xinstall.c revision 1.96
1 /* $NetBSD: xinstall.c,v 1.96 2006/09/11 22:24:09 dbj 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\n\ 42 The Regents of the University of California. All rights reserved.\n"); 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 1.96 2006/09/11 22:24:09 dbj 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 <vis.h> 72 73 #include <md5.h> 74 #include <crypto/rmd160.h> 75 #include <sha1.h> 76 77 #include "pathnames.h" 78 #include "stat_flags.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 iflags |= SETFLAGS; 314 } 315 #endif 316 317 if (metafile) { 318 if ((metafp = fopen(metafile, "a")) == NULL) 319 warn("open %s", metafile); 320 } else 321 digesttype = DIGEST_NONE; 322 323 if (dodir) { 324 for (; *argv != NULL; ++argv) 325 install_dir(*argv, iflags); 326 exit (0); 327 } 328 329 no_target = stat(to_name = argv[argc - 1], &to_sb); 330 if (!no_target && S_ISDIR(to_sb.st_mode)) { 331 for (; *argv != to_name; ++argv) 332 install(*argv, to_name, iflags | DIRECTORY); 333 exit(0); 334 } 335 336 /* can't do file1 file2 directory/file */ 337 if (argc != 2) 338 usage(); 339 340 if (!no_target) { 341 /* makelink() handles checks for links */ 342 if (!dolink) { 343 if (stat(*argv, &from_sb)) 344 err(1, "%s: stat", *argv); 345 if (!S_ISREG(to_sb.st_mode)) 346 errx(1, "%s: not a regular file", to_name); 347 if (to_sb.st_dev == from_sb.st_dev && 348 to_sb.st_ino == from_sb.st_ino) 349 errx(1, "%s and %s are the same file", *argv, 350 to_name); 351 } 352 /* 353 * Unlink now... avoid ETXTBSY errors later. Try and turn 354 * off the append/immutable bits -- if we fail, go ahead, 355 * it might work. 356 */ 357 #if ! HAVE_NBTOOL_CONFIG_H 358 #define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND) 359 if (to_sb.st_flags & NOCHANGEBITS) 360 (void)chflags(to_name, 361 to_sb.st_flags & ~(NOCHANGEBITS)); 362 #endif 363 if (dobackup) 364 backup(to_name); 365 else if (!dorename) 366 (void)unlink(to_name); 367 } 368 install(*argv, to_name, iflags); 369 exit(0); 370 } 371 372 /* 373 * parseid -- 374 * parse uid or gid from arg into id, returning non-zero if successful 375 */ 376 int 377 parseid(char *name, id_t *id) 378 { 379 char *ep; 380 381 errno = 0; 382 *id = (id_t)strtoul(name, &ep, 10); 383 if (errno || *ep != '\0') 384 return (0); 385 return (1); 386 } 387 388 /* 389 * do_link -- 390 * make a hard link, obeying dorename if set 391 * return -1 on failure 392 */ 393 int 394 do_link(char *from_name, char *to_name) 395 { 396 char tmpl[MAXPATHLEN]; 397 int ret; 398 399 if (dorename) { 400 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 401 xdirname(to_name)); 402 /* This usage is safe. */ 403 if (mktemp(tmpl) == NULL) 404 err(1, "%s: mktemp", tmpl); 405 ret = link(from_name, tmpl); 406 if (ret == 0) { 407 ret = rename(tmpl, to_name); 408 /* If rename has posix semantics, then the temporary 409 * file may still exist when from_name and to_name point 410 * to the smae file, so unlink it unconditionally. 