mv.c revision 1.11
1 /* $NetBSD: mv.c,v 1.11 1997/07/20 19:07:53 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 1.11 1997/07/20 19:07:53 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 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 int main __P((int, char *[])); 76 77 int 78 main(argc, argv) 79 int argc; 80 char *argv[]; 81 { 82 int baselen, len, rval; 83 char *p, *endp; 84 struct stat sb; 85 int ch; 86 char path[MAXPATHLEN + 1]; 87 88 while ((ch = getopt(argc, argv, "if")) != -1) 89 switch (ch) { 90 case 'i': 91 fflg = 0; 92 iflg = 1; 93 break; 94 case 'f': 95 iflg = 0; 96 fflg = 1; 97 break; 98 case '?': 99 default: 100 usage(); 101 } 102 argc -= optind; 103 argv += optind; 104 105 if (argc < 2) 106 usage(); 107 108 stdin_ok = isatty(STDIN_FILENO); 109 110 /* 111 * If the stat on the target fails or the target isn't a directory, 112 * try the move. More than 2 arguments is an error in this case. 113 */ 114 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 115 if (argc > 2) 116 usage(); 117 exit(do_move(argv[0], argv[1])); 118 } 119 120 /* It's a directory, move each file into it. */ 121 (void)strcpy(path, argv[argc - 1]); 122 baselen = strlen(path); 123 endp = &path[baselen]; 124 *endp++ = '/'; 125 ++baselen; 126 for (rval = 0; --argc; ++argv) { 127 if ((p = strrchr(*argv, '/')) == NULL) 128 p = *argv; 129 else 130 ++p; 131 if ((baselen + (len = strlen(p))) >= MAXPATHLEN) { 132 warnx("%s: destination pathname too long", *argv); 133 rval = 1; 134 } else { 135 memmove(endp, p, len + 1); 136 if (do_move(*argv, path)) 137 rval = 1; 138 } 139 } 140 exit(rval); 141 } 142 143 int 144 do_move(from, to) 145 char *from, *to; 146 { 147 struct stat sb; 148 char modep[15]; 149 150 /* 151 * (1) If the destination path exists, the -f option is not specified 152 * and either of the following conditions are true: 153 * 154 * (a) The perimissions of the destination path do not permit 155 * writing and the standard input is a terminal. 156 * (b) The -i option is specified. 157 * 158 * the mv utility shall write a prompt to standard error and 159 * read a line from standard input. If the response is not 160 * affirmative, mv shall do nothing more with the current 161 * source file... 162 */ 163 if (!fflg && !access(to, F_OK)) { 164 int ask = 1; 165 int ch; 166 167 if (iflg) { 168 (void)fprintf(stderr, "overwrite %s? ", to); 169 } else if (stdin_ok && access(to, W_OK) && !stat(to, &sb)) { 170 strmode(sb.st_mode, modep); 171 (void)fprintf(stderr, "override %s%s%s/%s for %s? ", 172 modep + 1, modep[9] == ' ' ? "" : " ", 173 user_from_uid(sb.st_uid, 0), 174 group_from_gid(sb.st_gid, 0), to); 175 } else 176 ask = 0; 177 if (ask) { 178 if ((ch = getchar()) != EOF && ch != '\n') 179 while (getchar() != '\n'); 180 if (ch != 'y' && ch != 'Y') 181 return (0); 182 } 183 } 184 185 /* 186 * (2) If rename() succeeds, mv shall do nothing more with the 187 * current source file. If it fails for any other reason than 188 * EXDEV, mv shall write a diagnostic message to the standard 189 * error and do nothing more with the current source file. 190 * 191 * (3) If the destination path exists, and it is a file of type 192 * directory and source_file is not a file of type directory, 193 * or it is a file not of type directory, and source file is 194 * a file of type directory, mv shall write a diagnostic 195 * message to standard error, and do nothing more with the 196 * current source file... 197 */ 198 if (!rename(from, to)) 