xinstall.c revision 1.69
1 /* $NetBSD: xinstall.c,v 1.69 2002/03/19 14:17:04 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #if HAVE_CONFIG_H 37 #include "config.h" 38 #else 39 #define HAVE_FUTIMES 1 40 #define HAVE_STRUCT_STAT_ST_FLAGS 1 41 #endif 42 43 #include <sys/cdefs.h> 44 #if defined(__COPYRIGHT) && !defined(lint) 45 __COPYRIGHT("@(#) Copyright (c) 1987, 1993\n\ 46 The Regents of the University of California. All rights reserved.\n"); 47 #endif /* not lint */ 48 49 #if defined(__RCSID) && !defined(lint) 50 #if 0 51 static char sccsid[] = "@(#)xinstall.c 8.1 (Berkeley) 7/21/93"; 52 #else 53 __RCSID("$NetBSD: xinstall.c,v 1.69 2002/03/19 14:17:04 lukem Exp $"); 54 #endif 55 #endif /* not lint */ 56 57 #include <sys/param.h> 58 #include <sys/mman.h> 59 #include <sys/stat.h> 60 #include <sys/wait.h> 61 62 #include <ctype.h> 63 #include <err.h> 64 #include <errno.h> 65 #include <fcntl.h> 66 #include <grp.h> 67 #include <libgen.h> 68 #include <paths.h> 69 #include <pwd.h> 70 #include <stdio.h> 71 #include <stdlib.h> 72 #include <string.h> 73 #include <unistd.h> 74 #include <vis.h> 75 76 #include "pathnames.h" 77 #include "stat_flags.h" 78 79 #define STRIP_ARGS_MAX 32 80 #define BACKUP_SUFFIX ".old" 81 82 int dobackup, docopy, dodir, dostrip, dolink, dopreserve, dorename, 83 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, gid; 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 96 #define LN_ABSOLUTE 0x01 97 #define LN_RELATIVE 0x02 98 #define LN_HARD 0x04 99 #define LN_SYMBOLIC 0x08 100 #define LN_MIXED 0x10 101 102 #define DIRECTORY 0x01 /* Tell install it's a directory. */ 103 #define SETFLAGS 0x02 /* Tell install to set flags. */ 104 #define HASUID 0x04 /* Tell install the uid was given */ 105 #define HASGID 0x08 /* Tell install the gid was given */ 106 107 void afterinstall(const char *, const char *, int); 108 void backup(const char *); 109 void copy(int, char *, int, char *, off_t); 110 int do_link(char *, char *); 111 void do_symlink(char *, char *); 112 void install(char *, char *, u_int); 113 void install_dir(char *, u_int); 114 int main(int, char *[]); 115 void makelink(char *, char *); 116 void metadata_log(const char *, const char *, struct timeval *, const char *); 117 int parseid(char *, id_t *); 118 void strip(char *); 119 void usage(void); 120 char *xbasename(char *); 121 char *xdirname(char *); 122 123 int 124 main(int argc, char *argv[]) 125 { 126 struct stat from_sb, to_sb; 127 void *set; 128 u_int iflags; 129 int ch, no_target; 130 char *p, *to_name; 131 132 setprogname(argv[0]); 133 134 iflags = 0; 135 while ((ch = getopt(argc, argv, "a:cbB:df:g:l:m:M:o:prsS:T:U")) != -1) 136 switch((char)ch) { 137 case 'a': 138 afterinstallcmd = strdup(optarg); 139 if (afterinstallcmd == NULL) 140 errx(1, "%s", strerror(ENOMEM)); 141 break; 142 case 'B': 143 suffix = optarg; 144 numberedbackup = 0; 145 { 146 /* Check if given suffix really generates 147 different suffixes - catch e.g. ".