mv.c revision 92974
11556Srgrimes/* 21556Srgrimes * Copyright (c) 1989, 1993, 1994 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * This code is derived from software contributed to Berkeley by 61556Srgrimes * Ken Smith of The State University of New York at Buffalo. 71556Srgrimes * 81556Srgrimes * Redistribution and use in source and binary forms, with or without 91556Srgrimes * modification, are permitted provided that the following conditions 101556Srgrimes * are met: 111556Srgrimes * 1. Redistributions of source code must retain the above copyright 121556Srgrimes * notice, this list of conditions and the following disclaimer. 131556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141556Srgrimes * notice, this list of conditions and the following disclaimer in the 151556Srgrimes * documentation and/or other materials provided with the distribution. 161556Srgrimes * 3. All advertising materials mentioning features or use of this software 171556Srgrimes * must display the following acknowledgement: 181556Srgrimes * This product includes software developed by the University of 191556Srgrimes * California, Berkeley and its contributors. 201556Srgrimes * 4. Neither the name of the University nor the names of its contributors 211556Srgrimes * may be used to endorse or promote products derived from this software 221556Srgrimes * without specific prior written permission. 231556Srgrimes * 241556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341556Srgrimes * SUCH DAMAGE. 351556Srgrimes */ 361556Srgrimes 371556Srgrimes#ifndef lint 3820420Sstevestatic char const copyright[] = 391556Srgrimes"@(#) Copyright (c) 1989, 1993, 1994\n\ 401556Srgrimes The Regents of the University of California. All rights reserved.\n"; 411556Srgrimes#endif /* not lint */ 421556Srgrimes 431556Srgrimes#ifndef lint 4436049Scharnier#if 0 4536049Scharnierstatic char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94"; 4636049Scharnier#endif 471556Srgrimes#endif /* not lint */ 4892974Sobrien#include <sys/cdefs.h> 4992974Sobrien__FBSDID("$FreeBSD: head/bin/mv/mv.c 92974 2002-03-22 19:52:59Z obrien $"); 501556Srgrimes 511556Srgrimes#include <sys/param.h> 521556Srgrimes#include <sys/time.h> 531556Srgrimes#include <sys/wait.h> 541556Srgrimes#include <sys/stat.h> 5531664Seivind#include <sys/mount.h> 561556Srgrimes 571556Srgrimes#include <err.h> 581556Srgrimes#include <errno.h> 591556Srgrimes#include <fcntl.h> 6090644Simp#include <grp.h> 6177409Simp#include <limits.h> 6290644Simp#include <pwd.h> 631556Srgrimes#include <stdio.h> 641556Srgrimes#include <stdlib.h> 651556Srgrimes#include <string.h> 6650544Smharo#include <sysexits.h> 671556Srgrimes#include <unistd.h> 681556Srgrimes 691556Srgrimes#include "pathnames.h" 701556Srgrimes 7192935Sobrienint fflg, iflg, nflg, vflg; 721556Srgrimes 7390110Simpint copy(char *, char *); 7490110Simpint do_move(char *, char *); 7590110Simpint fastcopy(char *, char *, struct stat *); 7690110Simpvoid usage(void); 771556Srgrimes 781556Srgrimesint 7990110Simpmain(int argc, char *argv[]) 801556Srgrimes{ 8191085Smarkm size_t baselen, len; 8291085Smarkm int rval; 8390114Simp char *p, *endp; 841556Srgrimes struct stat sb; 851556Srgrimes int ch; 8677409Simp char path[PATH_MAX]; 871556Srgrimes 8892935Sobrien while ((ch = getopt(argc, argv, "finv")) != -1) 891556Srgrimes switch (ch) { 901556Srgrimes case 'i': 9114154Swosch iflg = 1; 9292935Sobrien fflg = nflg = 0; 931556Srgrimes break; 941556Srgrimes case 'f': 951556Srgrimes fflg = 1; 