mv.c revision 1.43.22.2
1 /* $NetBSD: mv.c,v 1.43.22.2 2016/03/06 18:40:09 martin 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\ 38 The Regents of the University of California. All rights reserved."); 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 1.43.22.2 2016/03/06 18:40:09 martin 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 #include <sys/extattr.h> 54 55 #include <err.h> 56 #include <errno.h> 57 #include <fcntl.h> 58 #include <grp.h> 59 #include <locale.h> 60 #include <pwd.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <unistd.h> 65 66 #include "pathnames.h" 67 68 static int fflg, iflg, vflg; 69 static int stdin_ok; 70 static sig_atomic_t pinfo; 71 72 static int copy(char *, char *); 73 static int do_move(char *, char *); 74 static int fastcopy(char *, char *, struct stat *); 75 __dead static void usage(void); 76 77 static void 78 progress(int sig __unused) 79 { 80 81 pinfo++; 82 } 83 84 int 85 main(int argc, char *argv[]) 86 { 87 int ch, len, rval; 88 char *p, *endp; 89 struct stat sb; 90 char path[MAXPATHLEN + 1]; 91 size_t baselen; 92 93 setprogname(argv[0]); 94 (void)setlocale(LC_ALL, ""); 95 96 while ((ch = getopt(argc, argv, "ifv")) != -1) 97 switch (ch) { 98 case 'i': 99 fflg = 0; 100 iflg = 1; 101 break; 102 case 'f': 103 iflg = 0; 104 fflg = 1; 105 break; 106 case 'v': 107 vflg = 1; 108 break; 109 default: 110 usage(); 111 } 112 argc -= optind; 113 argv += optind; 114 115 if (argc < 2) 116 usage(); 117 118 stdin_ok = isatty(STDIN_FILENO); 119 120 (void)signal(SIGINFO, progress); 121 122 /* 123 * If the stat on the target fails or the target isn't a directory, 124 * try the move. More than 2 arguments is an error in this case. 125 */ 126 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 127 if (argc > 2) 128 usage(); 129 exit(do_move(argv[0], argv[1])); 130 } 131 132 /* It's a directory, move each file into it. */ 133 baselen = strlcpy(path, argv[argc - 1], sizeof(path)); 134 if (baselen >= sizeof(path)) 135 errx(1, "%s: destination pathname too long", argv[argc - 1]); 136 endp = &path[baselen]; 137 if (!baselen || *(endp - 1) != '/') { 138 *endp++ = '/'; 139 ++baselen; 140 } 141 for (rval = 0; --argc; ++argv) { 142 p = *argv + strlen(*argv) - 1; 143 while (*p == '/' && p != *argv) 144 *p-- = '\0'; 145 if ((p = strrchr(*argv, '/')) == NULL) 146 p = *argv; 147 else 148 ++p; 149 150 if ((baselen + (len = strlen(p))) >= MAXPATHLEN) { 151 warnx("%s: destination pathname too long", *argv); 152 rval = 1; 153 } else { 154 memmove(endp, p, len + 1); 155 if (do_move(*argv, path)) 156 rval = 1; 157 } 158 } 159 exit(rval); 160 /* NOTREACHED */ 161 } 162 163 static int 164 do_move(char *from, char *to) 165 { 166 struct stat sb; 167 char modep[15]; 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", from); 189 return (1); 190 } 191 (void)fprintf(stderr, "overwrite %s? ", to); 192 } else if (stdin_ok && access(to, W_OK) && !stat(to, &sb)) { 193 if (access(from, F_OK)) { 194 warn("rename %s", from); 195 return (1); 196 } 197 strmode(sb.st_mode, modep); 198 (void)fprintf(stderr, "override %s%s%s/%s for %s? ", 199 modep + 1, modep[9] == ' ' ? "" : " ", 200 user_from_uid(sb.st_uid, 0), 201 group_from_gid(sb.st_gid, 0), to); 202 } else 203 ask = 0; 204 if (ask) { 205 if ((ch = getchar()) != EOF && ch != '\n') { 206 int ch2; 207 while ((ch2 = getchar()) != EOF && ch2 != '\n') 208 continue; 209 } 210 if (ch != 'y' && ch != 'Y') 211 return (0); 212 } 213 } 214 215 /* 216 * (2) If rename() succeeds, mv shall do nothing more with the 217 * current source file. If it fails for any other reason than 218 * EXDEV, mv shall write a diagnostic message to the standard 219 * error and do nothing more with the current source file. 220 * 221 * (3) If the destination path exists, and it is a file of type 222 * directory and source_file is not a file of type directory, 223 * or it is a file not of type directory, and source file is 224 * a file of type directory, mv shall write a diagnostic 225 * message to standard error, and do nothing more with the 226 * current source file... 227 */ 228 if (!rename(from, to)) { 229 if (vflg) 230 printf("%s -> %s\n", from, to); 231 return (0); 232 } 233 234 if (errno != EXDEV) { 235 warn("rename %s to %s", from, to); 236 return (1); 237 } 238 239 /* 240 * (4) If the destination path exists, mv shall attempt to remove it. 241 * If this fails for any reason, mv shall write a diagnostic 242 * message to the standard error and do nothing more with the 243 * current source file... 244 */ 245 if (!lstat(to, &sb)) { 246 if ((S_ISDIR(sb.st_mode)) ? rmdir(to) : unlink(to)) { 247 warn("can't remove %s", to); 248 return (1); 249 } 250 } 251 252 /* 253 * (5) The file hierarchy rooted in source_file shall be duplicated 254 * as a file hierarchy rooted in the destination path... 255 */ 256 if (lstat(from, &sb)) { 257 warn("%s", from); 258 return (1); 259 } 260 261 return (S_ISREG(sb.st_mode) ? 262 fastcopy(from, to, &sb) : copy(from, to)); 263 } 264 265 static int 266 fastcopy(char *from, char *to, struct stat *sbp) 267 { 268 #if defined(__NetBSD__) 269 struct timespec ts[2]; 270 #else 271 struct timeval tval[2]; 272 #endif 273 static blksize_t blen; 274 static char *bp; 275 int from_fd, to_fd; 276 ssize_t nread; 277 off_t total = 0; 278 279 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 280 warn("%s", from); 281 return (1); 282 } 283 if ((to_fd = 284 open(to, O_CREAT | O_TRUNC | O_WRONLY, sbp->st_mode)) < 0) { 285 warn("%s", to); 286 (void)close(from_fd); 287 return (1); 288 } 289 if (!blen && !(bp = malloc(blen = sbp->st_blksize))) { 290 warn(NULL); 291 blen = 0; 292 (void)close(from_fd); 293 (void)close(to_fd); 294 return (1); 295 } 296 while ((nread = read(from_fd, bp, blen)) > 0) { 297 if (write(to_fd, bp, nread) != nread) { 298 warn("%s", to); 299 goto err; 300 } 301 total += nread; 302 if (pinfo) { 303 int pcent = (int)((100.0 * total) / sbp->st_size); 304 305 pinfo = 0; 306 (void)fprintf(stderr, "%s => %s %llu/%llu bytes %d%% " 307 "written\n", from, to, (unsigned long long)total, 308 (unsigned long long)sbp->st_size, pcent); 309 } 310 } 311 if (nread < 0) { 312 warn("%s", from); 313 err: if (unlink(to)) 314 warn("%s: remove", to); 315 (void)close(from_fd); 316 (void)close(to_fd); 317 return (1); 318 } 319 320 if (fcpxattr(from_fd, to_fd) == -1) 321 warn("%s: error copying extended attributes", to); 322 323 (void)close(from_fd); 324 #ifdef BSD4_4 325 #if defined(__NetBSD__) 326 ts[0] = sbp->st_atimespec; 327 ts[1] = sbp->st_mtimespec; 328 #else 329 TIMESPEC_TO_TIMEVAL(&tval[0], &sbp->st_atimespec); 330 TIMESPEC_TO_TIMEVAL(&tval[1], &sbp->st_mtimespec); 331 #endif 332 #else 333 tval[0].tv_sec = sbp->st_atime; 334 tval[1].tv_sec = sbp->st_mtime; 335 tval[0].tv_usec = 0; 336 tval[1].tv_usec = 0; 337 #endif 338 #ifdef __SVR4 339 if (utimes(to, tval)) 340 #else 341 #if defined(__NetBSD__) 342 if (futimens(to_fd, ts)) 343 #else 344 if (futimes(to_fd, tval)) 345 #endif 346 #endif 347 warn("%s: set times", to); 348 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 349 if (errno != EPERM) 350 warn("%s: set owner/group", to); 351 sbp->st_mode &= ~(S_ISUID | S_ISGID); 352 } 353 if (fchmod(to_fd, sbp->st_mode)) 354 warn("%s: set mode", to); 355 if (fchflags(to_fd, sbp->st_flags) && (errno != EOPNOTSUPP)) 356 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 357 358 if (close(to_fd)) { 359 warn("%s", to); 360 return (1); 361 } 362 363 if (unlink(from)) { 364 warn("%s: remove", from); 365 return (1); 366 } 367 368 if (vflg) 369 printf("%s -> %s\n", from, to); 370 371 return (0); 372 } 373 374 static int 375 copy(char *from, char *to) 376 { 377 pid_t pid; 378 int 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 warnx("%s: did not terminate normally", _PATH_CP); 391 return (1); 392 } 393 if (WEXITSTATUS(status)) { 394 warnx("%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 warnx("%s: did not terminate normally", _PATH_RM); 409 return (1); 410 } 411 if (WEXITSTATUS(status)) { 412 warnx("%s: terminated with %d (non-zero) status", 413 _PATH_RM, WEXITSTATUS(status)); 414 return (1); 415 } 416 return (0); 417 } 418 419 static 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
Indexes created Thu Oct 23 22:10:10 GMT 2025