xinstall.c revision 1.49
1 /* $NetBSD: xinstall.c,v 1.49 2001/09/15 16:45:23 simonb 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 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1987, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)xinstall.c 8.1 (Berkeley) 7/21/93"; 45 #else 46 __RCSID("$NetBSD: xinstall.c,v 1.49 2001/09/15 16:45:23 simonb Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 #include <sys/param.h> 51 #include <sys/wait.h> 52 #include <sys/mman.h> 53 #include <sys/stat.h> 54 55 #include <ctype.h> 56 #include <errno.h> 57 #include <fcntl.h> 58 #include <grp.h> 59 #include <paths.h> 60 #include <pwd.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <unistd.h> 65 #include <err.h> 66 67 #include "pathnames.h" 68 #include "stat_flags.h" 69 70 #define STRIP_ARGS_MAX 32 71 #define BACKUP_SUFFIX ".old" 72 73 struct passwd *pp; 74 struct group *gp; 75 int dobackup=0, docopy=0, dodir=0, dostrip=0, dolink=0, dopreserve=0, 76 dorename = 0, unpriv = 0; 77 static int numberedbackup = 0; 78 int mode = S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH; 79 char pathbuf[MAXPATHLEN]; 80 uid_t uid; 81 gid_t gid; 82 char *stripArgs=NULL; 83 char *suffix=BACKUP_SUFFIX; 84 85 #define LN_ABSOLUTE 0x01 86 #define LN_RELATIVE 0x02 87 #define LN_HARD 0x04 88 #define LN_SYMBOLIC 0x08 89 #define LN_MIXED 0x10 90 91 #define DIRECTORY 0x01 /* Tell install it's a directory. */ 92 #define SETFLAGS 0x02 /* Tell install to set flags. */ 93 94 void copy(int, char *, int, char *, off_t); 95 void makelink(char *, char *); 96 void install(char *, char *, u_long, u_int); 97 void install_dir(char *); 98 void strip(char *); 99 void backup(const char *); 100 void usage(void); 101 int main(int, char *[]); 102 103 int 104 main(int argc, char *argv[]) 105 { 106 struct stat from_sb, to_sb; 107 void *set; 108 u_long fset; 109 u_int iflags; 110 int ch, no_target; 111 char *p; 112 char *flags = NULL, *to_name, *group = NULL, *owner = NULL; 113 114 setprogname(argv[0]); 115 116 iflags = 0; 117 while ((ch = getopt(argc, argv, "cbB:df:g:l:m:o:prsS:U")) != -1) 118 switch((char)ch) { 119 case 'B': 120 suffix = optarg; 121 numberedbackup = 0; 122 { 123 /* Check if given suffix really generates 124 different suffixes - catch e.g. ".%" */ 125 char suffix_expanded0[FILENAME_MAX], 126 suffix_expanded1[FILENAME_MAX]; 127 (void)snprintf(suffix_expanded0, FILENAME_MAX, 128 suffix, 0); 129 (void)snprintf(suffix_expanded1, FILENAME_MAX, 130 suffix, 1); 131 if (strcmp(suffix_expanded0, suffix_expanded1) 132 != 0) 133 numberedbackup = 1; 134 } 135 /* fall through; -B implies -b */ 136 case 'b': 137 dobackup = 1; 138 break; 139 case 'c': 140 docopy = 1; 141 break; 142 case 'd': 143 dodir = 1; 144 break; 145 case 'f': 146 flags = optarg; 147 if (string_to_flags(&flags, &fset, NULL)) 148 errx(1, "%s: invalid flag", flags); 149 iflags |= SETFLAGS; 150 break; 151 case 'g': 152 group = optarg; 153 break; 154 case 'l': 155 for (p = optarg; *p; p++) 156 switch (*p) { 157 case 's': 158 dolink &= ~(LN_HARD|LN_MIXED); 159 dolink |= LN_SYMBOLIC; 160 break; 161 case 'h': 162 dolink &= ~(LN_SYMBOLIC|LN_MIXED); 163 dolink |= LN_HARD; 164 break; 165 case 'm': 166 dolink &= ~(LN_SYMBOLIC|LN_HARD); 167 dolink |= LN_MIXED; 168 break; 169 case 'a': 170 dolink &= ~LN_RELATIVE; 171 dolink |= LN_ABSOLUTE; 172 break; 173 case 'r': 174 dolink &= ~LN_ABSOLUTE; 175 dolink |= LN_RELATIVE; 176 break; 177 default: 178 errx(1, "%c: invalid link type", *p); 179 break; 180 } 181 break; 182 case 'm': 183 if (!