[unix-history] / bin / mv / mv.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 1.7 1993/11/09 18:58:03 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' && 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);
}
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1989 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Ken Smith of The State University of New York at Buffalo.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. All advertising materials mentioning features or use of this software
	17	* must display the following acknowledgement:
	18	* This product includes software developed by the University of
	19	* California, Berkeley and its contributors.
	20	* 4. Neither the name of the University nor the names of its contributors
	21	* may be used to endorse or promote products derived from this software
	22	* without specific prior written permission.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	34	* SUCH DAMAGE.
	35	*/
	36
	37	#ifndef lint
	38	char copyright[] =
	39	"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
	40	All rights reserved.\n";
	41	#endif /* not lint */
	42
	43	#ifndef lint
e3f791dd C	44	/static char sccsid[] = "from: @(#)mv.c 5.11 (Berkeley) 4/3/91";/
e3f791dd C	45	static char rcsid[] = "$Id: mv.c,v 1.7 1993/11/09 18:58:03 jtc Exp $";
15637ed4 RG	46	#endif /* not lint */
	47
	48	#include <sys/param.h>
	49	#include <sys/time.h>
	50	#include <sys/wait.h>
	51	#include <sys/stat.h>
	52	#include <fcntl.h>
	53	#include <errno.h>
	54	#include <unistd.h>
	55	#include <stdio.h>
	56	#include <stdlib.h>
	57	#include <string.h>
	58	#include "pathnames.h"
	59
	60	int fflg, iflg;
e3f791dd	61	int stdin_ok;
15637ed4 RG	62
	63	main(argc, argv)
	64	int argc;
	65	char **argv;
	66	{
	67	extern char *optarg;
	68	extern int optind;
	69	register int baselen, exitval, len;
	70	register char p, endp;
	71	struct stat sb;
	72	int ch;
	73	char path[MAXPATHLEN + 1];
	74
e3f791dd	75	while (((ch = getopt(argc, argv, "if")) != -1))
15637ed4 RG	76	switch((char)ch) {
15637ed4 RG	77	case 'i':
e3f791dd	78	fflg = 0;
15637ed4 RG	79	iflg = 1;
	80	break;
	81	case 'f':
e3f791dd	82	iflg = 0;
15637ed4 RG	83	fflg = 1;
15637ed4 RG	84	break;
15637ed4 RG	85	case '?':
	86	default:
	87	usage();
	88	}
e3f791dd	89	argc -= optind;
15637ed4 RG	90	argv += optind;
	91
	92	if (argc < 2)
	93	usage();
	94
e3f791dd C	95	stdin_ok = isatty(STDIN_FILENO);
e3f791dd C	96
15637ed4 RG	97	/*
	98	* If the stat on the target fails or the target isn't a directory,
	99	* try the move. More than 2 arguments is an error in this case.
	100	*/
	101	if (stat(argv[argc - 1], &sb) \|\| !S_ISDIR(sb.st_mode)) {
	102	if (argc > 2)
	103	usage();
	104	exit(do_move(argv[0], argv[1]));
	105	}
	106
	107	/* It's a directory, move each file into it. */
	108	(void)strcpy(path, argv[argc - 1]);
	109	baselen = strlen(path);
	110	endp = &path[baselen];
	111	*endp++ = '/';
	112	++baselen;
	113	for (exitval = 0; --argc; ++argv) {
	114	if ((p = rindex(*argv, '/')) == NULL)
	115	p = *argv;
	116	else
	117	++p;
	118	if ((baselen + (len = strlen(p))) >= MAXPATHLEN)
	119	(void)fprintf(stderr,
	120	"mv: %s: destination pathname too long\n", *argv);
	121	else {
	122	bcopy(p, endp, len + 1);
	123	exitval \|= do_move(*argv, path);
	124	}
	125	}
	126	exit(exitval);
	127	}
	128
	129	do_move(from, to)
	130	char from, to;
	131	{
	132	struct stat sb;
15637ed4	133
e3f791dd C	134	/* (1) If the destination path exists, the -f option is not specified
	135	* and either of the following conditions are true:
	136	*
	137	* (a) The perimissions of the destination path do not permit
	138	* writing and the standard input is a terminal.
	139	* (b) The -i option is specified.
	140	*
	141	* the mv utility shall write a prompt to standard error and
	142	* read a line from standard input. If the response is not
	143	* affirmative, mv shall do nothing more with the current
	144	* source file...
15637ed4 RG	145	*/
15637ed4 RG	146	if (!fflg && !access(to, F_OK)) {
e3f791dd C	147	int ask = 0;
	148	int ch;
	149
15637ed4 RG	150	if (iflg) {
	151	(void)fprintf(stderr, "overwrite %s? ", to);
	152	ask = 1;
e3f791dd	153	} else if (stdin_ok && access(to, W_OK) && !stat(to, &sb)) {
15637ed4 RG	154	(void)fprintf(stderr, "override mode %o on %s? ",
	155	sb.st_mode & 07777, to);
	156	ask = 1;
	157	}
	158	if (ask) {
	159	if ((ch = getchar()) != EOF && ch != '\n')
	160	while (getchar() != '\n');
e3f791dd	161	if (ch != 'y' && ch != 'Y')
15637ed4 RG	162	return(0);
	163	}
	164	}
e3f791dd C	165
	166
	167	/* (2) If rename() succeeds, mv shall do nothing more with the
	168	* current source file. If it fails for any other reason than
	169	* EXDEV, mv shall write a diagnostic message to the standard
	170	* error and do nothing more with the current source file.
