27e79e1d84
`mv foo/ ../..' to `mv foo/ ../../foo/', not to `mv foo/ ../../'. The latter caused a panic. Before the trailing slash changes in the kernel, the trailing slashes caused the rename() for this mv to fail earlier, so there was no panic in 2.0. Fixes part of PR 760.
309 lines
7.4 KiB
C
309 lines
7.4 KiB
C
/*
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* Copyright (c) 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ken Smith of The State University of New York at Buffalo.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: mv.c,v 1.2 1994/09/24 02:56:07 davidg Exp $
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*/
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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1989, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "pathnames.h"
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int fflg, iflg;
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int copy __P((char *, char *));
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int do_move __P((char *, char *));
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int fastcopy __P((char *, char *, struct stat *));
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void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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register int baselen, len, rval;
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register char *p, *endp;
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struct stat sb;
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int ch;
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char path[MAXPATHLEN + 1];
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while ((ch = getopt(argc, argv, "-if")) != EOF)
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switch (ch) {
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case 'i':
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iflg = 1;
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break;
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case 'f':
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fflg = 1;
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break;
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case '-': /* Undocumented; for compatibility. */
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goto endarg;
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case '?':
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default:
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usage();
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}
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endarg: argc -= optind;
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argv += optind;
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if (argc < 2)
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usage();
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/*
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* If the stat on the target fails or the target isn't a directory,
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* try the move. More than 2 arguments is an error in this case.
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*/
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if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) {
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if (argc > 2)
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usage();
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exit(do_move(argv[0], argv[1]));
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}
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/* It's a directory, move each file into it. */
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(void)strcpy(path, argv[argc - 1]);
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baselen = strlen(path);
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endp = &path[baselen];
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*endp++ = '/';
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++baselen;
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for (rval = 0; --argc; ++argv) {
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/*
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* Find the last component of the source pathname. It
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* may have trailing slashes.
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*/
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p = *argv + strlen(*argv);
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while (p != *argv && p[-1] == '/')
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--p;
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while (p != *argv && p[-1] != '/')
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--p;
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if ((baselen + (len = strlen(p))) >= MAXPATHLEN) {
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warnx("%s: destination pathname too long", *argv);
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rval = 1;
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} else {
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memmove(endp, p, len + 1);
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if (do_move(*argv, path))
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rval = 1;
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}
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}
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exit(rval);
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}
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int
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do_move(from, to)
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char *from, *to;
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{
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struct stat sb;
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int ask, ch;
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char modep[15];
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/*
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* Check access. If interactive and file exists, ask user if it
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* should be replaced. Otherwise if file exists but isn't writable
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* make sure the user wants to clobber it.
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*/
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if (!fflg && !access(to, F_OK)) {
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ask = 0;
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if (iflg) {
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(void)fprintf(stderr, "overwrite %s? ", to);
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ask = 1;
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} else if (access(to, W_OK) && !stat(to, &sb)) {
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strmode(sb.st_mode, modep);
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(void)fprintf(stderr, "override %s%s%s/%s for %s? ",
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modep + 1, modep[9] == ' ' ? "" : " ",
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user_from_uid(sb.st_uid, 0),
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group_from_gid(sb.st_gid, 0), to);
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ask = 1;
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}
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if (ask) {
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if ((ch = getchar()) != EOF && ch != '\n')
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while (getchar() != '\n');
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if (ch != 'y')
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return (0);
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}
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}
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if (!rename(from, to))
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return (0);
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if (errno != EXDEV) {
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warn("rename %s to %s", from, to);
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return (1);
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}
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/*
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* If rename fails because we're trying to cross devices, and
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* it's a regular file, do the copy internally; otherwise, use
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* cp and rm.
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*/
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if (stat(from, &sb)) {
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warn("%s", from);
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return (1);
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}
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return (S_ISREG(sb.st_mode) ?
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fastcopy(from, to, &sb) : copy(from, to));
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}
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int
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fastcopy(from, to, sbp)
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char *from, *to;
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struct stat *sbp;
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{
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struct timeval tval[2];
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static u_int blen;
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static char *bp;
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register int nread, from_fd, to_fd;
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if ((from_fd = open(from, O_RDONLY, 0)) < 0) {
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warn("%s", from);
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return (1);
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}
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if ((to_fd =
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open(to, O_CREAT | O_TRUNC | O_WRONLY, sbp->st_mode)) < 0) {
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warn("%s", to);
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(void)close(from_fd);
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return (1);
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}
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if (!blen && !(bp = malloc(blen = sbp->st_blksize))) {
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warn(NULL);
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return (1);
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}
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while ((nread = read(from_fd, bp, blen)) > 0)
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if (write(to_fd, bp, nread) != nread) {
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warn("%s", to);
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goto err;
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}
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if (nread < 0) {
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warn("%s", from);
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err: if (unlink(to))
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warn("%s: remove", to);
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(void)close(from_fd);
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(void)close(to_fd);
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return (1);
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}
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(void)close(from_fd);
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if (fchown(to_fd, sbp->st_uid, sbp->st_gid))
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warn("%s: set owner/group", to);
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if (fchmod(to_fd, sbp->st_mode))
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warn("%s: set mode", to);
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tval[0].tv_sec = sbp->st_atime;
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tval[1].tv_sec = sbp->st_mtime;
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tval[0].tv_usec = tval[1].tv_usec = 0;
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if (utimes(to, tval))
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warn("%s: set times", to);
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if (close(to_fd)) {
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warn("%s", to);
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return (1);
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}
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if (unlink(from)) {
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warn("%s: remove", from);
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return (1);
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}
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return (0);
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}
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int
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copy(from, to)
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char *from, *to;
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{
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int pid, status;
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if ((pid = vfork()) == 0) {
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execl(_PATH_CP, "mv", "-PRp", from, to, NULL);
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warn("%s", _PATH_CP);
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_exit(1);
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}
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if (waitpid(pid, &status, 0) == -1) {
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warn("%s: waitpid", _PATH_CP);
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return (1);
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}
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if (!WIFEXITED(status)) {
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warn("%s: did not terminate normally", _PATH_CP);
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return (1);
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}
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if (WEXITSTATUS(status)) {
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warn("%s: terminated with %d (non-zero) status",
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_PATH_CP, WEXITSTATUS(status));
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return (1);
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}
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if (!(pid = vfork())) {
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execl(_PATH_RM, "mv", "-rf", from, NULL);
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warn("%s", _PATH_RM);
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_exit(1);
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}
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if (waitpid(pid, &status, 0) == -1) {
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warn("%s: waitpid", _PATH_RM);
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return (1);
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}
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if (!WIFEXITED(status)) {
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warn("%s: did not terminate normally", _PATH_RM);
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return (1);
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}
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if (WEXITSTATUS(status)) {
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warn("%s: terminated with %d (non-zero) status",
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_PATH_RM, WEXITSTATUS(status));
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return (1);
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}
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return (0);
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}
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void
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usage()
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{
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(void)fprintf(stderr,
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"usage: mv [-if] src target;\n or: mv [-if] src1 ... srcN directory\n");
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exit(1);
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}
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