(set = setmode(optarg))) 184 errx(1, "%s: invalid file mode", optarg); 185 mode = getmode(set, 0); 186 free(set); 187 break; 188 case 'o': 189 owner = optarg; 190 break; 191 case 'p': 192 dopreserve = 1; 193 break; 194 case 'r': 195 dorename = 1; 196 break; 197 case 'S': 198 stripArgs = strdup(optarg); 199 if (stripArgs == NULL) 200 errx(1, "%s", strerror(ENOMEM)); 201 /* fall through; -S implies -s */ 202 case 's': 203 dostrip = 1; 204 break; 205 case 'U': 206 unpriv = 1; 207 break; 208 case '?': 209 default: 210 usage(); 211 } 212 argc -= optind; 213 argv += optind; 214 215 /* strip and link options make no sense when creating directories */ 216 if ((dostrip || dolink) && dodir) 217 usage(); 218 219 /* strip and flags make no sense with links */ 220 if ((dostrip || flags) && dolink) 221 usage(); 222 223 /* must have at least two arguments, except when creating directories */ 224 if (argc < 2 && !dodir) 225 usage(); 226 227 /* get group and owner id's */ 228 if (unpriv) 229 uid = gid = -1; 230 else { 231 if (group && !(gp = getgrnam(group)) && 232 !isdigit((unsigned char)*group)) 233 errx(1, "unknown group %s", group); 234 gid = (group) ? ((gp) ? gp->gr_gid : atoi(group)) : -1; 235 if (owner && !(pp = getpwnam(owner)) && 236 !isdigit((unsigned char)*owner)) 237 errx(1, "unknown user %s", owner); 238 uid = (owner) ? ((pp) ? pp->pw_uid : atoi(owner)) : -1; 239 } 240 241 if (dodir) { 242 for (; *argv != NULL; ++argv) 243 install_dir(*argv); 244 exit (0); 245 } 246 247 no_target = stat(to_name = argv[argc - 1], &to_sb); 248 if (!no_target && S_ISDIR(to_sb.st_mode)) { 249 for (; *argv != to_name; ++argv) 250 install(*argv, to_name, fset, iflags | DIRECTORY); 251 exit(0); 252 } 253 254 /* can't do file1 file2 directory/file */ 255 if (argc != 2) 256 usage(); 257 258 if (!no_target) { 259 if (stat(*argv, &from_sb)) 260 err(1, "%s", *argv); 261 if (!S_ISREG(to_sb.st_mode)) 262 errx(1, "%s: not a regular file", to_name); 263 if (!dolink && to_sb.st_dev == from_sb.st_dev && 264 to_sb.st_ino == from_sb.st_ino) 265 errx(1, "%s and %s are the same file", *argv, to_name); 266 /* 267 * Unlink now... avoid ETXTBSY errors later. Try and turn 268 * off the append/immutable bits -- if we fail, go ahead, 269 * it might work. 270 */ 271 #define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND) 272 if (to_sb.st_flags & NOCHANGEBITS) 273 (void)chflags(to_name, 274 to_sb.st_flags & ~(NOCHANGEBITS)); 275 if (dobackup) 276 backup(to_name); 277 else if (!dorename) 278 (void)unlink(to_name); 279 } 280 install(*argv, to_name, fset, iflags); 281 exit(0); 282 } 283 284 /* 285 * makelink -- 286 * make a link from source to destination 287 */ 288 void 289 makelink(char *from_name, char *to_name) 290 { 291 char src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN]; 292 293 /* Try hard links first */ 294 if (dolink & (LN_HARD|LN_MIXED)) { 295 if (link(from_name, to_name) == -1) { 296 if ((dolink & LN_HARD) || errno != EXDEV) 297 err(1, "link %s -> %s", from_name, to_name); 298 } 299 else 300 return; 301 } 302 303 /* Symbolic links */ 304 if (dolink & LN_ABSOLUTE) { 305 /* Convert source path to absolute */ 306 if (realpath(from_name, src) == NULL) 307 err(1, "%s", src); 308 if (symlink(src, to_name) == -1) 309 err(1, "symlink %s -> %s", src, to_name); 310 return; 311 } 312 313 if (dolink & LN_RELATIVE) { 314 char *s, *d; 315 316 /* Resolve pathnames */ 317 if (realpath(from_name, src) == NULL) 318 err(1, "%s", src); 319 if (realpath(to_name, dst) == NULL) 320 err(1, "%s", dst); 321 322 /* trim common path components */ 323 for (s = src, d = dst; *s == *d; s++, d++) 324 continue; 325 while (*s != '/') 326 s--, d--; 327 328 /* count the number of directories we need to backtrack */ 329 for (++d, lnk[0] = '\0'; *d; d++) 330 if (*d == '/') 331 (void) strcat(lnk, "../"); 332 333 (void) strcat(lnk, ++s); 334 335 if (symlink(lnk, dst) == -1) 336 err(1, "symlink %s -> %s", lnk, dst); 337 return; 338 } 339 340 /* 341 * If absolute or relative was not specified, 342 * try the names the user provided 343 */ 344 if (symlink(from_name, to_name) == -1) 345 err(1, "symlink %s -> %s", from_name, to_name); 346 347 } 348 349 /* 350 * install -- 351 * build a path name and install the file 352 */ 353 void 354 install(char *from_name, char *to_name, u_long fset, u_int flags) 355 { 356 struct stat from_sb, to_sb; 357 int devnull, from_fd, to_fd, serrno; 358 char *p, tmpl[MAXPATHLEN], *oto_name; 359 360 /* If try to install NULL file to a directory, fails. */ 361 if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) { 362 if (stat(from_name, &from_sb)) 363 err(1, "%s", from_name); 364 if (!S_ISREG(from_sb.st_mode)) 365 errx(1, "%s: not a regular file", to_name); 366 /* Build the target path. */ 367 if (flags & DIRECTORY) { 368 (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s", 369 to_name, 370 (p = strrchr(from_name, '/')) ? ++p : from_name); 371 to_name = pathbuf; 372 } 373 devnull = 0; 374 } else { 375 from_sb.st_flags = 0; /* XXX */ 376 devnull = 1; 377 } 378 379 /* 380 * Unlink now... avoid ETXTBSY errors later. Try and turn 381 * off the append/immutable bits -- if we fail, go ahead, 382 * it might work. 383 */ 384 if (stat(to_name, &to_sb) == 0 && 385 to_sb.st_flags & (NOCHANGEBITS)) 386 (void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS)); 387 if (dorename) { 388 char *ptr, c, *dir; 389 390 if ((ptr = strrchr(to_name, '/')) != NULL) { 391 c = *++ptr; 392 *ptr = '\0'; 393 dir = to_name; 394 } else { 395 c = '\0'; /* pacify gcc */ 396 dir = tmpl; 397 *dir = '\0'; 398 } 399 (void)snprintf(tmpl, sizeof(tmpl), "%sinst.XXXXXX", dir); 400 if (ptr) 401 *ptr = c; 402 oto_name = to_name; 403 to_name = tmpl; 404 405 } else { 406 oto_name = NULL; /* pacify gcc */ 407 if (dobackup) 408 backup(to_name); 409 else 410 (void)unlink(to_name); 411 } 412 413 if (dolink) { 414 makelink(from_name, to_name); 415 return; 416 } 417 418 /* Create target. */ 419 if (dorename) { 420 if ((to_fd = mkstemp(to_name)) == -1) 421 err(1, "%s", to_name); 422 } else { 423 