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 37 #ifndef lint 38 static char const copyright[] = 39 "@(#) Copyright (c) 1988, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)cp.c 8.2 (Berkeley) 4/1/94"; 46 #endif 47 static const char rcsid[] = 48 "$FreeBSD$"; 49 #endif /* not lint */ 50 51 /* 52 * Cp copies source files to target files. 53 * 54 * The global PATH_T structure "to" always contains the path to the 55 * current target file. Since fts(3) does not change directories, 56 * this path can be either absolute or dot-relative. 57 * 58 * The basic algorithm is to initialize "to" and use fts(3) to traverse 59 * the file hierarchy rooted in the argument list. A trivial case is the 60 * case of 'cp file1 file2'. The more interesting case is the case of 61 * 'cp file1 file2 ... fileN dir' where the hierarchy is traversed and the 62 * path (relative to the root of the traversal) is appended to dir (stored 63 * in "to") to form the final target path. 64 */ 65 66 #include <sys/param.h> 67 #include <sys/stat.h> 68 69 #include <err.h> 70 #include <errno.h> 71 #include <fts.h> 72 #include <stdio.h> 73 #include <string.h> 74 #include <unistd.h> 75 76 #include "extern.h" 77 78 #define STRIP_TRAILING_SLASH(p) { \ 79 while ((p).p_end > (p).p_path + 1 && (p).p_end[-1] == '/') \ 80 *--(p).p_end = 0; \ 81 } 82 83 PATH_T to = { to.p_path, "", "" }; 84 85 uid_t myuid; 86 int Rflag, iflag, pflag, rflag, fflag, vflag; 87 int myumask; 88 89 enum op { FILE_TO_FILE, FILE_TO_DIR, DIR_TO_DNE }; 90 91 int copy __P((char *[], enum op, int)); 92 int mastercmp __P((const FTSENT **, const FTSENT **)); 93 94 int 95 main(argc, argv) 96 int argc; 97 char *argv[]; 98 { 99 struct stat to_stat, tmp_stat; 100 enum op type; 101 int Hflag, Lflag, Pflag, ch, fts_options, r; 102 char *target; 103 104 Hflag = Lflag = Pflag = 0; 105 while ((ch = getopt(argc, argv, "HLPRfiprv")) != -1) 106 switch (ch) { 107 case 'H': 108 Hflag = 1; 109 Lflag = Pflag = 0; 110 break; 111 case 'L': 112 Lflag = 1; 113 Hflag = Pflag = 0; 114 break; 115 case 'P': 116 Pflag = 1; 117 Hflag = Lflag = 0; 118 break; 119 case 'R': 120 Rflag = 1; 121 break; 122 case 'f': 123 fflag = 1; 124 iflag = 0; 125 break; 126 case 'i': 127 iflag = 1; 128 fflag = 0; 129 break; 130 case 'p': 131 pflag = 1; 132 break; 133 case 'r': 134 rflag = 1; 135 break; 136 case 'v': 137 vflag = 1; 138 break; 139 default: 140 usage(); 141 break; 142 } 143 argc -= optind; 144 argv += optind; 145 146 if (argc < 2) 147 usage(); 148 149 fts_options = FTS_NOCHDIR | FTS_PHYSICAL; 150 if (rflag) { 151 if (Rflag) 152 errx(1, 153 "the -R and -r options may not be specified together."); 154 if (Hflag || Lflag || Pflag) 155 errx(1, 156 "the -H, -L, and -P options may not be specified with the -r option."); 157 fts_options &= ~FTS_PHYSICAL; 158 fts_options |= FTS_LOGICAL; 159 } 160 if (Rflag) { 161 if (Hflag) 162 fts_options |= FTS_COMFOLLOW; 163 if (Lflag) { 164 fts_options &= ~FTS_PHYSICAL; 165 fts_options |= FTS_LOGICAL; 166 } 167 } else { 168 fts_options &= ~FTS_PHYSICAL; 169 fts_options |= FTS_LOGICAL; 170 } 171 172 myuid = getuid(); 173 174 /* Copy the umask for explicit mode setting. */ 175 myumask = umask(0); 176 (void)umask(myumask); 177 178 /* Save the target base in "to". */ 179 target = argv[--argc]; 180 if (strlen(target) > MAXPATHLEN) 181 errx(1, "%s: name too long", target); 182 (void)strcpy(to.p_path, target); 183 to.p_end = to.p_path + strlen(to.p_path); 184 if (to.p_path == to.p_end) { 185 *to.p_end++ = '.'; 186 *to.p_end = 0; 187 } 188 STRIP_TRAILING_SLASH(to); 189 to.target_end = to.p_end; 190 191 /* Set end of argument list for fts(3). */ 192 argv[argc] = NULL; 193 194 /* 195 * Cp has two distinct cases: 196 * 197 * cp [-R] source target 198 * cp [-R] source1 ... sourceN directory 199 * 200 * In both cases, source can be either a file or a directory. 