xinstall.c revision 1.98
1 /* $NetBSD: xinstall.c,v 1.98 2006/09/25 16:05:44 daniel 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 1.98 2006/09/25 16:05:44 daniel 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 /* 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 usage(); 341 342 if (!no_target) { 343 /* makelink() handles checks for links */ 344 if (!dolink) { 345 if (stat(*argv, &from_sb)) 346 err(1, "%s: stat", *argv); 347 if (!S_ISREG(to_sb.st_mode)) 348 errx(1, "%s: not a regular file", to_name); 349 if (to_sb.st_dev == from_sb.st_dev && 350 to_sb.st_ino == from_sb.st_ino) 351 errx(1, "%s and %s are the same file", *argv, 352 to_name); 353 } 354 /* 355 * Unlink now... avoid ETXTBSY errors later. Try and turn 356 * off the append/immutable bits -- if we fail, go ahead, 357 * it might work. 358 */ 359 #if ! HAVE_NBTOOL_CONFIG_H 360 #define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND) 361 if (to_sb.st_flags & NOCHANGEBITS) 362 (void)chflags(to_name, 363 to_sb.st_flags & ~(NOCHANGEBITS)); 364 #endif 365 if (dobackup) 366 backup(to_name); 367 else if (!dorename) 368 (void)unlink(to_name); 369 } 370 install(*argv, to_name, iflags); 371 exit(0); 372 } 373 374 /* 375 * parseid -- 376 * parse uid or gid from arg into id, returning non-zero if successful 377 */ 378 int 379 parseid(char *name, id_t *id) 380 { 381 char *ep; 382 383 errno = 0; 384 *id = (id_t)strtoul(name, &ep, 10); 385 if (errno || *ep != '\0') 386 return (0); 387 return (1); 388 } 389 390 /* 391 * do_link -- 392 * make a hard link, obeying dorename if set 393 * return -1 on failure 394 */ 395 int 396 do_link(char *from_name, char *to_name) 397 { 398 char tmpl[MAXPATHLEN]; 399 int ret; 400 401 if (dorename) { 402 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 403 xdirname(to_name)); 404 /* This usage is safe. */ 405 if (mktemp(tmpl) == NULL) 406 err(1, "%s: mktemp", tmpl); 407 ret = link(from_name, tmpl); 408 if (ret == 0) { 409 ret = rename(tmpl, to_name); 410 /* If rename has posix semantics, then the temporary 411 * file may still exist when from_name and to_name point 412 * to the smae file, so unlink it unconditionally. 413 */ 414 (void)unlink(tmpl); 415 } 416 return (ret); 417 } else 418 return (link(from_name, to_name)); 419 } 420 421 /* 422 * do_symlink -- 423 * make a symbolic link, obeying dorename if set 424 * exit on failure 425 */ 426 void 427 do_symlink(char *from_name, char *to_name) 428 { 429 char tmpl[MAXPATHLEN]; 430 431 if (dorename) { 432 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 433 xdirname(to_name)); 434 /* This usage is safe. */ 435 if (mktemp(tmpl) == NULL) 436 err(1, "%s: mktemp", tmpl); 437 438 if (symlink(from_name, tmpl) == -1) 439 err(1, "symlink %s -> %s", from_name, tmpl); 440 if (rename(tmpl, to_name) == -1) { 441 /* remove temporary link before exiting */ 442 (void)unlink(tmpl); 443 err(1, "%s: rename", to_name); 444 } 445 } else { 446 if (symlink(from_name, to_name) == -1) 447 err(1, "symlink %s -> %s", from_name, to_name); 448 } 449 } 450 451 /* 452 * makelink -- 453 * make a link from source to destination 454 */ 455 void 456 makelink(char *from_name, char *to_name) 457 { 458 char src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN]; 459 struct stat to_sb; 460 461 /* Try hard links first */ 462 if (dolink & (LN_HARD|LN_MIXED)) { 463 if (do_link(from_name, to_name) == -1) { 464 if ((dolink & LN_HARD) || errno != EXDEV) 465 err(1, "link %s -> %s", from_name, to_name); 466 } else { 467 