1/*- 2 * Copyright (c) 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef lint 31#if 0 32static char sccsid[] = "@(#)utils.c 8.3 (Berkeley) 4/1/94"; 33#endif 34#endif /* not lint */ 35#include <sys/cdefs.h> 36__FBSDID("$FreeBSD: src/bin/cp/utils.c,v 1.46 2005/09/05 04:36:08 csjp Exp $"); 37 38#include <sys/types.h> 39#include <sys/acl.h> 40#include <sys/param.h> 41#include <sys/stat.h> 42#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED 43#include <sys/mman.h> 44#endif 45 46#include <err.h> 47#include <errno.h> 48#include <fcntl.h> 49#include <fts.h> 50#include <limits.h> 51#include <stdio.h> 52#include <stdlib.h> 53#include <sysexits.h> 54#include <unistd.h> 55 56#ifdef __APPLE__ 57#include <sys/time.h> 58#include <copyfile.h> 59#include <string.h> 60#include <sys/mount.h> 61#include <get_compat.h> 62#else 63#define COMPAT_MODE(a,b) (1) 64#endif /* __APPLE__ */ 65 66#include "extern.h" 67#define cp_pct(x,y) (int)(100.0 * (double)(x) / (double)(y)) 68 69int 70copy_file(const FTSENT *entp, int dne) 71{ 72 static char buf[MAXBSIZE]; 73 struct stat *fs; 74 int ch, checkch, from_fd, rval, to_fd; 75 ssize_t rcount; 76 ssize_t wcount; 77 size_t wresid; 78 off_t wtotal; 79 char *bufp; 80#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED 81 char *p; 82#endif 83 mode_t mode = 0; 84 struct stat to_stat; 85 86 if ((from_fd = open(entp->fts_path, O_RDONLY, 0)) == -1) { 87 warn("%s", entp->fts_path); 88 return (1); 89 } 90 91 fs = entp->fts_statp; 92 93 /* 94 * If the file exists and we're interactive, verify with the user. 95 * If the file DNE, set the mode to be the from file, minus setuid 96 * bits, modified by the umask; arguably wrong, but it makes copying 97 * executables work right and it's been that way forever. (The 98 * other choice is 666 or'ed with the execute bits on the from file 99 * modified by the umask.) 100 */ 101 if (!dne) { 102#define YESNO "(y/n [n]) " 103 if (nflag) { 104 if (vflag) 105 printf("%s not overwritten\n", to.p_path); 106 (void)close(from_fd); 107 return (1); 108 } else if (iflag) { 109 (void)fprintf(stderr, "overwrite %s? %s", 110 to.p_path, YESNO); 111 checkch = ch = getchar(); 112 while (ch != '\n' && ch != EOF) 113 ch = getchar(); 114 if (checkch != 'y' && checkch != 'Y') { 115 (void)close(from_fd); 116 (void)fprintf(stderr, "not overwritten\n"); 117 return (1); 118 } 119 } 120 121 if (COMPAT_MODE("bin/cp", "unix2003")) { 122 /* first try to overwrite existing destination file name */ 123 to_fd = open(to.p_path, O_WRONLY | O_TRUNC, 0); 124 if (to_fd == -1) { 125 if (fflag) { 126 /* Only if it fails remove file and create a new one */ 127 (void)unlink(to.p_path); 128 to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT, 129 fs->st_mode & ~(S_ISUID | S_ISGID)); 130 } 131 } 132 } else { 133 if (fflag) { 134 /* remove existing destination file name, 135 * create a new file */ 136 (void)unlink(to.p_path); 137 to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT, 138 fs->st_mode & ~(S_ISUID | S_ISGID)); 139 } else 140 /* overwrite existing destination file name */ 141 to_fd = open(to.p_path, O_WRONLY | O_TRUNC, 0); 142 } 143 } else 144 to_fd = open(to.p_path, O_WRONLY | O_TRUNC | O_CREAT, 145 fs->st_mode & ~(S_ISUID | S_ISGID)); 146 147 if (to_fd == -1) { 148 warn("%s", to.p_path); 149 (void)close(from_fd); 150 return (1); 151 } 152 153 rval = 0; 154 155#ifdef __APPLE__ 156 if (S_ISREG(fs->st_mode)) { 157 struct statfs sfs; 158 159 /* 160 * Pre-allocate blocks for the destination file if it 161 * resides on Xsan. 162 */ 163 if (fstatfs(to_fd, &sfs) == 0 && 164 strcmp(sfs.f_fstypename, "acfs") == 0) { 165 fstore_t fst; 166 167 fst.fst_flags = 0; 168 fst.fst_posmode = F_PEOFPOSMODE; 169 fst.fst_offset = 0; 170 fst.fst_length = fs->st_size; 171 172 (void) fcntl(to_fd, F_PREALLOCATE, &fst); 173 } 174 } 175#endif /* __APPLE__ */ 176 177 if (fstat(to_fd, &to_stat) != -1) { 178 mode = to_stat.st_mode; 179 if ((mode & (S_IRWXG|S_IRWXO)) 180 && fchmod(to_fd, mode & ~(S_IRWXG|S_IRWXO))) { 181 if (errno != EPERM) /* we have write access but do not own the file */ 182 warn("%s: fchmod failed", to.p_path); 183 mode = 0; 184 } 185 } else { 186 warn("%s", to.p_path); 187 } 188 /* 189 * Mmap and write if less than 8M (the limit is so we don't totally 190 * trash memory on big files. This is really a minor hack, but it 191 * wins some CPU back. 192 */ 193#ifdef VM_AND_BUFFER_CACHE_SYNCHRONIZED 194 if (S_ISREG(fs->st_mode) && fs->st_size > 0 && 195 fs->st_size <= 8 * 1048576) { 196 if ((p = mmap(NULL, (size_t)fs->st_size, PROT_READ, 197 MAP_SHARED, from_fd, (off_t)0)) == MAP_FAILED) { 198 warn("%s", entp->fts_path); 199 rval = 1; 200 } else { 201 wtotal = 0; 202 for (bufp = p, wresid = fs->st_size; ; 203 bufp += wcount, wresid -= (size_t)wcount) { 204 wcount = write(to_fd, bufp, wresid); 205 wtotal += wcount; 206 if (info) { 207 info = 0; 208 (void)fprintf(stderr, 209 "%s -> %s %3d%%\n", 210 entp->fts_path, to.p_path, 211 cp_pct(wtotal, fs->st_size)); 212 213 } 214 if (wcount >= (ssize_t)wresid || wcount <= 0) 215 break; 216 } 217 if (wcount != (ssize_t)wresid) { 218 warn("%s", to.p_path); 219 rval = 1; 220 } 221 /* Some systems don't unmap on close(2). */ 222 if (munmap(p, fs->st_size) < 0) { 223 warn("%s", entp->fts_path); 224 rval = 1; 225 } 226 } 227 } else 228#endif 229 { 230 wtotal = 0; 231 while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) { 232 for (bufp = buf, wresid = rcount; ; 233 bufp += wcount, wresid -= wcount) { 234 wcount = write(to_fd, bufp, wresid); 235 wtotal += wcount; 236 if (info) { 237 info = 0; 238 (void)fprintf(stderr, 239 "%s -> %s %3d%%\n", 240 entp->fts_path, to.p_path, 241 cp_pct(wtotal, fs->st_size)); 242 243 } 244 if (wcount >= (ssize_t)wresid || wcount <= 0) 245 break; 246 } 247 if (wcount != (ssize_t)wresid) { 248 warn("%s", to.p_path); 249 rval = 1; 250 break; 251 } 252 } 253 if (rcount < 0) { 254 warn("%s", entp->fts_path); 255 rval = 1; 256 } 257 } 258 259 /* 260 * Don't remove the target even after an error. The target might 261 * not be a regular file, or its attributes might be important, 262 * or its contents might be irreplaceable. It would only be safe 263 * to remove it if we created it and its length is 0. 264 */ 265 if (mode != 0) 266 if (fchmod(to_fd, mode)) 267 warn("%s: fchmod failed", to.p_path); 268#ifdef __APPLE__ 269 /* do these before setfile in case copyfile changes mtime */ 270 if (!Xflag && S_ISREG(fs->st_mode)) { /* skip devices, etc */ 271 if (fcopyfile(from_fd, to_fd, NULL, COPYFILE_XATTR) < 0) 272 warn("%s: could not copy extended attributes to %s", entp->fts_path, to.p_path); 273 } 274 if (pflag && setfile(fs, to_fd)) 275 rval = 1; 276 if (pflag) { 277 /* If this ACL denies writeattr then setfile will fail... */ 278 if (fcopyfile(from_fd, to_fd, NULL, COPYFILE_ACL) < 0) 279 warn("%s: could not copy ACL to %s", entp->fts_path, to.p_path); 280 } 281#else /* !