xinstall.c revision 1.103
1 /* $NetBSD: xinstall.c,v 1.103 2008/07/21 14:19:28 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1987, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #if HAVE_NBTOOL_CONFIG_H 33 #include "nbtool_config.h" 34 #else 35 #define HAVE_FUTIMES 1 36 #define HAVE_STRUCT_STAT_ST_FLAGS 1 37 #endif 38 39 #include <sys/cdefs.h> 40 #if defined(__COPYRIGHT) && !defined(lint) 41 __COPYRIGHT("@(#) Copyright (c) 1987, 1993\ 42 The Regents of the University of California. All rights reserved."); 43 #endif /* not lint */ 44 45 #if defined(__RCSID) && !defined(lint) 46 #if 0 47 static char sccsid[] = "@(#)xinstall.c 8.1 (Berkeley) 7/21/93"; 48 #else 49 __RCSID("$NetBSD: xinstall.c,v 1.103 2008/07/21 14:19:28 lukem Exp $"); 50 #endif 51 #endif /* not lint */ 52 53 #define __MKTEMP_OK__ /* All uses of mktemp have been checked */ 54 #include <sys/param.h> 55 #include <sys/mman.h> 56 #include <sys/stat.h> 57 #include <sys/wait.h> 58 59 #include <ctype.h> 60 #include <err.h> 61 #include <errno.h> 62 #include <fcntl.h> 63 #include <grp.h> 64 #include <libgen.h> 65 #include <paths.h> 66 #include <pwd.h> 67 #include <stdio.h> 68 #include <stdlib.h> 69 #include <string.h> 70 #include <unistd.h> 71 #include <util.h> 72 #include <vis.h> 73 74 #include <md5.h> 75 #include <rmd160.h> 76 #include <sha1.h> 77 78 #include "pathnames.h" 79 #include "mtree.h" 80 81 #define STRIP_ARGS_MAX 32 82 #define BACKUP_SUFFIX ".old" 83 84 int dobackup, dodir, dostrip, dolink, dopreserve, dorename, dounpriv; 85 int numberedbackup; 86 int mode = S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 87 char pathbuf[MAXPATHLEN]; 88 id_t uid = -1, gid = -1; 89 char *group, *owner, *fflags, *tags; 90 FILE *metafp; 91 char *metafile; 92 u_long fileflags; 93 char *stripArgs; 94 char *afterinstallcmd; 95 char *suffix = BACKUP_SUFFIX; 96 char *destdir; 97 98 enum { 99 DIGEST_NONE = 0, 100 DIGEST_MD5, 101 DIGEST_RMD160, 102 DIGEST_SHA1, 103 } digesttype = DIGEST_NONE; 104 char *digest; 105 106 #define LN_ABSOLUTE 0x01 107 #define LN_RELATIVE 0x02 108 #define LN_HARD 0x04 109 #define LN_SYMBOLIC 0x08 110 #define LN_MIXED 0x10 111 112 #define DIRECTORY 0x01 /* Tell install it's a directory. */ 113 #define SETFLAGS 0x02 /* Tell install to set flags. */ 114 #define HASUID 0x04 /* Tell install the uid was given */ 115 #define HASGID 0x08 /* Tell install the gid was given */ 116 117 void afterinstall(const char *, const char *, int); 118 void backup(const char *); 119 char *copy(int, char *, int, char *, off_t); 120 int do_link(char *, char *); 121 void do_symlink(char *, char *); 122 void install(char *, char *, u_int); 123 void install_dir(char *, u_int); 124 int main(int, char *[]); 125 void makelink(char *, char *); 126 void metadata_log(const char *, const char *, struct timeval *, 127 const char *, const char *); 128 int parseid(char *, id_t *); 129 void strip(char *); 130 void usage(void); 131 char *xbasename(char *); 132 char *xdirname(char *); 133 134 int 135 main(int argc, char *argv[]) 136 { 137 struct stat from_sb, to_sb; 138 void *set; 139 u_int iflags; 140 int ch, no_target; 141 char *p, *to_name; 142 143 setprogname(argv[0]); 144 145 iflags = 0; 146 while ((ch = getopt(argc, argv, "a:cbB:dD:f:g:h:l:m:M:N:o:prsS:T:U")) 147 != -1) 148 switch((char)ch) { 149 case 'a': 150 afterinstallcmd = strdup(optarg); 151 if (afterinstallcmd == NULL) 152 errx(1, "%s", strerror(ENOMEM)); 153 break; 154 case 'B': 155 suffix = optarg; 156 numberedbackup = 0; 157 { 158 /* Check if given suffix really generates 159 different suffixes - catch e.g. ".