if (stat(to_name, &to_sb)) 468 err(1, "%s: stat", to_name); 469 if (S_ISREG(to_sb.st_mode)) { 470 /* XXX: only metalog hardlinked files */ 471 int omode; 472 char *oowner, *ogroup, *offlags; 473 char *dres; 474 475 /* XXX: use underlying perms */ 476 omode = mode; 477 mode = (to_sb.st_mode & 0777); 478 oowner = owner; 479 owner = NULL; 480 ogroup = group; 481 group = NULL; 482 offlags = fflags; 483 fflags = NULL; 484 switch (digesttype) { 485 case DIGEST_MD5: 486 dres = MD5File(from_name, NULL); 487 break; 488 case DIGEST_RMD160: 489 dres = RMD160File(from_name, NULL); 490 break; 491 case DIGEST_SHA1: 492 dres = SHA1File(from_name, NULL); 493 break; 494 default: 495 dres = NULL; 496 } 497 metadata_log(to_name, "file", NULL, NULL, dres); 498 free(dres); 499 mode = omode; 500 owner = oowner; 501 group = ogroup; 502 fflags = offlags; 503 } 504 return; 505 } 506 } 507 508 /* Symbolic links */ 509 if (dolink & LN_ABSOLUTE) { 510 /* Convert source path to absolute */ 511 if (realpath(from_name, src) == NULL) 512 err(1, "%s: realpath", from_name); 513 do_symlink(src, to_name); 514 /* XXX: src may point outside of destdir */ 515 metadata_log(to_name, "link", NULL, src, NULL); 516 return; 517 } 518 519 if (dolink & LN_RELATIVE) { 520 char *cp, *d, *s; 521 522 /* Resolve pathnames */ 523 if (realpath(from_name, src) == NULL) 524 err(1, "%s: realpath", from_name); 525 526 /* 527 * The last component of to_name may be a symlink, 528 * so use realpath to resolve only the directory. 529 */ 530 cp = xdirname(to_name); 531 if (realpath(cp, dst) == NULL) 532 err(1, "%s: realpath", cp); 533 /* .. and add the last component */ 534 if (strcmp(dst, "/") != 0) { 535 if (strlcat(dst, "/", sizeof(dst)) > sizeof(dst)) 536 errx(1, "resolved pathname too long"); 537 } 538 cp = xbasename(to_name); 539 if (strlcat(dst, cp, sizeof(dst)) > sizeof(dst)) 540 errx(1, "resolved pathname too long"); 541 542 /* trim common path components */ 543 for (s = src, d = dst; *s == *d; s++, d++) 544 continue; 545 while (*s != '/') 546 s--, d--; 547 548 /* count the number of directories we need to backtrack */ 549 for (++d, lnk[0] = '\0'; *d; d++) 550 if (*d == '/') 551 (void)strlcat(lnk, "../", sizeof(lnk)); 552 553 (void)strlcat(lnk, ++s, sizeof(lnk)); 554 555 do_symlink(lnk, to_name); 556 /* XXX: lnk may point outside of destdir */ 557 metadata_log(to_name, "link", NULL, lnk, NULL); 558 return; 559 } 560 561 /* 562 * If absolute or relative was not specified, 563 * try the names the user provided 564 */ 565 do_symlink(from_name, to_name); 566 /* XXX: from_name may point outside of destdir */ 567 metadata_log(to_name, "link", NULL, from_name, NULL); 568 } 569 570 /* 571 * install -- 572 * build a path name and install the file 573 */ 574 void 575 install(char *from_name, char *to_name, u_int flags) 576 { 577 struct stat from_sb; 578 #if ! HAVE_NBTOOL_CONFIG_H 579 struct stat to_sb; 580 #endif 581 struct timeval tv[2]; 582 int devnull, from_fd, to_fd, serrno, tmpmode; 583 char *p, tmpl[MAXPATHLEN], *oto_name, *digestresult; 584 585 if (!dolink) { 586 /* ensure that from_sb & tv are sane if !dolink */ 587 if (stat(from_name, &from_sb)) 588 err(1, "%s: stat", from_name); 589 #if BSD4_4 && !HAVE_NBTOOL_CONFIG_H 590 TIMESPEC_TO_TIMEVAL(&tv[0], &from_sb.st_atimespec); 591 TIMESPEC_TO_TIMEVAL(&tv[1], &from_sb.st_mtimespec); 592 #else 593 tv[0].tv_sec = from_sb.st_atime; 594 tv[0].tv_usec = 0; 595 tv[1].tv_sec = from_sb.st_mtime; 596 tv[1].tv_usec = 0; 597 #endif 598 } 599 600 