xinstall.c revision 1.85
1 /* $NetBSD: xinstall.c,v 1.85 2004/01/30 01:38:25 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\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 1.85 2004/01/30 01:38:25 lukem Exp $"); 50 #endif 51 #endif /* not lint */ 52 53 #include <sys/param.h> 54 #include <sys/mman.h> 55 #include <sys/stat.h> 56 #include <sys/wait.h> 57 58 #include <ctype.h> 59 #include <err.h> 60 #include <errno.h> 61 #include <fcntl.h> 62 #include <grp.h> 63 #include <libgen.h> 64 #include <paths.h> 65 #include <pwd.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <unistd.h> 70 #include <vis.h> 71 72 #include <md5.h> 73 #include <rmd160.h> 74 #include <sha1.h> 75 76 #include "pathnames.h" 77 #include "stat_flags.h" 78 #include "mtree.h" 79 80 #define STRIP_ARGS_MAX 32 81 #define BACKUP_SUFFIX ".old" 82 83 int dobackup, dodir, dostrip, dolink, dopreserve, dorename, dounpriv; 84 int numberedbackup; 85 int mode = S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 86 char pathbuf[MAXPATHLEN]; 87 id_t uid = -1, gid = -1; 88 char *group, *owner, *fflags, *tags; 89 FILE *metafp; 90 char *metafile; 91 u_long fileflags; 92 char *stripArgs; 93 char *afterinstallcmd; 94 char *suffix = BACKUP_SUFFIX; 95 char *destdir; 96 97 enum { 98 DIGEST_NONE = 0, 99 DIGEST_MD5, 100 DIGEST_RMD160, 101 DIGEST_SHA1, 102 } digesttype = DIGEST_NONE; 103 char *digest; 104 105 #define LN_ABSOLUTE 0x01 106 #define LN_RELATIVE 0x02 107 #define LN_HARD 0x04 108 #define LN_SYMBOLIC 0x08 109 #define LN_MIXED 0x10 110 111 #define DIRECTORY 0x01 /* Tell install it's a directory. */ 112 #define SETFLAGS 0x02 /* Tell install to set flags. */ 113 #define HASUID 0x04 /* Tell install the uid was given */ 114 #define HASGID 0x08 /* Tell install the gid was given */ 115 116 void afterinstall(const char *, const char *, int); 117 void backup(const char *); 118 char *copy(int, char *, int, char *, off_t); 119 int do_link(char *, char *); 120 void do_symlink(char *, char *); 121 void install(char *, char *, u_int); 122 void install_dir(char *, u_int); 123 int main(int, char *[]); 124 void makelink(char *, char *); 125 void metadata_log(const char *, const char *, struct timeval *, 126 const char *, const char *); 127 int parseid(char *, id_t *); 128 void strip(char *); 129 void usage(void); 130 char *xbasename(char *); 131 char *xdirname(char *); 132 133 int 134 main(int argc, char *argv[]) 135 { 136 struct stat from_sb, to_sb; 137 void *set; 138 u_int iflags; 139 int ch, no_target; 140 char *p, *to_name; 141 142 setprogname(argv[0]); 143 144 iflags = 0; 145 while ((ch = getopt(argc, argv, "a:cbB:dD:f:g:h:l:m:M:N:o:prsS:T:U")) 146 != -1) 147 switch((char)ch) { 148 case 'a': 149 afterinstallcmd = strdup(optarg); 150 if (afterinstallcmd == NULL) 151 errx(1, "%s", strerror(ENOMEM)); 152 break; 153 case 'B': 154 suffix = optarg; 155 numberedbackup = 0; 156 { 157 /* Check if given suffix really generates 158 different suffixes - catch e.g. ".