|
int
|
|
do_move(char *from, 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);
|
|
}
|
|
}
|
|
}
|
|
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) {
|
|
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;
|
|
int nread, from_fd, to_fd;
|
|
acl_t acl;
|
|
|
|
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);
|
|
}
|
|
}
|
|
/*
|
|
* POSIX 1003.2c states that if _POSIX_ACL_EXTENDED is in effect
|
|
* for dest_file, then it's ACLs shall reflect the ACLs of the
|
|
* source_file.
|
|
*/
|
|
if (fpathconf(to_fd, _PC_ACL_EXTENDED) == 1 &&
|
|
fpathconf(from_fd, _PC_ACL_EXTENDED) == 1) {
|
|
acl = acl_get_fd(from_fd);
|
|
if (acl == NULL)
|
|
warn("failed to get acl entries while setting %s",
|
|
from);
|
|
else if (acl_set_fd(to_fd, acl) < 0)
|
|
warn("failed to set acl entries for %s", to);
|
|
}
|
|
(void)close(from_fd);
|
|
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_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);
|
|
}
|
|
|
|
int
|
|
copy(char *from, char *to)
|
|
{
|
|
struct stat sb;
|
|
enum clean {CLEAN_SOURCE, CLEAN_DEST, CLEAN_ODEST, CLEAN_MAX};
|
|
char *cleanup[CLEAN_MAX];
|
|
int pid, status;
|
|
volatile int i, rval;
|
|
|
|
rval = 0;
|
|
for (i = 0; i < CLEAN_MAX; i++)
|
|
cleanup[i] = NULL;
|
|
/*
|
|
* If "to" exists and is a directory, get it out of the way.
|
|
* When the copy succeeds, delete it.
|
|
*/
|
|
if (stat(to, &sb) == 0 && S_ISDIR(sb.st_mode)) {
|
|
if (asprintf(&cleanup[CLEAN_ODEST], "%s.XXXXXX", to) == -1) {
|
|
warnx("asprintf failed");
|
|
return (1);
|
|
|
|
}
|
|
if (rename(to, cleanup[CLEAN_ODEST]) < 0) {
|
|
warn("rename of existing target from %s to %s failed",
|
|
to, cleanup[CLEAN_ODEST]);
|
|
free(cleanup[CLEAN_ODEST]);
|
|
return (1);
|
|
}
|
|
}
|
|
/* Copy source to destination. */
|
|
cleanup[CLEAN_DEST] = to;
|
|
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);
|
|
rval = 1;
|
|
goto done;
|
|
}
|
|
if (!WIFEXITED(status)) {
|
|
warnx("%s: did not terminate normally", _PATH_CP);
|
|
rval = 1;
|
|
goto done;
|
|
}
|
|
if (WEXITSTATUS(status)) {
|
|
warnx("%s: terminated with %d (non-zero) status",
|
|
_PATH_CP, WEXITSTATUS(status));
|
|
rval = 1;
|
|
goto done;
|
|
}
|
|
/*
|
|
* The copy succeeded. From now on the destination is where users
|
|
* will find their files.
|
|
*/
|
|
cleanup[CLEAN_DEST] = NULL;
|
|
cleanup[CLEAN_SOURCE] = from;
|
|
done:
|
|
/* Clean what needs to be cleaned. */
|
|
for (i = 0; i < CLEAN_MAX; i++) {
|
|
if (cleanup[i] == NULL)
|
|
continue;
|
|
if (!(pid = vfork())) {
|
|
execl(_PATH_RM, "mv", "-rf", "--", cleanup[i],
|
|
(char *)NULL);
|
|
warn("%s %s", _PATH_RM, cleanup[i]);
|
|
_exit(1);
|
|
}
|
|
if (waitpid(pid, &status, 0) == -1) {
|
|
warn("%s %s: waitpid", _PATH_RM, cleanup[i]);
|
|
rval = 1;
|
|
continue;
|
|
}
|
|
if (!WIFEXITED(status)) {
|
|
warnx("%s %s: did not terminate normally",
|
|
_PATH_RM, cleanup[i]);
|
|
rval = 1;
|
|
continue;
|
|
}
|
|
if (WEXITSTATUS(status)) {
|
|
warnx("%s %s: terminated with %d (non-zero) status",
|
|
_PATH_RM, cleanup[i], WEXITSTATUS(status));
|
|
rval = 1;
|
|
continue;
|
|
}
|
|
/*
|
|
* If the copy failed, and we just deleted the copy's trash,
|
|
* try to salvage the original destination,
|
|
*/
|
|
if (i == CLEAN_DEST && cleanup[CLEAN_ODEST]) {
|
|
if (rename(cleanup[CLEAN_ODEST], to) < 0) {
|
|
warn("rename back renamed existing target from %s to %s failed",
|
|
cleanup[CLEAN_ODEST], to);
|
|
rval = 1;
|
|
}
|
|
free(cleanup[CLEAN_ODEST]);
|
|
cleanup[CLEAN_ODEST] = NULL;
|
|
}
|
|
}
|
|
if (cleanup[CLEAN_ODEST])
|
|
free(cleanup[CLEAN_ODEST]);
|
|
return (rval);
|
|
}
|
|
|
|
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);
|
|
}
|