411 */ 412 (void)unlink(tmpl); 413 } 414 return (ret); 415 } else 416 return (link(from_name, to_name)); 417 } 418 419 /* 420 * do_symlink -- 421 * make a symbolic link, obeying dorename if set 422 * exit on failure 423 */ 424 void 425 do_symlink(char *from_name, char *to_name) 426 { 427 char tmpl[MAXPATHLEN]; 428 429 if (dorename) { 430 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 431 xdirname(to_name)); 432 /* This usage is safe. */ 433 if (mktemp(tmpl) == NULL) 434 err(1, "%s: mktemp", tmpl); 435 436 if (symlink(from_name, tmpl) == -1) 437 err(1, "symlink %s -> %s", from_name, tmpl); 438 if (rename(tmpl, to_name) == -1) { 439 /* remove temporary link before exiting */ 440 (void)unlink(tmpl); 441 err(1, "%s: rename", to_name); 442 } 443 } else { 444 if (symlink(from_name, to_name) == -1) 445 err(1, "symlink %s -> %s", from_name, to_name); 446 } 447 } 448 449 /* 450 * makelink -- 451 * make a link from source to destination 452 */ 453 void 454 makelink(char *from_name, char *to_name) 455 { 456 char src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN]; 457 struct stat to_sb; 458 459 /* Try hard links first */ 460 if (dolink & (LN_HARD|LN_MIXED)) { 461 if (do_link(from_name, to_name) == -1) { 462 if ((dolink & LN_HARD) || errno != EXDEV) 463 err(1, "link %s -> %s", from_name, to_name); 464 } else { 465 if (stat(to_name, &to_sb)) 466 err(1, "%s: stat", to_name); 467 if (S_ISREG(to_sb.st_mode)) { 468 /* XXX: only metalog hardlinked files */ 469 int omode; 470 char *oowner, *ogroup, *offlags; 471 char *dres; 472 473 /* XXX: use underlying perms */ 474 omode = mode; 475 mode = (to_sb.st_mode & 0777); 476 oowner = owner; 477 owner = NULL; 478 ogroup = group; 479 group = NULL; 480 offlags = fflags; 481 fflags = NULL; 482 switch (digesttype) { 483 case DIGEST_MD5: 484 dres = MD5File(from_name, NULL); 485 break; 486 case DIGEST_RMD160: 487 dres = RMD160File(from_name, NULL); 488 break; 489 case DIGEST_SHA1: 490 dres = SHA1File(from_name, NULL); 491 break; 492 default: 493 dres = NULL; 494 } 495 metadata_log(to_name, "file", NULL, NULL, dres); 496 free(dres); 497 mode = omode; 498 owner = oowner; 499 group = ogroup; 500 fflags = offlags; 501 } 502 return; 503 } 504 } 505 506 /* Symbolic links */ 507 if (dolink & LN_ABSOLUTE) { 508 /* Convert source path to absolute */ 509 if (realpath(from_name, src) == NULL) 510 err(1, "%s: realpath", from_name); 511 do_symlink(src, to_name); 512 /* XXX: src may point outside of destdir */ 513 metadata_log(to_name, "link", NULL, src, NULL); 514 return; 515 } 516 517 if (dolink & LN_RELATIVE) { 518 char *cp, *d, *s; 519 520 /* Resolve pathnames */ 521 if (realpath(from_name, src) == NULL) 522 err(1, "%s: realpath", from_name); 523 524 /* 525 * The last component of to_name may be a symlink, 526 * so use realpath to resolve only the directory. 