1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2012, 2013 SRI International 5 * Copyright (c) 1987, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 static const char copyright[] = 35 "@(#) Copyright (c) 1987, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37 #endif /* not lint */ 38 39 #if 0 40 #ifndef lint 41 static char sccsid[] = "@(#)xinstall.c 8.1 (Berkeley) 7/21/93"; 42 #endif /* not lint */ 43 #endif 44 45 #include <sys/cdefs.h> 46 __FBSDID("$FreeBSD$"); 47 48 #include <sys/param.h> 49 #include <sys/mman.h> 50 #include <sys/mount.h> 51 #include <sys/stat.h> 52 #include <sys/time.h> 53 #include <sys/wait.h> 54 55 #include <err.h> 56 #include <errno.h> 57 #include <fcntl.h> 58 #include <grp.h> 59 #include <libgen.h> 60 #include <md5.h> 61 #include <paths.h> 62 #include <pwd.h> 63 #include <ripemd.h> 64 #include <sha.h> 65 #include <sha256.h> 66 #include <sha512.h> 67 #include <spawn.h> 68 #include <stdint.h> 69 #include <stdio.h> 70 #include <stdlib.h> 71 #include <string.h> 72 #include <sysexits.h> 73 #include <unistd.h> 74 #include <vis.h> 75 76 #include "mtree.h" 77 78 #define MAX_CMP_SIZE (16 * 1024 * 1024) 79 80 #define LN_ABSOLUTE 0x01 81 #define LN_RELATIVE 0x02 82 #define LN_HARD 0x04 83 #define LN_SYMBOLIC 0x08 84 #define LN_MIXED 0x10 85 86 #define DIRECTORY 0x01 /* Tell install it's a directory. */ 87 #define SETFLAGS 0x02 /* Tell install to set flags. */ 88 #define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND) 89 #define BACKUP_SUFFIX ".old" 90 91 typedef union { 92 MD5_CTX MD5; 93 RIPEMD160_CTX RIPEMD160; 94 SHA1_CTX SHA1; 95 SHA256_CTX SHA256; 96 SHA512_CTX SHA512; 97 } DIGEST_CTX; 98 99 static enum { 100 DIGEST_NONE = 0, 101 DIGEST_MD5, 102 DIGEST_RIPEMD160, 103 DIGEST_SHA1, 104 DIGEST_SHA256, 105 DIGEST_SHA512, 106 } digesttype = DIGEST_NONE; 107 108 extern char **environ; 109 110 static gid_t gid; 111 static uid_t uid; 112 static int dobackup, docompare, dodir, dolink, dopreserve, dostrip, dounpriv, 113 safecopy, verbose; 114 static int haveopt_f, haveopt_g, haveopt_m, haveopt_o; 115 static mode_t mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH; 116 static FILE *metafp; 117 static const char *group, *owner; 118 static const char *suffix = BACKUP_SUFFIX; 119 static char *destdir, *digest, *fflags, *metafile, *tags; 120 121 static int compare(int, const char *, size_t, int, const char *, size_t, 122 char **); 123 static char *copy(int, const char *, int, const char *, off_t); 124 static int create_newfile(const char *, int, struct stat *); 125 static int create_tempfile(const char *, char *, size_t); 126 static char *quiet_mktemp(char *template); 127 static char *digest_file(const char *); 128 static void digest_init(DIGEST_CTX *); 129 static void digest_update(DIGEST_CTX *, const char *, size_t); 130 static char *digest_end(DIGEST_CTX *, char *); 131 static int do_link(const char *, const char *, const struct stat *); 132 static void do_symlink(const char *, const char *, const struct stat *); 133 static void makelink(const char *, const char *, const struct stat *); 134 static void install(const char *, const char *, u_long, u_int); 135 static void install_dir(char *); 136 static void metadata_log(const char *, const char *, struct timespec *, 137 const char *, const char *, off_t); 138 static int parseid(const char *, id_t *); 139 static void strip(const char *); 140 static int trymmap(int); 141 static void usage(void); 142 143 int 144 main(int argc, char *argv[]) 145 { 146 struct stat from_sb, to_sb; 147 mode_t *set; 148 u_long fset; 149 int ch, no_target; 150 u_int iflags; 151 char *p; 152 const char *to_name; 153 154 fset = 0; 155 iflags = 0; 156 group = owner = NULL; 157 while ((ch = getopt(argc, argv, "B:bCcD:df:g:h:l:M:m:N:o:pSsT:Uv")) != 158 -1) 159 switch((char)ch) { 160 case 'B': 161 suffix = optarg; 162 /* FALLTHROUGH */ 163 case 'b': 164 dobackup = 1; 165 break; 166 case 'C': 167 docompare = 1; 168 break; 169 case 'c': 170 /* For backwards compatibility. */ 171 break; 172 case 'D': 173 destdir = optarg; 174 break; 175 case 'd': 176 dodir = 1; 177 break; 178 case 'f': 179 haveopt_f = 1; 180 fflags = optarg; 181 break; 182 case 'g': 183 haveopt_g = 1; 184 group = optarg; 185 break; 186 case 'h': 187 digest = optarg; 188 break; 189 case 'l': 190 for (p = optarg; *p != '\0'; p++) 191 switch (*p) { 192 case 's': 193 dolink &= ~(LN_HARD|LN_MIXED); 194 dolink |= LN_SYMBOLIC; 195 break; 196 case 'h': 197 dolink &= ~(LN_SYMBOLIC|LN_MIXED); 198 dolink |= LN_HARD; 199 break; 200 case 'm': 201 dolink &= ~(LN_SYMBOLIC|LN_HARD); 202 dolink |= LN_MIXED; 203 break; 204 case 'a': 205 dolink &= ~LN_RELATIVE; 206 dolink |= LN_ABSOLUTE; 207 break; 208 case 'r': 209 dolink &= ~LN_ABSOLUTE; 210 dolink |= LN_RELATIVE; 211 break; 212 default: 213 errx(1, "%c: invalid link type", *p); 214 /* NOTREACHED */ 215 } 216 break; 217 case 'M': 218 metafile = optarg; 219 break; 220 case 'm': 221 haveopt_m = 1; 222 if (!