1 /* $NetBSD: mv.c,v 1.34 2004/01/04 16:04:18 jschauma Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ken Smith of The State University of New York at Buffalo. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 __COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\n\ 38 The Regents of the University of California. All rights reserved.\n"); 39 #endif /* not lint */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94"; 44 #else 45 __RCSID("$NetBSD: mv.c,v 1.34 2004/01/04 16:04:18 jschauma Exp $"); 46 #endif 47 #endif /* not lint */ 48 49 #include <sys/param.h> 50 #include <sys/time.h> 51 #include <sys/wait.h> 52 #include <sys/stat.h> 53 54 #include <err.h> 55 #include <errno.h> 56 #include <fcntl.h> 57 #include <grp.h> 58 #include <locale.h> 59 #include <pwd.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 #include "pathnames.h" 66 67 int fflg, iflg, vflg; 68 int stdin_ok; 69 70 int copy(char *, char *); 71 int do_move(char *, char *); 72 int fastcopy(char *, char *, struct stat *); 73 void usage(void); 74 int main(int, char *[]); 75 76 int 77 main(int argc, char *argv[]) 78 { 79 int baselen, ch, len, rval; 80 char *p, *endp; 81 struct stat sb; 82 char path[MAXPATHLEN + 1]; 83 84 setprogname(argv[0]); 85 (void)setlocale(LC_ALL, ""); 86 87 while ((ch = getopt(argc, argv, "ifv")) != -1) 88 switch (ch) { 89 case 'i': 90 fflg = 0; 91 iflg = 1; 92 break; 93 case 'f': 94 iflg = 0; 95 fflg = 1; 96 break; 97 case 'v': 98 vflg = 1; 99 break; 100 case '?': 101 default: 102 usage(); 103 } 104 argc -= optind; 105 argv += optind; 106 107 if (argc < 2) 108 usage(); 109 110 stdin_ok = isatty(STDIN_FILENO); 111 112 /* 113 * If the stat on the target fails or the target isn't a directory, 114 * try the move. More than 2 arguments is an error in this case. 115 */ 116 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 117 if (argc > 2) 118 usage(); 119 exit(do_move(argv[0], argv[1])); 120 } 121 122 /* It's a directory, move each file into it. */ 123 (void)strlcpy(path, argv[argc - 1], sizeof(path)); 124 baselen = strlen(path); 125 endp = &path[baselen]; 126 *endp++ = '/'; 127 ++baselen; 128 for (rval = 0; --argc; ++argv) { 129 p = *argv + strlen(*argv) - 1; 130 while (*p == '/' && p != *argv) 131 *p-- = '\0'; 132 if ((p = strrchr(*argv, '/')) == NULL) 133 p = *argv; 134 else 135 ++p; 136 137 if ((baselen + (len = strlen(p))) >= MAXPATHLEN) { 138 warnx("%s: destination pathname too long", *argv); 139 rval = 1; 140 } else { 141 memmove(endp, p, len + 1); 142 if (do_move(*argv, path)) 143 rval = 1; 144 } 145 } 146 exit(rval); 147 /* NOTREACHED */ 148 } 149 150 int 151 do_move(char *from, char *to) 152 { 153 struct stat sb; 154 char modep[15]; 155 156 /* 157 * (1) If the destination path exists, the -f option is not specified 158 * and either of the following conditions are true: 159 * 160 * (a) The permissions of the destination path do not permit 161 * writing and the standard input is a terminal. 162 * (b) The -i option is specified. 163 * 164 * the mv utility shall write a prompt to standard error and 165 * read a line from standard input. If the response is not 166 * affirmative, mv shall do nothing more with the current 167 * source file... 168 */ 169 if (!fflg && !access(to, F_OK)) { 170 int ask = 1; 171 int ch; 172 173 if (iflg) { 174 if (access(from, F_OK)) { 175 warn("rename %s", from); 176 return (1); 177 } 178 (void)fprintf(stderr, "overwrite %s? ", to); 179 } else if (stdin_ok && access(to, W_OK) && !stat(to, &sb)) { 180 if (access(from, F_OK)) { 181 warn("rename %s", from); 182 return (1); 183 } 184 strmode(sb.st_mode, modep); 185 (void)fprintf(stderr, "override %s%s%s/%s for %s? ", 186 modep + 1, modep[9] == ' ' ? "" : " ", 187 user_from_uid(sb.st_uid, 0), 188 group_from_gid(sb.st_gid, 0), to); 189 } else 190 ask = 0; 191 if (ask) { 192 if ((ch = getchar()) != EOF && ch != '\n') 193 while (getchar() != '\n'); 194 if (ch != 'y' && ch != 'Y') 195 return (0); 196 } 197 } 198 199 /* 200 * (2) If rename() succeeds, mv shall do nothing more with the 201 * current source file. If it fails for any other reason than 202 * EXDEV, mv shall write a diagnostic message to the standard 203 * error and do nothing more with the current source file. 204 * 205 * (3) If the destination path exists, and it is a file of type 206 * directory and source_file is not a file of type directory, 207 * or it is a file not of type directory, and source file is 208 * a file of type directory, mv shall write a diagnostic 209 * message to standard error, and do nothing more with the 210 * current source file... 211 */ 212 if (!rename(from, to)) { 213 if (vflg) 214 printf("%s -> %s\n", from, to); 215 return (0); 216 } 217 218 if (errno != EXDEV) { 219 warn("rename %s to %s", from, to); 220 return (1); 221 } 222 223 /* 224 * (4) If the destination path exists, mv shall attempt to remove it. 225 * If this fails for any reason, mv shall write a diagnostic 226 * message to the standard error and do nothing more with the 227 * current source file... 228 */ 229 if (!lstat(to, &sb)) { 230 if ((S_ISDIR(sb.st_mode)) ? rmdir(to) : unlink(to)) { 231 warn("can't remove %s", to); 232 return (1); 233 } 234 } 235 236 /* 237 * (5) The file hierarchy rooted in source_file shall be duplicated 238 * as a file hierarchy rooted in the destination path... 239 */ 240 if (lstat(from, &sb)) { 241 warn("%s", from); 242 return (1); 243 } 244 245 return (S_ISREG(sb.st_mode) ? 246 fastcopy(from, to, &sb) : copy(from, to)); 247 } 248 249 int 250 fastcopy(char *from, char *to, struct stat *sbp) 251 { 252 struct timeval tval[2]; 253 static u_int blen; 254 static char *bp; 255 int nread, from_fd, to_fd; 256 257 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 258 warn("%s", from); 259 return (1); 260 } 261 if ((to_fd = 262 open(to, O_CREAT | O_TRUNC | O_WRONLY, sbp->st_mode)) < 0) { 263 warn("%s", to); 264 (void)close(from_fd); 265 return (1); 266 } 267 if (!blen && !(bp = malloc(blen = sbp->st_blksize))) { 268 warn(NULL); 269 return (1); 270 } 271 while ((nread = read(from_fd, bp, blen)) > 0) 272 if (write(to_fd, bp, nread) != nread) { 273 warn("%s", to); 274 goto err; 275 } 276 if (nread < 0) { 277 warn("%s", from); 278 err: if (unlink(to)) 279 warn("%s: remove", to); 280 (void)close(from_fd); 281 (void)close(to_fd); 282 return (1); 283 } 284 (void)close(from_fd); 285 #ifdef BSD4_4 286 TIMESPEC_TO_TIMEVAL(&tval[0], &sbp->st_atimespec); 287 TIMESPEC_TO_TIMEVAL(&tval[1], &sbp->st_mtimespec); 288 #else 289 tval[0].tv_sec = sbp->st_atime; 290 tval[1].tv_sec = sbp->st_mtime; 291 tval[0].tv_usec = 0; 292 tval[1].tv_usec = 0; 293 #endif 294 #ifdef __SVR4 295 if (utimes(to, tval)) 296 #else 297 if (futimes(to_fd, tval)) 298 #endif 299 warn("%s: set times", to); 300 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 301 if (errno != EPERM) 302 warn("%s: set owner/group", to); 303 sbp->st_mode &= ~(S_ISUID | S_ISGID); 304 } 305 if (fchmod(to_fd, sbp->st_mode)) 306 warn("%s: set mode", to); 307 if (fchflags(to_fd, sbp->st_flags) && (errno != EOPNOTSUPP)) 308 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 309 310 if (close(to_fd)) { 311 warn("%s", to); 312 return (1); 313 } 314 315 if (unlink(from)) { 316 warn("%s: remove", from); 317 return (1); 318 } 319 320 if (vflg) 321 printf("%s -> %s\n", from, to); 322 323 return (0); 324 } 325 326 int 327 copy(char *from, char *to) 328 { 329 int pid, status; 330 331 if ((pid = vfork()) == 0) { 332 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", from, to, NULL); 333 warn("%s", _PATH_CP); 334 _exit(1); 335 } 336 if (waitpid(pid, &status, 0) == -1) { 337 warn("%s: waitpid", _PATH_CP); 338 return (1); 339 } 340 if (!WIFEXITED(status)) { 341 warn("%s: did not terminate normally", _PATH_CP); 342 return (1); 343 } 344 if (WEXITSTATUS(status)) { 345 warn("%s: terminated with %d (non-zero) status", 346 _PATH_CP, WEXITSTATUS(status)); 347 return (1); 348 } 349 if (!(pid = vfork())) { 350 execl(_PATH_RM, "mv", "-rf", from, NULL); 351 warn("%s", _PATH_RM); 352 _exit(1); 353 } 354 if (waitpid(pid, &status, 0) == -1) { 355 warn("%s: waitpid", _PATH_RM); 356 return (1); 357 } 358 if (!WIFEXITED(status)) { 359 warn("%s: did not terminate normally", _PATH_RM); 360 return (1); 361 } 362 if (WEXITSTATUS(status)) { 363 warn("%s: terminated with %d (non-zero) status", 364 _PATH_RM, WEXITSTATUS(status)); 365 return (1); 366 } 367 return (0); 368 } 369 370 void 371 usage(void) 372 { 373 (void)fprintf(stderr, "usage: %s [-fiv] source target\n" 374 " %s [-fiv] source ... directory\n", getprogname(), 375 getprogname()); 376 exit(1); 377 /* NOTREACHED */ 378 } 379