if ((to_fd = open(to_name, 424 O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0) 425 err(1, "%s", to_name); 426 } 427 if (!devnull) { 428 if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) { 429 (void)unlink(to_name); 430 err(1, "%s", from_name); 431 } 432 copy(from_fd, from_name, to_fd, to_name, from_sb.st_size); 433 (void)close(from_fd); 434 } 435 436 if (dostrip) { 437 strip(to_name); 438 439 /* 440 * Re-open our fd on the target, in case we used a strip 441 * that does not work in-place -- like gnu binutils strip. 442 */ 443 close(to_fd); 444 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 445 err(1, "stripping %s", to_name); 446 } 447 448 /* 449 * Set owner, group, mode for target; do the chown first, 450 * chown may lose the setuid bits. 451 */ 452 if ((gid != -1 || uid != -1) && fchown(to_fd, uid, gid)) { 453 serrno = errno; 454 (void)unlink(to_name); 455 errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno)); 456 } 457 if (fchmod(to_fd, mode)) { 458 serrno = errno; 459 (void)unlink(to_name); 460 errx(1, "%s: chmod: %s", to_name, strerror(serrno)); 461 } 462 463 /* 464 * If provided a set of flags, set them, otherwise, preserve the 465 * flags, except for the dump flag. 466 */ 467 if (fchflags(to_fd, 468 flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) { 469 if (errno != EOPNOTSUPP || (from_sb.st_flags & ~UF_NODUMP) != 0) 470 warn("%s: chflags", to_name); 471 } 472 473 /* 474 * Preserve the date of the source file. 475 */ 476 if (dopreserve) { 477 struct timeval tv[2]; 478 479 #ifdef BSD4_4 480 TIMESPEC_TO_TIMEVAL(&tv[0], &from_sb.st_atimespec); 481 TIMESPEC_TO_TIMEVAL(&tv[1], &from_sb.st_mtimespec); 482 #else 483 tv[0].tv_sec = from_sb.st_atime; 484 tv[0].tv_usec = 0; 485 tv[1].tv_sec = from_sb.st_mtime; 486 tv[1].tv_usec = 0; 487 #endif 488 if (futimes(to_fd, tv) == -1) 489 warn("%s: futimes", to_name); 490 } 491 492 (void)close(to_fd); 493 494 if (dorename) 495 if (rename(to_name, oto_name) == -1) 496 err(1, "%s: rename", to_name); 497 498 if (!docopy && !devnull && unlink(from_name)) 499 err(1, "%s", from_name); 500 } 501 502 /* 503 * copy -- 504 * copy from one file to another 505 */ 506 void 507 copy(int from_fd, char *from_name, int to_fd, char *to_name, off_t size) 508 { 509 ssize_t nr, nw; 510 int serrno; 511 char *p; 512 char buf[MAXBSIZE]; 513 514 /* 515 * There's no reason to do anything other than close the file 516 * now if it's empty, so let's not bother. 517 */ 518 if (size > 0) { 519 520 /* 521 * Mmap and write if less than 8M (the limit is so we 522 * don't totally trash memory on big files). This is 523 * really a minor hack, but it wins some CPU back. 524 */ 525 526 if (size <= 8 * 1048576) { 527 if ((p = mmap(NULL, (size_t)size, PROT_READ, 528 MAP_FILE|MAP_SHARED, from_fd, (off_t)0)) 529 == MAP_FAILED) { 530 goto mmap_failed; 531 } 532 #ifdef MADV_SEQUENTIAL 533 if (madvise(p, (size_t)size, MADV_SEQUENTIAL) == -1 534 && errno != EOPNOTSUPP) 535 warnx("madvise: %s", strerror(errno)); 536 #endif 537 538 if (write(to_fd, p, size) != size) { 539 serrno = errno; 540 (void)unlink(to_name); 541 errx(1, "%s: %s", 542 to_name, strerror(serrno)); 543 } 544 } else { 545 