1 /* 2 * Copyright (c) 1988, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * David Hitz of Auspex Systems Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * $Id: cp.c,v 1.5 1995/04/02 00:49:16 bde Exp $ 37 */ 38 39 #ifndef lint 40 static char copyright[] = 41 "@(#) Copyright (c) 1988, 1993, 1994\n\ 42 The Regents of the University of California. All rights reserved.\n"; 43 #endif /* not lint */ 44 45 #ifndef lint 46 static char sccsid[] = "@(#)cp.c 8.2 (Berkeley) 4/1/94"; 47 #endif /* not lint */ 48 49 /* 50 * Cp copies source files to target files. 51 * 52 * The global PATH_T structure "to" always contains the path to the 53 * current target file. Since fts(3) does not change directories, 54 * this path can be either absolute or dot-realative. 55 * 56 * The basic algorithm is to initialize "to" and use fts(3) to traverse 57 * the file hierarchy rooted in the argument list. A trivial case is the 58 * case of 'cp file1 file2'. The more interesting case is the case of 59 * 'cp file1 file2 ... fileN dir' where the hierarchy is traversed and the 60 * path (relative to the root of the traversal) is appended to dir (stored 61 * in "to") to form the final target path. 62 */ 63 64 #include <sys/param.h> 65 #include <sys/stat.h> 66 #include <sys/mman.h> 67 #include <sys/time.h> 68 69 #include <dirent.h> 70 #include <err.h> 71 #include <errno.h> 72 #include <fcntl.h> 73 #include <fts.h> 74 #include <stdio.h> 75 #include <stdlib.h> 76 #include <string.h> 77 #include <unistd.h> 78 79 #include "extern.h" 80 81 #define STRIP_TRAILING_SLASH(p) { \ 82 while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/') \ 83 *--(p).p_end = 0; \ 84 } 85 86 PATH_T to = { to.p_path, "" }; 87 88 uid_t myuid; 89 int Rflag, iflag, pflag, rflag; 90 int myumask; 91 92 enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE }; 93 94 int copy __P((char *[], enum op, int)); 95 int mastercmp __P((const FTSENT **, const FTSENT **)); 96 97 int 98 main(argc, argv) 99 int argc; 100 char *argv[]; 101 { 102 struct stat to_stat, tmp_stat; 103 enum op type; 104 int Hflag, Lflag, Pflag, ch, fts_options, r; 105 char *target; 106 107 Hflag = Lflag = Pflag = Rflag = 0; 108 while ((ch = getopt(argc, argv, "HLPRfipr")) != EOF) 109 switch (ch) { 110 case 'H': 111 Hflag = 1; 112 Lflag = Pflag = 0; 113 break; 114 case 'L': 115 Lflag = 1; 116 Hflag = Pflag = 0; 117 break; 118 case 'P': 119 Pflag = 1; 120 Hflag = Lflag = 0; 121 break; 122 case 'R': 123 Rflag = 1; 124 break; 125 case 'f': 126 iflag = 0; 127 break; 128 case 'i': 129 iflag = isatty(fileno(stdin)); 130 break; 131 case 'p': 132 pflag = 1; 133 break; 134 case 'r': 135 rflag = 1; 136 break; 137 case '?': 138 default: 139 usage(); 140 break; 141 } 142 argc -= optind; 143 argv += optind; 144 145 if (argc < 2) 146 usage(); 147 148 fts_options = FTS_NOCHDIR | FTS_PHYSICAL; 149 if (rflag) { 150 if (Rflag) 151 errx(1, 152 "the -R and -r options may not be specified together."); 153 if (Hflag || Lflag || Pflag) 154 errx(1, 155 "the -H, -L, and -P options may not be specified with the -r option."); 156 fts_options &= ~FTS_PHYSICAL; 157 fts_options |= FTS_LOGICAL; 158 } 159 if (Rflag) { 160 if (Hflag) 161 fts_options |= FTS_COMFOLLOW; 162 if (Lflag) { 163 fts_options &= ~FTS_PHYSICAL; 164 fts_options |= FTS_LOGICAL; 165 } 166 } else { 167 fts_options &= ~FTS_PHYSICAL; 168 fts_options |= FTS_LOGICAL; 169 } 170 171 myuid = getuid(); 172 173 /* Copy the umask for explicit mode setting. */ 174 myumask = umask(0); 175 (void)umask(myumask); 176 