mv.c revision 1.9
1 /* $NetBSD: mv.c,v 1.9 1995/03/21 09:06:52 cgd 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 #ifndef lint 40 static char copyright[] = 41 "@(#) 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 static char rcsid[] = "$NetBSD: mv.c,v 1.9 1995/03/21 09:06:52 cgd 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 66 #include "pathnames.h" 67 68 int fflg, iflg; 69 int stdin_ok; 70 71 int copy __P((char *, char *)); 72 int do_move __P((char *, char *)); 73 int fastcopy __P((char *, char *, struct stat *)); 74 void usage __P((void)); 75 76 int 77 main(argc, argv) 78 int argc; 79 char *argv[]; 80 { 81 register int baselen, len, rval; 82 register char *p, *endp; 83 struct stat sb; 84 int ch; 85 char path[MAXPATHLEN + 1]; 86 87 while ((ch = getopt(argc, argv, "if")) != -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 '?': 98 default: 99 usage(); 100 } 101 argc -= optind; 102 argv += optind; 103 104 if (argc < 2) 105 usage(); 106 107 stdin_ok = isatty(STDIN_FILENO); 108 109 /* 110 * If the stat on the target fails or the target isn't a directory, 111 * try the move. More than 2 arguments is an error in this case. 112 */ 113 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 114 if (argc > 2) 115 usage(); 116 exit(do_move(argv[0], argv[1])); 117 } 118 119 /* It's a directory, move each file into it. */ 120 (void)strcpy(path, argv[argc - 1]); 121 baselen = strlen(path); 122 endp = &path[baselen]; 123 *endp++ = '/'; 124 ++baselen; 125 for (rval = 0; --argc; ++argv) { 126 if ((p = strrchr(*argv, '/')) == NULL) 127 p = *argv; 128 else 129 ++p; 130 if ((baselen + (len = strlen(p))) >= MAXPATHLEN) { 131 warnx("%s: destination pathname too long", *argv); 132 rval = 1; 133 } else { 134 memmove(endp, p, len + 1); 135 if (do_move(*argv, path)) 136 rval = 1; 137 } 138 } 139 exit(rval); 140 } 141 142 int 143 do_move(from, to) 144 char *from, *to; 145 { 146 struct stat sb; 147 char modep[15]; 148 149 /* 150 * (1) If the destination path exists, the -f option is not specified 151 * and either of the following conditions are true: 152 * 153 * (a) The perimissions of the destination path do not permit 154 * writing and the standard input is a terminal. 155 * (b) The -i option is specified. 156 * 157 * the mv utility shall write a prompt to standard error and 158 * read a line from standard input. If the response is not 159 * affirmative, mv shall do nothing more with the current 160 * source file... 161 */ 162 if (!fflg && !access(to, F_OK)) { 163 int ask = 1; 164 int ch; 165 166 if (iflg) { 167 (void)fprintf(stderr, "overwrite %s? ", to); 168 } else if (stdin_ok && access(to, W_OK) && !stat(to, &sb)) { 169 strmode(sb.st_mode, modep); 170 (void)fprintf(stderr, "override %s%s%s/%s for %s? ", 171 modep + 1, modep[9] == ' ' ? "" : " ", 172 user_from_uid(sb.st_uid, 0), 173 group_from_gid(sb.st_gid, 0), to); 174 } else 175 ask = 0; 176 if (ask) { 177 if ((ch = getchar()) != EOF && ch != '\n') 178 while (getchar() != '\n'); 179 if (ch != 'y' && ch != 'Y') 180 return (0); 181 } 182 } 183 184 /* 185 * (2) If rename() succeeds, mv shall do nothing more with the 186 * current source file. If it fails for any other reason than 187 * EXDEV, mv shall write a diagnostic message to the standard 188 * error and do nothing more with the current source file. 189 * 190 * (3) If the destination path exists, and it is a file of type 191 * directory and source_file is not a file of type directory, 192 * or it is a file not of type directory, and source file is 193 * a file of type directory, mv shall write a diagnostic 194 * message