mv.c revision 1.30
1 /* $NetBSD: mv.c,v 1.30 2003/08/04 22:31:25 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifndef lint 41 __COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\n\ 42 The Regents of the University of California. All rights reserved.\n"); 43 #endif /* not lint */ 44 45 #ifndef lint 46 #if 0 47 static char sccsid[] = "@(#)mv.c 8.2 (Berkeley) 4/2/94"; 48 #else 49 __RCSID("$NetBSD: mv.c,v 1.30 2003/08/04 22:31:25 jschauma Exp $"); 50 #endif 51 #endif /* not lint */ 52 53 #include <sys/param.h> 54 #include <sys/time.h> 55 #include <sys/wait.h> 56 #include <sys/stat.h> 57 58 #include <err.h> 59 #include <errno.h> 60 #include <fcntl.h> 61 #include <grp.h> 62 #include <locale.h> 63 #include <pwd.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <unistd.h> 68 #include <vis.h> 69 70 #include "pathnames.h" 71 72 int fflg, iflg, vflg; 73 int stdin_ok, stdout_ok; 74 75 int copy(char *, char *); 76 int do_move(char *, char *); 77 int fastcopy(char *, char *, struct stat *); 78 void usage(void); 79 int main(int, char *[]); 80 char *printescaped(const char *); 81 82 int 83 main(int argc, char *argv[]) 84 { 85 int baselen, ch, len, rval; 86 char *p, *endp; 87 struct stat sb; 88 char path[MAXPATHLEN + 1]; 89 90 setprogname(argv[0]); 91 (void)setlocale(LC_ALL, ""); 92 93 while ((ch = getopt(argc, argv, "ifv")) != -1) 94 switch (ch) { 95 case 'i': 96 fflg = 0; 97 iflg = 1; 98 break; 99 case 'f': 100 iflg = 0; 101 fflg = 1; 102 break; 103 case 'v': 104 vflg = 1; 105 break; 106 case '?': 107 default: 108 usage(); 109 } 110 argc -= optind; 111 argv += optind; 112 113 if (argc < 2) 114 usage(); 115 116 stdin_ok = isatty(STDIN_FILENO); 117 stdout_ok = isatty(STDOUT_FILENO); 118 119 /* 120 * If the stat on the target fails or the target isn't a directory, 121 * try the move. More than 2 arguments is an error in this case. 122 */ 123 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 124 if (argc > 2) 125 usage(); 126 exit(do_move(argv[0], argv[1])); 127 } 128 129 /* It's a directory, move each file into it. */ 130 (void)strlcpy(path, argv[argc - 1], sizeof(path)); 131 baselen = strlen(path); 132 endp = &path[baselen]; 133 *endp++ = '/'; 134 ++baselen; 135 for (rval = 0; --argc; ++argv) { 136 p = *argv + strlen(*argv) - 1; 137 while (*p == '/' && p != *argv) 138 *p-- = '\0'; 139 if ((p = strrchr(*argv, '/')) == NULL) 140 p = *argv; 141 else 142 ++p; 143 144 if ((baselen + (len = strlen(p))) >= MAXPATHLEN) { 145 char *fn = printescaped(*argv); 146 warnx("%s: destination pathname too long", fn); 147 free(fn); 148 rval = 1; 149 } else { 150 memmove(endp, p, len + 1); 151 if (do_move(*argv, path)) 152 rval = 1; 153 } 154 } 155 exit(rval); 156 /* NOTREACHED */ 157 } 158 159 int 160 do_move(char *from, char *to) 161 { 162 struct stat sb; 163 char modep[15]; 164 char *fn, *tn; 165 166 fn = printescaped(from); 167 tn = printescaped(to); 168 169 /* 170 * (1) If the destination path exists, the -f option is not specified 171 * and either of the following conditions are true: 172 * 173 * (a) The permissions of the destination path do not permit 174 * writing and the standard input is a terminal. 175 * (b) The -i option is specified. 