	171	*
	172	* (3) If the destination path exists, and it is a file of type
	173	* directory and source_file is not a file of type directory,
	174	* or it is a file not of type directory, and source file is
	175	* a file of type directory, mv shall write a diagnostic
	176	* message to standard error, and do nothing more with the
	177	* current source file...
	178	*/
15637ed4 RG	179	if (!rename(from, to))
	180	return(0);
	181
	182	if (errno != EXDEV) {
	183	(void)fprintf(stderr,
	184	"mv: rename %s to %s: %s\n", from, to, strerror(errno));
	185	return(1);
	186	}
	187
e3f791dd C	188
	189	/* (4) If the destination path exists, mv shall attempt to remove it.
	190	* If this fails for any reason, mv shall write a diagnostic
	191	* message to the standard error and do nothing more with the
	192	* current source file...
	193	*/
	194	if (!stat(to, &sb)) {
	195	if ((S_ISDIR(sb.st_mode)) ? rmdir(to) : unlink(to)) {
	196	(void) fprintf(stderr,
	197	"mv: can't remove %s: %s\n", to, strerror(errno));
	198	return (1);
	199	}
	200	}
	201
	202
	203	/* (5) The file hierarchy rooted in source_file shall be duplicated
	204	* as a file hiearchy rooted in the destination path...
15637ed4 RG	205	*/
	206	if (stat(from, &sb)) {
	207	(void)fprintf(stderr, "mv: %s: %s\n", from, strerror(errno));
	208	return(1);
	209	}
	210	return(S_ISREG(sb.st_mode) ?
	211	fastcopy(from, to, &sb) : copy(from, to));
	212	}
	213
	214	fastcopy(from, to, sbp)
	215	char from, to;
	216	struct stat *sbp;
	217	{
	218	struct timeval tval[2];
	219	static u_int blen;
	220	static char *bp;
	221	register int nread, from_fd, to_fd;
	222
	223	if ((from_fd = open(from, O_RDONLY, 0)) < 0) {
	224	error(from);
	225	return(1);
	226	}
	227	if ((to_fd = open(to, O_CREAT\|O_TRUNC\|O_WRONLY, sbp->st_mode)) < 0) {
	228	error(to);
	229	(void)close(from_fd);
	230	return(1);
	231	}
	232	if (!blen && !(bp = malloc(blen = sbp->st_blksize))) {
	233	error(NULL);
	234	return(1);
	235	}
	236	while ((nread = read(from_fd, bp, blen)) > 0)
	237	if (write(to_fd, bp, nread) != nread) {
	238	error(to);
	239	goto err;
	240	}
	241	if (nread < 0) {
	242	error(from);
	243	err: (void)unlink(to);
	244	(void)close(from_fd);
	245	(void)close(to_fd);
	246	return(1);
	247	}
	248	(void)fchown(to_fd, sbp->st_uid, sbp->st_gid);
	249	(void)fchmod(to_fd, sbp->st_mode);
	250
	251	(void)close(from_fd);
	252	(void)close(to_fd);
	253
	254	tval[0].tv_sec = sbp->st_atime;
	255	tval[1].tv_sec = sbp->st_mtime;
	256	tval[0].tv_usec = tval[1].tv_usec = 0;
	257	(void)utimes(to, tval);
	258	(void)unlink(from);
	259	return(0);
	260	}
	261
	262	copy(from, to)
	263	char from, to;
	264	{
	265	int pid, status;
	266
	267	if (!(pid = vfork())) {
	268	execl(_PATH_CP, "mv", "-pr", from, to, NULL);
269	error(_PATH_CP);
270	_exit(1);
271	}
272	(void)waitpid(pid, &status, 0);
273	if (!WIFEXITED(status) \|\| WEXITSTATUS(status))
274	return(1);
275	if (!(pid = vfork())) {
276	execl(_PATH_RM, "mv", "-rf", from, NULL);
277	error(_PATH_RM);
278	_exit(1);
279	}
280	(void)waitpid(pid, &status, 0);
281	return(!WIFEXITED(status) \|\| WEXITSTATUS(status));
282	}
283
284	error(s)
285	char *s;
286	{
287	if (s)
288	(void)fprintf(stderr, "mv: %s: %s\n", s, strerror(errno));
289	else
290	(void)fprintf(stderr, "mv: %s\n", strerror(errno));
291	}
292
293	usage()
294	{
e3f791dd C	295	(void)fprintf(stderr,
	296	"usage: mv [-fi] source_file target_file\n"
	297	" mv [-fi] source_file ... target_dir\n");
15637ed4 RG	298	exit(1);
15637ed4 RG	299	}