%" */ 159 char suffix_expanded0[FILENAME_MAX], 160 suffix_expanded1[FILENAME_MAX]; 161 (void)snprintf(suffix_expanded0, FILENAME_MAX, 162 suffix, 0); 163 (void)snprintf(suffix_expanded1, FILENAME_MAX, 164 suffix, 1); 165 if (strcmp(suffix_expanded0, suffix_expanded1) 166 != 0) 167 numberedbackup = 1; 168 } 169 /* fall through; -B implies -b */ 170 /*FALLTHROUGH*/ 171 case 'b': 172 dobackup = 1; 173 break; 174 case 'c': 175 /* ignored; was "docopy" which is now the default. */ 176 break; 177 case 'd': 178 dodir = 1; 179 break; 180 case 'D': 181 destdir = optarg; 182 break; 183 #if ! HAVE_NBTOOL_CONFIG_H 184 case 'f': 185 fflags = optarg; 186 break; 187 #endif 188 case 'g': 189 group = optarg; 190 break; 191 case 'h': 192 digest = optarg; 193 break; 194 case 'l': 195 for (p = optarg; *p; p++) 196 switch (*p) { 197 case 's': 198 dolink &= ~(LN_HARD|LN_MIXED); 199 dolink |= LN_SYMBOLIC; 200 break; 201 case 'h': 202 dolink &= ~(LN_SYMBOLIC|LN_MIXED); 203 dolink |= LN_HARD; 204 break; 205 case 'm': 206 dolink &= ~(LN_SYMBOLIC|LN_HARD); 207 dolink |= LN_MIXED; 208 break; 209 case 'a': 210 dolink &= ~LN_RELATIVE; 211 dolink |= LN_ABSOLUTE; 212 break; 213 case 'r': 214 dolink &= ~LN_ABSOLUTE; 215 dolink |= LN_RELATIVE; 216 break; 217 default: 218 errx(1, "%c: invalid link type", *p); 219 /* NOTREACHED */ 220 } 221 break; 222 case 'm': 223 if (!(set = setmode(optarg))) 224 errx(1, "%s: invalid file mode", optarg); 225 mode = getmode(set, 0); 226 free(set); 227 break; 228 case 'M': 229 metafile = optarg; 230 break; 231 case 'N': 232 if (! setup_getid(optarg)) 233 errx(1, 234 "Unable to use user and group databases in `%s'", 235 optarg); 236 break; 237 case 'o': 238 owner = optarg; 239 break; 240 case 'p': 241 dopreserve = 1; 242 break; 243 case 'r': 244 dorename = 1; 245 break; 246 case 'S': 247 stripArgs = strdup(optarg); 248 if (stripArgs == NULL) 249 errx(1, "%s", strerror(ENOMEM)); 250 /* fall through; -S implies -s */ 251 /*FALLTHROUGH*/ 252 case 's': 253 dostrip = 1; 254 break; 255 case 'T': 256 tags = optarg; 257 break; 258 case 'U': 259 dounpriv = 1; 260 break; 261 case '?': 262 default: 263 usage(); 264 } 265 argc -= optind; 266 argv += optind; 267 268 /* strip and link options make no sense when creating directories */ 269 if ((dostrip || dolink) && dodir) 270 usage(); 271 272 /* strip and flags make no sense with links */ 273 if ((dostrip || fflags) && dolink) 274 usage(); 275 276 /* must have at least two arguments, except when creating directories */ 277 if (argc < 2 && !dodir) 278 usage(); 279 280 if (digest) { 281 if (0) { 282 } else if (strcmp(digest, "none") == 0) { 283 digesttype = DIGEST_NONE; 284 } else if (strcmp(digest, "md5") == 0) { 285 digesttype = DIGEST_MD5; 286 } else if (strcmp(digest, "rmd160") == 0) { 287 digesttype = DIGEST_RMD160; 288 } else if (strcmp(digest, "sha1") == 0) { 289 digesttype = DIGEST_SHA1; 290 } else { 291 warnx("unknown digest `%s'", digest); 292 usage(); 293 } 294 } 295 296 /* get group and owner id's */ 297 if (group && !dounpriv) { 298 if (gid_from_group(group, &gid) == -1 && ! parseid(group, &gid)) 299 errx(1, "unknown group %s", group); 300 iflags |= HASGID; 301 } 302 if (owner && !dounpriv) { 303 if (uid_from_user(owner, &uid) == -1 && ! parseid(owner, &uid)) 304 errx(1, "unknown user %s", owner); 305 iflags |= HASUID; 306 } 307 308 #if ! HAVE_NBTOOL_CONFIG_H 309 if (fflags && !dounpriv) { 310 if (string_to_flags(&fflags, &fileflags, NULL)) 311 errx(1, "%s: invalid flag", fflags); 312 iflags |= SETFLAGS; 313 } 314 #endif 315 316 if (metafile) { 317 if ((metafp = fopen(metafile, "a")) == NULL) 318 warn("open %s", metafile); 319 } else 320 digesttype = DIGEST_NONE; 321 322 if (dodir) { 323 for (; *argv != NULL; ++argv) 324 install_dir(*argv, iflags); 325 exit (0); 326 } 327 328 no_target = stat(to_name = argv[argc - 1], &to_sb); 329 