527 */ 528 cp = xdirname(to_name); 529 if (realpath(cp, dst) == NULL) 530 err(1, "%s: realpath", cp); 531 /* .. and add the last component */ 532 if (strcmp(dst, "/") != 0) { 533 if (strlcat(dst, "/", sizeof(dst)) > sizeof(dst)) 534 errx(1, "resolved pathname too long"); 535 } 536 cp = xbasename(to_name); 537 if (strlcat(dst, cp, sizeof(dst)) > sizeof(dst)) 538 errx(1, "resolved pathname too long"); 539 540 /* trim common path components */ 541 for (s = src, d = dst; *s == *d; s++, d++) 542 continue; 543 while (*s != '/') 544 s--, d--; 545 546 /* count the number of directories we need to backtrack */ 547 for (++d, lnk[0] = '\0'; *d; d++) 548 if (*d == '/') 549 (void)strlcat(lnk, "../", sizeof(lnk)); 550 551 (void)strlcat(lnk, ++s, sizeof(lnk)); 552 553 do_symlink(lnk, to_name); 554 /* XXX: lnk may point outside of destdir */ 555 metadata_log(to_name, "link", NULL, lnk, NULL); 556 return; 557 } 558 559 /* 560 * If absolute or relative was not specified, 561 * try the names the user provided 562 */ 563 do_symlink(from_name, to_name); 564 /* XXX: from_name may point outside of destdir */ 565 metadata_log(to_name, "link", NULL, from_name, NULL); 566 } 567 568 /* 569 * install -- 570 * build a path name and install the file 571 */ 572 void 573 install(char *from_name, char *to_name, u_int flags) 574 { 575 struct stat from_sb; 576 #if ! HAVE_NBTOOL_CONFIG_H 577 struct stat to_sb; 578 #endif 579 struct timeval tv[2]; 580 int devnull, from_fd, to_fd, serrno, tmpmode; 581 char *p, tmpl[MAXPATHLEN], *oto_name, *digestresult; 582 583 if (!dolink) { 584 /* ensure that from_sb & tv are sane if !dolink */ 585 if (stat(from_name, &from_sb)) 586 err(1, "%s: stat", from_name); 587 #if BSD4_4 && !HAVE_NBTOOL_CONFIG_H 588 TIMESPEC_TO_TIMEVAL(&tv[0], &from_sb.st_atimespec); 589 TIMESPEC_TO_TIMEVAL(&tv[1], &from_sb.st_mtimespec); 590 #else 591 tv[0].tv_sec = from_sb.st_atime; 592 tv[0].tv_usec = 0; 593 tv[1].tv_sec = from_sb.st_mtime; 594 tv[1].tv_usec = 0; 595 #endif 596 } 597 598 if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) { 599 if (!dolink) { 600 if (!S_ISREG(from_sb.st_mode)) 601 errx(1, "%s: not a regular file", from_name); 602 } 603 /* Build the target path. */ 604 if (flags & DIRECTORY) { 605 (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s", 606 to_name, 607 (p = strrchr(from_name, '/')) ? ++p : from_name); 608 to_name = pathbuf; 609 } 610 devnull = 0; 611 } else { 612 #if HAVE_STRUCT_STAT_ST_FLAGS 613 from_sb.st_flags = 0; /* XXX */ 614 #endif 615 devnull = 1; 616 } 617 618 /* 619 * Unlink now... avoid ETXTBSY errors later. Try and turn 620 * off the append/immutable bits -- if we fail, go ahead, 621 * it might work. 622 */ 623 #if ! HAVE_NBTOOL_CONFIG_H 624 if (stat(to_name, &to_sb) == 0 && 625 to_sb.st_flags & (NOCHANGEBITS)) 626 (void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS)); 627 #endif 628 if (dorename) { 629 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 630 xdirname(to_name)); 631 oto_name = to_name; 632 to_name = tmpl; 633 } else { 634 oto_name = NULL; /* pacify gcc */ 635 if (dobackup) 636 backup(to_name); 637 else 638 (void)unlink(to_name); 639 } 640 641 if (dolink) { 642 makelink(from_name, dorename ? oto_name : to_name); 643 return; 644 } 645 646 /* Create target. */ 647 if (dorename) { 648 if ((to_fd = mkstemp(to_name)) == -1) 649 err(1, "%s: mkstemp", to_name); 650 } else { 651 if ((to_fd = open(to_name, 652 O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0) 653 