[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[] = "@(#)mv.c	5.11 (Berkeley) 4/3/91";
#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;

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")) != 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 = 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;
	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) {
		(void)fprintf(stderr,
		    "mv: rename %s to %s: %s\n", from, to, strerror(errno));
		return(1);
	}

	/*
	 * If rename fails, and it's a regular file, do the copy internally;
	 * otherwise, use cp and rm.
	 */
	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 [-if] src target;\n   or: mv [-if] src1 ... srcN directory\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
	44	static char sccsid[] = "@(#)mv.c 5.11 (Berkeley) 4/3/91";
	45	#endif /* not lint */
	46
	47	#include <sys/param.h>
	48	#include <sys/time.h>
	49	#include <sys/wait.h>
	50	#include <sys/stat.h>
	51	#include <fcntl.h>
	52	#include <errno.h>
	53	#include <unistd.h>
	54	#include <stdio.h>
	55	#include <stdlib.h>
	56	#include <string.h>
	57	#include "pathnames.h"
	58
	59	int fflg, iflg;
	60
	61	main(argc, argv)
	62	int argc;
	63	char **argv;
	64	{
65	extern char *optarg;
66	extern int optind;
67	register int baselen, exitval, len;
68	register char p, endp;
69	struct stat sb;
70	int ch;
71	char path[MAXPATHLEN + 1];
72
73	while (((ch = getopt(argc, argv, "-if")) != EOF))
74	switch((char)ch) {
75	case 'i':
76	iflg = 1;
77	break;
78	case 'f':
79	fflg = 1;
80	break;
81	case '-': /* undocumented; for compatibility */
82	goto endarg;
83	case '?':
84	default:
85	usage();
86	}
87	endarg: argc -= optind;
88	argv += optind;
89
90	if (argc < 2)
91	usage();
92
93	/*
94	* If the stat on the target fails or the target isn't a directory,
95	* try the move. More than 2 arguments is an error in this case.
96	*/
97	if (stat(argv[argc - 1], &sb) \|\| !S_ISDIR(sb.st_mode)) {
98	if (argc > 2)
99	usage();
100	exit(do_move(argv[0], argv[1]));
101	}
102
103	/* It's a directory, move each file into it. */
104	(void)strcpy(path, argv[argc - 1]);
105	baselen = strlen(path);
106	endp = &path[baselen];
107	*endp++ = '/';
108	++baselen;
109	for (exitval = 0; --argc; ++argv) {
110	if ((p = rindex(*argv, '/')) == NULL)
111	p = *argv;
112	else
113	++p;
114	if ((baselen + (len = strlen(p))) >= MAXPATHLEN)
115	(void)fprintf(stderr,
116	"mv: %s: destination pathname too long\n", *argv);
117	else {
118	bcopy(p, endp, len + 1);
119	exitval \|= do_move(*argv, path);
120	}
121	}
122	exit(exitval);
123	}
124
125	do_move(from, to)
126	char from, to;
127	{
128	struct stat sb;
129	int ask, ch;
130
131	/*
132	* Check access. If interactive and file exists, ask user if it
133	* should be replaced. Otherwise if file exists but isn't writable
134	* make sure the user wants to clobber it.
135	*/
136	if (!fflg && !access(to, F_OK)) {
137	ask = 0;
138	if (iflg) {
139	(void)fprintf(stderr, "overwrite %s? ", to);
140	ask = 1;
141	}
142	else if (access(to, W_OK) && !stat(to, &sb)) {
143	(void)fprintf(stderr, "override mode %o on %s? ",
144	sb.st_mode & 07777, to);
145	ask = 1;
146	}
147	if (ask) {
148	if ((ch = getchar()) != EOF && ch != '\n')
149	while (getchar() != '\n');
150	if (ch != 'y')
151	return(0);
152	}
153	}
154	if (!rename(from, to))
155	return(0);
156
157	if (errno != EXDEV) {
158	(void)fprintf(stderr,
159	"mv: rename %s to %s: %s\n", from, to, strerror(errno));
160	return(1);
161	}
162
163	/*
164	* If rename fails, and it's a regular file, do the copy internally;
165	* otherwise, use cp and rm.
166	*/
167	if (stat(from, &sb)) {
168	(void)fprintf(stderr, "mv: %s: %s\n", from, strerror(errno));
169	return(1);
170	}
171	return(S_ISREG(sb.st_mode) ?
172	fastcopy(from, to, &sb) : copy(from, to));
173	}
174
175	fastcopy(from, to, sbp)
176	char from, to;
177	struct stat *sbp;
178	{
179	struct timeval tval[2];
180	static u_int blen;
181	static char *bp;
182	register int nread, from_fd, to_fd;
183
184	if ((from_fd = open(from, O_RDONLY, 0)) < 0) {
185	error(from);
186	return(1);
187	}
188	if ((to_fd = open(to, O_CREAT\|O_TRUNC\|O_WRONLY, sbp->st_mode)) < 0) {
189	error(to);
190	(void)close(from_fd);
191	return(1);
192	}
193	if (!blen && !(bp = malloc(blen = sbp->st_blksize))) {
194	error(NULL);
195	return(1);
196	}
197	while ((nread = read(from_fd, bp, blen)) > 0)
198	if (write(to_fd, bp, nread) != nread) {
199	error(to);
200	goto err;
201	}
202	if (nread < 0) {
203	error(from);
204	err: (void)unlink(to);
205	(void)close(from_fd);
206	(void)close(to_fd);
207	return(1);
208	}
209	(void)fchown(to_fd, sbp->st_uid, sbp->st_gid);
210	(void)fchmod(to_fd, sbp->st_mode);
211
212	(void)close(from_fd);
213	(void)close(to_fd);
214
215	tval[0].tv_sec = sbp->st_atime;
216	tval[1].tv_sec = sbp->st_mtime;
217	tval[0].tv_usec = tval[1].tv_usec = 0;
218	(void)utimes(to, tval);
219	(void)unlink(from);
220	return(0);
221	}
222
223	copy(from, to)
224	char from, to;
225	{
226	int pid, status;
227
228	if (!(pid = vfork())) {
229	execl(_PATH_CP, "mv", "-pr", from, to, NULL);
230	error(_PATH_CP);
231	_exit(1);
232	}
233	(void)waitpid(pid, &status, 0);
234	if (!WIFEXITED(status) \|\| WEXITSTATUS(status))
235	return(1);
236	if (!(pid = vfork())) {
237	execl(_PATH_RM, "mv", "-rf", from, NULL);
238	error(_PATH_RM);
239	_exit(1);
240	}
241	(void)waitpid(pid, &status, 0);
242	return(!WIFEXITED(status) \|\| WEXITSTATUS(status));
243	}
244
245	error(s)
246	char *s;
247	{
248	if (s)
249	(void)fprintf(stderr, "mv: %s: %s\n", s, strerror(errno));
250	else
251	(void)fprintf(stderr, "mv: %s\n", strerror(errno));
252	}
253
254	usage()
255	{
256	(void)fprintf(stderr,
257	"usage: mv [-if] src target;\n or: mv [-if] src1 ... srcN directory\n");
258	exit(1);
259	}