%" */ 148 char suffix_expanded0[FILENAME_MAX], 149 suffix_expanded1[FILENAME_MAX]; 150 (void)snprintf(suffix_expanded0, FILENAME_MAX, 151 suffix, 0); 152 (void)snprintf(suffix_expanded1, FILENAME_MAX, 153 suffix, 1); 154 if (strcmp(suffix_expanded0, suffix_expanded1) 155 != 0) 156 numberedbackup = 1; 157 } 158 /* fall through; -B implies -b */ 159 /*FALLTHROUGH*/ 160 case 'b': 161 dobackup = 1; 162 break; 163 case 'c': 164 docopy = 1; 165 break; 166 case 'd': 167 dodir = 1; 168 break; 169 #if !HAVE_CONFIG_H 170 case 'f': 171 fflags = optarg; 172 break; 173 #endif 174 case 'g': 175 group = optarg; 176 break; 177 case 'l': 178 for (p = optarg; *p; p++) 179 switch (*p) { 180 case 's': 181 dolink &= ~(LN_HARD|LN_MIXED); 182 dolink |= LN_SYMBOLIC; 183 break; 184 case 'h': 185 dolink &= ~(LN_SYMBOLIC|LN_MIXED); 186 dolink |= LN_HARD; 187 break; 188 case 'm': 189 dolink &= ~(LN_SYMBOLIC|LN_HARD); 190 dolink |= LN_MIXED; 191 break; 192 case 'a': 193 dolink &= ~LN_RELATIVE; 194 dolink |= LN_ABSOLUTE; 195 break; 196 case 'r': 197 dolink &= ~LN_ABSOLUTE; 198 dolink |= LN_RELATIVE; 199 break; 200 default: 201 errx(1, "%c: invalid link type", *p); 202 /* NOTREACHED */ 203 } 204 break; 205 case 'm': 206 if (!(set = setmode(optarg))) 207 errx(1, "%s: invalid file mode", optarg); 208 mode = getmode(set, 0); 209 free(set); 210 break; 211 case 'M': 212 metafile = optarg; 213 break; 214 case 'o': 215 owner = optarg; 216 break; 217 case 'p': 218 dopreserve = 1; 219 break; 220 case 'r': 221 dorename = 1; 222 break; 223 case 'S': 224 stripArgs = strdup(optarg); 225 if (stripArgs == NULL) 226 errx(1, "%s", strerror(ENOMEM)); 227 /* fall through; -S implies -s */ 228 /*FALLTHROUGH*/ 229 case 's': 230 dostrip = 1; 231 break; 232 case 'T': 233 tags = optarg; 234 break; 235 case 'U': 236 dounpriv = 1; 237 break; 238 case '?': 239 default: 240 usage(); 241 } 242 argc -= optind; 243 argv += optind; 244 245 /* strip and link options make no sense when creating directories */ 246 if ((dostrip || dolink) && dodir) 247 usage(); 248 249 /* strip and flags make no sense with links */ 250 if ((dostrip || fflags) && dolink) 251 usage(); 252 253 /* must have at least two arguments, except when creating directories */ 254 if (argc < 2 && !dodir) 255 usage(); 256 257 /* get group and owner id's */ 258 if (group && !dounpriv) { 259 struct group *gp; 260 261 if ((gp = getgrnam(group)) != NULL) 262 gid = gp->gr_gid; 263 else if (! parseid(group, &gid)) 264 errx(1, "unknown group %s", group); 265 iflags |= HASGID; 266 } 267 if (owner && !dounpriv) { 268 struct passwd *pp; 269 270 if ((pp = getpwnam(owner)) != NULL) 271 uid = pp->pw_uid; 272 else if (! parseid(owner, &uid)) 273 errx(1, "unknown user %s", owner); 274 iflags |= HASUID; 275 } 276 277 #if !HAVE_CONFIG_H 278 if (fflags && !dounpriv) { 279 if (string_to_flags(&fflags, &fileflags, NULL)) 280 errx(1, "%s: invalid flag", fflags); 281 iflags |= SETFLAGS; 282 } 283 #endif 284 285 if (metafile) { 286 if ((metafp = fopen(metafile, "a")) == NULL) 287 warn("open %s", metafile); 288 } 289 290 if (dodir) { 291 for (; *argv != NULL; ++argv) 292 install_dir(*argv, iflags); 293 exit (0); 294 } 295 296 no_target = stat(to_name = argv[argc - 1], &to_sb); 297 if (!no_target && S_ISDIR(to_sb.st_mode)) { 298 for (; *argv != to_name; ++argv) 299 install(*argv, to_name, iflags | DIRECTORY); 300 exit(0); 301 } 302 303 /* can't do file1 file2 directory/file */ 304 if (argc != 2) 305 usage(); 306 307 if (!no_target) { 308 /* makelink() handles checks for links */ 309 if (!dolink) { 310 if (stat(*argv, &from_sb)) 311 err(1, "%s: stat", *argv); 312 if (!S_ISREG(to_sb.st_mode)) 313 errx(1, "%s: not a regular file", to_name); 314 if (to_sb.st_dev == from_sb.st_dev && 315 to_sb.st_ino == from_sb.st_ino) 316 errx(1, "%s and %s are the same file", *argv, 317 to_name); 318 } 319 /* 320 * Unlink now... avoid ETXTBSY errors later. Try and turn 321 * off the append/immutable bits -- if we fail, go ahead, 322 * it might work. 323 */ 324 #if !HAVE_CONFIG_H 325 #define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND) 326 if (to_sb.st_flags & NOCHANGEBITS) 327 (void)chflags(to_name, 328 to_sb.st_flags & ~(NOCHANGEBITS)); 329 #endif 330 if (dobackup) 331 backup(to_name); 332 else if (!dorename) 333 (void)unlink(to_name); 334 } 335 install(*argv, to_name, iflags); 336 exit(0); 337 } 338 339 /* 340 * parseid -- 341 * parse uid or gid from arg into id, returning non-zero if successful 342 */ 343 int 344 parseid(char *name, id_t *id) 345 { 346 char *ep; 347 348 errno = 0; 349 *id = (id_t)strtoul(name, &ep, 10); 350 if (errno || *ep != '\0') 351 return (0); 352 return (1); 353 } 354 355 /* 356 * do_link -- 357 * make a hard link, obeying dorename if set 358 * return -1 on failure 359 */ 360 int 361 do_link(char *from_name, char *to_name) 362 { 363 char tmpl[MAXPATHLEN]; 364 int ret; 365 366 if (dorename) { 367 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 368 xdirname(to_name)); 369 /* This usage is safe. The linker will bitch anyway. */ 370 if (mktemp(tmpl) == NULL) 371 err(1, "%s: mktemp", tmpl); 372 ret = link(from_name, tmpl); 373 if (ret == 0) { 374 ret = rename(tmpl, to_name); 375 if (ret < 0) 376 /* remove temporary link before exiting */ 377 (void)unlink(tmpl); 378 } 379 return (ret); 380 } else 381 return (link(from_name, to_name)); 382 } 383 384 /* 385 * do_symlink -- 386 * make a symbolic link, obeying dorename if set 387 * exit on failure 388 */ 389 void 390 do_symlink(char *from_name, char *to_name) 391 { 392 char tmpl[MAXPATHLEN]; 393 394 if (dorename) { 395 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 396 xdirname(to_name)); 397 /* This usage is safe. The linker will bitch anyway. */ 398 if (mktemp(tmpl) == NULL) 399 err(1, "%s: mktemp", tmpl); 400 401 if (symlink(from_name, tmpl) == -1) 402 err(1, "symlink %s -> %s", from_name, tmpl); 403 if (rename(tmpl, to_name) == -1) { 404 /* remove temporary link before exiting */ 405 (void)unlink(tmpl); 406 err(1, "%s: rename", to_name); 407 } 408 } else { 409 if (symlink(from_name, to_name) == -1) 410 err(1, "symlink %s -> %s", from_name, to_name); 