%" */ 160 char suffix_expanded0[FILENAME_MAX], 161 suffix_expanded1[FILENAME_MAX]; 162 (void)snprintf(suffix_expanded0, FILENAME_MAX, 163 suffix, 0); 164 (void)snprintf(suffix_expanded1, FILENAME_MAX, 165 suffix, 1); 166 if (strcmp(suffix_expanded0, suffix_expanded1) 167 != 0) 168 numberedbackup = 1; 169 } 170 /* fall through; -B implies -b */ 171 /*FALLTHROUGH*/ 172 case 'b': 173 dobackup = 1; 174 break; 175 case 'c': 176 /* ignored; was "docopy" which is now the default. */ 177 break; 178 case 'd': 179 dodir = 1; 180 break; 181 case 'D': 182 destdir = optarg; 183 break; 184 #if ! HAVE_NBTOOL_CONFIG_H 185 case 'f': 186 fflags = optarg; 187 break; 188 #endif 189 case 'g': 190 group = optarg; 191 break; 192 case 'h': 193 digest = optarg; 194 break; 195 case 'l': 196 for (p = optarg; *p; p++) 197 switch (*p) { 198 case 's': 199 dolink &= ~(LN_HARD|LN_MIXED); 200 dolink |= LN_SYMBOLIC; 201 break; 202 case 'h': 203 dolink &= ~(LN_SYMBOLIC|LN_MIXED); 204 dolink |= LN_HARD; 205 break; 206 case 'm': 207 dolink &= ~(LN_SYMBOLIC|LN_HARD); 208 dolink |= LN_MIXED; 209 break; 210 case 'a': 211 dolink &= ~LN_RELATIVE; 212 dolink |= LN_ABSOLUTE; 213 break; 214 case 'r': 215 dolink &= ~LN_ABSOLUTE; 216 dolink |= LN_RELATIVE; 217 break; 218 default: 219 errx(1, "%c: invalid link type", *p); 220 /* NOTREACHED */ 221 } 222 break; 223 case 'm': 224 if (!(set = setmode(optarg))) 225 err(1, "Cannot set file mode `%s'", optarg); 226 mode = getmode(set, 0); 227 free(set); 228 break; 229 case 'M': 230 metafile = optarg; 231 break; 232 case 'N': 233 if (! setup_getid(optarg)) 234 errx(1, 235 "Unable to use user and group databases in `%s'", 236 optarg); 237 break; 238 case 'o': 239 owner = optarg; 240 break; 241 case 'p': 242 dopreserve = 1; 243 break; 244 case 'r': 245 dorename = 1; 246 break; 247 case 'S': 248 stripArgs = strdup(optarg); 249 if (stripArgs == NULL) 250 errx(1, "%s", strerror(ENOMEM)); 251 /* fall through; -S implies -s */ 252 /*FALLTHROUGH*/ 253 case 's': 254 dostrip = 1; 255 break; 256 case 'T': 257 tags = optarg; 258 break; 259 case 'U': 260 dounpriv = 1; 261 break; 262 case '?': 263 default: 264 usage(); 265 } 266 argc -= optind; 267 argv += optind; 268 269 /* strip and link options make no sense when creating directories */ 270 if ((dostrip || dolink) && dodir) 271 usage(); 272 273 /* strip and flags make no sense with links */ 274 if ((dostrip || fflags) && dolink) 275 usage(); 276 277 /* must have at least two arguments, except when creating directories */ 278 if (argc < 2 && !dodir) 279 usage(); 280 281 if (digest) { 282 if (0) { 283 } else if (strcmp(digest, "none") == 0) { 284 digesttype = DIGEST_NONE; 285 } else if (strcmp(digest, "md5") == 0) { 286 digesttype = DIGEST_MD5; 287 } else if (strcmp(digest, "rmd160") == 0) { 288 digesttype = DIGEST_RMD160; 289 } else if (strcmp(digest, "sha1") == 0) { 290 digesttype = DIGEST_SHA1; 291 } else { 292 warnx("unknown digest `%s'", digest); 293 usage(); 294 } 295 } 296 297 /* get group and owner id's */ 298 if (group && !dounpriv) { 299 if (gid_from_group(group, &gid) == -1 && ! parseid(group, &gid)) 300 errx(1, "unknown group %s", group); 301 iflags |= HASGID; 302 } 303 if (owner && !dounpriv) { 304 if (uid_from_user(owner, &uid) == -1 && ! parseid(owner, &uid)) 305 errx(1, "unknown user %s", owner); 306 iflags |= HASUID; 307 } 308 309 #if ! HAVE_NBTOOL_CONFIG_H 310 if (fflags && !dounpriv) { 311 if (string_to_flags(&fflags, &fileflags, NULL)) 312 errx(1, "%s: invalid flag", fflags); 313 /* restore fflags since string_to_flags() changed it */ 314 fflags = flags_to_string(fileflags, "-"); 315 iflags |= SETFLAGS; 316 } 317 #endif 318 319 