err(1, "%s: open", to_name); 654 } 655 digestresult = NULL; 656 if (!devnull) { 657 if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) { 658 (void)unlink(to_name); 659 err(1, "%s: open", from_name); 660 } 661 digestresult = 662 copy(from_fd, from_name, to_fd, to_name, from_sb.st_size); 663 (void)close(from_fd); 664 } 665 666 if (dostrip) { 667 strip(to_name); 668 669 /* 670 * Re-open our fd on the target, in case we used a strip 671 * that does not work in-place -- like gnu binutils strip. 672 */ 673 close(to_fd); 674 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 675 err(1, "stripping %s", to_name); 676 } 677 678 if (afterinstallcmd != NULL) { 679 afterinstall(afterinstallcmd, to_name, 1); 680 681 /* 682 * Re-open our fd on the target, in case we used an 683 * after-install command that does not work in-place 684 */ 685 close(to_fd); 686 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 687 err(1, "running after install command on %s", to_name); 688 } 689 690 /* 691 * Set owner, group, mode for target; do the chown first, 692 * chown may lose the setuid bits. 693 */ 694 if (!dounpriv && 695 (flags & (HASUID | HASGID)) && fchown(to_fd, uid, gid) == -1) { 696 serrno = errno; 697 (void)unlink(to_name); 698 errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno)); 699 } 700 tmpmode = mode; 701 if (dounpriv) 702 tmpmode &= S_IRWXU|S_IRWXG|S_IRWXO; 703 if (fchmod(to_fd, tmpmode) == -1) { 704 serrno = errno; 705 (void)unlink(to_name); 706 errx(1, "%s: chmod: %s", to_name, strerror(serrno)); 707 } 708 709 /* 710 * Preserve the date of the source file. 711 */ 712 if (dopreserve) { 713 #if HAVE_FUTIMES 714 if (futimes(to_fd, tv) == -1) 715 warn("%s: futimes", to_name); 716 #else 717 if (utimes(to_name, tv) == -1) 718 warn("%s: utimes", to_name); 719 #endif 720 } 721 722 (void)close(to_fd); 723 724 if (dorename) { 725 if (rename(to_name, oto_name) == -1) 726 err(1, "%s: rename", to_name); 727 to_name = oto_name; 728 } 729 730 /* 731 * If provided a set of flags, set them, otherwise, preserve the 732 * flags, except for the dump flag. 733 */ 734 #if ! HAVE_NBTOOL_CONFIG_H 735 if (!dounpriv && chflags(to_name, 736 flags & SETFLAGS ? fileflags : from_sb.st_flags & ~UF_NODUMP) == -1) 737 { 738 if (errno != EOPNOTSUPP || (from_sb.st_flags & ~UF_NODUMP) != 0) 739 warn("%s: chflags", to_name); 740 } 741 #endif 742 743 metadata_log(to_name, "file", tv, NULL, digestresult); 744 free(digestresult); 745 } 746 747 /* 748 * copy -- 749 * copy from one file to another 750 */ 751 char * 752 copy(int from_fd, char *from_name, int to_fd, char *to_name, off_t size) 753 { 754 ssize_t nr, nw; 755 int serrno; 756 u_char *p; 757 u_char buf[MAXBSIZE]; 758 MD5_CTX ctxMD5; 759 RMD160_CTX ctxRMD160; 760 SHA1_CTX ctxSHA1; 761 762 switch (digesttype) { 763 case DIGEST_MD5: 764 MD5Init(&ctxMD5); 765 break; 766 case DIGEST_RMD160: 767 RMD160Init(&ctxRMD160); 768 break; 769 case DIGEST_SHA1: 770 SHA1Init(&ctxSHA1); 771 break; 772 case DIGEST_NONE: 773 default: 774 break; 775 } 776 /* 777 * There's no reason to do anything other than close the file 778 * now if it's empty, so let's not bother. 