(set = setmode(optarg))) 223 errx(EX_USAGE, "invalid file mode: %s", 224 optarg); 225 mode = getmode(set, 0); 226 free(set); 227 break; 228 case 'N': 229 if (!setup_getid(optarg)) 230 err(EX_OSERR, "Unable to use user and group " 231 "databases in `%s'", optarg); 232 break; 233 case 'o': 234 haveopt_o = 1; 235 owner = optarg; 236 break; 237 case 'p': 238 docompare = dopreserve = 1; 239 break; 240 case 'S': 241 safecopy = 1; 242 break; 243 case 's': 244 dostrip = 1; 245 break; 246 case 'T': 247 tags = optarg; 248 break; 249 case 'U': 250 dounpriv = 1; 251 break; 252 case 'v': 253 verbose = 1; 254 break; 255 case '?': 256 default: 257 usage(); 258 } 259 argc -= optind; 260 argv += optind; 261 262 /* some options make no sense when creating directories */ 263 if (dostrip && dodir) { 264 warnx("-d and -s may not be specified together"); 265 usage(); 266 } 267 268 if (getenv("DONTSTRIP") != NULL) { 269 warnx("DONTSTRIP set - will not strip installed binaries"); 270 dostrip = 0; 271 } 272 273 /* must have at least two arguments, except when creating directories */ 274 if (argc == 0 || (argc == 1 && !dodir)) 275 usage(); 276 277 if (digest != NULL) { 278 if (strcmp(digest, "none") == 0) { 279 digesttype = DIGEST_NONE; 280 } else if (strcmp(digest, "md5") == 0) { 281 digesttype = DIGEST_MD5; 282 } else if (strcmp(digest, "rmd160") == 0) { 283 digesttype = DIGEST_RIPEMD160; 284 } else if (strcmp(digest, "sha1") == 0) { 285 digesttype = DIGEST_SHA1; 286 } else if (strcmp(digest, "sha256") == 0) { 287 digesttype = DIGEST_SHA256; 288 } else if (strcmp(digest, "sha512") == 0) { 289 digesttype = DIGEST_SHA512; 290 } else { 291 warnx("unknown digest `%s'", digest); 292 usage(); 293 } 294 } 295 296 /* need to make a temp copy so we can compare stripped version */ 297 if (docompare && dostrip) 298 safecopy = 1; 299 300 /* get group and owner id's */ 301 if (group != NULL && !dounpriv) { 302 if (gid_from_group(group, &gid) == -1) { 303 id_t id; 304 if (!parseid(group, &id)) 305 errx(1, "unknown group %s", group); 306 gid = id; 307 } 308 } else 309 gid = (gid_t)-1; 310 311 if (owner != NULL && !dounpriv) { 312 if (uid_from_user(owner, &uid) == -1) { 313 id_t id; 314 if (!parseid(owner, &id)) 315 errx(1, "unknown user %s", owner); 316 uid = id; 317 } 318 } else 319 uid = (uid_t)-1; 320 321 if (fflags != NULL && !dounpriv) { 322 if (strtofflags(&fflags, &fset, NULL)) 323 errx(EX_USAGE, "%s: invalid flag", fflags); 324 iflags |= SETFLAGS; 325 } 326 327 if (metafile != NULL) { 328 if ((metafp = fopen(metafile, "a")) == NULL) 329 warn("open %s", metafile); 330 } else 331 digesttype = DIGEST_NONE; 332 333 if (dodir) { 334 for (; *argv != NULL; ++argv) 335 install_dir(*argv); 336 exit(EX_OK); 337 /* NOTREACHED */ 338 } 339 340 to_name = argv[argc - 1]; 341 no_target = stat(to_name, &to_sb); 342 if (!no_target && S_ISDIR(to_sb.st_mode)) { 343 if (dolink & LN_SYMBOLIC) { 344 if (lstat(to_name, &to_sb) != 0) 345 err(EX_OSERR, "%s vanished", to_name); 346 if (S_ISLNK(to_sb.st_mode)) { 347 if (argc != 2) { 348 errno = ENOTDIR; 349 err(EX_USAGE, "%s", to_name); 350 } 351 install(*argv, to_name, fset, iflags); 352 exit(EX_OK); 353 } 354 } 355 for (; *argv != to_name; ++argv) 356 install(*argv, to_name, fset, iflags | DIRECTORY); 357 exit(EX_OK); 358 /* NOTREACHED */ 359 } 360 361 /* can't do file1 file2 directory/file */ 362 if (argc != 2) { 363 if (no_target) 364 warnx("target directory `%s' does not exist", 365 argv[argc - 1]); 366 else 367 warnx("target `%s' is not a directory", 368 argv[argc - 1]); 369 usage(); 370 } 371 372 if (!no_target && !dolink) { 373 if (stat(*argv, &from_sb)) 374 err(EX_OSERR, "%s", *argv); 375 if (!S_ISREG(to_sb.st_mode)) { 376 errno = EFTYPE; 377 err(EX_OSERR, "%s", to_name); 378 } 379 if (to_sb.st_dev == from_sb.st_dev && 380 to_sb.st_ino == from_sb.st_ino) 381 errx(EX_USAGE, 382 "%s and %s are the same file", *argv, to_name); 383 } 384 install(*argv, to_name, fset, iflags); 385 exit(EX_OK); 386 /* NOTREACHED */ 387 } 388 389 static char * 390 digest_file(const char *name) 391 { 392 393 switch (digesttype) { 394 case DIGEST_MD5: 395 return (MD5File(name, NULL)); 396 case DIGEST_RIPEMD160: 397 return (RIPEMD160_File(name, NULL)); 398 case DIGEST_SHA1: 399 return (SHA1_File(name, NULL)); 400 case DIGEST_SHA256: 401 return (SHA256_File(name, NULL)); 402 case DIGEST_SHA512: 403 return (SHA512_File(name, NULL)); 404 default: 405 return (NULL); 406 } 407 } 408 409 static void 410 digest_init(DIGEST_CTX *c) 411 { 412 413 switch (digesttype) { 414 case DIGEST_NONE: 415 break; 416 case DIGEST_MD5: 417 MD5Init(&(c->MD5)); 418 break; 419 case DIGEST_RIPEMD160: 420 RIPEMD160_Init(&(c->RIPEMD160)); 421 break; 422 case DIGEST_SHA1: 423 SHA1_Init(&(c->SHA1)); 424 break; 425 case DIGEST_SHA256: 426 SHA256_Init(&(c->SHA256)); 427 break; 428 case DIGEST_SHA512: 429 SHA512_Init(&(c->SHA512)); 430 break; 431 } 432 } 433 434 static void 435 digest_update(DIGEST_CTX *c, const char *data, size_t len) 436 { 437 438 switch (digesttype) { 439 case DIGEST_NONE: 440 break; 441 case DIGEST_MD5: 442 MD5Update(&(c->MD5), data, len); 443 break; 444 case DIGEST_RIPEMD160: 445 RIPEMD160_Update(&(c->RIPEMD160), data, len); 446 break; 447 case DIGEST_SHA1: 448 SHA1_Update(&(c->SHA1), data, len); 449 break; 450 case DIGEST_SHA256: 451 SHA256_Update(&(c->SHA256), data, len); 452 break; 453 case DIGEST_SHA512: 454 SHA512_Update(&(c->SHA512), data, len); 455 break; 456 } 457 } 458 459 static char * 460 digest_end(DIGEST_CTX *c, char *buf) 461 { 462 463 switch (digesttype) { 464 case DIGEST_MD5: 465 return (MD5End(&(c->MD5), buf)); 466 case DIGEST_RIPEMD160: 467 return (RIPEMD160_End(&(c->RIPEMD160), buf)); 468 case DIGEST_SHA1: 469 return (SHA1_End(&(c->SHA1), buf)); 470 case DIGEST_SHA256: 471 return (SHA256_End(&(c->SHA256), buf)); 472 case DIGEST_SHA512: 473 return (SHA512_End(&(c->SHA512), buf)); 474 default: 475 return (NULL); 476 } 477 } 478 479 /* 480 * parseid -- 481 * parse uid or gid from arg into id, returning non-zero if successful 482 */ 483 static int 484 parseid(const char *name, id_t *id) 485 { 486 char *ep; 487 errno = 0; 488 *id = (id_t)strtoul(name, &ep, 10); 489 if (errno || *ep != '\0') 490 return (0); 491 return (1); 492 } 493 494 /* 495 * quiet_mktemp -- 496 * mktemp implementation used mkstemp to avoid mktemp warnings. We 497 * really do need mktemp semantics here as we will be creating a link. 498 */ 499 static char * 500 quiet_mktemp(char *template) 501 { 502 int fd; 503 504 if ((fd = mkstemp(template)) == -1) 505 return (NULL); 506 close (fd); 507 if (unlink(template) == -1) 508 err(EX_OSERR, "unlink %s", template); 509 return (template); 510 } 511 512 /* 513 * do_link -- 514 * make a hard link, obeying dorename if set 515 * return -1 on failure 516 */ 517 static int 518 do_link(const char *from_name, const char *to_name, 519 const struct stat *target_sb) 520 { 521 char tmpl[MAXPATHLEN]; 522 int ret; 523 524 if (safecopy && target_sb != NULL) { 525 (void)snprintf(tmpl, sizeof(tmpl), "%s.inst.XXXXXX", to_name); 526 /* This usage is safe. */ 527 if (quiet_mktemp(tmpl) == NULL) 528 err(EX_OSERR, "%s: mktemp", tmpl); 529 ret = link(from_name, tmpl); 530 if (ret == 0) { 531 if (target_sb->st_mode & S_IFDIR && rmdir(to_name) == 532 -1) { 533 unlink(tmpl); 534 err(EX_OSERR, "%s", to_name); 535 } 536 if (target_sb->st_flags & NOCHANGEBITS) 537 (void)chflags(to_name, target_sb->st_flags & 538 ~NOCHANGEBITS); 539 if (verbose) 540 printf("install: link %s -> %s\n", 541 from_name, to_name); 542 ret = rename(tmpl, to_name); 543 /* 544 * If rename has posix semantics, then the temporary 545 * file may still exist when from_name and to_name point 546 * to the same file, so unlink it unconditionally. 547 */ 548 (void)unlink(tmpl); 549 } 550 return (ret); 551 } else { 552 if (verbose) 553 printf("install: link %s -> %s\n", 554 from_name, to_name); 555 return (link(from_name, to_name)); 556 } 557 } 558 559 /* 560 * do_symlink -- 561 * Make a symbolic link, obeying dorename if set. Exit on failure. 562 */ 563 static void 564 do_symlink(const char *from_name, const char *to_name, 565 const struct stat *target_sb) 566 { 567 char tmpl[MAXPATHLEN]; 568 569 if (safecopy && target_sb != NULL) { 570 (void)snprintf(tmpl, sizeof(tmpl), "%s.inst.XXXXXX", to_name); 571 /* This usage is safe. */ 572 if (quiet_mktemp(tmpl) == NULL) 573 err(EX_OSERR, "%s: mktemp", tmpl); 574 575 if (symlink(from_name, tmpl) == -1) 576 err(EX_OSERR, "symlink %s -> %s", from_name, tmpl); 577 578 if (target_sb->st_mode & S_IFDIR && rmdir(to_name) == -1) { 579 (void)unlink(tmpl); 580 err(EX_OSERR, "%s", to_name); 581 } 582 if (target_sb->st_flags & NOCHANGEBITS) 583 (void)chflags(to_name, target_sb->st_flags & 584 ~NOCHANGEBITS); 585 if (verbose) 586 printf("install: symlink %s -> %s\n", 587 from_name, to_name); 588 if (rename(tmpl, to_name) == -1) { 589 /* Remove temporary link before exiting. */ 590 (void)unlink(tmpl); 591 err(EX_OSERR, "%s: rename", to_name); 592 } 593 } else { 594 if (verbose) 595 printf("install: symlink %s -> %s\n", 596 from_name, to_name); 597 if (symlink(from_name, to_name) == -1) 598 err(EX_OSERR, "symlink %s -> %s", from_name, to_name); 599 } 600 } 601 602 /* 603 * makelink -- 604 * make a link from source to destination 605 */ 606 static void 607 makelink(const char *from_name, const char *to_name, 608 const struct stat *target_sb) 609 { 610 char src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN]; 611 struct stat to_sb; 612 613 /* Try hard links first. */ 614 if (dolink & (LN_HARD|LN_MIXED)) { 615 if (do_link(from_name, to_name, target_sb) == -1) { 616 if ((dolink & LN_HARD) || errno != EXDEV) 617 err(EX_OSERR, "link %s -> %s", from_name, to_name); 618 } else { 619 if (stat(to_name, &to_sb)) 620 err(EX_OSERR, "%s: stat", to_name); 621 if (S_ISREG(to_sb.st_mode)) { 622 /* 623 * XXX: hard links to anything other than 624 * plain files are not metalogged 625 */ 626 int omode; 627 const char *oowner, *ogroup; 628 char *offlags; 629 char *dres; 630 631 /* 632 * XXX: use underlying perms, unless 633 * overridden on command line. 634 */ 635 omode = mode; 636 if (!haveopt_m) 637 mode = (to_sb.st_mode & 0777); 638 oowner = owner; 639 if (!haveopt_o) 640 owner = NULL; 641 ogroup = group; 642 if (!haveopt_g) 643 group = NULL; 644 offlags = fflags; 645 if (!haveopt_f) 646 fflags = NULL; 647 dres = digest_file(from_name); 648 metadata_log(to_name, "file", NULL, NULL, 649 dres, to_sb.st_size); 650 free(dres); 651 mode = omode; 652 owner = oowner; 653 group = ogroup; 654 fflags = offlags; 655 } 656 return; 657 } 658 } 659 660 /* Symbolic links. */ 661 if (dolink & LN_ABSOLUTE) { 662 /* Convert source path to absolute. */ 663 if (realpath(from_name, src) == NULL) 664 err(EX_OSERR, "%s: realpath", from_name); 665 do_symlink(src, to_name, target_sb); 666 /* XXX: src may point outside of destdir */ 667 metadata_log(to_name, "link", NULL, src, NULL, 0); 668 return; 669 } 670 671 if (dolink & LN_RELATIVE) { 672 char *to_name_copy, *cp, *d, *s; 673 674 if (*from_name != '/') { 675 /* this is already a relative link */ 676 do_symlink(from_name, to_name, target_sb); 677 /* XXX: from_name may point outside of destdir. */ 678 metadata_log(to_name, "link", NULL, from_name, NULL, 0); 679 return; 680 } 681 682 /* Resolve pathnames. */ 683 if (realpath(from_name, src) == NULL) 684 err(EX_OSERR, "%s: realpath", from_name); 685 686 /* 687 * The last component of to_name may be a symlink, 688 * so use realpath to resolve only the directory. 689 */ 690 to_name_copy = strdup(to_name); 691 if (to_name_copy == NULL) 692 err(EX_OSERR, "%s: strdup", to_name); 693 cp = dirname(to_name_copy); 694 if (realpath(cp, dst) == NULL) 695 err(EX_OSERR, "%s: realpath", cp); 696 /* .. and add the last component. */ 697 if (strcmp(dst, "/") != 0) { 698 if (strlcat(dst, "/", sizeof(dst)) > sizeof(dst)) 699 errx(1, "resolved pathname too long"); 700 } 701 strcpy(to_name_copy, to_name); 702 cp = basename(to_name_copy); 703 if (strlcat(dst, cp, sizeof(dst)) > sizeof(dst)) 704 errx(1, "resolved pathname too long"); 705 free(to_name_copy); 706 707 /* Trim common path components. */ 708 for (s = src, d = dst; *s == *d; s++, d++) 709 continue; 710 while (*s != '/') 711 s--, d--; 712 713 /* Count the number of directories we need to backtrack. */ 714 for (++d, lnk[0] = '\0'; *d; d++) 715 if (*d == '/') 716 (void)strlcat(lnk, "../", sizeof(lnk)); 717 718 (void)strlcat(lnk, ++s, sizeof(lnk)); 719 720 do_symlink(lnk, to_name, target_sb); 721 /* XXX: Link may point outside of destdir. */ 722 metadata_log(to_name, "link", NULL, lnk, NULL, 0); 723 return; 724 } 725 726 /* 727 * If absolute or relative was not specified, try the names the 728 * user provided. 729 */ 730 do_symlink(from_name, to_name, target_sb); 731 /* XXX: from_name may point outside of destdir. */ 732 metadata_log(to_name, "link", NULL, from_name, NULL, 0); 733 } 734 735 /* 736 * install -- 737 * build a path name and install the file 738 */ 739 static void 740 install(const char *from_name, const char *to_name, u_long fset, u_int flags) 741 { 742 struct stat from_sb, temp_sb, to_sb; 743 struct timespec tsb[2]; 744 int devnull, files_match, from_fd, serrno, target; 745 int tempcopy, temp_fd, to_fd; 746 char backup[MAXPATHLEN], *p, pathbuf[MAXPATHLEN], tempfile[MAXPATHLEN]; 747 char *digestresult; 748 749 files_match = 0; 750 from_fd = -1; 751 to_fd = -1; 752 753 /* If try to install NULL file to a directory, fails. */ 754 if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) { 755 if (!dolink) { 756 if (stat(from_name, &from_sb)) 757 err(EX_OSERR, "%s", from_name); 758 if (!S_ISREG(from_sb.st_mode)) { 759 errno = EFTYPE; 760 err(EX_OSERR, "%s", from_name); 761 } 762 } 763 /* Build the target path. */ 764 if (flags & DIRECTORY) { 765 (void)snprintf(pathbuf, sizeof(pathbuf), "%s%s%s", 766 to_name, 767 to_name[strlen(to_name) - 1] == '/' ? "" : "/", 768 (p = strrchr(from_name, '/')) ? ++p : from_name); 769 to_name = pathbuf; 770 } 771 devnull = 0; 772 } else { 773 devnull = 1; 774 } 775 776 target = (lstat(to_name, &to_sb) == 0); 777 778 if (dolink) { 779 if (target && !safecopy) { 780 if (to_sb.st_mode & S_IFDIR && rmdir(to_name) == -1) 781 err(EX_OSERR, "%s", to_name); 782 if (to_sb.st_flags & NOCHANGEBITS) 783 (void)chflags(to_name, 784 to_sb.st_flags & ~NOCHANGEBITS); 785 unlink(to_name); 786 } 787 makelink(from_name, to_name, target ? &to_sb : NULL); 788 return; 789 } 790 791 if (target && !S_ISREG(to_sb.st_mode) && !S_ISLNK(to_sb.st_mode)) { 792 errno = EFTYPE; 793 warn("%s", to_name); 794 return; 795 } 796 797 /* Only copy safe if the target exists. */ 798 tempcopy = safecopy && target; 799 800 if (!devnull && (from_fd = open(from_name, O_RDONLY, 0)) < 0) 801 err(EX_OSERR, "%s", from_name); 802 803 /* If we don't strip, we can compare first. */ 804 if (docompare && !dostrip && target && S_ISREG(to_sb.st_mode)) { 805 if ((to_fd = open(to_name, O_RDONLY, 0)) < 0) 806 err(EX_OSERR, "%s", to_name); 807 if (devnull) 808 files_match = to_sb.st_size == 0; 809 else 810 files_match = !(compare(from_fd, from_name, 811 (size_t)from_sb.st_size, to_fd, 812 to_name, (size_t)to_sb.st_size, &digestresult)); 813 814 /* Close "to" file unless we match. */ 815 if (!files_match) 816 (void)close(to_fd); 817 } 818 819 if (!files_match) { 820 if (tempcopy) { 821 to_fd = create_tempfile(to_name, tempfile, 822 sizeof(tempfile)); 823 if (to_fd < 0) 824 err(EX_OSERR, "%s", tempfile); 825 } else { 826 if ((to_fd = create_newfile(to_name, target, 827 &to_sb)) < 0) 828 err(EX_OSERR, "%s", to_name); 829 if (verbose) 830 (void)printf("install: %s -> %s\n", 831 from_name, to_name); 832 } 833 if (!devnull) 834 digestresult = copy(from_fd, from_name, to_fd, 835 tempcopy ? tempfile : to_name, from_sb.st_size); 836 else 837 digestresult = NULL; 838 } 839 840 if (dostrip) { 841 strip(tempcopy ? tempfile : to_name); 842 843 /* 844 * Re-open our fd on the target, in case we used a strip 845 * that does not work in-place -- like GNU binutils strip. 846 */ 847 close(to_fd); 848 to_fd = open(tempcopy ? tempfile : to_name, O_RDONLY, 0); 849 if (to_fd < 0) 850 err(EX_OSERR, "stripping %s", to_name); 851 } 852 853 /* 854 * Compare the stripped temp file with the target. 855 */ 856 if (docompare && dostrip && target && S_ISREG(to_sb.st_mode)) { 857 temp_fd = to_fd; 858 859 /* Re-open to_fd using the real target name. */ 860 if ((to_fd = open(to_name, O_RDONLY, 0)) < 0) 861 err(EX_OSERR, "%s", to_name); 862 863 if (fstat(temp_fd, &temp_sb)) { 864 serrno = errno; 865 (void)unlink(tempfile); 866 errno = serrno; 867 err(EX_OSERR, "%s", tempfile); 868 } 869 870 if (compare(temp_fd, tempfile, (size_t)temp_sb.st_size, to_fd, 871 to_name, (size_t)to_sb.st_size, &digestresult) 872 == 0) { 873 /* 874 * If target has more than one link we need to 875 * replace it in order to snap the extra links. 876 * Need to preserve target file times, though. 877 */ 878 if (to_sb.st_nlink != 1) { 879 tsb[0] = to_sb.st_atim; 880 tsb[1] = to_sb.st_mtim; 881 (void)utimensat(AT_FDCWD, tempfile, tsb, 0); 882 } else { 883 files_match = 1; 884 (void)unlink(tempfile); 885 } 886 (void) close(temp_fd); 887 } 888 } else if (dostrip) 889 digestresult = digest_file(tempfile); 890 891 /* 892 * Move the new file into place if doing a safe copy 893 * and the files are different (or just not compared). 894 */ 895 if (tempcopy && !files_match) { 896 /* Try to turn off the immutable bits. */ 897 if (to_sb.st_flags & NOCHANGEBITS) 898 (void)chflags(to_name, to_sb.st_flags & ~NOCHANGEBITS); 899 if (dobackup) { 900 if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s", to_name, 901 suffix) != strlen(to_name) + strlen(suffix)) { 902 unlink(tempfile); 903 errx(EX_OSERR, "%s: backup filename too long", 904 to_name); 905 } 906 if (verbose) 907 (void)printf("install: %s -> %s\n", to_name, backup); 908 if (unlink(backup) < 0 && errno != ENOENT) { 909 serrno = errno; 910 if (to_sb.st_flags & NOCHANGEBITS) 911 (void)chflags(to_name, to_sb.st_flags); 912 unlink(tempfile); 913 errno = serrno; 914 err(EX_OSERR, "unlink: %s", backup); 915 } 916 if (link(to_name, backup) < 0) { 917 serrno = errno; 918 unlink(tempfile); 919 if (to_sb.st_flags & NOCHANGEBITS) 920 (void)chflags(to_name, to_sb.st_flags); 921 errno = serrno; 922 err(EX_OSERR, "link: %s to %s", to_name, 923 backup); 924 } 925 } 926 if (verbose) 927 (void)printf("install: %s -> %s\n", from_name, to_name); 928 if (rename(tempfile, to_name) < 0) { 929 serrno = errno; 930 unlink(tempfile); 931 errno = serrno; 932 err(EX_OSERR, "rename: %s to %s", 933 tempfile, to_name); 934 } 935 936 /* Re-open to_fd so we aren't hosed by the rename(2). */ 937 (void) close(to_fd); 938 if ((to_fd = open(to_name, O_RDONLY, 0)) < 0) 939 err(EX_OSERR, "%s", to_name); 940 } 941 942 /* 943 * Preserve the timestamp of the source file if necessary. 