if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) { 601 if (!dolink) { 602 if (!S_ISREG(from_sb.st_mode)) 603 errx(1, "%s: not a regular file", from_name); 604 } 605 /* Build the target path. */ 606 if (flags & DIRECTORY) { 607 (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s", 608 to_name, 609 (p = strrchr(from_name, '/')) ? ++p : from_name); 610 to_name = pathbuf; 611 } 612 devnull = 0; 613 } else { 614 #if HAVE_STRUCT_STAT_ST_FLAGS 615 from_sb.st_flags = 0; /* XXX */ 616 #endif 617 devnull = 1; 618 } 619 620 /* 621 * Unlink now... avoid ETXTBSY errors later. Try and turn 622 * off the append/immutable bits -- if we fail, go ahead, 623 * it might work. 624 */ 625 #if ! HAVE_NBTOOL_CONFIG_H 626 if (stat(to_name, &to_sb) == 0 && 627 to_sb.st_flags & (NOCHANGEBITS)) 628 (void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS)); 629 #endif 630 if (dorename) { 631 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 632 xdirname(to_name)); 633 oto_name = to_name; 634 to_name = tmpl; 635 } else { 636 oto_name = NULL; /* pacify gcc */ 637 if (dobackup) 638 backup(to_name); 639 else 640 (void)unlink(to_name); 641 } 642 643 if (dolink) { 644 makelink(from_name, dorename ? oto_name : to_name); 645 return; 646 } 647 648 /* Create target. */ 649 if (dorename) { 650 if ((to_fd = mkstemp(to_name)) == -1) 651 err(1, "%s: mkstemp", to_name); 652 } else { 653 if ((to_fd = open(to_name, 654 O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0) 655 err(1, "%s: open", to_name); 656 } 657 digestresult = NULL; 658 if (!devnull) { 659 if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) { 660 (void)unlink(to_name); 661 err(1, "%s: open", from_name); 662 } 663 digestresult = 664 copy(from_fd, from_name, to_fd, to_name, from_sb.st_size); 665 (void)close(from_fd); 666 } 667 668 if (dostrip) { 669 strip(to_name); 670 671 /* 672 * Re-open our fd on the target, in case we used a strip 673 * that does not work in-place -- like gnu binutils strip. 674 */ 675 close(to_fd); 676 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 677 err(1, "stripping %s", to_name); 678 } 679 680 if (afterinstallcmd != NULL) { 681 afterinstall(afterinstallcmd, to_name, 1); 682 683 /* 684 * Re-open our fd on the target, in case we used an 685 * after-install command that does not work in-place 686 */ 687 close(to_fd); 688 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 689 err(1, "running after install command on %s", to_name); 690 } 691 692 /* 693 * Set owner, group, mode for target; do the chown first, 694 * chown may lose the setuid bits. 695 */ 696 if (!dounpriv && 697 (flags & (HASUID | HASGID)) && fchown(to_fd, uid, gid) == -1) { 698 serrno = errno; 699 (void)unlink(to_name); 700 errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno)); 701 } 702 tmpmode = mode; 703 if (dounpriv) 704 tmpmode &= S_IRWXU|S_IRWXG|S_IRWXO; 705 if (fchmod(to_fd, tmpmode) == -1) { 706 serrno = errno; 707 (void)unlink(to_name); 708 errx(1, "%s: chmod: %s", to_name, strerror(serrno)); 709 } 710 711 /* 712 * Preserve the date of the source file. 713 */ 714 if (dopreserve) { 715 #if HAVE_FUTIMES 716 if (futimes(to_fd, tv) == -1) 717 warn("%s: futimes", to_name); 718 #else 719 if (utimes(to_name, tv) == -1) 720 warn("%s: utimes", to_name); 721 #endif 722 } 723 724 (void)close(to_fd); 725 726 if (dorename) { 727 if (rename(to_name, oto_name) == -1) 728 err(1, "%s: rename", to_name); 729 to_name = oto_name; 730 } 731 732 /* 733 * If provided a set of flags, set