if (!no_target && S_ISDIR(to_sb.st_mode)) { 330 for (; *argv != to_name; ++argv) 331 install(*argv, to_name, iflags | DIRECTORY); 332 exit(0); 333 } 334 335 /* can't do file1 file2 directory/file */ 336 if (argc != 2) 337 usage(); 338 339 if (!no_target) { 340 /* makelink() handles checks for links */ 341 if (!dolink) { 342 if (stat(*argv, &from_sb)) 343 err(1, "%s: stat", *argv); 344 if (!S_ISREG(to_sb.st_mode)) 345 errx(1, "%s: not a regular file", to_name); 346 if (to_sb.st_dev == from_sb.st_dev && 347 to_sb.st_ino == from_sb.st_ino) 348 errx(1, "%s and %s are the same file", *argv, 349 to_name); 350 } 351 /* 352 * Unlink now... avoid ETXTBSY errors later. Try and turn 353 * off the append/immutable bits -- if we fail, go ahead, 354 * it might work. 355 */ 356 #if ! HAVE_NBTOOL_CONFIG_H 357 #define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND) 358 if (to_sb.st_flags & NOCHANGEBITS) 359 (void)chflags(to_name, 360 to_sb.st_flags & ~(NOCHANGEBITS)); 361 #endif 362 if (dobackup) 363 backup(to_name); 364 else if (!dorename) 365 (void)unlink(to_name); 366 } 367 install(*argv, to_name, iflags); 368 exit(0); 369 } 370 371 /* 372 * parseid -- 373 * parse uid or gid from arg into id, returning non-zero if successful 374 */ 375 int 376 parseid(char *name, id_t *id) 377 { 378 char *ep; 379 380 errno = 0; 381 *id = (id_t)strtoul(name, &ep, 10); 382 if (errno || *ep != '\0') 383 return (0); 384 return (1); 385 } 386 387 /* 388 * do_link -- 389 * make a hard link, obeying dorename if set 390 * return -1 on failure 391 */ 392 int 393 do_link(char *from_name, char *to_name) 394 { 395 char tmpl[MAXPATHLEN]; 396 int ret; 397 398 if (dorename) { 399 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 400 xdirname(to_name)); 401 /* This usage is safe. The linker will bitch anyway. */ 402 if (mktemp(tmpl) == NULL) 403 err(1, "%s: mktemp", tmpl); 404 ret = link(from_name, tmpl); 405 if (ret == 0) { 406 ret = rename(tmpl, to_name); 407 if (ret < 0) 408 /* remove temporary link before exiting */ 409 (void)unlink(tmpl); 410 } 411 return (ret); 412 } else 413 return (link(from_name, to_name)); 414 } 415 416 /* 417 * do_symlink -- 418 * make a symbolic link, obeying dorename if set 419 * exit on failure 420 */ 421 void 422 do_symlink(char *from_name, char *to_name) 423 { 424 char tmpl[MAXPATHLEN]; 425 426 if (dorename) { 427 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 428 xdirname(to_name)); 429 /* This usage is safe. The linker will bitch anyway. */ 430 if (mktemp(tmpl) == NULL) 431 err(1, "%s: mktemp", tmpl); 432 433 if (symlink(from_name, tmpl) == -1) 434 err(1, "symlink %s -> %s", from_name, tmpl); 435 if (rename(tmpl, to_name) == -1) { 436 /* remove temporary link before exiting */ 437 (void)unlink(tmpl); 438 err(1, "%s: rename", to_name); 439 } 440 } else { 441 if (symlink(from_name, to_name) == -1) 442 err(1, "symlink %s -> %s", from_name, to_name); 443 } 444 } 445 446 /* 447 * makelink -- 448 * make a link from source to destination 449 */ 450 void 451 makelink(char *from_name, char *to_name) 452 { 453 char src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN]; 454 struct stat to_sb; 455 456 /* Try hard links first */ 457 if (dolink & (LN_HARD|LN_MIXED)) { 458 if (do_link(from_name, to_name) == -1) { 459 if ((dolink & LN_HARD) || errno != EXDEV) 460 err(1, "link %s -> %s", from_name, to_name); 461 } else { 462 if (stat(to_name, &to_sb)) 