944 */ 945 if (dopreserve && !files_match && !devnull) { 946 tsb[0] = from_sb.st_atim; 947 tsb[1] = from_sb.st_mtim; 948 (void)utimensat(AT_FDCWD, to_name, tsb, 0); 949 } 950 951 if (fstat(to_fd, &to_sb) == -1) { 952 serrno = errno; 953 (void)unlink(to_name); 954 errno = serrno; 955 err(EX_OSERR, "%s", to_name); 956 } 957 958 /* 959 * Set owner, group, mode for target; do the chown first, 960 * chown may lose the setuid bits. 961 */ 962 if (!dounpriv && ((gid != (gid_t)-1 && gid != to_sb.st_gid) || 963 (uid != (uid_t)-1 && uid != to_sb.st_uid) || 964 (mode != (to_sb.st_mode & ALLPERMS)))) { 965 /* Try to turn off the immutable bits. */ 966 if (to_sb.st_flags & NOCHANGEBITS) 967 (void)fchflags(to_fd, to_sb.st_flags & ~NOCHANGEBITS); 968 } 969 970 if (!dounpriv & 971 (gid != (gid_t)-1 && gid != to_sb.st_gid) || 972 (uid != (uid_t)-1 && uid != to_sb.st_uid)) 973 if (fchown(to_fd, uid, gid) == -1) { 974 serrno = errno; 975 (void)unlink(to_name); 976 errno = serrno; 977 err(EX_OSERR,"%s: chown/chgrp", to_name); 978 } 979 980 if (mode != (to_sb.st_mode & ALLPERMS)) { 981 if (fchmod(to_fd, 982 dounpriv ? mode & (S_IRWXU|S_IRWXG|S_IRWXO) : mode)) { 983 serrno = errno; 984 (void)unlink(to_name); 985 errno = serrno; 986 err(EX_OSERR, "%s: chmod", to_name); 987 } 988 } 989 990 /* 991 * If provided a set of flags, set them, otherwise, preserve the 992 * flags, except for the dump flag. 993 * NFS does not support flags. Ignore EOPNOTSUPP flags if we're just 994 * trying to turn off UF_NODUMP. If we're trying to set real flags, 995 * then warn if the fs doesn't support it, otherwise fail. 996 */ 997 if (!dounpriv & !devnull && (flags & SETFLAGS || 998 (from_sb.st_flags & ~UF_NODUMP) != to_sb.st_flags) && 999 fchflags(to_fd, 1000 flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) { 1001 if (flags & SETFLAGS) { 1002 if (errno == EOPNOTSUPP) 1003 warn("%s: chflags", to_name); 1004 else { 1005 serrno = errno; 1006 (void)unlink(to_name); 1007 errno = serrno; 1008 err(EX_OSERR, "%s: chflags", to_name); 1009 } 1010 } 1011 } 1012 1013 (void)close(to_fd); 1014 if (!devnull) 1015 (void)close(from_fd); 1016 1017 metadata_log(to_name, "file", tsb, NULL, digestresult, to_sb.st_size); 1018 free(digestresult); 1019 } 1020 1021 /* 1022 * compare -- 1023 * compare two files; non-zero means files differ 1024 */ 1025 static int 1026 compare(int from_fd, const char *from_name __unused, size_t from_len, 1027 int to_fd, const char *to_name __unused, size_t to_len, 1028 char **dresp) 1029 { 1030 char *p, *q; 1031 int rv; 1032 int done_compare; 1033 DIGEST_CTX ctx; 1034 1035 rv = 0; 1036 if (from_len != to_len) 1037 return 1; 1038 1039 if (from_len <= MAX_CMP_SIZE) { 1040 if (dresp != NULL) 1041 digest_init(&ctx); 1042 done_compare = 0; 1043 if (trymmap(from_fd) && trymmap(to_fd)) { 1044 p = mmap(NULL, from_len, PROT_READ, MAP_SHARED, 1045 from_fd, (off_t)0); 1046 if (p == MAP_FAILED) 1047 goto out; 1048 q = mmap(NULL, from_len, PROT_READ, MAP_SHARED, 1049 to_fd, (off_t)0); 1050 if (q == MAP_FAILED) { 1051 munmap(p, from_len); 1052 goto out; 1053 } 1054 1055 rv = memcmp(p, q, from_len); 1056 if (dresp != NULL) 1057 digest_update(&ctx, p, from_len); 1058 munmap(p, from_len); 1059 munmap(q, from_len); 1060 done_compare = 1; 1061 } 1062 out: 1063 if (!done_compare) { 1064 char buf1[MAXBSIZE]; 1065 char buf2[MAXBSIZE]; 1066 int n1, n2; 1067 1068 rv = 0; 1069 lseek(from_fd, 0, SEEK_SET); 1070 lseek(to_fd, 0, SEEK_SET); 1071 while (rv == 0) { 1072 n1 = read(from_fd, buf1, sizeof(buf1)); 1073 if (n1 == 0) 1074 break; /* EOF */ 1075 else if (n1 > 0) { 1076 n2 = read(to_fd, buf2, n1); 1077 if (n2 == n1) 1078 rv = memcmp(buf1, buf2, n1); 1079 else 1080 rv = 1; /* out of sync */ 1081 } else 1082 rv = 1; /* read failure */ 1083 digest_update(&ctx, buf1, n1); 1084 } 1085 lseek(from_fd, 0, SEEK_SET); 1086 lseek(to_fd, 0, SEEK_SET); 1087 } 1088 } else 1089 rv = 1; /* don't bother in this case */ 1090 1091 if (dresp != NULL) { 1092 if (rv == 0) 1093 *dresp = digest_end(&ctx, NULL); 1094 else 1095 (void)digest_end(&ctx, NULL); 1096 } 1097 1098 return rv; 1099 } 1100 1101 /* 1102 * create_tempfile -- 1103 * create a temporary file based on path and open it 1104 */ 1105 static int 1106 create_tempfile(const char *path, char *temp, size_t tsize) 1107 { 1108 char *p; 1109 1110 (void)strncpy(temp, path, tsize); 1111 temp[tsize - 1] = '\0'; 1112 if ((p = strrchr(temp, '/')) != NULL) 1113 p++; 1114 else 1115 p = temp; 1116 (void)strncpy(p, "INS@XXXX", &temp[tsize - 1] - p); 1117 