them, otherwise, preserve the 734 * flags, except for the dump flag. 735 */ 736 #if ! HAVE_NBTOOL_CONFIG_H 737 if (!dounpriv && chflags(to_name, 738 flags & SETFLAGS ? fileflags : from_sb.st_flags & ~UF_NODUMP) == -1) 739 { 740 if (errno != EOPNOTSUPP || (from_sb.st_flags & ~UF_NODUMP) != 0) 741 warn("%s: chflags", to_name); 742 } 743 #endif 744 745 metadata_log(to_name, "file", tv, NULL, digestresult); 746 free(digestresult); 747 } 748 749 /* 750 * copy -- 751 * copy from one file to another 752 */ 753 char * 754 copy(int from_fd, char *from_name, int to_fd, char *to_name, off_t size) 755 { 756 ssize_t nr, nw; 757 int serrno; 758 u_char *p; 759 u_char buf[MAXBSIZE]; 760 MD5_CTX ctxMD5; 761 RMD160_CTX ctxRMD160; 762 SHA1_CTX ctxSHA1; 763 764 switch (digesttype) { 765 case DIGEST_MD5: 766 MD5Init(&ctxMD5); 767 break; 768 case DIGEST_RMD160: 769 RMD160Init(&ctxRMD160); 770 break; 771 case DIGEST_SHA1: 772 SHA1Init(&ctxSHA1); 773 break; 774 case DIGEST_NONE: 775 default: 776 break; 777 } 778 /* 779 * There's no reason to do anything other than close the file 780 * now if it's empty, so let's not bother. 781 */ 782 if (size > 0) { 783 784 /* 785 * Mmap and write if less than 8M (the limit is so we 786 * don't totally trash memory on big files). This is 787 * really a minor hack, but it wins some CPU back. 788 */ 789 790 if (size <= 8 * 1048576) { 791 if ((p = mmap(NULL, (size_t)size, PROT_READ, 792 MAP_FILE|MAP_SHARED, from_fd, (off_t)0)) 793 == MAP_FAILED) { 794 goto mmap_failed; 795 } 796 #if defined(MADV_SEQUENTIAL) && !defined(__APPLE__) 797 if (madvise(p, (size_t)size, MADV_SEQUENTIAL) == -1 798 && errno != EOPNOTSUPP) 799 warnx("madvise: %s", strerror(errno)); 800 #endif 801 802 if (write(to_fd, p, size) != size) { 803 serrno = errno; 804 (void)unlink(to_name); 805 errx(1, "%s: write: %s", 806 to_name, strerror(serrno)); 807 } 808 switch (digesttype) { 809 case DIGEST_MD5: 810 MD5Update(&ctxMD5, p, size); 811 break; 812 case DIGEST_RMD160: 813 RMD160Update(&ctxRMD160, p, size); 814 break; 815 case DIGEST_SHA1: 816 SHA1Update(&ctxSHA1, p, size); 817 break; 818 default: 819 break; 820 } 821 (void)munmap(p, size); 822 } else { 823 mmap_failed: 824 while ((nr = read(from_fd, buf, sizeof(buf))) > 0) { 825 if ((nw = write(to_fd, buf, nr)) != nr) { 826 serrno = errno; 827 (void)unlink(to_name); 828 errx(1, "%s: write: %s", to_name, 829 strerror(nw > 0 ? EIO : serrno)); 830 } 831 switch (digesttype) { 832 case DIGEST_MD5: 833 MD5Update(&ctxMD5, buf, nr); 834 break; 835 case DIGEST_RMD160: 836 RMD160Update(&ctxRMD160, buf, nr); 837 break; 838 case DIGEST_SHA1: 839 SHA1Update(&ctxSHA1, buf, nr); 840 break; 841 default: 842 break; 843 } 844 } 845 if (nr != 0) { 846 serrno = errno; 847 (void)unlink(to_name); 848 errx(1, "%s: read: %s", from_name, strerror(serrno)); 849 } 850 } 851 } 852 switch (digesttype) { 853 case DIGEST_MD5: 854 return MD5End(&ctxMD5, NULL); 855 case DIGEST_RMD160: 856 return RMD160End(&ctxRMD160, NULL); 857 case DIGEST_SHA1: 858 return SHA1End(&ctxSHA1, NULL); 859 default: 860 return NULL; 861 } 862 } 863 864 /* 865 * strip -- 866 * use strip(1) to strip the target file 867 */ 868 void 869 strip(char *to_name) 870 { 871 int serrno, status; 872 char *stripprog; 873 874 switch (vfork()) { 875 case -1: 876 serrno = errno; 877 (void)unlink(to_name); 878 errx(1, "vfork: %s", strerror(serrno)); 879 /*NOTREACHED*/ 880 case 0: 881 stripprog = getenv("STRIP"); 882 if (stripprog == NULL) 883 stripprog = _PATH_STRIP; 884 885 if (stripArgs) { 