mv.c revision 1.18
1 /* $NetBSD: mv.c,v 1.18 1998/07/28 05:31:26 mycroft 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 1.18 1998/07/28 05:31:26 mycroft 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 <locale.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <unistd.h> 66 #include <pwd.h> 67 #include <grp.h> 68 69 #include "pathnames.h" 70 71 int fflg, iflg; 72 int stdin_ok; 73 74 int copy __P((char *, char *)); 75 int do_move __P((char *, char *)); 76 int fastcopy __P((char *, char *, struct stat *)); 77 void usage __P((void)); 78 int main __P((int, char *[])); 79 80 int 81 main(argc, argv) 82 int argc; 83 char *argv[]; 84 { 85 int baselen, len, rval; 86 char *p, *endp; 87 struct stat sb; 88 int ch; 89 char path[MAXPATHLEN + 1]; 90 91 (void)setlocale(LC_ALL, ""); 92 93 while ((ch = getopt(argc, argv, "if")) != -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 '?': 104 default: 105 usage(); 106 } 107 argc -= optind; 108 argv += optind; 109 110 if (argc < 2) 111 usage(); 112 113 stdin_ok = isatty(STDIN_FILENO); 114 115 /* 116 * If the stat on the target fails or the target isn't a directory, 117 * try the move. More than 2 arguments is an error in this case. 118 */ 119 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 120 if (argc > 2) 121 usage(); 122 exit(do_move(argv[0], argv[1])); 123 /* NOTREACHED */ 124 } 125 126 /* It's a directory, move each file into it. */ 127 (void)strcpy(path, argv[argc - 1]); 128 baselen = strlen(path); 129 endp = &path[baselen]; 130 *endp++ = '/'; 131 ++baselen; 132 for (rval = 0; --argc; ++argv) { 133 p = *argv + strlen(*argv) - 1; 134 while (*p == '/' && p != *argv) 135 *p-- = '\0'; 136 if ((p = strrchr(*argv, '/')) == NULL) 137 p = *argv; 138 else 139 ++p; 140 141 if ((baselen + (len = strlen(p))) >= MAXPATHLEN) { 142 warnx("%s: destination pathname too long", *argv); 143 rval = 1; 144 } else { 145 memmove(endp, p, len + 1); 146 if (do_move(*argv, path)) 147 rval = 1; 148 } 149 } 150 exit(rval); 151 /* NOTREACHED */ 152 } 153 154 int 155 do_move(from, to) 156 char *from, *to; 157 { 158 struct stat sb; 159 char modep[15]; 160 161 /* 162 * (1) If the destination path exists, the -f option is not specified 163 * and either of the following conditions are true: 164 * 165 * (a) The perimissions of the destination path do not permit 166 * writing and the standard input is a terminal. 167 * (b) The -i option is specified. 168 * 169 * the mv utility shall write a prompt to standard error and 170 * read a line from standard input. If the response is not 171 * affirmative, mv shall do nothing more with the current 172 * source file... 173 */ 174 if (!fflg && !access(to, F_OK)) { 175 int ask = 1; 176 int ch; 177 178 if (iflg) { 179 (void)fprintf(stderr, "overwrite %s? ", to); 180 } else if (stdin_ok && access(to, W_OK) && !stat(to, &sb)) { 181 strmode(sb.st_mode, modep); 182 (void)fprintf(stderr, "override %s%s%s/%s for %s? ", 183 modep + 1, modep[9] == ' ' ? "" : " ", 184 user_from_uid(sb.st_uid, 0), 185 group_from_gid(sb.st_gid, 0), to); 186 } else 187 ask = 0; 188 if (ask) { 189 if ((ch = getchar()) != EOF && ch != '\n') 190 while (getchar() != '\n'); 191 if (ch != 'y' && ch != 'Y') 192 return (0); 193 } 194 } 195 196 /* 197 * (2) If rename() succeeds, mv shall do nothing more with the 198 * current source file. If it fails for any other reason than 199 * EXDEV, mv shall write a diagnostic message to the standard 200 * error and do nothing more with the current source file. 201 * 202 * (3) If the destination path exists, and it is a file of type 203 * directory and source_file is not a file of type directory, 204 * or it is a file not of type directory, and source file is 205 * a file of type directory, mv shall write a