temp[tsize - 1] = '\0'; 1118 return (mkstemp(temp)); 1119 } 1120 1121 /* 1122 * create_newfile -- 1123 * create a new file, overwriting an existing one if necessary 1124 */ 1125 static int 1126 create_newfile(const char *path, int target, struct stat *sbp) 1127 { 1128 char backup[MAXPATHLEN]; 1129 int saved_errno = 0; 1130 int newfd; 1131 1132 if (target) { 1133 /* 1134 * Unlink now... avoid ETXTBSY errors later. Try to turn 1135 * off the append/immutable bits -- if we fail, go ahead, 1136 * it might work. 1137 */ 1138 if (sbp->st_flags & NOCHANGEBITS) 1139 (void)chflags(path, sbp->st_flags & ~NOCHANGEBITS); 1140 1141 if (dobackup) { 1142 if ((size_t)snprintf(backup, MAXPATHLEN, "%s%s", 1143 path, suffix) != strlen(path) + strlen(suffix)) { 1144 saved_errno = errno; 1145 if (sbp->st_flags & NOCHANGEBITS) 1146 (void)chflags(path, sbp->st_flags); 1147 errno = saved_errno; 1148 errx(EX_OSERR, "%s: backup filename too long", 1149 path); 1150 } 1151 (void)snprintf(backup, MAXPATHLEN, "%s%s", 1152 path, suffix); 1153 if (verbose) 1154 (void)printf("install: %s -> %s\n", 1155 path, backup); 1156 if (rename(path, backup) < 0) { 1157 saved_errno = errno; 1158 if (sbp->st_flags & NOCHANGEBITS) 1159 (void)chflags(path, sbp->st_flags); 1160 errno = saved_errno; 1161 err(EX_OSERR, "rename: %s to %s", path, backup); 1162 } 1163 } else 1164 if (unlink(path) < 0) 1165 saved_errno = errno; 1166 } 1167 1168 newfd = open(path, O_CREAT | O_RDWR | O_TRUNC, S_IRUSR | S_IWUSR); 1169 if (newfd < 0 && saved_errno != 0) 1170 errno = saved_errno; 1171 return newfd; 1172 } 1173 1174 /* 1175 * copy -- 1176 * copy from one file to another 1177 */ 1178 static char * 1179 copy(int from_fd, const char *from_name, int to_fd, const char *to_name, 1180 off_t size) 1181 { 1182 int nr, nw; 1183 int serrno; 1184 char *p; 1185 char buf[MAXBSIZE]; 1186 int done_copy; 1187 DIGEST_CTX ctx; 1188 1189 /* Rewind file descriptors. */ 1190 if (lseek(from_fd, (off_t)0, SEEK_SET) == (off_t)-1) 1191 err(EX_OSERR, "lseek: %s", from_name); 1192 if (lseek(to_fd, (off_t)0, SEEK_SET) == (off_t)-1) 1193 err(EX_OSERR, "lseek: %s", to_name); 1194 1195 digest_init(&ctx); 1196 1197 /* 1198 * Mmap and write if less than 8M (the limit is so we don't totally 1199 * trash memory on big files. This is really a minor hack, but it 1200 * wins some CPU back. 1201 */ 1202 done_copy = 0; 1203 if (size <= 8 * 1048576 && trymmap(from_fd) && 1204 (p = mmap(NULL, (size_t)size, PROT_READ, MAP_SHARED, 1205 from_fd, (off_t)0)) != MAP_FAILED) { 1206 nw = write(to_fd, p, size); 1207 if (nw != size) { 1208 serrno = errno; 1209 (void)unlink(to_name); 1210 if (nw >= 0) { 1211 errx(EX_OSERR, 1212 "short write to %s: %jd bytes written, %jd bytes asked to write", 1213 to_name, (uintmax_t)nw, (uintmax_t)size); 1214 } else { 1215 errno = serrno; 1216 err(EX_OSERR, "%s", to_name); 1217 } 1218 } 1219 digest_update(&ctx, p, size); 1220 (void)munmap(p, size); 1221 done_copy = 1; 1222 } 1223 if (!done_copy) { 1224 while ((nr = read(from_fd, buf, sizeof(buf))) > 0) { 1225 if ((nw = write(to_fd, buf, nr)) != nr) { 1226 serrno = errno; 1227 (void)unlink(to_name); 1228 if (nw >= 0) { 1229 errx(EX_OSERR, 1230 "short write to %s: %jd bytes written, %jd bytes asked to write", 1231 to_name, (uintmax_t)nw, 1232 (uintmax_t)size); 1233 } else { 1234 errno = serrno; 1235 err(EX_OSERR, "%s", to_name); 1236 } 1237 } 1238 digest_update(&ctx, buf, nr); 1239 } 1240 if (nr != 0) { 1241 serrno = errno; 1242 (void)unlink(to_name); 1243 errno = serrno; 1244 err(EX_OSERR, "%s", from_name); 1245 } 1246 } 1247 return (digest_end(&ctx, NULL)); 1248 } 1249 1250 /* 1251 * strip -- 1252 * use strip(1) to strip the target file 1253 */ 1254 static void 1255 strip(const char *to_name) 1256 { 1257 const char *stripbin; 1258 const char *args[3]; 1259 pid_t pid; 1260 int error, status; 1261 1262 stripbin = getenv("STRIPBIN"); 1263 if (stripbin == NULL) 1264 stripbin = "strip"; 1265 args[0] = stripbin; 1266 args[1] = to_name; 1267 args[2] = NULL; 1268 error = posix_spawnp(&pid, stripbin, NULL, NULL, 1269 __DECONST(char **, args), environ); 1270 if (error != 0) { 1271 (void)unlink(to_name); 1272 errc(error == EAGAIN || error == EPROCLIM || error == ENOMEM ? 1273 EX_TEMPFAIL : EX_OSERR, error, "spawn %s", stripbin); 1274 } 1275 if (waitpid(pid, &status, 0) == -1) { 1276 error = errno; 1277 (void)unlink(to_name); 1278 errc(EX_SOFTWARE, error, "wait"); 1279 /* NOTREACHED */ 1280 } 1281 if (status != 0) { 1282 (void)unlink(to_name); 1283 errx(EX_SOFTWARE, "strip command %s failed on %s", 1284 stripbin, to_name); 1285 } 1286 } 1287 1288 /* 1289 * install_dir -- 1290 * build directory hierarchy 1291 */ 1292 static void 1293 install_dir(char *path) 1294 { 1295 char *p; 1296 struct stat sb; 1297 int ch, tried_mkdir; 1298 1299 for (p = path;; ++p) 1300 if (!