411 } 412 } 413 414 /* 415 * makelink -- 416 * make a link from source to destination 417 */ 418 void 419 makelink(char *from_name, char *to_name) 420 { 421 char src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN]; 422 struct stat to_sb; 423 424 /* Try hard links first */ 425 if (dolink & (LN_HARD|LN_MIXED)) { 426 if (do_link(from_name, to_name) == -1) { 427 if ((dolink & LN_HARD) || errno != EXDEV) 428 err(1, "link %s -> %s", from_name, to_name); 429 } else { 430 if (stat(to_name, &to_sb)) 431 err(1, "%s: stat", to_name); 432 if (S_ISREG(to_sb.st_mode)) { 433 /* XXX: only metalog hardlinked files */ 434 int omode; 435 char *oowner, *ogroup, *offlags; 436 437 /* XXX: use underlying perms */ 438 omode = mode; 439 mode = (to_sb.st_mode & 0777); 440 oowner = owner; 441 owner = NULL; 442 ogroup = group; 443 group = NULL; 444 offlags = fflags; 445 fflags = NULL; 446 metadata_log(to_name, "file", NULL, NULL); 447 mode = omode; 448 owner = oowner; 449 group = ogroup; 450 fflags = offlags; 451 } 452 return; 453 } 454 } 455 456 /* Symbolic links */ 457 if (dolink & LN_ABSOLUTE) { 458 /* Convert source path to absolute */ 459 if (realpath(from_name, src) == NULL) 460 err(1, "%s: realpath", from_name); 461 do_symlink(src, to_name); 462 metadata_log(to_name, "link", NULL, src); 463 return; 464 } 465 466 if (dolink & LN_RELATIVE) { 467 char *cp, *d, *s; 468 469 /* Resolve pathnames */ 470 if (realpath(from_name, src) == NULL) 471 err(1, "%s: realpath", from_name); 472 473 /* 474 * The last component of to_name may be a symlink, 475 * so use realpath to resolve only the directory. 476 */ 477 cp = xdirname(to_name); 478 if (realpath(cp, dst) == NULL) 479 err(1, "%s: realpath", cp); 480 /* .. and add the last component */ 481 if (strcmp(dst, "/") != 0) { 482 if (strlcat(dst, "/", sizeof(dst)) > sizeof(dst)) 483 errx(1, "resolved pathname too long"); 484 } 485 cp = xbasename(to_name); 486 if (strlcat(dst, cp, sizeof(dst)) > sizeof(dst)) 487 errx(1, "resolved pathname too long"); 488 489 /* trim common path components */ 490 for (s = src, d = dst; *s == *d; s++, d++) 491 continue; 492 while (*s != '/') 493 s--, d--; 494 495 /* count the number of directories we need to backtrack */ 496 for (++d, lnk[0] = '\0'; *d; d++) 497 if (*d == '/') 498 (void)strcat(lnk, "../"); 499 500 (void)strcat(lnk, ++s); 501 502 do_symlink(lnk, dst); 503 metadata_log(dst, "link", NULL, lnk); 504 return; 505 } 506 507 /* 508 * If absolute or relative was not specified, 509 * try the names the user provided 510 */ 511 do_symlink(from_name, to_name); 512 metadata_log(to_name, "link", NULL, from_name); 513 } 514 515 /* 516 * install -- 517 * build a path name and install the file 518 */ 519 void 520 install(char *from_name, char *to_name, u_int flags) 521 { 522 struct stat from_sb; 523 #if !HAVE_CONFIG_H 524 struct stat to_sb; 525 #endif 526 struct timeval tv[2]; 527 int devnull, from_fd, to_fd, serrno, tmpmode; 528 char *p, tmpl[MAXPATHLEN], *oto_name; 529 530 if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) { 