176 * 177 * the mv utility shall write a prompt to standard error and 178 * read a line from standard input. If the response is not 179 * affirmative, mv shall do nothing more with the current 180 * source file... 181 */ 182 if (!fflg && !access(to, F_OK)) { 183 int ask = 1; 184 int ch; 185 186 if (iflg) { 187 if (access(from, F_OK)) { 188 warn("rename %s", fn); 189 free(fn); 190 free(tn); 191 return (1); 192 } 193 (void)fprintf(stderr, "overwrite %s? ", tn); 194 } else if (stdin_ok && access(to, W_OK) && !stat(to, &sb)) { 195 if (access(from, F_OK)) { 196 warn("rename %s", fn); 197 free(fn); 198 free(tn); 199 return (1); 200 } 201 strmode(sb.st_mode, modep); 202 (void)fprintf(stderr, "override %s%s%s/%s for %s? ", 203 modep + 1, modep[9] == ' ' ? "" : " ", 204 user_from_uid(sb.st_uid, 0), 205 group_from_gid(sb.st_gid, 0), tn); 206 } else 207 ask = 0; 208 if (ask) { 209 if ((ch = getchar()) != EOF && ch != '\n') 210 while (getchar() != '\n'); 211 if (ch != 'y' && ch != 'Y') { 212 free(fn); 213 free(tn); 214 return (0); 215 } 216 } 217 } 218 219 /* 220 * (2) If rename() succeeds, mv shall do nothing more with the 221 * current source file. If it fails for any other reason than 222 * EXDEV, mv shall write a diagnostic message to the standard 223 * error and do nothing more with the current source file. 224 * 225 * (3) If the destination path exists, and it is a file of type 226 * directory and source_file is not a file of type directory, 227 * or it is a file not of type directory, and source file is 228 * a file of type directory, mv shall write a diagnostic 229 * message to standard error, and do nothing more with the 230 * current source file... 231 */ 232 if (!rename(from, to)) { 233 if (vflg) 234 printf("%s -> %s\n", fn, tn); 235 free(fn); 236 free(tn); 237 return (0); 238 } 239 240 if (errno != EXDEV) { 241 warn("rename %s to %s", fn, tn); 242 free(fn); 243 free(tn); 244 return (1); 245 } 246 247 /* 248 * (4) If the destination path exists, mv shall attempt to remove it. 249 * If this fails for any reason, mv shall write a diagnostic 250 * message to the standard error and do nothing more with the 251 * current source file... 252 */ 253 if (!lstat(to, &sb)) { 254 if ((S_ISDIR(sb.st_mode)) ? rmdir(to) : unlink(to)) { 255 warn("can't remove %s", tn); 256 free(fn); 257 free(tn); 258 return (1); 259 } 260 } 261 262 /* 263 * (5) The file hierarchy rooted in source_file shall be duplicated 264 * as a file hierarchy rooted in the destination path... 265 */ 266 if (lstat(from, &sb)) { 267 warn("%s", fn); 268 free(fn); 269 free(tn); 270 return (1); 271 } 272 273 free(fn); 274 free(tn); 275 276 return (S_ISREG(sb.st_mode) ? 277 fastcopy(from, to, &sb) : copy(from, to)); 278 } 279 280 int 281 fastcopy(char *from, char *to, struct stat *sbp) 282 { 283 struct timeval tval[2]; 284 static u_int blen; 285 static char *bp; 286 int nread, from_fd, to_fd; 287 char *fn, *tn; 288 289 fn = printescaped(from); 290 tn = printescaped(to); 291 292 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 293 warn("%s", fn); 294 free(fn); 295 free(tn); 296 return (1); 297 } 298 if ((to_fd = 299 open(to, O_CREAT | O_TRUNC | O_WRONLY, sbp->st_mode)) < 0) { 300 warn("%s", tn); 301 free(fn); 302 free(tn); 303 (void)close(from_fd); 304 return (1); 305 } 306 if (!blen && !