201 * 202 * In (1), the target becomes a copy of the source. That is, if the 203 * source is a file, the target will be a file, and likewise for 204 * directories. 205 * 206 * In (2), the real target is not directory, but "directory/source". 207 */ 208 r = stat(to.p_path, &to_stat); 209 if (r == -1 && errno != ENOENT) 210 err(1, "%s", to.p_path); 211 if (r == -1 || !S_ISDIR(to_stat.st_mode)) { 212 /* 213 * Case (1). Target is not a directory. 214 */ 215 if (argc > 1) { 216 usage(); 217 exit(1); 218 } 219 /* 220 * Need to detect the case: 221 * cp -R dir foo 222 * Where dir is a directory and foo does not exist, where 223 * we want pathname concatenations turned on but not for 224 * the initial mkdir(). 225 */ 226 if (r == -1) { 227 if (rflag || (Rflag && (Lflag || Hflag))) 228 stat(*argv, &tmp_stat); 229 else 230 lstat(*argv, &tmp_stat); 231 232 if (S_ISDIR(tmp_stat.st_mode) && (Rflag || rflag)) 233 type = DIR_TO_DNE; 234 else 235 type = FILE_TO_FILE; 236 } else 237 type = FILE_TO_FILE; 238 } else 239 /* 240 * Case (2). Target is a directory. 241 */ 242 type = FILE_TO_DIR; 243 244 exit (copy(argv, type, fts_options)); 245 } 246 247 int 248 copy(argv, type, fts_options) 249 char *argv[]; 250 enum op type; 251 int fts_options; 252 { 253 struct stat to_stat; 254 FTS *ftsp; 255 FTSENT *curr; 256 int base = 0, dne, badcp, nlen, rval; 257 char *p, *target_mid; 258 259 if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL) 260 err(1, NULL); 261 for (badcp = rval = 0; (curr = fts_read(ftsp)) != NULL; badcp = 0) { 262 switch (curr->fts_info) { 263 case FTS_NS: 264 case FTS_DNR: 265 case FTS_ERR: 266 warnx("%s: %s", 267 curr->fts_path, strerror(curr->fts_errno)); 268 badcp = rval = 1; 269 continue; 270 case FTS_DC: /* Warn, continue. */ 271 warnx("%s: directory causes a cycle", curr->fts_path); 272 badcp = rval = 1; 273 continue; 274 case FTS_DP: /* Ignore, continue. */ 275 continue; 276 } 277 278 /* 279 * If we are in case (2) or (3) above, we need to append the 280 * source name to the target name. 281 */ 282 if (type != FILE_TO_FILE) { 283 /* 284 * Need to remember the roots of traversals to create 285 * correct pathnames. If there's a directory being 286 * copied to a non-existent directory, e.g. 287 * cp -R a/dir noexist 288 * the resulting path name should be noexist/foo, not 289 * noexist/dir/foo (where foo is a file in dir), which 290 * is the case where the target exists. 291 * 292 * Also, check for "..". This is for correct path 293 * concatenation for paths ending in "..", e.g. 294 * cp -R .. /tmp 295 * Paths ending in ".." are changed to ".". This is 296 * tricky, but seems the easiest way to fix the problem. 297 * 298 * XXX 299 * Since the first level MUST be FTS_ROOTLEVEL, base 300 * is always initialized. 301 */ 302 if (curr->fts_level == FTS_ROOTLEVEL) { 303 if (type != DIR_TO_DNE) { 304 p = strrchr(curr->fts_path, '/'); 305 base = (p == NULL) ? 0 : 306 (int)(p - curr->fts_path + 1); 307 308 if (!strcmp(&curr->fts_path[base], 309 "..")) 