if (metafile) { 320 if ((metafp = fopen(metafile, "a")) == NULL) 321 warn("open %s", metafile); 322 } else 323 digesttype = DIGEST_NONE; 324 325 if (dodir) { 326 for (; *argv != NULL; ++argv) 327 install_dir(*argv, iflags); 328 exit (0); 329 } 330 331 no_target = stat(to_name = argv[argc - 1], &to_sb); 332 if (!no_target && S_ISDIR(to_sb.st_mode)) { 333 for (; *argv != to_name; ++argv) 334 install(*argv, to_name, iflags | DIRECTORY); 335 exit(0); 336 } 337 338 /* can't do file1 file2 directory/file */ 339 if (argc != 2) { 340 errx(EXIT_FAILURE, "the last argument (%s) " 341 "must name an existing directory", argv[argc - 1]); 342 /* NOTREACHED */ 343 } 344 345 if (!no_target) { 346 /* makelink() handles checks for links */ 347 if (!dolink) { 348 if (stat(*argv, &from_sb)) 349 err(1, "%s: stat", *argv); 350 if (!S_ISREG(to_sb.st_mode)) 351 errx(1, "%s: not a regular file", to_name); 352 if (to_sb.st_dev == from_sb.st_dev && 353 to_sb.st_ino == from_sb.st_ino) 354 errx(1, "%s and %s are the same file", *argv, 355 to_name); 356 } 357 /* 358 * Unlink now... avoid ETXTBSY errors later. Try and turn 359 * off the append/immutable bits -- if we fail, go ahead, 360 * it might work. 361 */ 362 #if ! HAVE_NBTOOL_CONFIG_H 363 #define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND) 364 if (to_sb.st_flags & NOCHANGEBITS) 365 (void)chflags(to_name, 366 to_sb.st_flags & ~(NOCHANGEBITS)); 367 #endif 368 if (dobackup) 369 backup(to_name); 370 else if (!dorename) 371 (void)unlink(to_name); 372 } 373 install(*argv, to_name, iflags); 374 exit(0); 375 } 376 377 /* 378 * parseid -- 379 * parse uid or gid from arg into id, returning non-zero if successful 380 */ 381 int 382 parseid(char *name, id_t *id) 383 { 384 char *ep; 385 386 errno = 0; 387 *id = (id_t)strtoul(name, &ep, 10); 388 if (errno || *ep != '\0') 389 return (0); 390 return (1); 391 } 392 393 /* 394 * do_link -- 395 * make a hard link, obeying dorename if set 396 * return -1 on failure 397 */ 398 int 399 do_link(char *from_name, char *to_name) 400 { 401 char tmpl[MAXPATHLEN]; 402 int ret; 403 404 if (dorename) { 405 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 406 xdirname(to_name)); 407 /* This usage is safe. */ 408 if (mktemp(tmpl) == NULL) 409 err(1, "%s: mktemp", tmpl); 410 ret = link(from_name, tmpl); 411 if (ret == 0) { 412 ret = rename(tmpl, to_name); 413 /* If rename has posix semantics, then the temporary 414 * file may still exist when from_name and to_name point 415 * to the same file, so unlink it unconditionally. 416 */ 417 (void)unlink(tmpl); 418 } 419 return (ret); 420 } else 421 return (link(from_name, to_name)); 422 } 423 424 /* 425 * do_symlink -- 426 * make a symbolic link, obeying dorename if set 427 * exit on failure 428 */ 429 void 430 do_symlink(char *from_name, char *to_name) 431 { 432 char tmpl[MAXPATHLEN]; 433 434 if (dorename) { 435 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 436 xdirname(to_name)); 437 /* This usage is safe. */ 438 if (mktemp(tmpl) == NULL) 439 err(1, "%s: mktemp", tmpl); 440 441 if (symlink(from_name, tmpl) == -1) 442 err(1, "symlink %s -> %s", from_name, tmpl); 443 if (rename(tmpl, to_name) == -1) { 444 /* remove temporary link before exiting */ 445 (void)unlink(tmpl); 446 err(1, "%s: rename", to_name); 447 } 448 } else { 449 if (symlink(from_name, to_name) == -1) 450 err(1, "symlink %s -> %s", from_name, to_name); 451 } 452 } 453 454 /* 455 * makelink -- 456 * make a link from source to destination 457 */ 458 void 459 makelink(char *from_name, char *to_name) 460 { 461 char src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN]; 462 