mv.c revision 1.12
1 /* $NetBSD: mv.c,v 1.12 1997/07/20 19:20:46 christos 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 1.12 1997/07/20 19:20:46 christos 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 <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <unistd.h> 65 #include <pwd.h> 66 #include <grp.h> 67 68 #include "pathnames.h" 69 70 int fflg, iflg; 71 int stdin_ok; 72 73 int copy __P((char *, char *)); 74 int do_move __P((char *, char *)); 75 int fastcopy __P((char *, char *, struct stat *)); 76 void usage __P((void)); 77 int main __P((int, char *[])); 78 79 int 80 main(argc, argv) 81 int argc; 82 char *argv[]; 83 { 84 int baselen, len, rval; 85 char *p, *endp; 86 struct stat sb; 87 int ch; 88 char path[MAXPATHLEN + 1]; 89 90 while ((ch = getopt(argc, argv, "if")) != -1) 91 switch (ch) { 92 case 'i': 93 fflg = 0; 94 iflg = 1; 95 break; 96 case 'f': 97 iflg = 0; 98 fflg = 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)strcpy(path, argv[argc - 1]); 124 baselen = strlen(path); 125 endp = &path[baselen]; 126 *endp++ = '/'; 127 ++baselen; 128 for (rval = 0; --argc; ++argv) { 129 if ((p = strrchr(*argv, '/')) == NULL) 130 p = *argv; 131 else 132 ++p; 133 if ((baselen + (len = strlen(p))) >= MAXPATHLEN) { 134 warnx("%s: destination pathname too long", *argv); 135 rval = 1; 136 } else { 137 memmove(endp, p, len + 1); 138 if (do_move(*argv, path)) 139 rval = 1; 140 } 141 } 142 exit(rval); 143 } 144 145 int 146 do_move(from, to) 147 char *from, *to; 148 { 149 struct stat sb; 150 char modep[15]; 151 152 /* 153 * (1) If the destination path exists, the -f option is not specified 154 * and either of the following conditions are true: 155 * 156 * (a) The perimissions of the destination path do not permit 157 * writing and the standard input is a terminal. 158 * (b) The -i option is specified. 159 * 160 * the mv utility shall write a prompt to standard error and 161 * read a line from standard input. If the response is not 162 * affirmative, mv shall do nothing more with the current 163 * source file... 164 */ 165 if (!fflg && !access(to, F_OK)) { 166 int ask = 1; 167 int ch; 168 169 if (iflg) { 170 (void)fprintf(stderr, "overwrite %s? ", to); 171 } else if (stdin_ok && access(to, W_OK) && !stat(to, &sb)) { 172 strmode(sb.st_mode, modep); 173 (void)fprintf(stderr, "override %s%s%s/%s for %s? ", 174 modep + 1, modep[9] == ' ' ? "" : " ", 175 user_from_uid(sb.st_uid, 0), 176 group_from_gid(sb.st_gid, 0), to); 177 } else 178 ask = 0; 179 if (ask) { 180 if ((ch = getchar()) != EOF && ch != '\n') 181 while (getchar() != '\n'); 182 if (ch != 'y' && ch != 'Y') 183 return (0); 184 } 185 } 186 187 /* 188 * (2) If rename() succeeds, mv shall do nothing more with the 189 * current source file. If it fails for any other reason than 190 * EXDEV, mv shall write a diagnostic message to the standard 191 * error and do nothing more with the current source file. 192 * 193 * (3) If the destination path exists, and it is a file of type 194 * directory and source_file is not a file of type directory, 195 * or it is a file not of type directory, and source file is 196 * a file of type directory, mv shall write a diagnostic 197 * message to standard error, and do nothing more with the 198 * current source file... 199 */ 200 if (!rename(from, to)) 201 return (0); 202 203 if (errno != EXDEV) { 204 warn("rename %s to %s", from, to); 205 