mmap_failed: 546 while ((nr = read(from_fd, buf, sizeof(buf))) > 0) { 547 if ((nw = write(to_fd, buf, nr)) != nr) { 548 serrno = errno; 549 (void)unlink(to_name); 550 errx(1, "%s: %s", to_name, 551 strerror(nw > 0 ? EIO : serrno)); 552 } 553 } 554 if (nr != 0) { 555 serrno = errno; 556 (void)unlink(to_name); 557 errx(1, "%s: %s", from_name, strerror(serrno)); 558 } 559 } 560 } 561 } 562 563 /* 564 * strip -- 565 * use strip(1) to strip the target file 566 */ 567 void 568 strip(char *to_name) 569 { 570 int serrno, status; 571 char *stripprog; 572 573 switch (vfork()) { 574 case -1: 575 serrno = errno; 576 (void)unlink(to_name); 577 errx(1, "vfork: %s", strerror(serrno)); 578 case 0: 579 stripprog = getenv("STRIP"); 580 if (stripprog == NULL) 581 stripprog = _PATH_STRIP; 582 583 if (stripArgs) { 584 /* build up a command line and let /bin/sh parse the arguments */ 585 char* cmd = (char*)malloc(sizeof(char)* 586 (3+strlen(stripprog)+ 587 strlen(stripArgs)+ 588 strlen(to_name))); 589 590 if (cmd == NULL) 591 errx(1, "%s", strerror(ENOMEM)); 592 593 sprintf(cmd, "%s %s %s", stripprog, stripArgs, to_name); 594 595 execl(_PATH_BSHELL, "sh", "-c", cmd, NULL); 596 } else 597 execlp(stripprog, "strip", to_name, NULL); 598 599 warn("%s", stripprog); 600 _exit(1); 601 default: 602 if (wait(&status) == -1 || status) 603 (void)unlink(to_name); 604 } 605 } 606 607 /* 608 * backup file "to_name" to to_name.suffix 609 * if suffix contains a "%", it's taken as a printf(3) pattern 610 * used for a numbered backup. 611 */ 612 void 613 backup(const char *to_name) 614 { 615 char backup[FILENAME_MAX]; 616 617 if (numberedbackup) { 618 /* Do numbered backup */ 619 int cnt; 620 char suffix_expanded[FILENAME_MAX]; 621 622 cnt=0; 623 do { 624 (void)snprintf(suffix_expanded, FILENAME_MAX, suffix, cnt); 625 (void)snprintf(backup, FILENAME_MAX, "%s%s", 626 to_name, suffix_expanded); 627 cnt++; 628 } while (access(backup, F_OK)==0); 629 } else { 630 /* Do simple backup */ 631 (void)snprintf(backup, FILENAME_MAX, "%s%s", to_name, suffix); 632 } 633 634 (void)rename(to_name, backup); 635 } 636 637 /* 638 * install_dir -- 639 * build directory hierarchy 640 */ 641 void 642 install_dir(char *path) 643 { 644 char *p; 645 struct stat sb; 646 int ch; 647 648 for (p = path;; ++p) 649 if (!*p || (p != path && *p == '/')) { 650 ch = *p; 651 *p = '\0'; 652 if (stat(path, &sb)) { 653 if (errno != ENOENT || mkdir(path, 0777) < 0) { 654 err(1, "%s", path); 655 /* NOTREACHED */ 656 } 657 } 658 if (!(*p = ch)) 659 break; 660 } 661 662 if (((gid != -1 || uid != -1) && chown(path, uid, gid)) || 663 chmod(path, mode)) { 664 warn("%s", path); 665 } 666 } 667 668 /* 669 * usage -- 670 * print a usage message and die 671 */ 672 void 673 usage(void) 674 { 675 (void)fprintf(stderr, "\ 676 usage: install [-Ubcprs] [-B suffix] [-f flags] [-m mode] [-o owner] [-g group] [-l linkflags] [-S stripflags] file1 file2\n\ 677 install [-Ubcprs] [-B suffix] [-f flags] [-m mode] [-o owner] [-g group] [-l linkflags] [-S stripflags] file1 ... fileN directory\n\ 678 install [-Up] -d [-m mode] [-o owner] [-g group] directory ...\n"); 679 exit(1); 680 } 681
Indexes created Thu Sep 25 16:09:42 GMT 2025