mv.c revision 98280
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 98280 2002-06-16 04:06:58Z tjr $"); 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> 6296806Sjmallett#include <paths.h> 6390644Simp#include <pwd.h> 641556Srgrimes#include <stdio.h> 651556Srgrimes#include <stdlib.h> 661556Srgrimes#include <string.h> 6750544Smharo#include <sysexits.h> 681556Srgrimes#include <unistd.h> 691556Srgrimes 701556Srgrimes#include "pathnames.h" 711556Srgrimes 7292935Sobrienint fflg, iflg, nflg, vflg; 731556Srgrimes 7490110Simpint copy(char *, char *); 7590110Simpint do_move(char *, char *); 7690110Simpint fastcopy(char *, char *, struct stat *); 7790110Simpvoid usage(void); 781556Srgrimes 791556Srgrimesint 8090110Simpmain(int argc, char *argv[]) 811556Srgrimes{ 8291085Smarkm size_t baselen, len; 8391085Smarkm int rval; 8490114Simp char *p, *endp; 851556Srgrimes struct stat sb; 861556Srgrimes int ch; 8777409Simp char path[PATH_MAX]; 881556Srgrimes 8992935Sobrien while ((ch = getopt(argc, argv, "finv")) != -1) 901556Srgrimes switch (ch) { 911556Srgrimes case 'i': 9214154Swosch iflg = 1; 9392935Sobrien fflg = nflg = 0; 941556Srgrimes break; 951556Srgrimes case 'f': 961556Srgrimes fflg = 1; 9792935Sobrien iflg = nflg = 0; 981556Srgrimes break; 9992935Sobrien case 'n': 10092935Sobrien nflg = 1; 10192935Sobrien fflg = iflg = 0; 10292935Sobrien break; 10350544Smharo case 'v': 10450544Smharo vflg = 1; 10550544Smharo break; 1061556Srgrimes default: 1071556Srgrimes usage(); 1081556Srgrimes } 10914305Swosch argc -= optind; 1101556Srgrimes argv += optind; 1111556Srgrimes 1121556Srgrimes if (argc < 2) 1131556Srgrimes usage(); 1141556Srgrimes 1151556Srgrimes /* 1161556Srgrimes * If the stat on the target fails or the target isn't a directory, 1171556Srgrimes * try the move. More than 2 arguments is an error in this case. 1181556Srgrimes */ 1191556Srgrimes if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 1201556Srgrimes if (argc > 2) 1211556Srgrimes usage(); 1221556Srgrimes exit(do_move(argv[0], argv[1])); 1231556Srgrimes } 1241556Srgrimes 1251556Srgrimes /* It's a directory, move each file into it. */ 12636785Simp if (strlen(argv[argc - 1]) > sizeof(path) - 1) 12736785Simp errx(1, "%s: destination pathname too long", *argv); 1281556Srgrimes (void)strcpy(path, argv[argc - 1]); 1291556Srgrimes baselen = strlen(path); 1301556Srgrimes endp = &path[baselen]; 13136383Ssteve if (!baselen || *(endp - 1) != '/') { 13236383Ssteve *endp++ = '/'; 13336383Ssteve ++baselen; 13436383Ssteve } 1351556Srgrimes for (rval = 0; --argc; ++argv) { 13611298Sbde /* 13711298Sbde * Find the last component of the source pathname. It 13811298Sbde * may have trailing slashes. 13911298Sbde */ 14011298Sbde p = *argv + strlen(*argv); 14111298Sbde while (p != *argv && p[-1] == '/') 14211298Sbde --p; 14311298Sbde while (p != *argv && p[-1] != '/') 14411298Sbde --p; 14511298Sbde 14677409Simp if ((baselen + (len = strlen(p))) >= PATH_MAX) { 1471556Srgrimes warnx("%s: destination pathname too long", *argv); 1481556Srgrimes rval = 1; 1491556Srgrimes } else { 15076878Skris memmove(endp, p, (size_t)len + 1); 1511556Srgrimes if (do_move(*argv, path)) 1521556Srgrimes rval = 1; 1531556Srgrimes } 1541556Srgrimes } 1551556Srgrimes exit(rval); 1561556Srgrimes} 1571556Srgrimes 1581556Srgrimesint 15990110Simpdo_move(char *from, char *to) 1601556Srgrimes{ 1611556Srgrimes struct stat sb; 16229933Swosch int ask, ch, first; 1631556Srgrimes char modep[15]; 1641556Srgrimes 1651556Srgrimes /* 1661556Srgrimes * Check access. If interactive and file exists, ask user if it 1671556Srgrimes * should be replaced. Otherwise if file exists but isn't writable 1681556Srgrimes * make sure the user wants to clobber it. 1691556Srgrimes */ 1701556Srgrimes if (!fflg && !access(to, F_OK)) { 17114166Swosch 17214166Swosch /* prompt only if source exist */ 17314166Swosch if (lstat(from, &sb) == -1) { 17414305Swosch