177 /* Save the target base in "to". */ 178 target = argv[--argc]; 179 if (strlen(target) > MAXPATHLEN) 180 errx(1, "%s: name too long", target); 181 (void)strcpy(to.p_path, target); 182 to.p_end = to.p_path + strlen(to.p_path); 183 if (to.p_path == to.p_end) { 184 *to.p_end++ = '.'; 185 *to.p_end = 0; 186 } 187 STRIP_TRAILING_SLASH(to); 188 to.target_end = to.p_end; 189 190 /* Set end of argument list for fts(3). */ 191 argv[argc] = NULL; 192 193 /* 194 * Cp has two distinct cases: 195 * 196 * cp [-R] source target 197 * cp [-R] source1 ... sourceN directory 198 * 199 * In both cases, source can be either a file or a directory. 200 * 201 * In (1), the target becomes a copy of the source. That is, if the 202 * source is a file, the target will be a file, and likewise for 203 * directories. 204 * 205 * In (2), the real target is not directory, but "directory/source". 206 */ 207 r = stat(to.p_path, &to_stat); 208 if (r == -1 && errno != ENOENT) 209 err(1, "%s", to.p_path); 210 if (r == -1 || !S_ISDIR(to_stat.st_mode)) { 211 /* 212 * Case (1). Target is not a directory. 213 */ 214 if (argc > 1) { 215 usage(); 216 exit(1); 217 } 218 /* 219 * Need to detect the case: 220 * cp -R dir foo 221 * Where dir is a directory and foo does not exist, where 222 * we want pathname concatenations turned on but not for 223 * the initial mkdir(). 224 */ 225 if (r == -1) { 226 if (rflag || (Rflag && (Lflag || Hflag))) 227 stat(*argv, &tmp_stat); 228 else 229 lstat(*argv, &tmp_stat); 230 231 if (S_ISDIR(tmp_stat.st_mode) && (Rflag || rflag)) 232 type = DIR_TO_DNE; 233 else 234 type = FILE_TO_FILE; 235 } else 236 type = FILE_TO_FILE; 237 } else 238 /* 239 * Case (2). Target is a directory. 240 */ 241 type = FILE_TO_DIR; 242 243 exit (copy(argv, type, fts_options)); 244 } 245 246 int 247 copy(argv, type, fts_options) 248 char *argv[]; 249 enum op type; 250 int fts_options; 251 { 252 struct stat to_stat; 253 FTS *ftsp; 254 FTSENT *curr; 255 int base, dne, nlen, rval; 256 char *p, *target_mid; 257 258 if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL) 259 err(1, NULL); 260 for (rval = 0; (curr = fts_read(ftsp)) != NULL;) { 261 switch (curr->fts_info) { 262 case FTS_NS: 263 case FTS_ERR: 264 warnx("%s: %s", 265 curr->fts_path, strerror(curr->fts_errno)); 266 rval = 1; 267 continue; 268 case FTS_DC: /* Warn, continue. */ 269 warnx("%s: directory causes a cycle", curr->fts_path); 270 rval = 1; 271 continue; 272 case FTS_DP: /* Ignore, continue. */ 273 continue; 274 } 275 276 /* 277 * If we are in case (2) or (3) above, we need to append the 278 * source name to the target name. 279 */ 280 if (type != FILE_TO_FILE) { 281 /* 282 * Need to remember the roots of traversals to create 283 * correct pathnames. If there's a directory being 284 * copied to a non-existent directory, e.g. 285 * cp -R a/dir noexist 286 * the resulting path name should be noexist/foo, not 287 * noexist/dir/foo (where foo is a file in dir), which 288 * is the case where the target exists. 289 * 290 * Also, check for "..". This is for correct path 291 * concatentation for paths ending in "..", e.g. 292 * cp -R .. /tmp 293 * Paths ending in ".." are changed to ".". This is 294 * tricky, but seems the easiest way to fix the problem. 295 * 296 * XXX 297 * Since the first level MUST be FTS_ROOTLEVEL, base 298 * is always initialized. 299 */ 300 if (curr->fts_level == FTS_ROOTLEVEL) 301 if (type != DIR_TO_DNE) { 302 p = strrchr(curr->fts_path, '/'); 303 base = (p == NULL) ? 