__APPLE__ */ 282 if (pflag && setfile(fs, to_fd)) 283 rval = 1; 284 if (pflag && preserve_fd_acls(from_fd, to_fd) != 0) 285 rval = 1; 286#endif /* __APPLE__ */ 287 (void)close(from_fd); 288 if (close(to_fd)) { 289 warn("%s", to.p_path); 290 rval = 1; 291 } 292 return (rval); 293} 294 295int 296copy_link(const FTSENT *p, int exists) 297{ 298 ssize_t len; 299 char llink[PATH_MAX]; 300 301 if ((len = readlink(p->fts_path, llink, sizeof(llink) - 1)) == -1) { 302 warn("readlink: %s", p->fts_path); 303 return (1); 304 } 305 llink[len] = '\0'; 306 if (exists && unlink(to.p_path)) { 307 warn("unlink: %s", to.p_path); 308 return (1); 309 } 310 if (symlink(llink, to.p_path)) { 311 warn("symlink: %s", llink); 312 return (1); 313 } 314#ifdef __APPLE__ 315 if (!Xflag) 316 if (copyfile(p->fts_path, to.p_path, NULL, COPYFILE_XATTR | COPYFILE_NOFOLLOW_SRC) <0) 317 warn("%s: could not copy extended attributes to %s", 318 p->fts_path, to.p_path); 319#endif 320 return (pflag ? setfile(p->fts_statp, -1) : 0); 321} 322 323int 324copy_fifo(struct stat *from_stat, int exists) 325{ 326 if (exists && unlink(to.p_path)) { 327 warn("unlink: %s", to.p_path); 328 return (1); 329 } 330 if (mkfifo(to.p_path, from_stat->st_mode)) { 331 warn("mkfifo: %s", to.p_path); 332 return (1); 333 } 334 return (pflag ? setfile(from_stat, -1) : 0); 335} 336 337int 338copy_special(struct stat *from_stat, int exists) 339{ 340 if (exists && unlink(to.p_path)) { 341 warn("unlink: %s", to.p_path); 342 return (1); 343 } 344 if (mknod(to.p_path, from_stat->st_mode, from_stat->st_rdev)) { 345 warn("mknod: %s", to.p_path); 346 return (1); 347 } 348 return (pflag ? setfile(from_stat, -1) : 0); 349} 350 351int 352setfile(struct stat *fs, int fd) 353{ 354 static struct timeval tv[2]; 355 struct stat ts; 356 int rval, gotstat, islink, fdval; 357 358 rval = 0; 359 fdval = fd != -1; 360 islink = !fdval && S_ISLNK(fs->st_mode); 361 fs->st_mode &= S_ISUID | S_ISGID | S_ISVTX | 362 S_IRWXU | S_IRWXG | S_IRWXO; 363 364 TIMESPEC_TO_TIMEVAL(&tv[0], &fs->st_atimespec); 365 TIMESPEC_TO_TIMEVAL(&tv[1], &fs->st_mtimespec); 366#ifdef __APPLE__ 367 if (islink ? 0 : utimes(to.p_path, tv)) { 368#else 369 if (islink ? lutimes(to.p_path, tv) : utimes(to.p_path, tv)) { 370#endif /* __APPLE__ */ 371 warn("%sutimes: %s", islink ? "l" : "", to.p_path); 372 rval = 1; 373 } 374 if (fdval ? fstat(fd, &ts) : 375 (islink ? lstat(to.p_path, &ts) : stat(to.p_path, &ts))) 376 gotstat = 0; 377 else { 378 gotstat = 1; 379 ts.st_mode &= S_ISUID | S_ISGID | S_ISVTX | 380 S_IRWXU | S_IRWXG | S_IRWXO; 381 } 382 /* 383 * Changing the ownership probably won't succeed, unless we're root 384 * or POSIX_CHOWN_RESTRICTED is not set. Set uid/gid before setting 385 * the mode; current BSD behavior is to remove all setuid bits on 386 * chown. If chown fails, lose setuid/setgid bits. 387 */ 388 if (!gotstat || fs->st_uid != ts.st_uid || fs->st_gid != ts.st_gid) 389 if (fdval ? fchown(fd, fs->st_uid, fs->st_gid) : 390 (islink ? lchown(to.p_path, fs->st_uid, fs->st_gid) : 391 chown(to.p_path, fs->st_uid, fs->st_gid))) { 392 if (errno != EPERM) { 393 warn("%schown: %s", islink ? "l" : "", to.p_path); 394 rval = 1; 395 } 396 fs->st_mode &= ~(S_ISUID | S_ISGID); 397 } 398 399 if (!gotstat || fs->st_mode != ts.st_mode) 400 if (fdval ? fchmod(fd, fs->st_mode) : 401 (islink ? lchmod(to.p_path, fs->st_mode) : 402 chmod(to.p_path, fs->st_mode))) { 403 warn("%schmod: %s", islink ? "l" : "", to.p_path); 404 rval = 1; 405 } 406 407 if (!gotstat || fs->st_flags != ts.st_flags) 408 if (fdval ? 