struct stat to_sb; 463 464 /* Try hard links first */ 465 if (dolink & (LN_HARD|LN_MIXED)) { 466 if (do_link(from_name, to_name) == -1) { 467 if ((dolink & LN_HARD) || errno != EXDEV) 468 err(1, "link %s -> %s", from_name, to_name); 469 } else { 470 if (stat(to_name, &to_sb)) 471 err(1, "%s: stat", to_name); 472 if (S_ISREG(to_sb.st_mode)) { 473 /* XXX: only metalog hardlinked files */ 474 int omode; 475 char *oowner, *ogroup, *offlags; 476 char *dres; 477 478 /* XXX: use underlying perms */ 479 omode = mode; 480 mode = (to_sb.st_mode & 0777); 481 oowner = owner; 482 owner = NULL; 483 ogroup = group; 484 group = NULL; 485 offlags = fflags; 486 fflags = NULL; 487 switch (digesttype) { 488 case DIGEST_MD5: 489 dres = MD5File(from_name, NULL); 490 break; 491 case DIGEST_RMD160: 492 dres = RMD160File(from_name, NULL); 493 break; 494 case DIGEST_SHA1: 495 dres = SHA1File(from_name, NULL); 496 break; 497 default: 498 dres = NULL; 499 } 500 metadata_log(to_name, "file", NULL, NULL, dres); 501 free(dres); 502 mode = omode; 503 owner = oowner; 504 group = ogroup; 505 fflags = offlags; 506 } 507 return; 508 } 509 } 510 511 /* Symbolic links */ 512 if (dolink & LN_ABSOLUTE) { 513 /* Convert source path to absolute */ 514 if (realpath(from_name, src) == NULL) 515 err(1, "%s: realpath", from_name); 516 do_symlink(src, to_name); 517 /* XXX: src may point outside of destdir */ 518 metadata_log(to_name, "link", NULL, src, NULL); 519 return; 520 } 521 522 if (dolink & LN_RELATIVE) { 523 char *cp, *d, *s; 524 525 /* Resolve pathnames */ 526 if (realpath(from_name, src) == NULL) 527 err(1, "%s: realpath", from_name); 528 529 /* 530 * The last component of to_name may be a symlink, 531 * so use realpath to resolve only the directory. 532 */ 533 cp = xdirname(to_name); 534 if (realpath(cp, dst) == NULL) 535 err(1, "%s: realpath", cp); 536 /* .. and add the last component */ 537 if (strcmp(dst, "/") != 0) { 538 if (strlcat(dst, "/", sizeof(dst)) > sizeof(dst)) 539 errx(1, "resolved pathname too long"); 540 } 541 cp = xbasename(to_name); 542 if (strlcat(dst, cp, sizeof(dst)) > sizeof(dst)) 543 errx(1, "resolved pathname too long"); 544 545 /* trim common path components */ 546 for (s = src, d = dst; *s == *d; s++, d++) 547 continue; 548 while (*s != '/') 549 s--, d--; 550 551 /* count the number of directories we need to backtrack */ 552 for (++d, lnk[0] = '\0'; *d; d++) 553 if (*d == '/') 554 (void)strlcat(lnk, "../", sizeof(lnk)); 555 556 (void)strlcat(lnk, ++s, sizeof(lnk)); 557 558 do_symlink(lnk, to_name); 559 /* XXX: lnk may point outside of destdir */ 560 metadata_log(to_name, "link", NULL, lnk, NULL); 561 return; 562 } 563 564 /* 565 * If absolute or relative was not specified, 566 * try the names the user provided 567 */ 568 do_symlink(from_name, to_name); 569 /* XXX: from_name may point outside of destdir */ 570 metadata_log(to_name, "link", NULL, from_name, NULL); 571 } 572 573 /* 574 * install -- 575 * build a path name and install the file 576 */ 577 void 578 install(char *from_name, char *to_name, u_int flags) 579 { 580 struct stat from_sb; 581 #if ! HAVE_NBTOOL_CONFIG_H 582 struct stat to_sb; 583 #endif 584 struct timeval tv[2]; 585 int devnull, from_fd, to_fd, serrno, tmpmode; 586 char *p, tmpl[MAXPATHLEN], *oto_name, *digestresult; 587 588 if (!dolink) { 589 /* ensure that from_sb & tv are sane if !dolink */ 590 if (stat(from_name, &from_sb)) 591 err(1, "%s: stat", from_name); 592 #if BSD4_4 && !HAVE_NBTOOL_CONFIG_H 593 TIMESPEC_TO_TIMEVAL(&tv[0], &from_sb.st_atimespec); 594 TIMESPEC_TO_TIMEVAL(&tv[1], &from_sb.st_mtimespec); 595 #else 596 tv[0].tv_sec = from_sb.st_atime; 597 tv[0].tv_usec = 0; 598 tv[1].tv_sec = from_sb.st_mtime; 599 tv[1].tv_usec = 0; 600 #endif 601 } 602 603 if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) { 604 if (!dolink) { 605 if (!S_ISREG(from_sb.st_mode)) 606 errx(1, "%s: not a regular file", from_name); 607 } 608 /* Build the target path. */ 609 if (flags & DIRECTORY) { 610 (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s", 611 to_name, 612 (p = strrchr(from_name, '/')) ? ++p : from_name); 613 to_name = pathbuf; 614 } 615 devnull = 0; 616 } else { 617 #if HAVE_STRUCT_STAT_ST_FLAGS 618 from_sb.st_flags = 0; /* XXX */ 619 #endif 620 devnull = 1; 621 } 622 623 /* 624 * Unlink now... avoid ETXTBSY errors later. Try and turn 625 * off the append/immutable bits -- if we fail, go ahead, 626 * it might work. 627 */ 628 #if ! HAVE_NBTOOL_CONFIG_H 629 if (stat(to_name, &to_sb) == 0 && 630 to_sb.st_flags & (NOCHANGEBITS)) 631 (void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS)); 632 #endif 633 if (dorename) { 634 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 635 xdirname(to_name)); 636 oto_name = to_name; 637 to_name = tmpl; 638 } else { 639 oto_name = NULL; /* pacify gcc */ 640 if (dobackup) 641 backup(to_name); 642 else 643 (void)unlink(to_name); 644 } 645 646 if (dolink) { 647 makelink(from_name, dorename ? oto_name : to_name); 648 return; 649 } 650 651 /* Create target. */ 652 if (dorename) { 653 if ((to_fd = mkstemp(to_name)) == -1) 654 err(1, "%s: mkstemp", to_name); 655 } else { 656 if ((to_fd = open(to_name, 657 O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0) 658 err(1, "%s: open", to_name); 659 } 660 digestresult = NULL; 661 if (!devnull) { 662 if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) { 663 (void)unlink(to_name); 664 err(1, "%s: open", from_name); 665 } 666 digestresult = 667 copy(from_fd, from_name, to_fd, to_name, from_sb.st_size); 668 (void)close(from_fd); 669 } 670 671 if (dostrip) { 672 strip(to_name); 673 674 /* 675 * Re-open our fd on the target, in case we used a strip 676 * that does not work in-place -- like gnu binutils strip. 677 */ 678 close(to_fd); 679 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 680 err(1, "stripping %s", to_name); 681 } 682 683 if (afterinstallcmd != NULL) { 684 afterinstall(afterinstallcmd, to_name, 1); 685 686 /* 687 * Re-open our fd on the target, in case we used an 688 * after-install command that does not work in-place 689 */ 690 close(to_fd); 691 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 692 err(1, "running after install command on %s", to_name); 693 } 694 695 /* 696 * Set owner, group, mode for target; do the chown first, 697 * chown may lose the setuid bits. 698 */ 699 if (!dounpriv && 700 (flags & (HASUID | HASGID)) && fchown(to_fd, uid, gid) == -1) { 701 serrno = errno; 702 (void)unlink(to_name); 703 errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno)); 704 } 705 tmpmode = mode; 706 if (dounpriv) 707 tmpmode &= S_IRWXU|S_IRWXG|S_IRWXO; 708 if (fchmod(to_fd, tmpmode) == -1) { 709 serrno = errno; 710 (void)unlink(to_name); 711 errx(1, "%s: chmod: %s", to_name, strerror(serrno)); 712 } 713 714 /* 715 * Preserve the date of the source file. 716 */ 717 if (dopreserve) { 718 #if HAVE_FUTIMES 719 if (futimes(to_fd, tv) == -1) 720 warn("%s: futimes", to_name); 721 #else 722 if (utimes(to_name, tv) == -1) 723 warn("%s: utimes", to_name); 724 #endif 725 } 726 727 (void)close(to_fd); 728 729 if (dorename) { 730 if (rename(to_name, oto_name) == -1) 731 err(1, "%s: rename", to_name); 732 to_name = oto_name; 733 } 734 735 /* 736 * If provided a set of flags, set