779 */ 780 if (size > 0) { 781 782 /* 783 * Mmap and write if less than 8M (the limit is so we 784 * don't totally trash memory on big files). This is 785 * really a minor hack, but it wins some CPU back. 786 */ 787 788 if (size <= 8 * 1048576) { 789 if ((p = mmap(NULL, (size_t)size, PROT_READ, 790 MAP_FILE|MAP_SHARED, from_fd, (off_t)0)) 791 == MAP_FAILED) { 792 goto mmap_failed; 793 } 794 #if defined(MADV_SEQUENTIAL) && !defined(__APPLE__) 795 if (madvise(p, (size_t)size, MADV_SEQUENTIAL) == -1 796 && errno != EOPNOTSUPP) 797 warnx("madvise: %s", strerror(errno)); 798 #endif 799 800 if (write(to_fd, p, size) != size) { 801 serrno = errno; 802 (void)unlink(to_name); 803 errx(1, "%s: write: %s", 804 to_name, strerror(serrno)); 805 } 806 switch (digesttype) { 807 case DIGEST_MD5: 808 MD5Update(&ctxMD5, p, size); 809 break; 810 case DIGEST_RMD160: 811 RMD160Update(&ctxRMD160, p, size); 812 break; 813 case DIGEST_SHA1: 814 SHA1Update(&ctxSHA1, p, size); 815 break; 816 default: 817 break; 818 } 819 (void)munmap(p, size); 820 } else { 821 mmap_failed: 822 while ((nr = read(from_fd, buf, sizeof(buf))) > 0) { 823 if ((nw = write(to_fd, buf, nr)) != nr) { 824 serrno = errno; 825 (void)unlink(to_name); 826 errx(1, "%s: write: %s", to_name, 827 strerror(nw > 0 ? EIO : serrno)); 828 } 829 switch (digesttype) { 830 case DIGEST_MD5: 831 MD5Update(&ctxMD5, buf, nr); 832 break; 833 case DIGEST_RMD160: 834 RMD160Update(&ctxRMD160, buf, nr); 835 break; 836 case DIGEST_SHA1: 837 SHA1Update(&ctxSHA1, buf, nr); 838 break; 839 default: 840 break; 841 } 842 } 843 if (nr != 0) { 844 serrno = errno; 845 (void)unlink(to_name); 846 errx(1, "%s: read: %s", from_name, strerror(serrno)); 847 } 848 } 849 } 850 switch (digesttype) { 851 case DIGEST_MD5: 852 return MD5End(&ctxMD5, NULL); 853 case DIGEST_RMD160: 854 return RMD160End(&ctxRMD160, NULL); 855 case DIGEST_SHA1: 856 return SHA1End(&ctxSHA1, NULL); 857 default: 858 return NULL; 859 } 860 } 861 862 /* 863 * strip -- 864 * use strip(1) to strip the target file 865 */ 866 void 867 strip(char *to_name) 868 { 869 int serrno, status; 870 char *stripprog; 871 872 switch (vfork()) { 873 case -1: 874 serrno = errno; 875 (void)unlink(to_name); 876 errx(1, "vfork: %s", strerror(serrno)); 877 /*NOTREACHED*/ 878 case 0: 879 stripprog = getenv("STRIP"); 880 if (stripprog == NULL) 881 stripprog = _PATH_STRIP; 882 883 if (stripArgs) { 884 /* 885 * build up a command line and let /bin/sh 886 * parse the arguments 887 */ 888 char* cmd = (char*)malloc(sizeof(char)* 889 (3+strlen(stripprog)+ 890 strlen(stripArgs)+ 891 strlen(to_name))); 892 893 if (cmd == NULL) 894 errx(1, "%s", strerror(ENOMEM)); 895 896 sprintf(cmd, "%s %s %s", stripprog, stripArgs, to_name); 897 898 execl(_PATH_BSHELL, "sh", "-c", cmd, NULL); 899 } else 900 execlp(stripprog, "strip", to_name, NULL); 901 902 warn("%s: exec of strip", stripprog); 903 _exit(1); 904 /*NOTREACHED*/ 905 default: 906 if (wait(&status) == -1 || status) 907 (void)unlink(to_name); 908 } 909 } 910 911 /* 912 * afterinstall -- 913 * run provided command on the target file