warn("%s", from); 17514305Swosch return (1); 17614166Swosch } 17730106Swosch 17830106Swosch#define YESNO "(y/n [n]) " 1791556Srgrimes ask = 0; 18092935Sobrien if (nflg) { 18192935Sobrien if (vflg) 18292935Sobrien printf("%s not overwritten\n", to); 18392935Sobrien return (0); 18492935Sobrien } else if (iflg) { 18530106Swosch (void)fprintf(stderr, "overwrite %s? %s", to, YESNO); 1861556Srgrimes ask = 1; 1871556Srgrimes } else if (access(to, W_OK) && !stat(to, &sb)) { 1881556Srgrimes strmode(sb.st_mode, modep); 18930106Swosch (void)fprintf(stderr, "override %s%s%s/%s for %s? %s", 1901556Srgrimes modep + 1, modep[9] == ' ' ? "" : " ", 19176878Skris user_from_uid((unsigned long)sb.st_uid, 0), 19276878Skris group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO); 1931556Srgrimes ask = 1; 1941556Srgrimes } 1951556Srgrimes if (ask) { 19629933Swosch first = ch = getchar(); 19729933Swosch while (ch != '\n' && ch != EOF) 19829933Swosch ch = getchar(); 19930106Swosch if (first != 'y' && first != 'Y') { 20030106Swosch (void)fprintf(stderr, "not overwritten\n"); 2011556Srgrimes return (0); 20230106Swosch } 2031556Srgrimes } 2041556Srgrimes } 20550544Smharo if (!rename(from, to)) { 20650544Smharo if (vflg) 20750544Smharo printf("%s -> %s\n", from, to); 2081556Srgrimes return (0); 20950544Smharo } 2101556Srgrimes 21131664Seivind if (errno == EXDEV) { 21231664Seivind struct statfs sfs; 21377409Simp char path[PATH_MAX]; 21431664Seivind 21531664Seivind /* Can't mv(1) a mount point. */ 21631664Seivind if (realpath(from, path) == NULL) { 21731664Seivind warnx("cannot resolve %s: %s", from, path); 21831664Seivind return (1); 21931664Seivind } 22031664Seivind if (!statfs(path, &sfs) && !strcmp(path, sfs.f_mntonname)) { 22131664Seivind warnx("cannot rename a mount point"); 22231664Seivind return (1); 22331664Seivind } 22431664Seivind } else { 2251556Srgrimes warn("rename %s to %s", from, to); 2261556Srgrimes return (1); 2271556Srgrimes } 2281556Srgrimes 2291556Srgrimes /* 2301556Srgrimes * If rename fails because we're trying to cross devices, and 2311556Srgrimes * it's a regular file, do the copy internally; otherwise, use 2321556Srgrimes * cp and rm. 2331556Srgrimes */ 23462963Sdwmalone if (lstat(from, &sb)) { 2351556Srgrimes warn("%s", from); 2361556Srgrimes return (1); 2371556Srgrimes } 2381556Srgrimes return (S_ISREG(sb.st_mode) ? 2391556Srgrimes fastcopy(from, to, &sb) : copy(from, to)); 2401556Srgrimes} 2411556Srgrimes 2421556Srgrimesint 24390110Simpfastcopy(char *from, char *to, struct stat *sbp) 2441556Srgrimes{ 2451556Srgrimes struct timeval tval[2]; 2461556Srgrimes static u_int blen; 2471556Srgrimes static char *bp; 24823525Sguido mode_t oldmode; 24990114Simp int nread, from_fd, to_fd; 2501556Srgrimes 2511556Srgrimes if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 2521556Srgrimes warn("%s", from); 2531556Srgrimes return (1); 2541556Srgrimes } 25523525Sguido if (blen < sbp->st_blksize) { 25623525Sguido if (bp != NULL) 25723525Sguido free(bp); 25876878Skris if ((bp = malloc((size_t)sbp->st_blksize)) == NULL) { 25923525Sguido blen = 0; 26023525Sguido warnx("malloc failed"); 26123525Sguido return (1); 26223525Sguido } 26323525Sguido blen = sbp->st_blksize; 26423525Sguido } 26523525Sguido while ((to_fd = 26623525Sguido open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) { 26723525Sguido if (errno == EEXIST && unlink(to) == 0) 26823525Sguido continue; 2691556Srgrimes warn("%s", to); 2701556Srgrimes (void)close(from_fd); 2711556Srgrimes return (1); 2721556Srgrimes } 27376878Skris while ((nread = read(from_fd, bp, (size_t)blen)) > 0) 27476878Skris if (write(to_fd, bp, (size_t)nread) != nread) { 2751556Srgrimes warn("%s", to); 2761556Srgrimes goto err; 2771556Srgrimes } 2781556Srgrimes if (nread < 0) { 2791556Srgrimes warn("%s", from); 2801556Srgrimeserr: if (unlink(to)) 2811556Srgrimes warn("%s: remove", to); 2821556Srgrimes (void)close(from_fd); 2831556Srgrimes (void)close(to_fd); 2841556Srgrimes return (1); 2851556Srgrimes } 2861556Srgrimes (void)close(from_fd); 2871556Srgrimes 28823525Sguido oldmode = sbp->st_mode & ALLPERMS; 28923525Sguido if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 29037245Sbde warn("%s: set owner/group (was: %lu/%lu)", to, 29137245Sbde (u_long)sbp->st_uid, (u_long)sbp->st_gid); 29223525Sguido if (oldmode & (S_ISUID | S_ISGID)) { 29323525Sguido warnx( 29423525Sguido"%s: owner/group changed; clearing suid/sgid (mode was 0%03o)", 29523525Sguido to, oldmode); 29623525Sguido sbp->st_mode &= ~(S_ISUID | S_ISGID); 29723525Sguido } 29823525Sguido } 2991556Srgrimes if (fchmod(to_fd, sbp->st_mode)) 30023525Sguido warn("%s: set mode (was: 0%03o)", to, oldmode); 30163680Ssada /* 30263680Ssada * XXX 30363680Ssada * NFS doesn't support chflags; ignore errors unless there's reason 30463680Ssada * to believe we're losing bits. (Note, this still won't be right 30563680Ssada * if the server supports flags and we were trying to *remove* flags 30663680Ssada * on a file that we copied, i.e., that we didn't create.) 30763680Ssada */ 30863680Ssada errno = 0; 30976878Skris if (fchflags(to_fd, (u_long)sbp->st_flags)) 31063680Ssada if (errno != EOPNOTSUPP || sbp->st_flags != 0) 31163680Ssada warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 3121556Srgrimes 3131556Srgrimes tval[0].tv_sec = sbp->st_atime; 3141556Srgrimes tval[1].tv_sec = sbp->st_mtime; 3151556Srgrimes tval[0].tv_usec = tval[1].tv_usec = 0; 3161556Srgrimes if (utimes(to, tval)) 3171556Srgrimes warn("%s: set times", to); 3181556Srgrimes 3191556Srgrimes if (close(to_fd)) { 3201556Srgrimes warn("%s", to); 3211556Srgrimes return (1); 3221556Srgrimes } 3231556Srgrimes 3241556Srgrimes if (unlink(from)) { 3251556Srgrimes warn("%s: remove", from); 3261556Srgrimes return (1); 3271556Srgrimes } 32850544Smharo if (vflg) 32950544Smharo printf("%s -> %s\n", from, to); 3301556Srgrimes return (0); 3311556Srgrimes} 3321556Srgrimes 3331556Srgrimesint 33490110Simpcopy(char *from, char *to) 3351556Srgrimes{ 3361556Srgrimes int pid, status; 3371556Srgrimes 33840301Sdes if ((pid = fork()) == 0) { 33998280Stjr execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to, 34079452Sbrian (char *)NULL); 3411556Srgrimes warn("%s", _PATH_CP); 3421556Srgrimes _exit(1); 3431556Srgrimes } 3441556Srgrimes if (waitpid(pid, &status, 0) == -1) { 3451556Srgrimes warn("%s: waitpid", _PATH_CP); 3461556Srgrimes return (1); 3471556Srgrimes } 3481556Srgrimes if (!WIFEXITED(status)) { 3491556Srgrimes warn("%s: did not terminate normally", _PATH_CP); 3501556Srgrimes return (1); 3511556Srgrimes } 3521556Srgrimes if (WEXITSTATUS(status)) { 3531556Srgrimes warn("%s: terminated with %d (non-zero) status", 3541556Srgrimes _PATH_CP, WEXITSTATUS(status)); 3551556Srgrimes return (1); 3561556Srgrimes } 3571556Srgrimes if (!(pid = vfork())) { 35898280Stjr execl(_PATH_RM, "mv", "-rf", "--", from, (char *)NULL); 3591556Srgrimes warn("%s", _PATH_RM); 3601556Srgrimes _exit(1); 3611556Srgrimes } 3621556Srgrimes if (waitpid(pid, &status, 0) == -1) { 3631556Srgrimes warn("%s: waitpid", _PATH_RM); 3641556Srgrimes return (1); 3651556Srgrimes } 3661556Srgrimes if (!WIFEXITED(status)) { 3671556Srgrimes warn("%s: did not terminate normally", _PATH_RM); 3681556Srgrimes return (1); 3691556Srgrimes } 3701556Srgrimes if (WEXITSTATUS(status)) { 3711556Srgrimes warn("%s: terminated with %d (non-zero) status", 3721556Srgrimes _PATH_RM, WEXITSTATUS(status)); 3731556Srgrimes return (1); 3741556Srgrimes } 3751556Srgrimes return (0); 3761556Srgrimes} 3771556Srgrimes 3781556Srgrimesvoid 37990110Simpusage(void) 3801556Srgrimes{ 38150544Smharo 38214305Swosch (void)fprintf(stderr, "%s\n%s\n", 38350544Smharo "usage: mv [-f | -i] [-v] source target", 38450544Smharo " mv [-f | -i] [-v] source ... directory"); 38550544Smharo exit(EX_USAGE); 3861556Srgrimes} 387