409 fchflags(fd, fs->st_flags) : 410 (islink ? lchflags(to.p_path, fs->st_flags) : 411 chflags(to.p_path, fs->st_flags))) { 412 warn("%schflags: %s", islink ? "l" : "", to.p_path); 413 rval = 1; 414 } 415 416 return (rval); 417} 418 419#ifndef __APPLE__ 420int 421preserve_fd_acls(int source_fd, int dest_fd) 422{ 423 struct acl *aclp; 424 acl_t acl; 425 426 if (fpathconf(source_fd, _PC_ACL_EXTENDED) != 1 || 427 fpathconf(dest_fd, _PC_ACL_EXTENDED) != 1) 428 return (0); 429 acl = acl_get_fd(source_fd); 430 if (acl == NULL) { 431 warn("failed to get acl entries while setting %s", to.p_path); 432 return (1); 433 } 434 aclp = &acl->ats_acl; 435 if (aclp->acl_cnt == 3) 436 return (0); 437 if (acl_set_fd(dest_fd, acl) < 0) { 438 warn("failed to set acl entries for %s", to.p_path); 439 return (1); 440 } 441 return (0); 442} 443 444int 445preserve_dir_acls(struct stat *fs, char *source_dir, char *dest_dir) 446{ 447 acl_t (*aclgetf)(const char *, acl_type_t); 448 int (*aclsetf)(const char *, acl_type_t, acl_t); 449 struct acl *aclp; 450 acl_t acl; 451 452 if (pathconf(source_dir, _PC_ACL_EXTENDED) != 1 || 453 pathconf(dest_dir, _PC_ACL_EXTENDED) != 1) 454 return (0); 455 /* 456 * If the file is a link we will not follow it 457 */ 458 if (S_ISLNK(fs->st_mode)) { 459 aclgetf = acl_get_link_np; 460 aclsetf = acl_set_link_np; 461 } else { 462 aclgetf = acl_get_file; 463 aclsetf = acl_set_file; 464 } 465 /* 466 * Even if there is no ACL_TYPE_DEFAULT entry here, a zero 467 * size ACL will be returned. So it is not safe to simply 468 * check the pointer to see if the default ACL is present. 469 */ 470 acl = aclgetf(source_dir, ACL_TYPE_DEFAULT); 471 if (acl == NULL) { 472 warn("failed to get default acl entries on %s", 473 source_dir); 474 return (1); 475 } 476 aclp = &acl->ats_acl; 477 if (aclp->acl_cnt != 0 && aclsetf(dest_dir, 478 ACL_TYPE_DEFAULT, acl) < 0) { 479 warn("failed to set default acl entries on %s", 480 dest_dir); 481 return (1); 482 } 483 acl = aclgetf(source_dir, ACL_TYPE_ACCESS); 484 if (acl == NULL) { 485 warn("failed to get acl entries on %s", source_dir); 486 return (1); 487 } 488 aclp = &acl->ats_acl; 489 if (aclsetf(dest_dir, ACL_TYPE_ACCESS, acl) < 0) { 490 warn("failed to set acl entries on %s", dest_dir); 491 return (1); 492 } 493 return (0); 494} 495#endif /* !__APPLE__ */ 496 497void 498usage(void) 499{ 500 501 if (COMPAT_MODE("bin/cp", "unix2003")) { 502 (void)fprintf(stderr, "%s\n%s\n", 503"usage: cp [-R [-H | -L | -P]] [-fi | -n] [-apvX] source_file target_file", 504" cp [-R [-H | -L | -P]] [-fi | -n] [-apvX] source_file ... " 505"target_directory"); 506 } else { 507 (void)fprintf(stderr, "%s\n%s\n", 508"usage: cp [-R [-H | -L | -P]] [-f | -i | -n] [-apvX] source_file target_file", 509" cp [-R [-H | -L | -P]] [-f | -i | -n] [-apvX] source_file ... " 510"target_directory"); 511 } 512 exit(EX_USAGE); 513} 514