0 : 304 (int)(p - curr->fts_path + 1); 305 306 if (!strcmp(&curr->fts_path[base], 307 "..")) 308 base += 1; 309 } else 310 base = curr->fts_pathlen; 311 312 p = &curr->fts_path[base]; 313 nlen = curr->fts_pathlen - base; 314 target_mid = to.target_end; 315 if (*p != '/' && target_mid[-1] != '/') 316 *target_mid++ = '/'; 317 *target_mid = 0; 318 if (target_mid - to.p_path + nlen > MAXPATHLEN) { 319 warnx("%s%s: name too long (not copied)", 320 to.p_path, p); 321 rval = 1; 322 continue; 323 } 324 (void)strncat(target_mid, p, nlen); 325 to.p_end = target_mid + nlen; 326 *to.p_end = 0; 327 STRIP_TRAILING_SLASH(to); 328 } 329 330 /* Not an error but need to remember it happened */ 331 if (stat(to.p_path, &to_stat) == -1) 332 dne = 1; 333 else { 334 if (to_stat.st_dev == curr->fts_statp->st_dev && 335 to_stat.st_ino == curr->fts_statp->st_ino) { 336 warnx("%s and %s are identical (not copied).", 337 to.p_path, curr->fts_path); 338 rval = 1; 339 if (S_ISDIR(curr->fts_statp->st_mode)) 340 (void)fts_set(ftsp, curr, FTS_SKIP); 341 continue; 342 } 343 dne = 0; 344 } 345 346 switch (curr->fts_statp->st_mode & S_IFMT) { 347 case S_IFLNK: 348 if (copy_link(curr, !dne)) 349 rval = 1; 350 break; 351 case S_IFDIR: 352 if (!Rflag && !rflag) { 353 warnx("%s is a directory (not copied).", 354 curr->fts_path); 355 (void)fts_set(ftsp, curr, FTS_SKIP); 356 rval = 1; 357 break; 358 } 359 /* 360 * If the directory doesn't exist, create the new 361 * one with the from file mode plus owner RWX bits, 362 * modified by the umask. Trade-off between being 363 * able to write the directory (if from directory is 364 * 555) and not causing a permissions race. If the 365 * umask blocks owner writes, we fail.. 366 */ 367 if (dne) { 368 if (mkdir(to.p_path, 369 curr->fts_statp->st_mode | S_IRWXU) < 0) 370 err(1, "%s", to.p_path); 371 } else if (!S_ISDIR(to_stat.st_mode)) { 372 errno = ENOTDIR; 373 err(1, "%s", to.p_path); 374 } 375 /* 376 * If not -p and directory didn't exist, set it to be 377 * the same as the from directory, umodified by the 378 * umask; arguably wrong, but it's been that way 379 * forever. 380 */ 381 if (pflag && setfile(curr->fts_statp, 0)) 382 rval = 1; 383 else if (dne) 384 (void)chmod(to.p_path, 385 curr->fts_statp->st_mode); 386 break; 387 case S_IFBLK: 388 case S_IFCHR: 389 if (Rflag) { 390 if (copy_special(curr->fts_statp, !dne)) 391 rval = 1; 392 } else { 393 if (copy_file(curr, dne)) 394 rval = 1; 395 } 396 break; 397 case S_IFIFO: 398 if (Rflag) { 399 if (copy_fifo(curr->fts_statp, !dne)) 400 rval = 1; 401 } else { 402 if (copy_file(curr, dne)) 403 rval = 1; 404 } 405 break; 406 default: 407 if (copy_file(curr, dne)) 408 rval = 1; 409 break; 410 } 411 } 412 if (errno) 413 err(1, "fts_read"); 414 return (rval); 415 } 416 417 /* 418 * mastercmp -- 419 * The comparison function for the copy order. The order is to copy 420 * non-directory files before directory files. The reason for this 421 * is because files tend to be in the same cylinder group as their 422 * parent directory, whereas directories tend not to be. Copying the 423 * files first reduces seeking. 424 */ 425 int 426 mastercmp(a, b) 427 const FTSENT **a, **b; 428 { 429 int a_info, b_info; 430 431 a_info = (*a)->fts_info; 432 if (a_info == FTS_ERR || a_info == FTS_NS || a_info == FTS_DNR) 433 return (0); 434 b_info = (*b)->fts_info; 435 if (b_info == FTS_ERR || b_info == FTS_NS || b_info == FTS_DNR) 436 return (0); 437 if (a_info == FTS_D) 438 return (-1); 439 if (b_info == FTS_D) 440 return (1); 441 return (0); 442 } 443