199 return (0); 200 201 if (errno != EXDEV) { 202 warn("rename %s to %s", from, to); 203 return (1); 204 } 205 206 /* 207 * (4) If the destination path exists, mv shall attempt to remove it. 208 * If this fails for any reason, mv shall write a diagnostic 209 * message to the standard error and do nothing more with the 210 * current source file... 211 */ 212 if (!stat(to, &sb)) { 213 if ((S_ISDIR(sb.st_mode)) ? rmdir(to) : unlink(to)) { 214 warn("can't remove %s", to); 215 return (1); 216 } 217 } 218 219 /* 220 * (5) The file hierarchy rooted in source_file shall be duplicated 221 * as a file hiearchy rooted in the destination path... 222 */ 223 if (stat(from, &sb)) { 224 warn("%s", from); 225 return (1); 226 } 227 return (S_ISREG(sb.st_mode) ? 228 fastcopy(from, to, &sb) : copy(from, to)); 229 } 230 231 int 232 fastcopy(from, to, sbp) 233 char *from, *to; 234 struct stat *sbp; 235 { 236 struct timeval tval[2]; 237 static u_int blen; 238 static char *bp; 239 int nread, from_fd, to_fd; 240 241 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 242 warn("%s", from); 243 return (1); 244 } 245 if ((to_fd = 246 open(to, O_CREAT | O_TRUNC | O_WRONLY, sbp->st_mode)) < 0) { 247 warn("%s", to); 248 (void)close(from_fd); 249 return (1); 250 } 251 if (!blen && !(bp = malloc(blen = sbp->st_blksize))) { 252 warn("%s", ""); 253 return (1); 254 } 255 while ((nread = read(from_fd, bp, blen)) > 0) 256 if (write(to_fd, bp, nread) != nread) { 257 warn("%s", to); 258 goto err; 259 } 260 if (nread < 0) { 261 warn("%s", from); 262 err: if (unlink(to)) 263 warn("%s: remove", to); 264 (void)close(from_fd); 265 (void)close(to_fd); 266 return (1); 267 } 268 (void)close(from_fd); 269 270 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) 271 warn("%s: set owner/group", to); 272 if (fchmod(to_fd, sbp->st_mode)) 273 warn("%s: set mode", to); 274 275 tval[0].tv_sec = sbp->st_atime; 276 tval[1].tv_sec = sbp->st_mtime; 277 tval[0].tv_usec = tval[1].tv_usec = 0; 278 if (utimes(to, tval)) 279 warn("%s: set times", to); 280 281 if (close(to_fd)) { 282 warn("%s", to); 283 return (1); 284 } 285 286 if (unlink(from)) { 287 warn("%s: remove", from); 288 return (1); 289 } 290 return (0); 291 } 292 293 int 294 copy(from, to) 295 char *from, *to; 296 { 297 int pid, status; 298 299 if ((pid = vfork()) == 0) { 300 execl(_PATH_CP, "mv", "-PRp", from, to, NULL); 301 warn("%s", _PATH_CP); 302 _exit(1); 303 } 304 if (waitpid(pid, &status, 0) == -1) { 305 warn("%s: waitpid", _PATH_CP); 306 return (1); 307 } 308 if (!WIFEXITED(status)) { 309 warn("%s: did not terminate normally", _PATH_CP); 310 return (1); 311 } 312 if (WEXITSTATUS(status)) { 313 warn("%s: terminated with %d (non-zero) status", 314 _PATH_CP, WEXITSTATUS(status)); 315 return (1); 316 } 317 if (!(pid = vfork())) { 318 execl(_PATH_RM, "mv", "-rf", from, NULL); 319 warn("%s", _PATH_RM); 320 _exit(1); 321 } 322 if (waitpid(pid, &status, 0) == -1) { 323 warn("%s: waitpid", _PATH_RM); 324 return (1); 325 } 326 if (!WIFEXITED(status)) { 327 warn("%s: did not terminate normally", _PATH_RM); 328 return (1); 329 } 330 if (WEXITSTATUS(status)) { 331 warn("%s: terminated with %d (non-zero) status", 332 _PATH_RM, WEXITSTATUS(status)); 333 return (1); 334 } 335 return (0); 336 } 337 338 void 339 usage() 340 { 341 342 (void)fprintf(stderr, "usage: mv [-fi] source target\n"); 343 (void)fprintf(stderr, " mv [-fi] source ... directory\n"); 344 exit(1); 345 } 346
Indexes created Fri Oct 03 15:10:06 GMT 2025