them, otherwise, preserve the 737 * flags, except for the dump flag. 738 */ 739 #if ! HAVE_NBTOOL_CONFIG_H 740 if (!dounpriv && chflags(to_name, 741 flags & SETFLAGS ? fileflags : from_sb.st_flags & ~UF_NODUMP) == -1) 742 { 743 if (errno != EOPNOTSUPP || (from_sb.st_flags & ~UF_NODUMP) != 0) 744 warn("%s: chflags", to_name); 745 } 746 #endif 747 748 metadata_log(to_name, "file", tv, NULL, digestresult); 749 free(digestresult); 750 } 751 752 /* 753 * copy -- 754 * copy from one file to another 755 */ 756 char * 757 copy(int from_fd, char *from_name, int to_fd, char *to_name, off_t size) 758 { 759 ssize_t nr, nw; 760 int serrno; 761 u_char *p; 762 u_char buf[MAXBSIZE]; 763 MD5_CTX ctxMD5; 764 RMD160_CTX ctxRMD160; 765 SHA1_CTX ctxSHA1; 766 767 switch (digesttype) { 768 case DIGEST_MD5: 769 MD5Init(&ctxMD5); 770 break; 771 case DIGEST_RMD160: 772 RMD160Init(&ctxRMD160); 773 break; 774 case DIGEST_SHA1: 775 SHA1Init(&ctxSHA1); 776 break; 777 case DIGEST_NONE: 778 default: 779 break; 780 } 781 /* 782 * There's no reason to do anything other than close the file 783 * now if it's empty, so let's not bother. 784 */ 785 if (size > 0) { 786 787 /* 788 * Mmap and write if less than 8M (the limit is so we 789 * don't totally trash memory on big files). This is 790 * really a minor hack, but it wins some CPU back. 791 */ 792 793 if (size <= 8 * 1048576) { 794 if ((p = mmap(NULL, (size_t)size, PROT_READ, 795 MAP_FILE|MAP_SHARED, from_fd, (off_t)0)) 796 == MAP_FAILED) { 797 goto mmap_failed; 798 } 799 #if defined(MADV_SEQUENTIAL) && !defined(__APPLE__) 800 if (madvise(p, (size_t)size, MADV_SEQUENTIAL) == -1 801 && errno != EOPNOTSUPP) 802 warnx("madvise: %s", strerror(errno)); 803 #endif 804 805 if (write(to_fd, p, size) != size) { 806 serrno = errno; 807 (void)unlink(to_name); 808 errx(1, "%s: write: %s", 809 to_name, strerror(serrno)); 810 } 811 switch (digesttype) { 812 case DIGEST_MD5: 813 MD5Update(&ctxMD5, p, size); 814 break; 815 case DIGEST_RMD160: 816 RMD160Update(&ctxRMD160, p, size); 817 break; 818 case DIGEST_SHA1: 819 SHA1Update(&ctxSHA1, p, size); 820 break; 821 default: 822 break; 823 } 824 (void)munmap(p, size); 825 } else { 826 mmap_failed: 827 while ((nr = read(from_fd, buf, sizeof(buf))) > 0) { 828 if ((nw = write(to_fd, buf, nr)) != nr) { 829 serrno = errno; 830 (void)unlink(to_name); 831 errx(1, "%s: write: %s", to_name, 832 strerror(nw > 0 ? EIO : serrno)); 833 } 834 switch (digesttype) { 835 case DIGEST_MD5: 836 MD5Update(&ctxMD5, buf, nr); 837 break; 838 case DIGEST_RMD160: 839 RMD160Update(&ctxRMD160, buf, nr); 840 break; 841 case DIGEST_SHA1: 842 SHA1Update(&ctxSHA1, buf, nr); 843 break; 844 default: 845 break; 846 } 847 } 848 if (nr != 0) { 849 serrno = errno; 850 (void)unlink(to_name); 851 errx(1, "%s: read: %s", from_name, strerror(serrno)); 852 } 853 } 854 } 855 switch (digesttype) { 856 case DIGEST_MD5: 857 return MD5End(&ctxMD5, NULL); 858 case DIGEST_RMD160: 859 return RMD160End(&ctxRMD160, NULL); 860 case DIGEST_SHA1: 861 return SHA1End(&ctxSHA1, NULL); 862 default: 863 return NULL; 864 } 865 } 866 867 /* 868 * strip -- 869 * use strip(1) to strip the target file 870 */ 871 void 872 strip(char *to_name) 873 { 874 static const char exec_failure[] = ": exec of strip failed: "; 875 int serrno, status; 876 const char *stripprog, *progname; 877 char *cmd; 878 879 if ((stripprog = getenv("STRIP")) == NULL) { 880 #ifdef TARGET_STRIP 881 stripprog = TARGET_STRIP; 882 #else 883 stripprog = _PATH_STRIP; 884 #endif 885 } 886 887 cmd = NULL; 888 889 if (stripArgs) { 890 /* 891 * Build up a command line and let /bin/sh 892 * parse the arguments. 