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 1.9 1996/02/19 05:56:33 pst 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, fflag; 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 = 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 fflag = 1; 127 iflag = 0; 128 break; 129 case 'i': 130 iflag = 1; 131 fflag = 0; 132 break; 133 case 'p': 134 pflag = 1; 135 break; 136 case 'r': 137 rflag = 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, dne, nlen, rval; 257 char *p, *target_mid; 258 259 if ((ftsp = fts_open(argv, fts_options, mastercmp)) == NULL) 260 err(1, NULL); 261 for (rval = 0; (curr = fts_read(ftsp)) != NULL;) { 262 switch (curr->fts_info) { 263 case FTS_NS: 264 case FTS_ERR: 265 warnx("%s: %s", 266 curr->fts_path, strerror(curr->fts_errno)); 267 rval = 1; 268 continue; 269 case FTS_DC: /* Warn, continue. */ 270 warnx("%s: directory causes a cycle", curr->fts_path); 271 rval = 1; 272 continue; 273 case FTS_DP: /* Ignore, continue. */ 274 continue; 275 } 276 277 /* 278 * If we are in case (2) or (3) above, we need to append the 279 * source name to the target name. 280 */ 281 if (type != FILE_TO_FILE) { 282 /* 283 * Need to remember the roots of traversals to create 284 * correct pathnames. If there's a directory being 285 * copied to a non-existent directory, e.g. 286 * cp -R a/dir noexist 287 * the resulting path name should be noexist/foo, not 288 * noexist/dir/foo (where foo is a file in dir), which 289 * is the case where the target exists. 290 * 291 * Also, check for "..". This is for correct path 292 * concatentation for paths ending in "..", e.g. 293 * cp -R .. /tmp 294 * Paths ending in ".." are changed to ".". This is 295 * tricky, but seems the easiest way to fix the problem. 296 * 297 * XXX 298 * Since the first level MUST be FTS_ROOTLEVEL, base 299 * is always initialized. 300 */ 301 if (curr->fts_level == FTS_ROOTLEVEL) 302 if (type != DIR_TO_DNE) { 303 p = strrchr(curr->fts_path, '/'); 304 base = (p == NULL) ? 0 : 305 (int)(p - curr->fts_path + 1); 306 307 if (!strcmp(&curr->fts_path[base], 308 "..")) 309 base += 1; 310 } else 311 base = curr->fts_pathlen; 312 313 p = &curr->fts_path[base]; 314 nlen = curr->fts_pathlen - base; 315 target_mid = to.target_end; 316 if (*p != '/' && target_mid[-1] != '/') 317 *target_mid++ = '/'; 318 *target_mid = 0; 319 if (target_mid - to.p_path + nlen > MAXPATHLEN) { 320 warnx("%s%s: name too long (not copied)", 321 to.p_path, p); 322 rval = 1; 323 continue; 324 } 325 (void)strncat(target_mid, p, nlen); 326 to.p_end = target_mid + nlen; 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", 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 } 397 break; 398 case S_IFIFO: 399 if (Rflag) { 400 if (copy_fifo(curr->fts_statp, !dne)) 401 rval = 1; 402 } else { 403 if (copy_file(curr, dne)) 404 rval = 1; 405 } 406 break; 407 default: 408 if (copy_file(curr, dne)) 409 rval = 1; 410 break; 411 } 412 } 413 if (errno) 414 err(1, "fts_read"); 415 return (rval); 416 } 417 418 /* 419 * mastercmp -- 420 * The comparison function for the copy order. The order is to copy 421 * non-directory files before directory files. The reason for this 422 * is because files tend to be in the same cylinder group as their 423 * parent directory, whereas directories tend not to be. Copying the 424 * files first reduces seeking. 425 */ 426 int 427 mastercmp(a, b) 428 const FTSENT **a, **b; 429 { 430 int a_info, b_info; 431 432 a_info = (*a)->fts_info; 433 if (a_info == FTS_ERR || a_info == FTS_NS || a_info == FTS_DNR) 434 return (0); 435 b_info = (*b)->fts_info; 436 if (b_info == FTS_ERR || b_info == FTS_NS || b_info == FTS_DNR) 437 return (0); 438 if (a_info == FTS_D) 439 return (-1); 440 if (b_info == FTS_D) 441 return (1); 442 return (0); 443 } 444