or directory after it's been 914 * installed and stripped, but before permissions are set or it's renamed 915 */ 916 void 917 afterinstall(const char *command, const char *to_name, int errunlink) 918 { 919 int serrno, status; 920 char *cmd; 921 922 switch (vfork()) { 923 case -1: 924 serrno = errno; 925 if (errunlink) 926 (void)unlink(to_name); 927 errx(1, "vfork: %s", strerror(serrno)); 928 /*NOTREACHED*/ 929 case 0: 930 /* 931 * build up a command line and let /bin/sh 932 * parse the arguments 933 */ 934 cmd = (char*)malloc(sizeof(char)* 935 (2+strlen(command)+ 936 strlen(to_name))); 937 938 if (cmd == NULL) 939 errx(1, "%s", strerror(ENOMEM)); 940 941 sprintf(cmd, "%s %s", command, to_name); 942 943 execl(_PATH_BSHELL, "sh", "-c", cmd, NULL); 944 945 warn("%s: exec of after install command", command); 946 _exit(1); 947 /*NOTREACHED*/ 948 default: 949 if ((wait(&status) == -1 || status) && errunlink) 950 (void)unlink(to_name); 951 } 952 } 953 954 /* 955 * backup -- 956 * backup file "to_name" to to_name.suffix 957 * if suffix contains a "%", it's taken as a printf(3) pattern 958 * used for a numbered backup. 959 */ 960 void 961 backup(const char *to_name) 962 { 963 char bname[FILENAME_MAX]; 964 965 if (numberedbackup) { 966 /* Do numbered backup */ 967 int cnt; 968 char suffix_expanded[FILENAME_MAX]; 969 970 cnt=0; 971 do { 972 (void)snprintf(suffix_expanded, FILENAME_MAX, suffix, 973 cnt); 974 (void)snprintf(bname, FILENAME_MAX, "%s%s", to_name, 975 suffix_expanded); 976 cnt++; 977 } while (access(bname, F_OK) == 0); 978 } else { 979 /* Do simple backup */ 980 (void)snprintf(bname, FILENAME_MAX, "%s%s", to_name, suffix); 981 } 982 983 (void)rename(to_name, bname); 984 } 985 986 /* 987 * install_dir -- 988 * build directory hierarchy 989 */ 990 void 991 install_dir(char *path, u_int flags) 992 { 993 char *p; 994 struct stat sb; 995 int ch; 996 997 for (p = path;; ++p) 998 if (!*p || (p != path && *p == '/')) { 999 ch = *p; 1000 *p = '\0'; 1001 if (stat(path, &sb)) { 1002 if (errno != ENOENT || mkdir(path, 0777) < 0) { 1003 err(1, "%s: mkdir", path); 1004 } 1005 } 1006 if (!(*p = ch)) 1007 break; 1008 } 1009 1010 if (afterinstallcmd != NULL) 1011 afterinstall(afterinstallcmd, path, 0); 1012 1013 if (!dounpriv && ( 1014 ((flags & (HASUID | HASGID)) && chown(path, uid, gid) == -1) 1015 || chmod(path, mode) == -1 )) { 1016 warn("%s: chown/chmod", path); 1017 } 1018 metadata_log(path, "dir", NULL, NULL, NULL); 1019 } 1020 1021 /* 1022 * metadata_log -- 1023 * if metafp is not NULL, output mtree(8) full path name and settings to 1024 * metafp, to allow permissions to be set correctly by other tools. 