463 err(1, "%s: stat", to_name); 464 if (S_ISREG(to_sb.st_mode)) { 465 /* XXX: only metalog hardlinked files */ 466 int omode; 467 char *oowner, *ogroup, *offlags; 468 char *dres; 469 470 /* XXX: use underlying perms */ 471 omode = mode; 472 mode = (to_sb.st_mode & 0777); 473 oowner = owner; 474 owner = NULL; 475 ogroup = group; 476 group = NULL; 477 offlags = fflags; 478 fflags = NULL; 479 switch (digesttype) { 480 case DIGEST_MD5: 481 dres = MD5File(from_name, NULL); 482 break; 483 case DIGEST_RMD160: 484 dres = RMD160File(from_name, NULL); 485 break; 486 case DIGEST_SHA1: 487 dres = SHA1File(from_name, NULL); 488 break; 489 default: 490 dres = NULL; 491 } 492 metadata_log(to_name, "file", NULL, NULL, dres); 493 free(dres); 494 mode = omode; 495 owner = oowner; 496 group = ogroup; 497 fflags = offlags; 498 } 499 return; 500 } 501 } 502 503 /* Symbolic links */ 504 if (dolink & LN_ABSOLUTE) { 505 /* Convert source path to absolute */ 506 if (realpath(from_name, src) == NULL) 507 err(1, "%s: realpath", from_name); 508 do_symlink(src, to_name); 509 metadata_log(to_name, "link", NULL, src, NULL); 510 return; 511 } 512 513 if (dolink & LN_RELATIVE) { 514 char *cp, *d, *s; 515 516 /* Resolve pathnames */ 517 if (realpath(from_name, src) == NULL) 518 err(1, "%s: realpath", from_name); 519 520 /* 521 * The last component of to_name may be a symlink, 522 * so use realpath to resolve only the directory. 523 */ 524 cp = xdirname(to_name); 525 if (realpath(cp, dst) == NULL) 526 err(1, "%s: realpath", cp); 527 /* .. and add the last component */ 528 if (strcmp(dst, "/") != 0) { 529 if (strlcat(dst, "/", sizeof(dst)) > sizeof(dst)) 530 errx(1, "resolved pathname too long"); 531 } 532 cp = xbasename(to_name); 533 if (strlcat(dst, cp, sizeof(dst)) > sizeof(dst)) 534 errx(1, "resolved pathname too long"); 535 536 /* trim common path components */ 537 for (s = src, d = dst; *s == *d; s++, d++) 538 continue; 539 while (*s != '/') 540 s--, d--; 541 542 /* count the number of directories we need to backtrack */ 543 for (++d, lnk[0] = '\0'; *d; d++) 544 if (*d == '/') 545 (void)strlcat(lnk, "../", sizeof(lnk)); 546 547 (void)strlcat(lnk, ++s, sizeof(lnk)); 548 549 do_symlink(lnk, dst); 550 metadata_log(dst, "link", NULL, lnk, NULL); 551 return; 552 } 553 554 /* 555 * If absolute or relative was not specified, 556 * try the names the user provided 557 */ 558 do_symlink(from_name, to_name); 559 metadata_log(to_name, "link", NULL, from_name, NULL); 560 } 561 562 /* 563 * install -- 564 * build a path name and install the file 565 */ 566 void 567 install(char *from_name, char *to_name, u_int flags) 568 { 569 struct stat from_sb; 570 #if ! HAVE_NBTOOL_CONFIG_H 571 struct stat to_sb; 572 #endif 573 struct timeval tv[2]; 574 int devnull, from_fd, to_fd, serrno, tmpmode; 575 char *p, tmpl[MAXPATHLEN], *oto_name, *digestresult; 576 577 if (!dolink) { 578 /* ensure that from_sb & tv are sane if !dolink */ 579 if (stat(from_name, &from_sb)) 580 err(1, "%s: stat", from_name); 581 #ifdef BSD4_4 582 TIMESPEC_TO_TIMEVAL(&tv[0], &from_sb.st_atimespec); 583 TIMESPEC_TO_TIMEVAL(&tv[1], &from_sb.st_mtimespec); 584 #else 585 tv[0].tv_sec = from_sb.st_atime; 586 tv[0].tv_usec = 0; 587 tv[1].tv_sec = from_sb.st_mtime; 588 tv[1].tv_usec = 0; 589 #endif 590 } 591 592 if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) { 593 if (!dolink) { 594 if (!S_ISREG(from_sb.st_mode)) 595 