diff --git a/bin/mv/mv.c b/bin/mv/mv.c index 8aea4bbf567c..c3080112cee5 100644 --- a/bin/mv/mv.c +++ b/bin/mv/mv.c @@ -1,501 +1,502 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1989, 1993, 1994 * 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. 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* Exit code for a failed exec. */ #define EXEC_FAILED 127 static int fflg, hflg, iflg, nflg, vflg; static int copy(const char *, const char *); static int do_move(const char *, const char *); static int fastcopy(const char *, const char *, struct stat *); static void usage(void); static void preserve_fd_acls(int source_fd, int dest_fd, const char *source_path, const char *dest_path); int main(int argc, char *argv[]) { size_t baselen, len; int rval; char *p, *endp; struct stat sb; int ch; char path[PATH_MAX]; while ((ch = getopt(argc, argv, "fhinv")) != -1) switch (ch) { case 'h': hflg = 1; break; case 'i': iflg = 1; fflg = nflg = 0; break; case 'f': fflg = 1; iflg = nflg = 0; break; case 'n': nflg = 1; fflg = iflg = 0; break; case 'v': vflg = 1; break; default: usage(); } 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) errx(1, "%s is not a directory", argv[argc - 1]); exit(do_move(argv[0], argv[1])); } /* * If -h was specified, treat the target as a symlink instead of * directory. */ if (hflg) { if (argc > 2) usage(); if (lstat(argv[1], &sb) == 0 && S_ISLNK(sb.st_mode)) exit(do_move(argv[0], argv[1])); } /* It's a directory, move each file into it. */ if (strlen(argv[argc - 1]) > sizeof(path) - 1) errx(1, "%s: destination pathname too long", *argv); (void)strcpy(path, argv[argc - 1]); baselen = strlen(path); endp = &path[baselen]; if (!baselen || *(endp - 1) != '/') { *endp++ = '/'; ++baselen; } for (rval = 0; --argc; ++argv) { /* * Find the last component of the source pathname. It * may have trailing slashes. */ p = *argv + strlen(*argv); while (p != *argv && p[-1] == '/') --p; while (p != *argv && p[-1] != '/') --p; if ((baselen + (len = strlen(p))) >= PATH_MAX) { warnx("%s: destination pathname too long", *argv); rval = 1; } else { memmove(endp, p, (size_t)len + 1); if (do_move(*argv, path)) rval = 1; } } exit(rval); } static int do_move(const char *from, const char *to) { struct stat sb; int ask, ch, first; char modep[15]; /* * 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)) { /* prompt only if source exists */ if (lstat(from, &sb) == -1) { warn("%s", from); return (1); } #define YESNO "(y/n [n]) " ask = 0; if (nflg) { if (vflg) printf("%s not overwritten\n", to); return (0); } else if (iflg) { (void)fprintf(stderr, "overwrite %s? %s", to, YESNO); ask = 1; } else if (access(to, W_OK) && !stat(to, &sb) && isatty(STDIN_FILENO)) { strmode(sb.st_mode, modep); (void)fprintf(stderr, "override %s%s%s/%s for %s? %s", modep + 1, modep[9] == ' ' ? "" : " ", user_from_uid((unsigned long)sb.st_uid, 0), group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO); ask = 1; } if (ask) { first = ch = getchar(); while (ch != '\n' && ch != EOF) ch = getchar(); if (first != 'y' && first != 'Y') { (void)fprintf(stderr, "not overwritten\n"); return (0); } } } /* * Rename on FreeBSD will fail with EISDIR and ENOTDIR, before failing * with EXDEV. Therefore, copy() doesn't have to perform the checks * specified in the Step 3 of the POSIX mv specification. */ if (!rename(from, to)) { if (vflg) printf("%s -> %s\n", from, to); return (0); } if (errno == EXDEV) { struct statfs sfs; char path[PATH_MAX]; /* * If the source is a symbolic link and is on another * filesystem, it can be recreated at the destination. */ if (lstat(from, &sb) == -1) { warn("%s", from); return (1); } if (!S_ISLNK(sb.st_mode)) { /* Can't mv(1) a mount point. */ if (realpath(from, path) == NULL) { warn("cannot resolve %s: %s", from, path); return (1); } if (!statfs(path, &sfs) && !strcmp(path, sfs.f_mntonname)) { warnx("cannot rename a mount point"); return (1); } } } else { warn("rename %s to %s", from, to); return (1); } /* * If rename fails because we're trying to cross devices, and * it's a regular file, do the copy internally; otherwise, use * cp and rm. */ if (lstat(from, &sb)) { warn("%s", from); return (1); } return (S_ISREG(sb.st_mode) ? fastcopy(from, to, &sb) : copy(from, to)); } static int fastcopy(const char *from, const char *to, struct stat *sbp) { struct timespec ts[2]; - static u_int blen = MAXPHYS; + struct stat tsb; static char *bp = NULL; + static size_t blen = MAXPHYS; + ssize_t nread; + int from_fd, to_fd; mode_t oldmode; - int nread, from_fd, to_fd; - struct stat tsb; if ((from_fd = open(from, O_RDONLY, 0)) < 0) { warn("fastcopy: open() failed (from): %s", from); return (1); } - if (bp == NULL && (bp = malloc((size_t)blen)) == NULL) { - warnx("malloc(%u) failed", blen); + if (bp == NULL && (bp = malloc(blen)) == NULL) { + warnx("malloc(%zu) failed", blen); (void)close(from_fd); return (1); } while ((to_fd = open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) { if (errno == EEXIST && unlink(to) == 0) continue; warn("fastcopy: open() failed (to): %s", to); (void)close(from_fd); return (1); } - while ((nread = read(from_fd, bp, (size_t)blen)) > 0) + while ((nread = read(from_fd, bp, blen)) > 0) if (write(to_fd, bp, (size_t)nread) != nread) { warn("fastcopy: write() failed: %s", to); goto err; } if (nread < 0) { warn("fastcopy: read() failed: %s", from); err: if (unlink(to)) warn("%s: remove", to); (void)close(from_fd); (void)close(to_fd); return (1); } oldmode = sbp->st_mode & ALLPERMS; if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { warn("%s: set owner/group (was: %lu/%lu)", to, (u_long)sbp->st_uid, (u_long)sbp->st_gid); if (oldmode & (S_ISUID | S_ISGID)) { warnx( "%s: owner/group changed; clearing suid/sgid (mode was 0%03o)", to, oldmode); sbp->st_mode &= ~(S_ISUID | S_ISGID); } } if (fchmod(to_fd, sbp->st_mode)) warn("%s: set mode (was: 0%03o)", to, oldmode); /* * POSIX 1003.2c states that if _POSIX_ACL_EXTENDED is in effect * for dest_file, then its ACLs shall reflect the ACLs of the * source_file. */ preserve_fd_acls(from_fd, to_fd, from, to); (void)close(from_fd); ts[0] = sbp->st_atim; ts[1] = sbp->st_mtim; if (futimens(to_fd, ts)) warn("%s: set times", to); /* * XXX * NFS doesn't support chflags; ignore errors unless there's reason * to believe we're losing bits. (Note, this still won't be right * if the server supports flags and we were trying to *remove* flags * on a file that we copied, i.e., that we didn't create.) */ if (fstat(to_fd, &tsb) == 0) { if ((sbp->st_flags & ~UF_ARCHIVE) != (tsb.st_flags & ~UF_ARCHIVE)) { if (fchflags(to_fd, sbp->st_flags | (tsb.st_flags & UF_ARCHIVE))) if (errno != EOPNOTSUPP || ((sbp->st_flags & ~UF_ARCHIVE) != 0)) warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); } } else warn("%s: cannot stat", to); if (close(to_fd)) { warn("%s", to); return (1); } if (unlink(from)) { warn("%s: remove", from); return (1); } if (vflg) printf("%s -> %s\n", from, to); return (0); } static int copy(const char *from, const char *to) { struct stat sb; int pid, status; if (lstat(to, &sb) == 0) { /* Destination path exists. */ if (S_ISDIR(sb.st_mode)) { if (rmdir(to) != 0) { warn("rmdir %s", to); return (1); } } else { if (unlink(to) != 0) { warn("unlink %s", to); return (1); } } } else if (errno != ENOENT) { warn("%s", to); return (1); } /* Copy source to destination. */ if (!(pid = vfork())) { execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to, (char *)NULL); _exit(EXEC_FAILED); } if (waitpid(pid, &status, 0) == -1) { warn("%s %s %s: waitpid", _PATH_CP, from, to); return (1); } if (!WIFEXITED(status)) { warnx("%s %s %s: did not terminate normally", _PATH_CP, from, to); return (1); } switch (WEXITSTATUS(status)) { case 0: break; case EXEC_FAILED: warnx("%s %s %s: exec failed", _PATH_CP, from, to); return (1); default: warnx("%s %s %s: terminated with %d (non-zero) status", _PATH_CP, from, to, WEXITSTATUS(status)); return (1); } /* Delete the source. */ if (!(pid = vfork())) { execl(_PATH_RM, "mv", "-rf", "--", from, (char *)NULL); _exit(EXEC_FAILED); } if (waitpid(pid, &status, 0) == -1) { warn("%s %s: waitpid", _PATH_RM, from); return (1); } if (!WIFEXITED(status)) { warnx("%s %s: did not terminate normally", _PATH_RM, from); return (1); } switch (WEXITSTATUS(status)) { case 0: break; case EXEC_FAILED: warnx("%s %s: exec failed", _PATH_RM, from); return (1); default: warnx("%s %s: terminated with %d (non-zero) status", _PATH_RM, from, WEXITSTATUS(status)); return (1); } return (0); } static void preserve_fd_acls(int source_fd, int dest_fd, const char *source_path, const char *dest_path) { acl_t acl; acl_type_t acl_type; int acl_supported = 0, ret, trivial; ret = fpathconf(source_fd, _PC_ACL_NFS4); if (ret > 0 ) { acl_supported = 1; acl_type = ACL_TYPE_NFS4; } else if (ret < 0 && errno != EINVAL) { warn("fpathconf(..., _PC_ACL_NFS4) failed for %s", source_path); return; } if (acl_supported == 0) { ret = fpathconf(source_fd, _PC_ACL_EXTENDED); if (ret > 0 ) { acl_supported = 1; acl_type = ACL_TYPE_ACCESS; } else if (ret < 0 && errno != EINVAL) { warn("fpathconf(..., _PC_ACL_EXTENDED) failed for %s", source_path); return; } } if (acl_supported == 0) return; acl = acl_get_fd_np(source_fd, acl_type); if (acl == NULL) { warn("failed to get acl entries for %s", source_path); return; } if (acl_is_trivial_np(acl, &trivial)) { warn("acl_is_trivial() failed for %s", source_path); acl_free(acl); return; } if (trivial) { acl_free(acl); return; } if (acl_set_fd_np(dest_fd, acl, acl_type) < 0) { warn("failed to set acl entries for %s", dest_path); acl_free(acl); return; } acl_free(acl); } static void usage(void) { (void)fprintf(stderr, "%s\n%s\n", "usage: mv [-f | -i | -n] [-hv] source target", " mv [-f | -i | -n] [-v] source ... directory"); exit(EX_USAGE); }