to standard error, and do nothing more with the 195 * current source file... 196 */ 197 if (!rename(from, to)) 198 return (0); 199 200 if (errno != EXDEV) { 201 warn("rename %s to %s", from, to); 202 return (1); 203 } 204 205 /* 206 * (4) If the destination path exists, mv shall attempt to remove it. 207 * If this fails for any reason, mv shall write a diagnostic 208 * message to the standard error and do nothing more with the 209 * current source file... 210 */ 211 if (!stat(to, &sb)) { 212 if ((S_ISDIR(sb.st_mode)) ? rmdir(to) : unlink(to)) { 213 warn("can't remove %s", to); 214 return (1); 215 } 216 } 217 218 /* 219 * (5) The file hierarchy rooted in source_file shall be duplicated 220 * as a file hiearchy rooted in the destination path... 221 */ 222 if (stat(from, &sb)) { 223 warn("%s", from); 224 return (1); 225 } 226 return (S_ISREG(sb.st_mode) ? 227 fastcopy(from, to, &sb) : copy(from, to)); 228 } 229 230 int 231 fastcopy(from, to, sbp) 232 char *from, *to; 233 struct stat *sbp; 234 { 235 struct timeval tval[2]; 236 static u_int blen; 237 static char *bp; 238 register int nread, from_fd, to_fd; 239 240 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 241 warn("%s", from); 242 return (1); 243 } 244 if ((to_fd = 245 open(to, O_CREAT | O_TRUNC | O_WRONLY, sbp->st_mode)) < 0) { 246 warn("%s", to); 247 (void)close(from_fd); 248 return (1); 249 } 250 if (!blen && !(bp = malloc(blen = sbp->st_blksize))) { 251 warn(NULL); 252 return (1); 253 } 254 while ((nread = read(from_fd, bp, blen)) > 0) 255 if (write(to_fd, bp, nread) != nread) { 256 warn("%s", to); 257 goto err; 258 } 259 if (nread < 0) { 260 warn("%s", from); 261 err: if (unlink(to)) 262 warn("%s: remove", to); 263 (void)close(from_fd); 264 (void)close(to_fd); 265 return (1); 266 } 267 (void)close(from_fd); 268 269 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) 270 warn("%s: set owner/group", to); 271 if (fchmod(to_fd, sbp->st_mode)) 272 warn("%s: set mode", to); 273 274 tval[0].tv_sec = sbp->st_atime; 275 tval[1].tv_sec = sbp->st_mtime; 276 tval[0].tv_usec = tval[1].tv_usec = 0; 277 if (utimes(to, tval)) 278 warn("%s: set times", to); 279 280 if (close(to_fd)) { 281 warn("%s", to); 282 return (1); 283 } 284 285 if (unlink(from)) { 286 warn("%s: remove", from); 287 return (1); 288 } 289 return (0); 290 } 291 292 int 293 copy(from, to) 294 char *from, *to; 295 { 296 int pid, status; 297 298 if ((pid = vfork()) == 0) { 299 execl(_PATH_CP, "mv", "-PRp", from, to, NULL); 300 warn("%s", _PATH_CP); 301 _exit(1); 302 } 303 if (waitpid(pid, &status, 0) == -1) { 304 warn("%s: waitpid", _PATH_CP); 305 return (1); 306 } 307 if (!WIFEXITED(status)) { 308 warn("%s: did not terminate normally", _PATH_CP); 309 return (1); 310 } 311 if (WEXITSTATUS(status)) { 312 warn("%s: terminated with %d (non-zero) status", 313 _PATH_CP, WEXITSTATUS(status)); 314 return (1); 315 } 316 if (!(pid = vfork())) { 317 execl(_PATH_RM, "mv", "-rf", from, NULL); 318 warn("%s", _PATH_RM); 319 _exit(1); 320 } 321 if (waitpid(pid, &status, 0) == -1) { 322 warn("%s: waitpid", _PATH_RM); 323 return (1); 324 } 325 if (!WIFEXITED(status)) { 326 warn("%s: did not terminate normally", _PATH_RM); 327 return (1); 328 } 329 if (WEXITSTATUS(status)) { 330 warn("%s: terminated with %d (non-zero) status", 331 _PATH_RM, WEXITSTATUS(status)); 332 return (1); 333 } 334 return (0); 335 } 336 337 void 338 usage() 339 { 340 341 (void)fprintf(stderr, "usage: mv [-fi] source target\n"); 342 (void)fprintf(stderr, " mv [-fi] source ... directory\n"); 343 exit(1); 344 } 345
Indexes created Fri Oct 03 02:09:57 GMT 2025