893 */ 894 int ret = asprintf(&cmd, "%s %s %s", stripprog, stripArgs, 895 to_name); 896 897 if (ret == -1 || cmd == NULL) 898 err(1, "asprintf failed"); 899 } 900 901 switch (vfork()) { 902 case -1: 903 serrno = errno; 904 (void)unlink(to_name); 905 errx(1, "vfork: %s", strerror(serrno)); 906 /*NOTREACHED*/ 907 case 0: 908 909 if (stripArgs) 910 execl(_PATH_BSHELL, "sh", "-c", cmd, NULL); 911 else 912 execlp(stripprog, "strip", to_name, NULL); 913 914 progname = getprogname(); 915 write(STDERR_FILENO, progname, strlen(progname)); 916 write(STDERR_FILENO, exec_failure, strlen(exec_failure)); 917 write(STDERR_FILENO, stripprog, strlen(stripprog)); 918 write(STDERR_FILENO, "\n", 1); 919 _exit(1); 920 /*NOTREACHED*/ 921 default: 922 if (wait(&status) == -1 || status) 923 (void)unlink(to_name); 924 } 925 926 free(cmd); 927 } 928 929 /* 930 * afterinstall -- 931 * run provided command on the target file or directory after it's been 932 * installed and stripped, but before permissions are set or it's renamed 933 */ 934 void 935 afterinstall(const char *command, const char *to_name, int errunlink) 936 { 937 int serrno, status; 938 char *cmd; 939 940 switch (vfork()) { 941 case -1: 942 serrno = errno; 943 if (errunlink) 944 (void)unlink(to_name); 945 errx(1, "vfork: %s", strerror(serrno)); 946 /*NOTREACHED*/ 947 case 0: 948 /* 949 * build up a command line and let /bin/sh 950 * parse the arguments 951 */ 952 cmd = (char*)malloc(sizeof(char)* 953 (2+strlen(command)+ 954 strlen(to_name))); 955 956 if (cmd == NULL) 957 errx(1, "%s", strerror(ENOMEM)); 958 959 sprintf(cmd, "%s %s", command, to_name); 960 961 execl(_PATH_BSHELL, "sh", "-c", cmd, NULL); 962 963 warn("%s: exec of after install command", command); 964 _exit(1); 965 /*NOTREACHED*/ 966 default: 967 if ((wait(&status) == -1 || status) && errunlink) 968 (void)unlink(to_name); 969 } 970 } 971 972 /* 973 * backup -- 974 * backup file "to_name" to to_name.suffix 975 * if suffix contains a "%", it's taken as a printf(3) pattern 976 * used for a numbered backup. 977 */ 978 void 979 backup(const char *to_name) 980 { 981 char bname[FILENAME_MAX]; 982 983 if (numberedbackup) { 984 /* Do numbered backup */ 985 int cnt; 986 char suffix_expanded[FILENAME_MAX]; 987 988 cnt=0; 989 do { 990 (void)snprintf(suffix_expanded, FILENAME_MAX, suffix, 991 cnt); 992 (void)snprintf(bname, FILENAME_MAX, "%s%s", to_name, 993 suffix_expanded); 994 cnt++; 995 } while (access(bname, F_OK) == 0); 996 } else { 997 /* Do simple backup */ 998 (void)snprintf(bname, FILENAME_MAX, "%s%s", to_name, suffix); 999 } 1000 1001 (void)rename(to_name, bname); 1002 } 1003 1004 /* 1005 * install_dir -- 1006 * build directory hierarchy 1007 */ 1008 void 1009 install_dir(char *path, u_int flags) 1010 { 1011 char *p; 1012 struct stat sb; 1013 int ch; 1014 1015 for (p = path;; ++p) 1016 if (!*p || (p != path && *p == '/')) { 1017 ch = *p; 1018 *p = '\0'; 1019 if (stat(path, &sb)) { 1020 if (errno != ENOENT || mkdir(path, 0777) < 0) { 1021 err(1, "%s: mkdir", path); 1022 } 1023 } 1024 else if (!S_ISDIR(sb.st_mode)) { 1025 errx(1, "%s exists but is not a directory", path); 1026 } 1027 if (!(*p = ch)) 1028 break; 1029 } 1030 1031 if (afterinstallcmd != NULL) 1032 afterinstall(afterinstallcmd, path, 0); 1033 1034 if (!dounpriv && ( 1035 ((flags & (HASUID | HASGID)) && chown(path, uid, gid) == -1) 1036 || chmod(path, mode) == -1 )) { 1037 warn("%s: chown/chmod", path); 1038 } 1039 metadata_log(path, "dir", NULL, NULL, NULL); 1040 } 1041 1042 /* 1043 * metadata_log -- 1044 * if metafp is not NULL, output mtree(8) full path name and settings to 1045 * metafp, to allow permissions to be set correctly by other tools. 