531 if (!dolink) { 532 if (stat(from_name, &from_sb)) 533 err(1, "%s: stat", from_name); 534 if (!S_ISREG(from_sb.st_mode)) 535 errx(1, "%s: not a regular file", from_name); 536 } 537 /* Build the target path. */ 538 if (flags & DIRECTORY) { 539 (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s", 540 to_name, 541 (p = strrchr(from_name, '/')) ? ++p : from_name); 542 to_name = pathbuf; 543 } 544 devnull = 0; 545 } else { 546 #if HAVE_STRUCT_STAT_ST_FLAGS 547 from_sb.st_flags = 0; /* XXX */ 548 #endif 549 devnull = 1; 550 } 551 552 /* 553 * Unlink now... avoid ETXTBSY errors later. Try and turn 554 * off the append/immutable bits -- if we fail, go ahead, 555 * it might work. 556 */ 557 #if !HAVE_CONFIG_H 558 if (stat(to_name, &to_sb) == 0 && 559 to_sb.st_flags & (NOCHANGEBITS)) 560 (void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS)); 561 #endif 562 if (dorename) { 563 (void)snprintf(tmpl, sizeof(tmpl), "%s/inst.XXXXXX", 564 xdirname(to_name)); 565 oto_name = to_name; 566 to_name = tmpl; 567 } else { 568 oto_name = NULL; /* pacify gcc */ 569 if (dobackup) 570 backup(to_name); 571 else 572 (void)unlink(to_name); 573 } 574 575 if (dolink) { 576 makelink(from_name, dorename ? oto_name : to_name); 577 return; 578 } 579 580 /* Create target. */ 581 if (dorename) { 582 if ((to_fd = mkstemp(to_name)) == -1) 583 err(1, "%s: mkstemp", to_name); 584 } else { 585 if ((to_fd = open(to_name, 586 O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0) 587 err(1, "%s: open", to_name); 588 } 589 if (!devnull) { 590 if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) { 591 (void)unlink(to_name); 592 err(1, "%s: open", from_name); 593 } 594 copy(from_fd, from_name, to_fd, to_name, from_sb.st_size); 595 (void)close(from_fd); 596 } 597 598 if (dostrip) { 599 strip(to_name); 600 601 /* 602 * Re-open our fd on the target, in case we used a strip 603 * that does not work in-place -- like gnu binutils strip. 604 */ 605 close(to_fd); 606 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 607 err(1, "stripping %s", to_name); 608 } 609 610 if (afterinstallcmd != NULL) { 611 afterinstall(afterinstallcmd, to_name, 1); 612 613 /* 614 * Re-open our fd on the target, in case we used an 615 * after-install command that does not work in-place 616 */ 617 close(to_fd); 618 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 619 err(1, "running after install command on %s", to_name); 620 } 621 622 /* 623 * Set owner, group, mode for target; do the chown first, 624 * chown may lose the setuid bits. 625 */ 626 if (!dounpriv && 627 (flags & (HASUID | HASGID)) && fchown(to_fd, uid, gid) == -1) { 628 serrno = errno; 629 (void)unlink(to_name); 630 errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno)); 631 } 632 tmpmode = mode; 633 if (dounpriv) 634 tmpmode &= S_IRWXU|S_IRWXG|S_IRWXO; 635 if (fchmod(to_fd, tmpmode) == -1) { 636 serrno = errno; 637 (void)unlink(to_name); 638 errx(1, "%s: chmod: %s", to_name, strerror(serrno)); 639 } 640 641 /* 642 * Preserve the