310 base += 1; 311 } else 312 base = curr->fts_pathlen; 313 } 314 315 p = &curr->fts_path[base]; 316 nlen = curr->fts_pathlen - base; 317 target_mid = to.target_end; 318 if (*p != '/' && target_mid[-1] != '/') 319 *target_mid++ = '/'; 320 *target_mid = 0; 321 if (target_mid - to.p_path + nlen > MAXPATHLEN) { 322 warnx("%s%s: name too long (not copied)", 323 to.p_path, p); 324 badcp = rval = 1; 325 continue; 326 } 327 (void)strncat(target_mid, p, nlen); 328 to.p_end = target_mid + nlen; 329 *to.p_end = 0; 330 STRIP_TRAILING_SLASH(to); 331 } 332 333 /* Not an error but need to remember it happened */ 334 if (stat(to.p_path, &to_stat) == -1) 335 dne = 1; 336 else { 337 if (to_stat.st_dev == curr->fts_statp->st_dev && 338 to_stat.st_ino == curr->fts_statp->st_ino) { 339 warnx("%s and %s are identical (not copied).", 340 to.p_path, curr->fts_path); 341 badcp = rval = 1; 342 if (S_ISDIR(curr->fts_statp->st_mode)) 343 (void)fts_set(ftsp, curr, FTS_SKIP); 344 continue; 345 } 346 if (!S_ISDIR(curr->fts_statp->st_mode) && 347 S_ISDIR(to_stat.st_mode)) { 348 warnx("cannot overwrite directory %s with non-directory %s", 349 to.p_path, curr->fts_path); 350 badcp = rval = 1; 351 continue; 352 } 353 dne = 0; 354 } 355 356 switch (curr->fts_statp->st_mode & S_IFMT) { 357 case S_IFLNK: 358 if (copy_link(curr, !dne)) 359 badcp = rval = 1; 360 break; 361 case S_IFDIR: 362 if (!Rflag && !rflag) { 363 warnx("%s is a directory (not copied).", 364 curr->fts_path); 365 (void)fts_set(ftsp, curr, FTS_SKIP); 366 badcp = rval = 1; 367 break; 368 } 369 /* 370 * If the directory doesn't exist, create the new 371 * one with the from file mode plus owner RWX bits, 372 * modified by the umask. Trade-off between being 373 * able to write the directory (if from directory is 374 * 555) and not causing a permissions race. If the 375 * umask blocks owner writes, we fail.. 376 */ 377 if (dne) { 378 if (mkdir(to.p_path, 379 curr->fts_statp->st_mode | S_IRWXU) < 0) 380 err(1, "%s", to.p_path); 381 } else if (!S_ISDIR(to_stat.st_mode)) { 382 errno = ENOTDIR; 383 err(1, "%s", to.p_path); 384 } 385 /* 386 * If not -p and directory didn't exist, set it to be 387 * the same as the from directory, umodified by the 388 * umask; arguably wrong, but it's been that way 389 * forever. 390 */ 391 if (pflag && setfile(curr->fts_statp, 0)) 392 badcp = rval = 1; 393 else if (dne) 394 (void)chmod(to.p_path, 395 curr->fts_statp->st_mode); 396 break; 397 case S_IFBLK: 398 case S_IFCHR: 399 if (Rflag) { 400 if (copy_special(curr->fts_statp, !dne)) 401 badcp = rval = 1; 402 } else { 403 if (copy_file(curr, dne)) 404 badcp = rval = 1; 405 } 406 break; 407 case S_IFIFO: 408 if (Rflag) { 409 if (copy_fifo(curr->fts_statp, !dne)) 410 badcp = rval = 1; 411 } else { 412 if (copy_file(curr, dne)) 413 badcp = rval = 1; 414 } 415 break; 416 default: 417 if (copy_file(curr, dne)) 418 badcp = rval = 1; 419 break; 420 } 421 if (vflag && !badcp) 422 (void)printf("%s -> %s\n", curr->fts_path, to.p_path); 423 } 424 if (errno) 425 err(1, "fts_read"); 426 return (rval); 427 } 428 429 /* 430 * mastercmp -- 431 * The comparison function for the copy order. The order is to copy 432 * non-directory files before directory files. The reason for this 433 * is because files tend to be in the same cylinder group as their 434 * parent directory, whereas directories tend not to be. Copying the 435 * files first reduces seeking. 436 */ 437 int 438 mastercmp(a, b) 439 const FTSENT **a, **b; 440 { 441 int a_info, b_info; 442 443 a_info = (*a)->fts_info; 444 if (a_info == FTS_ERR || a_info == FTS_NS || a_info == FTS_DNR) 445 return (0); 446 b_info = (*b)->fts_info; 447 if (b_info == FTS_ERR || b_info == FTS_NS || b_info == FTS_DNR) 448 return (0); 449 if (a_info == FTS_D) 450 return (-1); 451 if (b_info == FTS_D) 452 return (1); 453 return (0); 454 } 455