886 /* 887 * build up a command line and let /bin/sh 888 * parse the arguments 889 */ 890 char* cmd = (char*)malloc(sizeof(char)* 891 (3+strlen(stripprog)+ 892 strlen(stripArgs)+ 893 strlen(to_name))); 894 895 if (cmd == NULL) 896 errx(1, "%s", strerror(ENOMEM)); 897 898 sprintf(cmd, "%s %s %s", stripprog, stripArgs, to_name); 899 900 execl(_PATH_BSHELL, "sh", "-c", cmd, NULL); 901 } else 902 execlp(stripprog, "strip", to_name, NULL); 903 904 warn("%s: exec of strip", stripprog); 905 _exit(1); 906 /*NOTREACHED*/ 907 default: 908 if (wait(&status) == -1 || status) 909 (void)unlink(to_name); 910 } 911 } 912 913 /* 914 * afterinstall -- 915 * run provided command on the target file or directory after it's been 916 * installed and stripped, but before permissions are set or it's renamed 917 */ 918 void 919 afterinstall(const char *command, const char *to_name, int errunlink) 920 { 921 int serrno, status; 922 char *cmd; 923 924 switch (vfork()) { 925 case -1: 926 serrno = errno; 927 if (errunlink) 928 (void)unlink(to_name); 929 errx(1, "vfork: %s", strerror(serrno)); 930 /*NOTREACHED*/ 931 case 0: 932 /* 933 * build up a command line and let /bin/sh 934 * parse the arguments 935 */ 936 cmd = (char*)malloc(sizeof(char)* 937 (2+strlen(command)+ 938 strlen(to_name))); 939 940 if (cmd == NULL) 941 errx(1, "%s", strerror(ENOMEM)); 942 943 sprintf(cmd, "%s %s", command, to_name); 944 945 execl(_PATH_BSHELL, "sh", "-c", cmd, NULL); 946 947 warn("%s: exec of after install command", command); 948 _exit(1); 949 /*NOTREACHED*/ 950 default: 951 if ((wait(&status) == -1 || status) && errunlink) 952 (void)unlink(to_name); 953 } 954 } 955 956 /* 957 * backup -- 958 * backup file "to_name" to to_name.suffix 959 * if suffix contains a "%", it's taken as a printf(3) pattern 960 * used for a numbered backup. 961 */ 962 void 963 backup(const char *to_name) 964 { 965 char bname[FILENAME_MAX]; 966 967 if (numberedbackup) { 968 /* Do numbered backup */ 969 int cnt; 970 char suffix_expanded[FILENAME_MAX]; 971 972 cnt=0; 973 do { 974 (void)snprintf(suffix_expanded, FILENAME_MAX, suffix, 975 cnt); 976 (void)snprintf(bname, FILENAME_MAX, "%s%s", to_name, 977 suffix_expanded); 978 cnt++; 979 } while (access(bname, F_OK) == 0); 980 } else { 981 /* Do simple backup */ 982 (void)snprintf(bname, FILENAME_MAX, "%s%s", to_name, suffix); 983 } 984 985 (void)rename(to_name, bname); 986 } 987 988 /* 989 * install_dir -- 990 * build directory hierarchy 991 */ 992 void 993 install_dir(char *path, u_int flags) 994 { 995 char *p; 996 struct stat sb; 997 int ch; 998 999 for (p = path;; ++p) 1000 if (!*p || (p != path && *p == '/')) { 1001 ch = *p; 1002 *p = '\0'; 1003 if (stat(path, &sb)) { 1004 if (errno != ENOENT || mkdir(path, 0777) < 0) { 1005 err(1, "%s: mkdir", path); 1006 } 1007 } 1008 else if (!S_ISDIR(sb.st_mode)) { 1009 errx(1, "%s exists but is not a directory", path); 1010 } 1011 if (!(*p = ch)) 1012 break; 1013 } 1014 1015 if (afterinstallcmd != NULL) 1016 afterinstall(afterinstallcmd, path, 0); 1017 1018 if (!dounpriv && ( 1019 ((flags & (HASUID | HASGID)) && chown(path, uid, gid) == -1) 1020 || chmod(path, mode) == -1 )) { 1021 warn("%s: chown/chmod", path); 1022 } 1023 metadata_log(path, "dir", NULL, NULL, NULL); 1024 } 1025 1026 /* 1027 * metadata_log -- 1028 * if metafp is not NULL, output mtree(8) full path name and settings to 1029 * metafp, to allow permissions to be set correctly by other tools. 