date of the source file. 643 */ 644 if (dopreserve) { 645 #ifdef BSD4_4 646 TIMESPEC_TO_TIMEVAL(&tv[0], &from_sb.st_atimespec); 647 TIMESPEC_TO_TIMEVAL(&tv[1], &from_sb.st_mtimespec); 648 #else 649 tv[0].tv_sec = from_sb.st_atime; 650 tv[0].tv_usec = 0; 651 tv[1].tv_sec = from_sb.st_mtime; 652 tv[1].tv_usec = 0; 653 #endif 654 #if HAVE_FUTIMES 655 if (futimes(to_fd, tv) == -1) 656 warn("%s: futimes", to_name); 657 #else 658 if (utimes(to_name, tv) == -1) 659 warn("%s: utimes", to_name); 660 #endif 661 } 662 663 (void)close(to_fd); 664 665 if (dorename) { 666 if (rename(to_name, oto_name) == -1) 667 err(1, "%s: rename", to_name); 668 to_name = oto_name; 669 } 670 671 if (!docopy && !devnull && unlink(from_name)) 672 err(1, "%s: unlink", from_name); 673 674 /* 675 * If provided a set of flags, set them, otherwise, preserve the 676 * flags, except for the dump flag. 677 */ 678 #if !HAVE_CONFIG_H 679 if (!dounpriv && chflags(to_name, 680 flags & SETFLAGS ? fileflags : from_sb.st_flags & ~UF_NODUMP) == -1) 681 { 682 if (errno != EOPNOTSUPP || (from_sb.st_flags & ~UF_NODUMP) != 0) 683 warn("%s: chflags", to_name); 684 } 685 #endif 686 687 metadata_log(to_name, "file", tv, NULL); 688 } 689 690 /* 691 * copy -- 692 * copy from one file to another 693 */ 694 void 695 copy(int from_fd, char *from_name, int to_fd, char *to_name, off_t size) 696 { 697 ssize_t nr, nw; 698 int serrno; 699 char *p; 700 char buf[MAXBSIZE]; 701 702 /* 703 * There's no reason to do anything other than close the file 704 * now if it's empty, so let's not bother. 705 */ 706 if (size > 0) { 707 708 /* 709 * Mmap and write if less than 8M (the limit is so we 710 * don't totally trash memory on big files). This is 711 * really a minor hack, but it wins some CPU back. 712 */ 713 714 if (size <= 8 * 1048576) { 715 if ((p = mmap(NULL, (size_t)size, PROT_READ, 716 MAP_FILE|MAP_SHARED, from_fd, (off_t)0)) 717 == MAP_FAILED) { 718 goto mmap_failed; 719 } 720 #ifdef MADV_SEQUENTIAL 721 if (madvise(p, (size_t)size, MADV_SEQUENTIAL) == -1 722 && errno != EOPNOTSUPP) 723 warnx("madvise: %s", strerror(errno)); 724 #endif 725 726 if (write(to_fd, p, size) != size) { 727 serrno = errno; 728 (void)unlink(to_name); 729 errx(1, "%s: write: %s", 730 to_name, strerror(serrno)); 731 } 732 } else { 733 mmap_failed: 734 while ((nr = read(from_fd, buf, sizeof(buf))) > 0) { 735 if ((nw = write(to_fd, buf, nr)) != nr) { 736 serrno = errno; 737 (void)unlink(to_name); 738 errx(1, "%s: write: %s", to_name, 739 strerror(nw > 0 ? EIO : serrno)); 740 } 741 } 742 if (nr != 0) { 743 serrno = errno; 744 (void)unlink(to_name); 745 errx(1, "%s: read: %s", from_name, strerror(serrno)); 746 } 747 } 748 } 749 } 750 751 /* 752 * strip -- 753 * use strip(1) to strip the target file 754 */ 755 void 756 strip(char *to_name) 757 { 758 int serrno, status; 759 char *stripprog; 760 761 switch (vfork()) { 762 case -1: 763 serrno = errno; 764 (void)unlink(to_name); 765 errx(1, "vfork: %s", strerror(serrno)); 766 /*NOTREACHED*/ 767 case 0: 768 stripprog = getenv("STRIP"); 769 if (stripprog == NULL) 770 stripprog = _PATH_STRIP; 771 772 if (stripArgs) { 773 /* 774 * build up a command line and let /bin/sh 775 * parse the arguments 776 */ 777 char* cmd = (char*)malloc(sizeof(char)* 778 (3+strlen(stripprog)+ 779 strlen(stripArgs)+ 780 strlen(to_name))); 781 782 if (cmd == NULL) 783 errx(1, "%s", strerror(ENOMEM)); 784 785 sprintf(cmd, "%s %s %s", stripprog, stripArgs, to_name); 786 787 execl(_PATH_BSHELL, "sh", "-c", cmd, NULL); 788 } else 789 execlp(stripprog, "strip", to_name, NULL); 790 791 warn("%s: exec of strip", stripprog); 792 _exit(1); 793 /*NOTREACHED*/ 794 default: 795 if (wait(&status) == -1 || status) 796 (void)unlink(to_name); 797 } 798 } 799 800 /* 801 * afterinstall -- 802 * run provided command on the target file or directory after it's been 803 * installed and stripped, but before permissions are set or it's renamed 804 */ 805 void 806 afterinstall(const char *command, const char *to_name, int errunlink) 807 { 808 int serrno, status; 809 char *cmd; 810 811 switch (vfork()) { 812 case -1: 813 serrno = errno; 814 if (errunlink) 815 (void)unlink(to_name); 816 errx(1, "vfork: %s", strerror(serrno)); 817 /*NOTREACHED*/ 818 case 0: 819 /* 820 * build up a command line and let /bin/sh 821 * parse the arguments 822 */ 823 cmd = (char*)malloc(sizeof(char)* 824 (2+strlen(command)+ 825 strlen(to_name))); 826 827 if (cmd == NULL) 828 errx(1, "%s", strerror(ENOMEM)); 829 830 sprintf(cmd, "%s %s", command, to_name); 831 832 execl(_PATH_BSHELL, "sh", "-c", cmd, NULL); 833 834 warn("%s: exec of after install command", command); 835 _exit(1); 836 /*NOTREACHED*/ 837 default: 838 if ((wait(&status) == -1 || status) && errunlink) 839 (void)unlink(to_name); 840 } 841 } 842 843 /* 844 * backup -- 845 * backup file "to_name" to to_name.suffix 846 * if suffix contains a "%", it's taken as a printf(3) pattern 847 * used for a numbered backup. 848 */ 849 void 850 backup(const char *to_name) 851 { 852 char bname[FILENAME_MAX]; 853 854 if (numberedbackup) { 855 /* Do numbered backup */ 856 int cnt; 857 char suffix_expanded[FILENAME_MAX]; 858 859 cnt=0; 860 do { 861 (void)snprintf(suffix_expanded, FILENAME_MAX, suffix, 862 cnt); 863 (void)snprintf(bname, FILENAME_MAX, "%s%s", to_name, 864 suffix_expanded); 865 cnt++; 866 } while (access(bname, F_OK) == 0); 867 } else { 868 /* Do simple backup */ 869 (void)snprintf(bname, FILENAME_MAX, "%s%s", to_name, suffix); 870 } 871 872 (void)rename(to_name, bname); 873 } 874 875 /* 876 * install_dir -- 877 * build directory hierarchy 878 */ 879 void 880 install_dir(char *path, u_int flags) 881 { 882 char *p; 883 struct stat sb; 884 int ch; 885 886 for (p = path;; ++p) 887 if (!*p || (p != path && *p == '/')) { 888 ch = *p; 889 *p = '\0'; 890 if (stat(path, &sb)) { 891 if (errno != ENOENT || mkdir(path, 0777) < 0) { 892 err(1, "%s: mkdir", path); 893 } 894 } 895 if (!