return (1); 206 } 207 208 /* 209 * (4) If the destination path exists, mv shall attempt to remove it. 210 * If this fails for any reason, mv shall write a diagnostic 211 * message to the standard error and do nothing more with the 212 * current source file... 213 */ 214 if (!stat(to, &sb)) { 215 if ((S_ISDIR(sb.st_mode)) ? rmdir(to) : unlink(to)) { 216 warn("can't remove %s", to); 217 return (1); 218 } 219 } 220 221 /* 222 * (5) The file hierarchy rooted in source_file shall be duplicated 223 * as a file hiearchy rooted in the destination path... 224 */ 225 if (stat(from, &sb)) { 226 warn("%s", from); 227 return (1); 228 } 229 return (S_ISREG(sb.st_mode) ? 230 fastcopy(from, to, &sb) : copy(from, to)); 231 } 232 233 int 234 fastcopy(from, to, sbp) 235 char *from, *to; 236 struct stat *sbp; 237 { 238 struct timeval tval[2]; 239 static u_int blen; 240 static char *bp; 241 int nread, from_fd, to_fd; 242 243 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 244 warn("%s", from); 245 return (1); 246 } 247 if ((to_fd = 248 open(to, O_CREAT | O_TRUNC | O_WRONLY, sbp->st_mode)) < 0) { 249 warn("%s", to); 250 (void)close(from_fd); 251 return (1); 252 } 253 if (!blen && !(bp = malloc(blen = sbp->st_blksize))) { 254 warn("%s", ""); 255 return (1); 256 } 257 while ((nread = read(from_fd, bp, blen)) > 0) 258 if (write(to_fd, bp, nread) != nread) { 259 warn("%s", to); 260 goto err; 261 } 262 if (nread < 0) { 263 warn("%s", from); 264 err: if (unlink(to)) 265 warn("%s: remove", to); 266 (void)close(from_fd); 267 (void)close(to_fd); 268 return (1); 269 } 270 (void)close(from_fd); 271 272 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) 273 warn("%s: set owner/group", to); 274 if (fchmod(to_fd, sbp->st_mode)) 275 warn("%s: set mode", to); 276 277 tval[0].tv_sec = sbp->st_atime; 278 tval[1].tv_sec = sbp->st_mtime; 279 tval[0].tv_usec = tval[1].tv_usec = 0; 280 if (utimes(to, tval)) 281 warn("%s: set times", to); 282 283 if (close(to_fd)) { 284 warn("%s", to); 285 return (1); 286 } 287 288 if (unlink(from)) { 289 warn("%s: remove", from); 290 return (1); 291 } 292 return (0); 293 } 294 295 int 296 copy(from, to) 297 char *from, *to; 298 { 299 int pid, status; 300 301 if ((pid = vfork()) == 0) { 302 execl(_PATH_CP, "mv", "-PRp", from, to, NULL); 303 warn("%s", _PATH_CP); 304 _exit(1); 305 } 306 if (waitpid(pid, &status, 0) == -1) { 307 warn("%s: waitpid", _PATH_CP); 308 return (1); 309 } 310 if (!WIFEXITED(status)) { 311 warn("%s: did not terminate normally", _PATH_CP); 312 return (1); 313 } 314 if (WEXITSTATUS(status)) { 315 warn("%s: terminated with %d (non-zero) status", 316 _PATH_CP, WEXITSTATUS(status)); 317 return (1); 318 } 319 if (!(pid = vfork())) { 320 execl(_PATH_RM, "mv", "-rf", from, NULL); 321 warn("%s", _PATH_RM); 322 _exit(1); 323 } 324 if (waitpid(pid, &status, 0) == -1) { 325 warn("%s: waitpid", _PATH_RM); 326 return (1); 327 } 328 if (!WIFEXITED(status)) { 329 warn("%s: did not terminate normally", _PATH_RM); 330 return (1); 331 } 332 if (WEXITSTATUS(status)) { 333 warn("%s: terminated with %d (non-zero) status", 334 _PATH_RM, WEXITSTATUS(status)); 335 return (1); 336 } 337 return (0); 338 } 339 340 void 341 usage() 342 { 343 344 (void)fprintf(stderr, "usage: mv [-fi] source target\n"); 345 (void)fprintf(stderr, " mv [-fi] source ... directory\n"); 346 exit(1); 347 } 348
Indexes created Fri Oct 03 15:10:06 GMT 2025