1046 */ 1047 void 1048 metadata_log(const char *path, const char *type, struct timeval *tv, 1049 const char *link, const char *digestresult) 1050 { 1051 static const char extra[] = { ' ', '\t', '\n', '\\', '#', '\0' }; 1052 const char *p; 1053 char *buf; 1054 size_t destlen; 1055 struct flock metalog_lock; 1056 1057 if (!metafp) 1058 return; 1059 buf = (char *)malloc(4 * strlen(path) + 1); /* buf for strsvis(3) */ 1060 if (buf == NULL) { 1061 warnx("%s", strerror(ENOMEM)); 1062 return; 1063 } 1064 /* lock log file */ 1065 metalog_lock.l_start = 0; 1066 metalog_lock.l_len = 0; 1067 metalog_lock.l_whence = SEEK_SET; 1068 metalog_lock.l_type = F_WRLCK; 1069 if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) { 1070 warn("can't lock %s", metafile); 1071 free(buf); 1072 return; 1073 } 1074 1075 p = path; /* remove destdir */ 1076 if (destdir) { 1077 destlen = strlen(destdir); 1078 if (strncmp(p, destdir, destlen) == 0 && 1079 (p[destlen] == '/' || p[destlen] == '\0')) 1080 p += destlen; 1081 } 1082 while (*p && *p == '/') /* remove leading /s */ 1083 p++; 1084 strsvis(buf, p, VIS_CSTYLE, extra); /* encode name */ 1085 p = buf; 1086 /* print details */ 1087 fprintf(metafp, ".%s%s type=%s mode=%#o", *p ? "/" : "", p, type, mode); 1088 if (link) { 1089 strsvis(buf, link, VIS_CSTYLE, extra); /* encode link */ 1090 fprintf(metafp, " link=%s", buf); 1091 } 1092 if (owner) 1093 fprintf(metafp, " uname=%s", owner); 1094 if (group) 1095 fprintf(metafp, " gname=%s", group); 1096 if (fflags) 1097 fprintf(metafp, " flags=%s", fflags); 1098 if (tags) 1099 fprintf(metafp, " tags=%s", tags); 1100 if (tv != NULL && dopreserve) 1101 fprintf(metafp, " time=%ld.%ld", tv[1].tv_sec, tv[1].tv_usec); 1102 if (digestresult && digest) 1103 fprintf(metafp, " %s=%s", digest, digestresult); 1104 fputc('\n', metafp); 1105 fflush(metafp); /* flush output */ 1106 /* unlock log file */ 1107 metalog_lock.l_type = F_UNLCK; 1108 if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) { 1109 warn("can't unlock %s", metafile); 1110 } 1111 free(buf); 1112 } 1113 1114 /* 1115 * xbasename -- 1116 * libc basename(3) that returns a pointer to a static buffer 1117 * instead of overwriting that passed-in string. 1118 */ 1119 char * 1120 xbasename(char *path) 1121 { 1122 static char tmp[MAXPATHLEN]; 1123 1124 (void)strlcpy(tmp, path, sizeof(tmp)); 1125 return (basename(tmp)); 1126 } 1127 1128 /* 1129 * xdirname -- 1130 * libc dirname(3) that returns a pointer to a static buffer 1131 * instead of overwriting that passed-in string. 1132 */ 1133 char * 1134 xdirname(char *path) 1135 { 1136 static char tmp[MAXPATHLEN]; 1137 1138 (void)strlcpy(tmp, path, sizeof(tmp)); 1139 return (dirname(tmp)); 1140 } 1141 1142 /* 1143 * usage -- 1144 * print a usage message and die 1145 */ 1146 void 1147 usage(void) 1148 { 1149 const char *prog; 1150 1151 prog = getprogname(); 1152 1153 (void)fprintf(stderr, 1154 "usage: %s [-Ubcprs] [-M log] [-D dest] [-T tags] [-B suffix]\n" 1155 " [-a aftercmd] [-f flags] [-m mode] [-N dbdir] [-o owner] [-g group] \n" 1156 " [-l linkflags] [-h hash] [-S stripflags] file1 file2\n" 1157 " %s [-Ubcprs] [-M log] [-D dest] [-T tags] [-B suffix]\n" 1158 " [-a aftercmd] [-f flags] [-m mode] [-N dbdir] [-o owner] [-g group]\n" 1159 " [-l linkflags] [-h hash] [-S stripflags] file1 ... fileN directory\n" 1160 " %s -d [-Up] [-M log] [-D dest] [-T tags] [-a aftercmd] [-m mode]\n" 1161 " [-N dbdir] [-o owner] [-g group] directory ...\n", 1162 prog, prog, prog); 1163 exit(1); 1164 } 1165
Indexes created Fri Sep 26 20:09:58 GMT 2025