9692935Sobrien iflg = nflg = 0; 971556Srgrimes break; 9892935Sobrien case 'n': 9992935Sobrien nflg = 1; 10092935Sobrien fflg = iflg = 0; 10192935Sobrien break; 10250544Smharo case 'v': 10350544Smharo vflg = 1; 10450544Smharo break; 1051556Srgrimes default: 1061556Srgrimes usage(); 1071556Srgrimes } 10814305Swosch argc -= optind; 1091556Srgrimes argv += optind; 1101556Srgrimes 1111556Srgrimes if (argc < 2) 1121556Srgrimes usage(); 1131556Srgrimes 1141556Srgrimes /* 1151556Srgrimes * If the stat on the target fails or the target isn't a directory, 1161556Srgrimes * try the move. More than 2 arguments is an error in this case. 1171556Srgrimes */ 1181556Srgrimes if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 1191556Srgrimes if (argc > 2) 1201556Srgrimes usage(); 1211556Srgrimes exit(do_move(argv[0], argv[1])); 1221556Srgrimes } 1231556Srgrimes 1241556Srgrimes /* It's a directory, move each file into it. */ 12536785Simp if (strlen(argv[argc - 1]) > sizeof(path) - 1) 12636785Simp errx(1, "%s: destination pathname too long", *argv); 1271556Srgrimes (void)strcpy(path, argv[argc - 1]); 1281556Srgrimes baselen = strlen(path); 1291556Srgrimes endp = &path[baselen]; 13036383Ssteve if (!baselen || *(endp - 1) != '/') { 13136383Ssteve *endp++ = '/'; 13236383Ssteve ++baselen; 13336383Ssteve } 1341556Srgrimes for (rval = 0; --argc; ++argv) { 13511298Sbde /* 13611298Sbde * Find the last component of the source pathname. It 13711298Sbde * may have trailing slashes. 13811298Sbde */ 13911298Sbde p = *argv + strlen(*argv); 14011298Sbde while (p != *argv && p[-1] == '/') 14111298Sbde --p; 14211298Sbde while (p != *argv && p[-1] != '/') 14311298Sbde --p; 14411298Sbde 14577409Simp if ((baselen + (len = strlen(p))) >= PATH_MAX) { 1461556Srgrimes warnx("%s: destination pathname too long", *argv); 1471556Srgrimes rval = 1; 1481556Srgrimes } else { 14976878Skris memmove(endp, p, (size_t)len + 1); 1501556Srgrimes if (do_move(*argv, path)) 1511556Srgrimes rval = 1; 1521556Srgrimes } 1531556Srgrimes } 1541556Srgrimes exit(rval); 1551556Srgrimes} 1561556Srgrimes 1571556Srgrimesint 15890110Simpdo_move(char *from, char *to) 1591556Srgrimes{ 1601556Srgrimes struct stat sb; 16129933Swosch int ask, ch, first; 1621556Srgrimes char modep[15]; 1631556Srgrimes 1641556Srgrimes /* 1651556Srgrimes * Check access. If interactive and file exists, ask user if it 1661556Srgrimes * should be replaced. Otherwise if file exists but isn't writable 1671556Srgrimes * make sure the user wants to clobber it. 1681556Srgrimes */ 1691556Srgrimes if (!fflg && !access(to, F_OK)) { 17014166Swosch 17114166Swosch /* prompt only if source exist */ 17214166Swosch if (lstat(from, &sb) == -1) { 17314305Swosch warn("%s", from); 17414305Swosch return (1); 17514166Swosch } 17630106Swosch 17730106Swosch#define YESNO "(y/n [n]) " 1781556Srgrimes ask = 0; 17992935Sobrien if (nflg) { 18092935Sobrien if (vflg) 18192935Sobrien printf("%s not overwritten\n", to); 18292935Sobrien return (0); 18392935Sobrien } else if (iflg) { 18430106Swosch (void)fprintf(stderr, "overwrite %s? %s", to, YESNO); 1851556Srgrimes ask = 1; 1861556Srgrimes } else if (access(to, W_OK) && !stat(to, &sb)) { 1871556Srgrimes strmode(sb.st_mode, modep); 18830106Swosch (void)fprintf(stderr, "override %s%s%s/%s for %s? %s", 1891556Srgrimes modep + 1, modep[9] == ' ' ? "" : " ", 19076878Skris user_from_uid((unsigned long)sb.st_uid, 0), 19176878Skris group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO); 1921556Srgrimes ask = 1; 1931556Srgrimes } 1941556Srgrimes if (ask) { 19529933Swosch first = ch = getchar(); 19629933Swosch while (ch != '\n' && ch != EOF) 19729933Swosch ch = getchar(); 19830106Swosch if (first != 'y' && first != 'Y') { 19930106Swosch (void)fprintf(stderr, "not overwritten\n"); 2001556Srgrimes return (0); 20130106Swosch } 2021556Srgrimes } 2031556Srgrimes } 20450544Smharo if (!rename(from, to)) { 20550544Smharo if (vflg) 20650544Smharo printf("%s -> %s\n", from, to); 2071556Srgrimes return (0); 20850544Smharo } 2091556Srgrimes 21031664Seivind if (errno == EXDEV) { 21131664Seivind struct statfs sfs; 21277409Simp char path[PATH_MAX]; 21331664Seivind 21431664Seivind /* Can't mv(1) a mount point. */ 21531664Seivind if (realpath(from, path) == NULL) { 21631664Seivind warnx("cannot resolve %s: %s", from, path); 21731664Seivind return (1); 21831664Seivind } 21931664Seivind if (!statfs(path, &sfs) && !strcmp(path, sfs.f_mntonname)) { 22031664Seivind warnx("cannot rename a mount point"); 22131664Seivind return (1); 22231664Seivind } 22331664Seivind } else { 2241556Srgrimes warn("rename %s to %s", from, to); 2251556Srgrimes return (1); 2261556Srgrimes } 2271556Srgrimes 2281556Srgrimes /* 2291556Srgrimes * If rename fails because we're trying to cross devices, and 2301556Srgrimes * it's a regular file, do the copy internally; otherwise, use 2311556Srgrimes * cp and rm. 2321556Srgrimes */ 23362963Sdwmalone if (lstat(from, &sb)) { 2341556Srgrimes warn("%s", from); 2351556Srgrimes return (1); 2361556Srgrimes } 2371556Srgrimes return (S_ISREG(sb.st_mode) ? 2381556Srgrimes fastcopy(from, to, &sb) : copy(from, to)); 2391556Srgrimes} 2401556Srgrimes 2411556Srgrimesint 24290110Simpfastcopy(char *from, char *to, struct stat *sbp) 2431556Srgrimes{ 2441556Srgrimes struct timeval tval[2]; 2451556Srgrimes static u_int blen; 2461556Srgrimes static char *bp; 24723525Sguido mode_t oldmode; 24890114Simp int nread, from_fd, to_fd; 2491556Srgrimes 2501556Srgrimes if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 2511556Srgrimes warn("%s", from); 2521556Srgrimes return (1); 2531556Srgrimes } 25423525Sguido if (blen < sbp->st_blksize) { 25523525Sguido if (bp != NULL) 25623525Sguido free(bp); 25776878Skris if ((bp = malloc((size_t)sbp->st_blksize)) == NULL) { 25823525Sguido blen = 0; 25923525Sguido warnx("malloc failed"); 26023525Sguido return (1); 26123525Sguido } 26223525Sguido blen = sbp->st_blksize; 26323525Sguido } 26423525Sguido while ((to_fd = 26523525Sguido open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) { 26623525Sguido if (errno == EEXIST && unlink(to) == 0) 26723525Sguido continue; 2681556Srgrimes warn("%s", to); 2691556Srgrimes (void)close(from_fd); 2701556Srgrimes return (1); 2711556Srgrimes } 27276878Skris while ((nread = read(from_fd, bp, (size_t)blen)) > 0) 27376878Skris if (write(to_fd, bp, (size_t)nread) != nread) { 2741556Srgrimes warn("%s", to); 2751556Srgrimes goto err; 2761556Srgrimes } 2771556Srgrimes if (nread < 0) { 2781556Srgrimes warn("%s", from); 2791556Srgrimeserr: if (unlink(to)) 2801556Srgrimes warn("%s: remove", to); 2811556Srgrimes (void)close(from_fd); 2821556Srgrimes (void)close(to_fd); 2831556Srgrimes return (1); 2841556Srgrimes } 2851556Srgrimes (void)close(from_fd); 2861556Srgrimes 28723525Sguido oldmode = sbp->st_mode & ALLPERMS; 28823525Sguido if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 28937245Sbde warn("%s: set owner/group (was: %lu/%lu)", to, 29037245Sbde (u_long)sbp->st_uid, (u_long)sbp->st_gid); 29123525Sguido if (oldmode & (S_ISUID | S_ISGID)) { 29223525Sguido warnx( 29323525Sguido"%s: owner/group changed; clearing suid/sgid (mode was 0%03o)", 29423525Sguido to, oldmode); 29523525Sguido sbp->st_mode &= ~(S_ISUID | S_ISGID); 29623525Sguido } 29723525Sguido } 2981556Srgrimes if (fchmod(to_fd, sbp->st_mode)) 29923525Sguido warn("%s: set mode (was: 0%03o)", to, oldmode); 30063680Ssada /* 30163680Ssada * XXX 30263680Ssada * NFS doesn't support chflags; ignore errors unless there's reason 30363680Ssada * to believe we're losing bits. (Note, this still won't be right 30463680Ssada * if the server supports flags and we were trying to *remove* flags 30563680Ssada * on a file that we copied, i.e., that we didn't create.) 30663680Ssada */ 30763680Ssada errno = 0; 30876878Skris if (fchflags(to_fd, (u_long)sbp->st_flags)) 30963680Ssada if (errno != EOPNOTSUPP || sbp->st_flags != 0) 31063680Ssada warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 3111556Srgrimes 3121556Srgrimes tval[0].tv_sec = sbp->st_atime; 3131556Srgrimes tval[1].tv_sec = sbp->st_mtime; 3141556Srgrimes tval[0].tv_usec = tval[1].tv_usec = 0; 3151556Srgrimes if (utimes(to, tval)) 3161556Srgrimes warn("%s: set times", to); 3171556Srgrimes 3181556Srgrimes if (close(to_fd)) { 3191556Srgrimes warn("%s", to); 3201556Srgrimes return (1); 3211556Srgrimes } 3221556Srgrimes 3231556Srgrimes if (unlink(from)) { 3241556Srgrimes warn("%s: remove", from); 3251556Srgrimes return (1); 3261556Srgrimes } 32750544Smharo if (vflg) 32850544Smharo printf("%s -> %s\n", from, to); 3291556Srgrimes return (0); 3301556Srgrimes} 3311556Srgrimes 3321556Srgrimesint 33390110Simpcopy(char *from, char *to) 3341556Srgrimes{ 3351556Srgrimes int pid, status; 3361556Srgrimes 33740301Sdes if ((pid = fork()) == 0) { 33879452Sbrian execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", from, to, 33979452Sbrian (char *)NULL); 3401556Srgrimes warn("%s", _PATH_CP); 3411556Srgrimes _exit(1); 3421556Srgrimes } 3431556Srgrimes if (waitpid(pid, &status, 0) == -1) { 3441556Srgrimes warn("%s: waitpid", _PATH_CP); 3451556Srgrimes return (1); 3461556Srgrimes } 3471556Srgrimes if (!WIFEXITED(status)) { 3481556Srgrimes warn("%s: did not terminate normally", _PATH_CP); 3491556Srgrimes return (1); 3501556Srgrimes } 3511556Srgrimes if (WEXITSTATUS(status)) { 3521556Srgrimes warn("%s: terminated with %d (non-zero) status", 3531556Srgrimes _PATH_CP, WEXITSTATUS(status)); 3541556Srgrimes return (1); 3551556Srgrimes } 3561556Srgrimes if (!(pid = vfork())) { 35779452Sbrian execl(_PATH_RM, "mv", "-rf", from, (char *)NULL); 3581556Srgrimes warn("%s", _PATH_RM); 3591556Srgrimes _exit(1); 3601556Srgrimes } 3611556Srgrimes if (waitpid(pid, &status, 0) == -1) { 3621556Srgrimes warn("%s: waitpid", _PATH_RM); 3631556Srgrimes return (1); 3641556Srgrimes } 3651556Srgrimes if (!WIFEXITED(status)) { 3661556Srgrimes warn("%s: did not terminate normally", _PATH_RM); 3671556Srgrimes return (1); 3681556Srgrimes } 3691556Srgrimes if (WEXITSTATUS(status)) { 3701556Srgrimes warn("%s: terminated with %d (non-zero) status", 3711556Srgrimes _PATH_RM, WEXITSTATUS(status)); 3721556Srgrimes return (1); 3731556Srgrimes } 3741556Srgrimes return (0); 3751556Srgrimes} 3761556Srgrimes 3771556Srgrimesvoid 37890110Simpusage(void) 3791556Srgrimes{ 38050544Smharo 38114305Swosch (void)fprintf(stderr, "%s\n%s\n", 38250544Smharo "usage: mv [-f | -i] [-v] source target", 38350544Smharo " mv [-f | -i] [-v] source ... directory"); 38450544Smharo exit(EX_USAGE); 3851556Srgrimes} 386