(bp = malloc(blen = sbp->st_blksize))) { 307 warn(NULL); 308 free(fn); 309 free(tn); 310 return (1); 311 } 312 while ((nread = read(from_fd, bp, blen)) > 0) 313 if (write(to_fd, bp, nread) != nread) { 314 warn("%s", tn); 315 goto err; 316 } 317 if (nread < 0) { 318 warn("%s", fn); 319 err: if (unlink(to)) 320 warn("%s: remove", tn); 321 (void)close(from_fd); 322 (void)close(to_fd); 323 free(fn); 324 free(tn); 325 return (1); 326 } 327 (void)close(from_fd); 328 #ifdef BSD4_4 329 TIMESPEC_TO_TIMEVAL(&tval[0], &sbp->st_atimespec); 330 TIMESPEC_TO_TIMEVAL(&tval[1], &sbp->st_mtimespec); 331 #else 332 tval[0].tv_sec = sbp->st_atime; 333 tval[1].tv_sec = sbp->st_mtime; 334 tval[0].tv_usec = 0; 335 tval[1].tv_usec = 0; 336 #endif 337 #ifdef __SVR4 338 if (utimes(to, tval)) 339 #else 340 if (futimes(to_fd, tval)) 341 #endif 342 warn("%s: set times", tn); 343 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 344 if (errno != EPERM) 345 warn("%s: set owner/group", tn); 346 sbp->st_mode &= ~(S_ISUID | S_ISGID); 347 } 348 if (fchmod(to_fd, sbp->st_mode)) 349 warn("%s: set mode", tn); 350 if (fchflags(to_fd, sbp->st_flags) && (errno != EOPNOTSUPP)) 351 warn("%s: set flags (was: 0%07o)", tn, sbp->st_flags); 352 353 if (close(to_fd)) { 354 warn("%s", tn); 355 free(fn); 356 free(tn); 357 return (1); 358 } 359 360 if (unlink(from)) { 361 warn("%s: remove", fn); 362 free(fn); 363 free(tn); 364 return (1); 365 } 366 367 if (vflg) 368 printf("%s -> %s\n", fn, tn); 369 370 free(fn); 371 free(tn); 372 return (0); 373 } 374 375 int 376 copy(char *from, char *to) 377 { 378 int pid, status; 379 380 if ((pid = vfork()) == 0) { 381 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", from, to, NULL); 382 warn("%s", _PATH_CP); 383 _exit(1); 384 } 385 if (waitpid(pid, &status, 0) == -1) { 386 warn("%s: waitpid", _PATH_CP); 387 return (1); 388 } 389 if (!WIFEXITED(status)) { 390 warn("%s: did not terminate normally", _PATH_CP); 391 return (1); 392 } 393 if (WEXITSTATUS(status)) { 394 warn("%s: terminated with %d (non-zero) status", 395 _PATH_CP, WEXITSTATUS(status)); 396 return (1); 397 } 398 if (!(pid = vfork())) { 399 execl(_PATH_RM, "mv", "-rf", from, NULL); 400 warn("%s", _PATH_RM); 401 _exit(1); 402 } 403 if (waitpid(pid, &status, 0) == -1) { 404 warn("%s: waitpid", _PATH_RM); 405 return (1); 406 } 407 if (!WIFEXITED(status)) { 408 warn("%s: did not terminate normally", _PATH_RM); 409 return (1); 410 } 411 if (WEXITSTATUS(status)) { 412 warn("%s: terminated with %d (non-zero) status", 413 _PATH_RM, WEXITSTATUS(status)); 414 return (1); 415 } 416 return (0); 417 } 418 419 void 420 usage(void) 421 { 422 (void)fprintf(stderr, "usage: %s [-fiv] source target\n" 423 " %s [-fiv] source ... directory\n", getprogname(), 424 getprogname()); 425 exit(1); 426 /* NOTREACHED */ 427 } 428 429 char * 430 printescaped(const char *src) 431 { 432 size_t len; 433 char *retval; 434 435 len = strlen(src); 436 if (len != 0 && SIZE_T_MAX/len <= 4) { 437 errx(EXIT_FAILURE, "%s: name too long", src); 438 /* NOTREACHED */ 439 } 440 441 retval = (char *)malloc(4*len+1); 442 if (retval != NULL) { 443 if (stdout_ok) 444 (void)strvis(retval, src, VIS_NL | VIS_CSTYLE); 445 else 446 (void)strcpy(retval, src); 447 return retval; 448 } else 449 errx(EXIT_FAILURE, "out of memory!"); 450 /* NOTREACHED */ 451 } 452
Indexes created Fri Oct 03 17:10:05 GMT 2025