4.4BSD/usr/src/bin/mv/mv.c
/*
* Copyright (c) 1989, 1993
* 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.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)mv.c 8.1 (Berkeley) 5/31/93";
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "pathnames.h"
int fflg, iflg;
int copy __P((char *, char *));
int do_move __P((char *, char *));
int fastcopy __P((char *, char *, struct stat *));
void usage __P((void));
int
main(argc, argv)
int argc;
char *argv[];
{
register int baselen, exitval, len;
register char *p, *endp;
struct stat sb;
int ch;
char path[MAXPATHLEN + 1];
while (((ch = getopt(argc, argv, "-if")) != EOF))
switch((char)ch) {
case 'i':
iflg = 1;
break;
case 'f':
fflg = 1;
break;
case '-': /* Undocumented; for compatibility. */
goto endarg;
case '?':
default:
usage();
}
endarg: 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. */
(void)strcpy(path, argv[argc - 1]);
baselen = strlen(path);
endp = &path[baselen];
*endp++ = '/';
++baselen;
for (exitval = 0; --argc; ++argv) {
if ((p = strrchr(*argv, '/')) == NULL)
p = *argv;
else
++p;
if ((baselen + (len = strlen(p))) >= MAXPATHLEN) {
warnx("%s: destination pathname too long", *argv);
exitval = 1;
} else {
memmove(endp, p, len + 1);
exitval |= do_move(*argv, path);
}
}
exit(exitval);
}
int
do_move(from, to)
char *from, *to;
{
struct stat sb;
int ask, ch;
/*
* 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)) {
ask = 0;
if (iflg) {
(void)fprintf(stderr, "overwrite %s? ", to);
ask = 1;
}
else if (access(to, W_OK) && !stat(to, &sb)) {
(void)fprintf(stderr, "override mode %o on %s? ",
sb.st_mode & 07777, to);
ask = 1;
}
if (ask) {
if ((ch = getchar()) != EOF && ch != '\n')
while (getchar() != '\n');
if (ch != 'y')
return (0);
}
}
if (!rename(from, to))
return (0);
if (errno != EXDEV) {
warn("rename %s to %s", from, to);
return (1);
}
/*
* If rename fails, and it's a regular file, do the copy internally;
* otherwise, use cp and rm.
*/
if (stat(from, &sb)) {
warn("%s", from);
return (1);
}
return (S_ISREG(sb.st_mode) ?
fastcopy(from, to, &sb) : copy(from, to));
}
int
fastcopy(from, to, sbp)
char *from, *to;
struct stat *sbp;
{
struct timeval tval[2];
static u_int blen;
static char *bp;
register int nread, from_fd, to_fd;
if ((from_fd = open(from, O_RDONLY, 0)) < 0) {
warn("%s", from);
return (1);
}
if ((to_fd = open(to, O_CREAT|O_TRUNC|O_WRONLY, sbp->st_mode)) < 0) {
warn("%s", to);
(void)close(from_fd);
return (1);
}
if (!blen && !(bp = malloc(blen = sbp->st_blksize))) {
warn(NULL);
return (1);
}
while ((nread = read(from_fd, bp, blen)) > 0)
if (write(to_fd, bp, 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);
}
(void)close(from_fd);
if (fchown(to_fd, sbp->st_uid, sbp->st_gid))
warn("%s: set owner/group", to);
if (fchmod(to_fd, sbp->st_mode))
warn("%s: set mode", to);
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);
}
return (0);
}
int
copy(from, to)
char *from, *to;
{
int pid, status;
if (!(pid = vfork())) {
execl(_PATH_CP, "mv", "-pR", from, to, NULL);
warn("%s", _PATH_CP);
_exit(1);
}
if (waitpid(pid, &status, 0) == -1) {
warn("%s: waitpid", _PATH_CP);
return (1);
}
if (!WIFEXITED(status)) {
warn("%s: did not terminate normally", _PATH_CP);
return (1);
}
if (WEXITSTATUS(status)) {
warn("%s: terminated with %d (non-zero) status",
_PATH_CP, WEXITSTATUS(status));
return (1);
}
if (!(pid = vfork())) {
execl(_PATH_RM, "mv", "-rf", from, NULL);
warn("%s", _PATH_RM);
_exit(1);
}
if (waitpid(pid, &status, 0) == -1) {
warn("%s: waitpid", _PATH_RM);
return (1);
}
if (!WIFEXITED(status)) {
warn("%s: did not terminate normally", _PATH_RM);
return (1);
}
if (WEXITSTATUS(status)) {
warn("%s: terminated with %d (non-zero) status",
_PATH_RM, WEXITSTATUS(status));
return (1);
}
return (0);
}
void
usage()
{
(void)fprintf(stderr,
"usage: mv [-if] src target;\n or: mv [-if] src1 ... srcN directory\n");
exit(1);
}