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