errx(1, "%s: not a regular file", from_name); 596 } 597 /* Build the target path. */ 598 if (flags & DIRECTORY) { 599 (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s", 600 to_name, 601 (p = strrchr(from_name, '/')) ? ++p : from_name); 602 to_name = pathbuf; 603 } 604 devnull = 0; 605 } else { 606 #if HAVE_STRUCT_STAT_ST_FLAGS 607 from_sb.st_flags = 0; /* XXX */ 608 #endif 609 devnull = 1; 610 } 611 612 /* 613 * Unlink now... avoid ETXTBSY errors later. Try and turn 614 * off the append/immutable bits -- if we fail, go ahead, 615 * it might work. 616 */ 617 #if ! HAVE_NBTOOL_CONFIG_H 618 if (stat(to_name, &to_sb) == 0 && 619 to_sb.st_flags & (NOCHANGEBITS)) 620 (void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS)); 621 #endif 622 if (dorename) { 623 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 624 xdirname(to_name)); 625 oto_name = to_name; 626 to_name = tmpl; 627 } else { 628 oto_name = NULL; /* pacify gcc */ 629 if (dobackup) 630 backup(to_name); 631 else 632 (void)unlink(to_name); 633 } 634 635 if (dolink) { 636 makelink(from_name, dorename ? oto_name : to_name); 637 return; 638 } 639 640 /* Create target. */ 641 if (dorename) { 642 if ((to_fd = mkstemp(to_name)) == -1) 643 err(1, "%s: mkstemp", to_name); 644 } else { 645 if ((to_fd = open(to_name, 646 O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0) 647 err(1, "%s: open", to_name); 648 } 649 if (!devnull) { 650 if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) { 651 (void)unlink(to_name); 652 err(1, "%s: open", from_name); 653 } 654 digestresult = 655 copy(from_fd, from_name, to_fd, to_name, from_sb.st_size); 656 (void)close(from_fd); 657 } 658 659 if (dostrip) { 660 strip(to_name); 661 662 /* 663 * Re-open our fd on the target, in case we used a strip 664 * that does not work in-place -- like gnu binutils strip. 665 */ 666 close(to_fd); 667 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 668 err(1, "stripping %s", to_name); 669 } 670 671 if (afterinstallcmd != NULL) { 672 afterinstall(afterinstallcmd, to_name, 1); 673 674 /* 675 * Re-open our fd on the target, in case we used an 676 * after-install command that does not work in-place 677 */ 678 close(to_fd); 679 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 680 err(1, "running after install command on %s", to_name); 681 } 682 683 /* 684 * Set owner, group, mode for target; do the chown first, 685 * chown may lose the setuid bits. 686 */ 687 if (!dounpriv && 688 (flags & (HASUID | HASGID)) && fchown(to_fd, uid, gid) == -1) { 689 serrno = errno; 690 (void)unlink(to_name); 691 errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno)); 692 } 693 tmpmode = mode; 694 if (dounpriv) 695 tmpmode &= S_IRWXU|S_IRWXG|S_IRWXO; 696 if (fchmod(to_fd, tmpmode) == -1) { 697 serrno = errno; 698 (void)unlink(to_name); 699 errx(1, "%s: chmod: %s", to_name, strerror(serrno)); 700 } 701 702 /* 703 * Preserve the date of the source file. 704 */ 705 if (dopreserve) { 706 #if HAVE_FUTIMES 707 if (futimes(to_fd, tv) == -1) 708 warn("%s: futimes", to_name); 709 #else 710 if (utimes(to_name, tv) == -1) 711 warn("%s: utimes", to_name); 712 #endif 713 } 714 715 (void)close(to_fd); 716 717 if (dorename) { 718 if (rename(to_name, oto_name) == -1) 719 err(1, "%s: rename", to_name); 720 to_name = oto_name; 721 } 722 723 /* 724 * If provided a set of flags, set them, otherwise, preserve the 725 * flags, except for