diagnostic 206 * message to standard error, and do nothing more with the 207 * current source file... 208 */ 209 if (!rename(from, to)) 210 return (0); 211 212 if (errno != EXDEV) { 213 warn("rename %s to %s", from, to); 214 return (1); 215 } 216 217 /* 218 * (4) If the destination path exists, mv shall attempt to remove it. 219 * If this fails for any reason, mv shall write a diagnostic 220 * message to the standard error and do nothing more with the 221 * current source file... 222 */ 223 if (!lstat(to, &sb)) { 224 if ((S_ISDIR(sb.st_mode)) ? rmdir(to) : unlink(to)) { 225 warn("can't remove %s", to); 226 return (1); 227 } 228 } 229 230 /* 231 * (5) The file hierarchy rooted in source_file shall be duplicated 232 * as a file hierarchy rooted in the destination path... 233 */ 234 if (lstat(from, &sb)) { 235 warn("%s", from); 236 return (1); 237 } 238 return (S_ISREG(sb.st_mode) ? 239 fastcopy(from, to, &sb) : copy(from, to)); 240 } 241 242 int 243 fastcopy(from, to, sbp) 244 char *from, *to; 245 struct stat *sbp; 246 { 247 struct timeval tval[2]; 248 static u_int blen; 249 static char *bp; 250 int nread, from_fd, to_fd; 251 252 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 253 warn("%s", from); 254 return (1); 255 } 256 if ((to_fd = 257 open(to, O_CREAT | O_TRUNC | O_WRONLY, sbp->st_mode)) < 0) { 258 warn("%s", to); 259 (void)close(from_fd); 260 return (1); 261 } 262 if (!blen && !(bp = malloc(blen = sbp->st_blksize))) { 263 warn("%s", ""); 264 return (1); 265 } 266 while ((nread = read(from_fd, bp, blen)) > 0) 267 if (write(to_fd, bp, nread) != nread) { 268 warn("%s", to); 269 goto err; 270 } 271 if (nread < 0) { 272 warn("%s", from); 273 err: if (unlink(to)) 274 warn("%s: remove", to); 275 (void)close(from_fd); 276 (void)close(to_fd); 277 return (1); 278 } 279 (void)close(from_fd); 280 281 TIMESPEC_TO_TIMEVAL(&tval[0], &sbp->st_atimespec); 282 TIMESPEC_TO_TIMEVAL(&tval[1], &sbp->st_mtimespec); 283 if (futimes(to_fd, tval)) 284 warn("%s: set times", to); 285 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 286 if (errno != EPERM) 287 warn("%s: set owner/group", to); 288 sbp->st_mode &= ~(S_ISUID | S_ISGID); 289 } 290 if (fchmod(to_fd, sbp->st_mode)) 291 warn("%s: set mode", to); 292 293 if (close(to_fd)) { 294 warn("%s", to); 295 return (1); 296 } 297 298 if (unlink(from)) { 299 warn("%s: remove", from); 300 return (1); 301 } 302 return (0); 303 } 304 305 int 306 copy(from, to) 307 char *from, *to; 308 { 309 int pid, status; 310 311 if ((pid = vfork()) == 0) { 312 execl(_PATH_CP, "mv", "-PRp", from, to, NULL); 313 warn("%s", _PATH_CP); 314 _exit(1); 315 /* NOTREACHED */ 316 } 317 if (waitpid(pid, &status, 0) == -1) { 318 warn("%s: waitpid", _PATH_CP); 319 return (1); 320 } 321 if (!WIFEXITED(status)) { 322 warn("%s: did not terminate normally", _PATH_CP); 323 return (1); 324 } 325 if (WEXITSTATUS(status)) { 326 warn("%s: terminated with %d (non-zero) status", 327 _PATH_CP, WEXITSTATUS(status)); 328 return (1); 329 } 330 if (!(pid = vfork())) { 331 execl(_PATH_RM, "mv", "-rf", from, NULL); 332 warn("%s", _PATH_RM); 333 _exit(1); 334 /* NOTREACHED */ 335 } 336 if (waitpid(pid, &status, 0) == -1) { 337 warn("%s: waitpid", _PATH_RM); 338 return (1); 339 } 340 if (!WIFEXITED(status)) { 341 warn("%s: did not terminate normally", _PATH_RM); 342 return (1); 343 } 344 if (WEXITSTATUS(status)) { 345 warn("%s: terminated with %d (non-zero) status", 346 _PATH_RM, WEXITSTATUS(status)); 347 return (1); 348 } 349 return (0); 350 } 351 352 void 353 usage() 354 { 355 356 (void)fprintf(stderr, "usage: mv [-fi] source target\n"); 357 (void)fprintf(stderr, " mv [-fi] source ... directory\n"); 358 exit(1); 359 /* NOTREACHED */ 360 } 361
Indexes created Fri Oct 03 15:10:06 GMT 2025