*p || (p != path && *p == '/')) { 1301 tried_mkdir = 0; 1302 ch = *p; 1303 *p = '\0'; 1304 again: 1305 if (stat(path, &sb) < 0) { 1306 if (errno != ENOENT || tried_mkdir) 1307 err(EX_OSERR, "stat %s", path); 1308 if (mkdir(path, 0755) < 0) { 1309 tried_mkdir = 1; 1310 if (errno == EEXIST) 1311 goto again; 1312 err(EX_OSERR, "mkdir %s", path); 1313 } 1314 if (verbose) 1315 (void)printf("install: mkdir %s\n", 1316 path); 1317 } else if (!S_ISDIR(sb.st_mode)) 1318 errx(EX_OSERR, "%s exists but is not a directory", path); 1319 if (!(*p = ch)) 1320 break; 1321 } 1322 1323 if (!dounpriv) { 1324 if ((gid != (gid_t)-1 || uid != (uid_t)-1) && 1325 chown(path, uid, gid)) 1326 warn("chown %u:%u %s", uid, gid, path); 1327 /* XXXBED: should we do the chmod in the dounpriv case? */ 1328 if (chmod(path, mode)) 1329 warn("chmod %o %s", mode, path); 1330 } 1331 metadata_log(path, "dir", NULL, NULL, NULL, 0); 1332 } 1333 1334 /* 1335 * metadata_log -- 1336 * if metafp is not NULL, output mtree(8) full path name and settings to 1337 * metafp, to allow permissions to be set correctly by other tools, 1338 * or to allow integrity checks to be performed. 1339 */ 1340 static void 1341 metadata_log(const char *path, const char *type, struct timespec *ts, 1342 const char *slink, const char *digestresult, off_t size) 1343 { 1344 static const char extra[] = { ' ', '\t', '\n', '\\', '#', '\0' }; 1345 const char *p; 1346 char *buf; 1347 size_t destlen; 1348 struct flock metalog_lock; 1349 1350 if (!metafp) 1351 return; 1352 /* Buffer for strsvis(3). */ 1353 buf = (char *)malloc(4 * strlen(path) + 1); 1354 if (buf == NULL) { 1355 warnx("%s", strerror(ENOMEM)); 1356 return; 1357 } 1358 1359 /* Lock log file. */ 1360 metalog_lock.l_start = 0; 1361 metalog_lock.l_len = 0; 1362 metalog_lock.l_whence = SEEK_SET; 1363 metalog_lock.l_type = F_WRLCK; 1364 if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) { 1365 warn("can't lock %s", metafile); 1366 free(buf); 1367 return; 1368 } 1369 1370 /* Remove destdir. */ 1371 p = path; 1372 if (destdir) { 1373 destlen = strlen(destdir); 1374 if (strncmp(p, destdir, destlen) == 0 && 1375 (p[destlen] == '/' || p[destlen] == '\0')) 1376 p += destlen; 1377 } 1378 while (*p && *p == '/') 1379 p++; 1380 strsvis(buf, p, VIS_OCTAL, extra); 1381 p = buf; 1382 /* Print details. */ 1383 fprintf(metafp, ".%s%s type=%s", *p ? "/" : "", p, type); 1384 if (owner) 1385 fprintf(metafp, " uname=%s", owner); 1386 if (group) 1387 fprintf(metafp, " gname=%s", group); 1388 fprintf(metafp, " mode=%#o", mode); 1389 if (slink) { 1390 strsvis(buf, slink, VIS_CSTYLE, extra); /* encode link */ 1391 fprintf(metafp, " link=%s", buf); 1392 } 1393 if (*type == 'f') /* type=file */ 1394 fprintf(metafp, " size=%lld", (long long)size); 1395 if (ts != NULL && dopreserve) 1396 fprintf(metafp, " time=%lld.%09ld", 1397 (long long)ts[1].tv_sec, ts[1].tv_nsec); 1398 if (digestresult && digest) 1399 fprintf(metafp, " %s=%s", digest, digestresult); 1400 if (fflags) 1401 fprintf(metafp, " flags=%s", fflags); 1402 if (tags) 1403 fprintf(metafp, " tags=%s", tags); 1404 fputc('\n', metafp); 1405 /* Flush line. */ 1406 fflush(metafp); 1407 1408 /* Unlock log file. */ 1409 metalog_lock.l_type = F_UNLCK; 1410 if (fcntl(fileno(metafp), F_SETLKW, &metalog_lock) == -1) 1411 warn("can't unlock %s", metafile); 1412 free(buf); 1413 } 1414 1415 /* 1416 * usage -- 1417 * print a usage message and die 1418 */ 1419 static void 1420 usage(void) 1421 { 1422 (void)fprintf(stderr, 1423 "usage: install [-bCcpSsUv] [-f flags] [-g group] [-m mode] [-o owner]\n" 1424 " [-M log] [-D dest] [-h hash] [-T tags]\n" 1425 " [-B suffix] [-l linkflags] [-N dbdir]\n" 1426 " file1 file2\n" 1427 " install [-bCcpSsUv] [-f flags] [-g group] [-m mode] [-o owner]\n" 1428 " [-M log] [-D dest] [-h hash] [-T tags]\n" 1429 " [-B suffix] [-l linkflags] [-N dbdir]\n" 1430 " file1 ... fileN directory\n" 1431 " install -dU [-vU] [-g group] [-m mode] [-N dbdir] [-o owner]\n" 1432 " [-M log] [-D dest] [-h hash] [-T tags]\n" 1433 " directory ...\n"); 1434 exit(EX_USAGE); 1435 /* NOTREACHED */ 1436 } 1437 1438 /* 1439 * trymmap -- 1440 * return true (1) if mmap should be tried, false (0) if not. 1441 */ 1442 static int 1443 trymmap(int fd) 1444 { 1445 /* 1446 * The ifdef is for bootstrapping - f_fstypename doesn't exist in 1447 * pre-Lite2-merge systems. 1448 */ 1449 #ifdef MFSNAMELEN 1450 struct statfs stfs; 1451 1452 if (fstatfs(fd, &stfs) != 0) 1453 return (0); 1454 if (strcmp(stfs.f_fstypename, "ufs") == 0 || 1455 strcmp(stfs.f_fstypename, "cd9660") == 0) 1456 return (1); 1457 #endif 1458 return (0); 1459 } 1460