the dump flag. 726 */ 727 #if ! HAVE_NBTOOL_CONFIG_H 728 if (!dounpriv && chflags(to_name, 729 flags & SETFLAGS ? fileflags : from_sb.st_flags & ~UF_NODUMP) == -1) 730 { 731 if (errno != EOPNOTSUPP || (from_sb.st_flags & ~UF_NODUMP) != 0) 732 warn("%s: chflags", to_name); 733 } 734 #endif 735 736 metadata_log(to_name, "file", tv, NULL, digestresult); 737 free(digestresult); 738 } 739 740 /* 741 * copy -- 742 * copy from one file to another 743 */ 744 char * 745 copy(int from_fd, char *from_name, int to_fd, char *to_name, off_t size) 746 { 747 ssize_t nr, nw; 748 int serrno; 749 char *p; 750 char buf[MAXBSIZE]; 751 MD5_CTX ctxMD5; 752 RMD160_CTX ctxRMD160; 753 SHA1_CTX ctxSHA1; 754 755 switch (digesttype) { 756 case DIGEST_MD5: 757 MD5Init(&ctxMD5); 758 break; 759 case DIGEST_RMD160: 760 RMD160Init(&ctxRMD160); 761 break; 762 case DIGEST_SHA1: 763 SHA1Init(&ctxSHA1); 764 break; 765 case DIGEST_NONE: 766 default: 767 break; 768 } 769 /* 770 * There's no reason to do anything other than close the file 771 * now if it's empty, so let's not bother. 772 */ 773 if (size > 0) { 774 775 /* 776 * Mmap and write if less than 8M (the limit is so we 777 * don't totally trash memory on big files). This is 778 * really a minor hack, but it wins some CPU back. 779 */ 780 781 if (size <= 8 * 1048576) { 782 if ((p = mmap(NULL, (size_t)size, PROT_READ, 783 MAP_FILE|MAP_SHARED, from_fd, (off_t)0)) 784 == MAP_FAILED) { 785 goto mmap_failed; 786 } 787 #if defined(MADV_SEQUENTIAL) && !defined(__APPLE__) 788 if (madvise(p, (size_t)size, MADV_SEQUENTIAL) == -1 789 && errno != EOPNOTSUPP) 790 warnx("madvise: %s", strerror(errno)); 791 #endif 792 793 if (write(to_fd, p, size) != size) { 794 serrno = errno; 795 (void)unlink(to_name); 796 errx(1, "%s: write: %s", 797 to_name, strerror(serrno)); 798 } 799 switch (digesttype) { 800 case DIGEST_MD5: 801 MD5Update(&ctxMD5, p, size); 802 break; 803 case DIGEST_RMD160: 804 RMD160Update(&ctxRMD160, p, size); 805 break; 806 case DIGEST_SHA1: 807 SHA1Update(&ctxSHA1, p, size); 808 break; 809 default: 810 break; 811 } 812 (void)munmap(p, size); 813 } else { 814 mmap_failed: 815 while ((nr = read(from_fd, buf, sizeof(buf))) > 0) { 816 if ((nw = write(to_fd, buf, nr)) != nr) { 817 serrno = errno; 818 (void)unlink(to_name); 819 errx(1, "%s: write: %s", to_name, 820 strerror(nw > 0 ? EIO : serrno)); 821 } 822 switch (digesttype) { 823 case DIGEST_MD5: 824 MD5Update(&ctxMD5, buf, nr); 825 break; 826 case DIGEST_RMD160: 827 RMD160Update(&ctxRMD160, buf, nr); 828 break; 829 case DIGEST_SHA1: 830 SHA1Update(&ctxSHA1, buf, nr); 831 break; 832 default: 833 break; 834 } 835 } 836 if (nr != 0) { 837 serrno = errno; 838 (void)unlink(to_name); 839 errx(1, "%s: read: %s", from_name, strerror(serrno)); 840 } 841 } 842 } 843 switch (digesttype) { 844 case DIGEST_MD5: 845 return MD5End(&ctxMD5, NULL); 846 case DIGEST_RMD160: 847 return RMD160End(&ctxRMD160, NULL); 848 case DIGEST_SHA1: 849 return SHA1End(&ctxSHA1, NULL); 850 default: 851 return NULL; 852 } 853 } 854 855 /* 856 * strip -- 857 * use strip(1) to strip the target file 858 */ 859 void 860 strip(char *to_name) 861 { 862 int serrno, status; 863 char *stripprog; 864 865 switch (vfork()) { 866 case -1: 867 serrno = errno; 868 (void)unlink(to_name); 869 errx(1, "vfork: %s", strerror(serrno)); 870 /*NOTREACHED*/ 871 case 0: 872 stripprog = getenv("STRIP"); 873 if (stripprog == NULL) 874 stripprog = _PATH_STRIP; 875 876 if (stripArgs) { 877 /* 878 * build up a command line and let /bin/sh 879 * parse the arguments 880 */ 881 char* cmd = (char*)malloc(sizeof(char)* 882 (3+strlen(stripprog)+ 883 strlen(stripArgs)+ 884 strlen(to_name))); 885 886 if (cmd == NULL) 887 errx(1, "%s", strerror(ENOMEM)); 888 889 sprintf(cmd, "%s %s %s", stripprog, stripArgs, to_name); 890 891 execl(_PATH_BSHELL, "sh", "-c", cmd, NULL); 892 } else 893 execlp(stripprog, "strip", to_name, NULL); 894 895 warn("%s: exec of strip", stripprog); 896 _exit(1); 897 /*NOTREACHED*/ 898 default: 899 if (wait(&status) == -1 || status) 900 (void)unlink(to_name); 901 } 902 } 903 904 /* 905 * afterinstall -- 906 * run provided command on the target file or directory after it's been 907 * installed and stripped, but before permissions are set or it's renamed 908 */ 909 void 910 afterinstall(const char *command, const char *to_name, int errunlink) 911 { 912 int serrno, status; 913 char *cmd; 914 915 switch (vfork()) { 916 case -1: 917 serrno = errno; 918 if (errunlink) 919 (void)unlink(to_name); 920 errx(1, "vfork: %s", strerror(serrno)); 921 /*NOTREACHED*/ 922 case 0: 923 /* 924 * build up a command line and let /bin/sh 925 * parse the arguments 926 */ 927 cmd = (char*)malloc(sizeof(char)* 928 (2+strlen(command)+ 929 strlen(to_name))); 930 931 if (cmd == NULL) 932 errx(1, "%s", strerror(ENOMEM)); 933 934 sprintf(cmd, "%s %s", command, to_name); 935 936 execl(_PATH_BSHELL, "sh", "-c", cmd, NULL); 937 938 warn("%s: exec of after install command", command); 939 _exit(1); 940 /*NOTREACHED*/ 941 default: 942 if ((wait(&status) == -1 || status) && errunlink) 943 (void)unlink(to_name); 944 } 945 } 946 947 /* 948 * backup -- 949 * backup file "to_name" to to_name.suffix 950 * if suffix contains a "%", it's taken as a printf(3) pattern 951 * used for a numbered backup. 952 */ 953 void 954 backup(const char *to_name) 955 { 956 char bname[FILENAME_MAX]; 957 958 if (numberedbackup) { 959 /* Do numbered backup */ 960 int cnt; 961 char suffix_expanded[FILENAME_MAX]; 962 963 cnt=0; 964 do { 965 (void)snprintf(suffix_expanded, FILENAME_MAX, suffix, 966 cnt); 967 (void)snprintf(bname, FILENAME_MAX, "%s%s", to_name, 968 suffix_expanded); 969 cnt++; 970 } while (access(bname, F_OK) == 0); 971 } else { 972 /* Do simple backup */ 973 (void)snprintf(bname, FILENAME_MAX, "%s%s", to_name, suffix); 974 } 975 976 (void)rename(to_name, bname); 977 } 978 979 /* 980 * install_dir -- 981 * build directory hierarchy 982 */ 983 void 984 install_dir(char *path, u_int flags) 985 { 986 char *p; 987 struct stat sb; 988 int ch; 989 990 for (p = path;; ++p) 991 if (!*p || (p != path && *p == '/')) { 992 ch = *p; 993 *p = '\0'; 994 if (stat(path, &sb)) { 995 if (errno != ENOENT || mkdir(path, 0777) < 0) { 996 err(1, "%s: mkdir", path); 997 } 998 } 999 if (!(*p = ch)) 1000 break; 1001 } 1002 1003 if (afterinstallcmd != NULL) 1004 afterinstall(afterinstallcmd, path, 0); 1005 1006 if (!dounpriv && ( 1007 ((flags & (HASUID | HASGID)) && chown(path, uid, gid) == -1) 1008 || chmod(path, mode) == -1 )) { 1009 warn("%s: chown/chmod", path); 1010 } 1011 metadata_log(path, "dir", NULL, NULL, NULL); 1012 } 1013 1014 /* 1015 * metadata_log -- 1016 * if metafp is not NULL, output mtree(8) full path name and settings to 1017 * metafp, to allow permissions to be set correctly by other tools. 