(*p = ch)) 896 break; 897 } 898 899 if (afterinstallcmd != NULL) 900 afterinstall(afterinstallcmd, path, 0); 901 902 if (!dounpriv && ( 903 ((flags & (HASUID | HASGID)) && chown(path, uid, gid) == -1) 904 || chmod(path, mode) == -1 )) { 905 warn("%s: chown/chmod", path); 906 } 907 metadata_log(path, "dir", NULL, NULL); 908 } 909 910 /* 911 * metadata_log -- 912 * if metafp is not NULL, output mtree(8) full path name and settings to 913 * metafp, to allow permissions to be set correctly by other tools. 914 */ 915 void 916 metadata_log(const char *path, const char *type, struct timeval *tv, 917 const char *link) 918 { 919 const char extra[] = { ' ', '\t', '\n', '\\', '#', '\0' }; 920 char *buf; 921 922 if (!metafp) 923 return; 924 buf = (char *)malloc(4 * strlen(path) + 1); /* buf for strsvis(3) */ 925 if (buf == NULL) { 926 warnx("%s", strerror(ENOMEM)); 927 return; 928 } 929 if (flock(fileno(metafp), LOCK_EX) == -1) { /* lock log file */ 930 warn("can't lock %s", metafile); 931 return; 932 } 933 934 strsvis(buf, path, VIS_CSTYLE, extra); /* encode name */ 935 fprintf(metafp, ".%s%s type=%s mode=%#o", /* print details */ 936 buf[0] == '/' ? "" : "/", buf, type, mode); 937 if (link) 938 fprintf(metafp, " link=%s", link); 939 if (owner) 940 fprintf(metafp, " uname=%s", owner); 941 if (group) 942 fprintf(metafp, " gname=%s", group); 943 if (fflags) 944 fprintf(metafp, " flags=%s", fflags); 945 if (tags) 946 fprintf(metafp, " tags=%s", tags); 947 if (tv != NULL && dopreserve) 948 fprintf(metafp, " time=%ld.%ld", tv[1].tv_sec, tv[1].tv_usec); 949 fputc('\n', metafp); 950 fflush(metafp); /* flush output */ 951 if (flock(fileno(metafp), LOCK_UN) == -1) { /* unlock log file */ 952 warn("can't unlock %s", metafile); 953 } 954 free(buf); 955 } 956 957 /* 958 * xbasename -- 959 * libc basename(3) that returns a pointer to a static buffer 960 * instead of overwriting that passed-in string. 961 */ 962 char * 963 xbasename(char *path) 964 { 965 static char tmp[MAXPATHLEN]; 966 967 (void)strlcpy(tmp, path, sizeof(tmp)); 968 return (basename(tmp)); 969 } 970 971 /* 972 * xdirname -- 973 * libc dirname(3) that returns a pointer to a static buffer 974 * instead of overwriting that passed-in string. 975 */ 976 char * 977 xdirname(char *path) 978 { 979 static char tmp[MAXPATHLEN]; 980 981 (void)strlcpy(tmp, path, sizeof(tmp)); 982 return (dirname(tmp)); 983 } 984 985 /* 986 * usage -- 987 * print a usage message and die 988 */ 989 void 990 usage(void) 991 { 992 const char *prog; 993 994 prog = getprogname(); 995 996 (void)fprintf(stderr, 997 "usage: %s [-Ubcprs] [-M log] [-T tags] [-B suffix] [-a afterinstallcmd]\n" 998 " [-f flags] [-m mode] [-o owner] [-g group] [-l linkflags]\n" 999 " [-S stripflags] file1 file2\n" 1000 " %s [-Ubcprs] [-M log] [-T tags] [-B suffix] [-a afterinstallcmd]\n" 1001 " [-f flags] [-m mode] [-o owner] [-g group] [-l linkflags]\n" 1002 " [-S stripflags] file1 ... fileN directory\n" 1003 " %s -d [-Up] [-M log] [-T tags] [-a afterinstallcmd] [-m mode]\n" 1004 " [-o owner] [-g group] directory ...\n", 1005 prog, prog, prog); 1006 exit(1); 1007 } 1008
Indexes created Mon Sep 29 21:09:56 GMT 2025