NetBSD/bin/mv/mv.c

300 lines
7.8 KiB
C

/*
* Copyright (c) 1989 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
char copyright[] =
"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
/*static char sccsid[] = "from: @(#)mv.c 5.11 (Berkeley) 4/3/91";*/
static char rcsid[] = "$Id: mv.c,v 1.6 1993/09/22 21:39:19 jtc Exp $";
#endif /* not lint */
#include <sys/param.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "pathnames.h"
int fflg, iflg;
int stdin_ok;
main(argc, argv)
int argc;
char **argv;
{
extern char *optarg;
extern int optind;
register int baselen, exitval, len;
register char *p, *endp;
struct stat sb;
int ch;
char path[MAXPATHLEN + 1];
while (((ch = getopt(argc, argv, "if")) != -1))
switch((char)ch) {
case 'i':
fflg = 0;
iflg = 1;
break;
case 'f':
iflg = 0;
fflg = 1;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc < 2)
usage();
stdin_ok = isatty(STDIN_FILENO);
/*
* 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 = rindex(*argv, '/')) == NULL)
p = *argv;
else
++p;
if ((baselen + (len = strlen(p))) >= MAXPATHLEN)
(void)fprintf(stderr,
"mv: %s: destination pathname too long\n", *argv);
else {
bcopy(p, endp, len + 1);
exitval |= do_move(*argv, path);
}
}
exit(exitval);
}
do_move(from, to)
char *from, *to;
{
struct stat sb;
/* (1) If the destination path exists, the -f option is not specified
* and either of the following conditions are true:
*
* (a) The perimissions of the destination path do not permit
* writing and the standard input is a terminal.
* (b) The -i option is specified.
*
* the mv utility shall write a prompt to standard error and
* read a line from standard input. If the response is not
* affirmative, mv shall do nothing more with the current
* source file...
*/
if (!fflg && !access(to, F_OK)) {
int ask = 0;
int ch;
if (iflg) {
(void)fprintf(stderr, "overwrite %s? ", to);
ask = 1;
} else if (stdin_ok && 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);
}
}
/* (2) If rename() succeeds, mv shall do nothing more with the
* current source file. If it fails for any other reason than
* EXDEV, mv shall write a diagnostic message to the standard
* error and do nothing more with the current source file.
*
* (3) If the destination path exists, and it is a file of type
* directory and source_file is not a file of type directory,
* or it is a file not of type directory, and source file is
* a file of type directory, mv shall write a diagnostic
* message to standard error, and do nothing more with the
* current source file...
*/
if (!rename(from, to))
return(0);
if (errno != EXDEV) {
(void)fprintf(stderr,
"mv: rename %s to %s: %s\n", from, to, strerror(errno));
return(1);
}
/* (4) If the destination path exists, mv shall attempt to remove it.
* If this fails for any reason, mv shall write a diagnostic
* message to the standard error and do nothing more with the
* current source file...
*/
if (!stat(to, &sb)) {
if ((S_ISDIR(sb.st_mode)) ? rmdir(to) : unlink(to)) {
(void) fprintf(stderr,
"mv: can't remove %s: %s\n", to, strerror(errno));
return (1);
}
}
/* (5) The file hierarchy rooted in source_file shall be duplicated
* as a file hiearchy rooted in the destination path...
*/
if (stat(from, &sb)) {
(void)fprintf(stderr, "mv: %s: %s\n", from, strerror(errno));
return(1);
}
return(S_ISREG(sb.st_mode) ?
fastcopy(from, to, &sb) : copy(from, to));
}
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) {
error(from);
return(1);
}
if ((to_fd = open(to, O_CREAT|O_TRUNC|O_WRONLY, sbp->st_mode)) < 0) {
error(to);
(void)close(from_fd);
return(1);
}
if (!blen && !(bp = malloc(blen = sbp->st_blksize))) {
error(NULL);
return(1);
}
while ((nread = read(from_fd, bp, blen)) > 0)
if (write(to_fd, bp, nread) != nread) {
error(to);
goto err;
}
if (nread < 0) {
error(from);
err: (void)unlink(to);
(void)close(from_fd);
(void)close(to_fd);
return(1);
}
(void)fchown(to_fd, sbp->st_uid, sbp->st_gid);
(void)fchmod(to_fd, sbp->st_mode);
(void)close(from_fd);
(void)close(to_fd);
tval[0].tv_sec = sbp->st_atime;
tval[1].tv_sec = sbp->st_mtime;
tval[0].tv_usec = tval[1].tv_usec = 0;
(void)utimes(to, tval);
(void)unlink(from);
return(0);
}
copy(from, to)
char *from, *to;
{
int pid, status;
if (!(pid = vfork())) {
execl(_PATH_CP, "mv", "-pr", from, to, NULL);
error(_PATH_CP);
_exit(1);
}
(void)waitpid(pid, &status, 0);
if (!WIFEXITED(status) || WEXITSTATUS(status))
return(1);
if (!(pid = vfork())) {
execl(_PATH_RM, "mv", "-rf", from, NULL);
error(_PATH_RM);
_exit(1);
}
(void)waitpid(pid, &status, 0);
return(!WIFEXITED(status) || WEXITSTATUS(status));
}
error(s)
char *s;
{
if (s)
(void)fprintf(stderr, "mv: %s: %s\n", s, strerror(errno));
else
(void)fprintf(stderr, "mv: %s\n", strerror(errno));
}
usage()
{
(void)fprintf(stderr,
"usage: mv [-fi] source_file target_file\n"
" mv [-fi] source_file ... target_dir\n");
exit(1);
}