1018 */ 1019 void 1020 metadata_log(const char *path, const char *type, struct timeval *tv, 1021 const char *link, const char *digestresult) 1022 { 1023 static const char extra[] = { ' ', '\t', '\n', '\\', '#', '\0' }; 1024 char *buf, *p; 1025 size_t destlen; 1026 struct flock metalog_lock; 1027 1028 if (!metafp) 1029 return; 1030 buf = (char *)malloc(4 * strlen(path) + 1); /* buf for strsvis(3) */ 1031 if (buf == NULL) { 1032 warnx("%s", strerror(ENOMEM)); 1033 return; 1034 } 1035 /* lock log file */ 1036 metalog_lock.l_start = 0; 1037 metalog_lock.l_len = 0; 1038 metalog_lock.l_whence = SEEK_SET; 1039 metalog_lock.l_type = F_WRLCK; 1040 if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) { 1041 warn("can't lock %s", metafile); 1042 return; 1043 } 1044 1045 strsvis(buf, path, VIS_CSTYLE, extra); /* encode name */ 1046 p = buf; /* remove destdir */ 1047 if (destdir) { 1048 destlen = strlen(destdir); 1049 if (strncmp(p, destdir, destlen) == 0 && 1050 (p[destlen] == '/' || p[destlen] == '\0')) 1051 p += destlen; 1052 } 1053 while (*p && *p == '/') /* remove leading /s */ 1054 p++; 1055 /* print details */ 1056 fprintf(metafp, ".%s%s type=%s mode=%#o", *p ? "/" : "", p, type, mode); 1057 if (link) 1058 fprintf(metafp, " link=%s", link); 1059 if (owner) 1060 fprintf(metafp, " uname=%s", owner); 1061 if (group) 1062 fprintf(metafp, " gname=%s", group); 1063 if (fflags) 1064 fprintf(metafp, " flags=%s", fflags); 1065 if (tags) 1066 fprintf(metafp, " tags=%s", tags); 1067 if (tv != NULL && dopreserve) 1068 fprintf(metafp, " time=%ld.%ld", tv[1].tv_sec, tv[1].tv_usec); 1069 if (digestresult && digest) 1070 fprintf(metafp, " %s=%s", digest, digestresult); 1071 fputc('\n', metafp); 1072 fflush(metafp); /* flush output */ 1073 /* unlock log file */ 1074 metalog_lock.l_type = F_UNLCK; 1075 if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) { 1076 warn("can't unlock %s", metafile); 1077 } 1078 free(buf); 1079 } 1080 1081 /* 1082 * xbasename -- 1083 * libc basename(3) that returns a pointer to a static buffer 1084 * instead of overwriting that passed-in string. 1085 */ 1086 char * 1087 xbasename(char *path) 1088 { 1089 static char tmp[MAXPATHLEN]; 1090 1091 (void)strlcpy(tmp, path, sizeof(tmp)); 1092 return (basename(tmp)); 1093 } 1094 1095 /* 1096 * xdirname -- 1097 * libc dirname(3) that returns a pointer to a static buffer 1098 * instead of overwriting that passed-in string. 1099 */ 1100 char * 1101 xdirname(char *path) 1102 { 1103 static char tmp[MAXPATHLEN]; 1104 1105 (void)strlcpy(tmp, path, sizeof(tmp)); 1106 return (dirname(tmp)); 1107 } 1108 1109 /* 1110 * usage -- 1111 * print a usage message and die 1112 */ 1113 void 1114 usage(void) 1115 { 1116 const char *prog; 1117 1118 prog = getprogname(); 1119 1120 (void)fprintf(stderr, 1121 "usage: %s [-Ubcprs] [-M log] [-D dest] [-T tags] [-B suffix]\n" 1122 " [-a aftercmd] [-f flags] [-m mode] [-N dbdir] [-o owner] [-g group] \n" 1123 " [-l linkflags] [-h hash] [-S stripflags] file1 file2\n" 1124 " %s [-Ubcprs] [-M log] [-D dest] [-T tags] [-B suffix]\n" 1125 " [-a aftercmd] [-f flags] [-m mode] [-N dbdir] [-o owner] [-g group]\n" 1126 " [-l linkflags] [-h hash] [-S stripflags] file1 ... fileN directory\n" 1127 " %s -d [-Up] [-M log] [-D dest] [-T tags] [-a aftercmd] [-m mode]\n" 1128 " [-N dbdir] [-o owner] [-g group] directory ...\n", 1129 prog, prog, prog); 1130 exit(1); 1131 } 1132
Indexes created Mon Sep 29 21:09:56 GMT 2025