1025 */ 1026 void 1027 metadata_log(const char *path, const char *type, struct timeval *tv, 1028 const char *link, const char *digestresult) 1029 { 1030 static const char extra[] = { ' ', '\t', '\n', '\\', '#', '\0' }; 1031 const char *p; 1032 char *buf; 1033 size_t destlen; 1034 struct flock metalog_lock; 1035 1036 if (!metafp) 1037 return; 1038 buf = (char *)malloc(4 * strlen(path) + 1); /* buf for strsvis(3) */ 1039 if (buf == NULL) { 1040 warnx("%s", strerror(ENOMEM)); 1041 return; 1042 } 1043 /* lock log file */ 1044 metalog_lock.l_start = 0; 1045 metalog_lock.l_len = 0; 1046 metalog_lock.l_whence = SEEK_SET; 1047 metalog_lock.l_type = F_WRLCK; 1048 if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) { 1049 warn("can't lock %s", metafile); 1050 free(buf); 1051 return; 1052 } 1053 1054 p = path; /* remove destdir */ 1055 if (destdir) { 1056 destlen = strlen(destdir); 1057 if (strncmp(p, destdir, destlen) == 0 && 1058 (p[destlen] == '/' || p[destlen] == '\0')) 1059 p += destlen; 1060 } 1061 while (*p && *p == '/') /* remove leading /s */ 1062 p++; 1063 strsvis(buf, p, VIS_CSTYLE, extra); /* encode name */ 1064 p = buf; 1065 /* print details */ 1066 fprintf(metafp, ".%s%s type=%s mode=%#o", *p ? "/" : "", p, type, mode); 1067 if (link) { 1068 strsvis(buf, link, VIS_CSTYLE, extra); /* encode link */ 1069 fprintf(metafp, " link=%s", buf); 1070 } 1071 if (owner) 1072 fprintf(metafp, " uname=%s", owner); 1073 if (group) 1074 fprintf(metafp, " gname=%s", group); 1075 if (fflags) 1076 fprintf(metafp, " flags=%s", fflags); 1077 if (tags) 1078 fprintf(metafp, " tags=%s", tags); 1079 if (tv != NULL && dopreserve) 1080 fprintf(metafp, " time=%ld.%ld", tv[1].tv_sec, tv[1].tv_usec); 1081 if (digestresult && digest) 1082 fprintf(metafp, " %s=%s", digest, digestresult); 1083 fputc('\n', metafp); 1084 fflush(metafp); /* flush output */ 1085 /* unlock log file */ 1086 metalog_lock.l_type = F_UNLCK; 1087 if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) { 1088 warn("can't unlock %s", metafile); 1089 } 1090 free(buf); 1091 } 1092 1093 /* 1094 * xbasename -- 1095 * libc basename(3) that returns a pointer to a static buffer 1096 * instead of overwriting that passed-in string. 1097 */ 1098 char * 1099 xbasename(char *path) 1100 { 1101 static char tmp[MAXPATHLEN]; 1102 1103 (void)strlcpy(tmp, path, sizeof(tmp)); 1104 return (basename(tmp)); 1105 } 1106 1107 /* 1108 * xdirname -- 1109 * libc dirname(3) that returns a pointer to a static buffer 1110 * instead of overwriting that passed-in string. 1111 */ 1112 char * 1113 xdirname(char *path) 1114 { 1115 static char tmp[MAXPATHLEN]; 1116 1117 (void)strlcpy(tmp, path, sizeof(tmp)); 1118 return (dirname(tmp)); 1119 } 1120 1121 /* 1122 * usage -- 1123 * print a usage message and die 1124 */ 1125 void 1126 usage(void) 1127 { 1128 const char *prog; 1129 1130 prog = getprogname(); 1131 1132 (void)fprintf(stderr, 1133 "usage: %s [-Ubcprs] [-M log] [-D dest] [-T tags] [-B suffix]\n" 1134 " [-a aftercmd] [-f flags] [-m mode] [-N dbdir] [-o owner] [-g group] \n" 1135 " [-l linkflags] [-h hash] [-S stripflags] file1 file2\n" 1136 " %s [-Ubcprs] [-M log] [-D dest] [-T tags] [-B suffix]\n" 1137 " [-a aftercmd] [-f flags] [-m mode] [-N dbdir] [-o owner] [-g group]\n" 1138 " [-l linkflags] [-h hash] [-S stripflags] file1 ... fileN directory\n" 1139 " %s -d [-Up] [-M log] [-D dest] [-T tags] [-a aftercmd] [-m mode]\n" 1140 " [-N dbdir] [-o owner] [-g group] directory ...\n", 1141 prog, prog, prog); 1142 exit(1); 1143 } 1144
Indexes created Mon Sep 29 03:10:08 GMT 2025