1030 */ 1031 void 1032 metadata_log(const char *path, const char *type, struct timeval *tv, 1033 const char *link, const char *digestresult) 1034 { 1035 static const char extra[] = { ' ', '\t', '\n', '\\', '#', '\0' }; 1036 const char *p; 1037 char *buf; 1038 size_t destlen; 1039 struct flock metalog_lock; 1040 1041 if (!metafp) 1042 return; 1043 buf = (char *)malloc(4 * strlen(path) + 1); /* buf for strsvis(3) */ 1044 if (buf == NULL) { 1045 warnx("%s", strerror(ENOMEM)); 1046 return; 1047 } 1048 /* lock log file */ 1049 metalog_lock.l_start = 0; 1050 metalog_lock.l_len = 0; 1051 metalog_lock.l_whence = SEEK_SET; 1052 metalog_lock.l_type = F_WRLCK; 1053 if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) { 1054 warn("can't lock %s", metafile); 1055 free(buf); 1056 return; 1057 } 1058 1059 p = path; /* remove destdir */ 1060 if (destdir) { 1061 destlen = strlen(destdir); 1062 if (strncmp(p, destdir, destlen) == 0 && 1063 (p[destlen] == '/' || p[destlen] == '\0')) 1064 p += destlen; 1065 } 1066 while (*p && *p == '/') /* remove leading /s */ 1067 p++; 1068 strsvis(buf, p, VIS_CSTYLE, extra); /* encode name */ 1069 p = buf; 1070 /* print details */ 1071 fprintf(metafp, ".%s%s type=%s mode=%#o", *p ? "/" : "", p, type, mode); 1072 if (link) { 1073 strsvis(buf, link, VIS_CSTYLE, extra); /* encode link */ 1074 fprintf(metafp, " link=%s", buf); 1075 } 1076 if (owner) 1077 fprintf(metafp, " uname=%s", owner); 1078 if (group) 1079 fprintf(metafp, " gname=%s", group); 1080 if (fflags) 1081 fprintf(metafp, " flags=%s", fflags); 1082 if (tags) 1083 fprintf(metafp, " tags=%s", tags); 1084 if (tv != NULL && dopreserve) 1085 fprintf(metafp, " time=%ld.%ld", tv[1].tv_sec, tv[1].tv_usec); 1086 if (digestresult && digest) 1087 fprintf(metafp, " %s=%s", digest, digestresult); 1088 fputc('\n', metafp); 1089 fflush(metafp); /* flush output */ 1090 /* unlock log file */ 1091 metalog_lock.l_type = F_UNLCK; 1092 if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) { 1093 warn("can't unlock %s", metafile); 1094 } 1095 free(buf); 1096 } 1097 1098 /* 1099 * xbasename -- 1100 * libc basename(3) that returns a pointer to a static buffer 1101 * instead of overwriting that passed-in string. 1102 */ 1103 char * 1104 xbasename(char *path) 1105 { 1106 static char tmp[MAXPATHLEN]; 1107 1108 (void)strlcpy(tmp, path, sizeof(tmp)); 1109 return (basename(tmp)); 1110 } 1111 1112 /* 1113 * xdirname -- 1114 * libc dirname(3) that returns a pointer to a static buffer 1115 * instead of overwriting that passed-in string. 1116 */ 1117 char * 1118 xdirname(char *path) 1119 { 1120 static char tmp[MAXPATHLEN]; 1121 1122 (void)strlcpy(tmp, path, sizeof(tmp)); 1123 return (dirname(tmp)); 1124 } 1125 1126 /* 1127 * usage -- 1128 * print a usage message and die 1129 */ 1130 void 1131 usage(void) 1132 { 1133 const char *prog; 1134 1135 prog = getprogname(); 1136 1137 (void)fprintf(stderr, 1138 "usage: %s [-Ubcprs] [-M log] [-D dest] [-T tags] [-B suffix]\n" 1139 " [-a aftercmd] [-f flags] [-m mode] [-N dbdir] [-o owner] [-g group] \n" 1140 " [-l linkflags] [-h hash] [-S stripflags] file1 file2\n" 1141 " %s [-Ubcprs] [-M log] [-D dest] [-T tags] [-B suffix]\n" 1142 " [-a aftercmd] [-f flags] [-m mode] [-N dbdir] [-o owner] [-g group]\n" 1143 " [-l linkflags] [-h hash] [-S stripflags] file1 ... fileN directory\n" 1144 " %s -d [-Up] [-M log] [-D dest] [-T tags] [-a aftercmd] [-m mode]\n" 1145 " [-N dbdir] [-o owner] [-g group] directory ...\n", 1146 prog, prog, prog); 1147 exit(1); 1148 } 1149
Indexes created Sun Sep 28 16:09:52 GMT 2025