xinstall.c revision 1.41
1 /* $NetBSD: xinstall.c,v 1.41 2000/07/27 03:57:50 cgd 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 1.41 2000/07/27 03:57:50 cgd 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 __P((int, char *, int, char *, off_t)); 95 void makelink __P((char *, char *)); 96 void install __P((char *, char *, u_long, u_int)); 97 void install_dir __P((char *)); 98 void strip __P((char *)); 99 void backup __P((const char *)); 100 void usage __P((void)); 101 int main __P((int, char *[])); 102 103 int 104 main(argc, argv) 105 int argc; 106 char *argv[]; 107 { 108 struct stat from_sb, to_sb; 109 mode_t *set; 110 u_long fset; 111 u_int iflags; 112 int ch, no_target; 113 char *p; 114 char *flags = NULL, *to_name, *group = NULL, *owner = NULL; 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 break; 187 case 'o': 188 owner = optarg; 189 break; 190 case 'p': 191 dopreserve = 1; 192 break; 193 case 'r': 194 dorename = 1; 195 break; 196 case 'S': 197 stripArgs = (char*)malloc(sizeof(char)*(strlen(optarg)+1)); 198 strcpy(stripArgs,optarg); 199 /* fall through; -S implies -s */ 200 case 's': 201 dostrip = 1; 202 break; 203 case 'U': 204 unpriv = 1; 205 break; 206 case '?': 207 default: 208 usage(); 209 } 210 argc -= optind; 211 argv += optind; 212 213 /* strip and link options make no sense when creating directories */ 214 if ((dostrip || dolink) && dodir) 215 usage(); 216 217 /* strip and flags make no sense with links */ 218 if ((dostrip || flags) && dolink) 219 usage(); 220 221 /* must have at least two arguments, except when creating directories */ 222 if (argc < 2 && !dodir) 223 usage(); 224 225 /* get group and owner id's */ 226 if (unpriv) 227 uid = gid = -1; 228 else { 229 if (group && !(gp = getgrnam(group)) && 230 !isdigit((unsigned char)*group)) 231 errx(1, "unknown group %s", group); 232 gid = (group) ? ((gp) ? gp->gr_gid : atoi(group)) : -1; 233 if (owner && !(pp = getpwnam(owner)) && 234 !isdigit((unsigned char)*owner)) 235 errx(1, "unknown user %s", owner); 236 uid = (owner) ? ((pp) ? pp->pw_uid : atoi(owner)) : -1; 237 } 238 239 if (dodir) { 240 for (; *argv != NULL; ++argv) 241 install_dir(*argv); 242 exit (0); 243 } 244 245 no_target = stat(to_name = argv[argc - 1], &to_sb); 246 if (!no_target && S_ISDIR(to_sb.st_mode)) { 247 for (; *argv != to_name; ++argv) 248 install(*argv, to_name, fset, iflags | DIRECTORY); 249 exit(0); 250 } 251 252 /* can't do file1 file2 directory/file */ 253 if (argc != 2) 254 usage(); 255 256 if (!no_target) { 257 if (stat(*argv, &from_sb)) 258 err(1, "%s", *argv); 259 if (!S_ISREG(to_sb.st_mode)) 260 errx(1, "%s: not a regular file", to_name); 261 if (!dolink && to_sb.st_dev == from_sb.st_dev && 262 to_sb.st_ino == from_sb.st_ino) 263 errx(1, "%s and %s are the same file", *argv, to_name); 264 /* 265 * Unlink now... avoid ETXTBSY errors later. Try and turn 266 * off the append/immutable bits -- if we fail, go ahead, 267 * it might work. 268 */ 269 #define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND) 270 if (to_sb.st_flags & NOCHANGEBITS) 271 (void)chflags(to_name, 272 to_sb.st_flags & ~(NOCHANGEBITS)); 273 if (dobackup) 274 backup(to_name); 275 else if (!dorename) 276 (void)unlink(to_name); 277 } 278 install(*argv, to_name, fset, iflags); 279 exit(0); 280 } 281 282 /* 283 * makelink -- 284 * make a link from source to destination 285 */ 286 void 287 makelink(from_name, to_name) 288 char *from_name; 289 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(from_name, to_name, fset, flags) 355 char *from_name, *to_name; 356 u_long fset; 357 u_int flags; 358 { 359 struct stat from_sb, to_sb; 360 int devnull, from_fd, to_fd, serrno; 361 char *p, tmpl[MAXPATHLEN], *oto_name; 362 363 /* If try to install NULL file to a directory, fails. */ 364 if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) { 365 if (stat(from_name, &from_sb)) 366 err(1, "%s", from_name); 367 if (!S_ISREG(from_sb.st_mode)) 368 errx(1, "%s: not a regular file", to_name); 369 /* Build the target path. */ 370 if (flags & DIRECTORY) { 371 (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s", 372 to_name, 373 (p = strrchr(from_name, '/')) ? ++p : from_name); 374 to_name = pathbuf; 375 } 376 devnull = 0; 377 } else { 378 from_sb.st_flags = 0; /* XXX */ 379 devnull = 1; 380 } 381 382 /* 383 * Unlink now... avoid ETXTBSY errors later. Try and turn 384 * off the append/immutable bits -- if we fail, go ahead, 385 * it might work. 386 */ 387 if (stat(to_name, &to_sb) == 0 && 388 to_sb.st_flags & (NOCHANGEBITS)) 389 (void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS)); 390 if (dorename) { 391 char *ptr, c, *dir; 392 393 if ((ptr = strrchr(to_name, '/')) != NULL) { 394 c = *++ptr; 395 *ptr = '\0'; 396 dir = to_name; 397 } else { 398 c = '\0'; /* pacify gcc */ 399 dir = tmpl; 400 *dir = '\0'; 401 } 402 (void)snprintf(tmpl, sizeof(tmpl), "%sinst.XXXXXX", dir); 403 if (ptr) 404 *ptr = c; 405 oto_name = to_name; 406 to_name = tmpl; 407 408 } else { 409 oto_name = NULL; /* pacify gcc */ 410 if (dobackup) 411 backup(to_name); 412 else 413 (void)unlink(to_name); 414 } 415 416 if (dolink) { 417 makelink(from_name, to_name); 418 return; 419 } 420 421 /* Create target. */ 422 if (dorename) { 423 if ((to_fd = mkstemp(to_name)) == -1) 424 err(1, "%s", to_name); 425 } else { 426 if ((to_fd = open(to_name, 427 O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0) 428 err(1, "%s", to_name); 429 } 430 if (!devnull) { 431 if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) { 432 (void)unlink(to_name); 433 err(1, "%s", from_name); 434 } 435 copy(from_fd, from_name, to_fd, to_name, from_sb.st_size); 436 (void)close(from_fd); 437 } 438 439 if (dostrip) { 440 strip(to_name); 441 442 /* 443 * Re-open our fd on the target, in case we used a strip 444 * that does not work in-place -- like gnu binutils strip. 445 */ 446 close(to_fd); 447 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 448 err(1, "stripping %s", to_name); 449 } 450 451 /* 452 * Set owner, group, mode for target; do the chown first, 453 * chown may lose the setuid bits. 454 */ 455 if ((gid != -1 || uid != -1) && fchown(to_fd, uid, gid)) { 456 serrno = errno; 457 (void)unlink(to_name); 458 errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno)); 459 } 460 if (fchmod(to_fd, mode)) { 461 serrno = errno; 462 (void)unlink(to_name); 463 errx(1, "%s: chmod: %s", to_name, strerror(serrno)); 464 } 465 466 /* 467 * If provided a set of flags, set them, otherwise, preserve the 468 * flags, except for the dump flag. 469 */ 470 if (fchflags(to_fd, 471 flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) { 472 if (errno != EOPNOTSUPP || (from_sb.st_flags & ~UF_NODUMP) != 0) 473 warn("%s: chflags", to_name); 474 } 475 476 /* 477 * Preserve the date of the source file. 478 */ 479 if (dopreserve) { 480 struct timeval tv[2]; 481 482 #ifdef BSD4_4 483 TIMESPEC_TO_TIMEVAL(&tv[0], &from_sb.st_atimespec); 484 TIMESPEC_TO_TIMEVAL(&tv[1], &from_sb.st_mtimespec); 485 #else 486 tv[0].tv_sec = from_sb.st_atime; 487 tv[0].tv_usec = 0; 488 tv[1].tv_sec = from_sb.st_mtime; 489 tv[1].tv_usec = 0; 490 #endif 491 if (futimes(to_fd, tv) == -1) 492 warn("%s: futimes", to_name); 493 } 494 495 (void)close(to_fd); 496 497 if (dorename) 498 if (rename(to_name, oto_name) == -1) 499 err(1, "%s: rename", to_name); 500 501 if (!docopy && !devnull && unlink(from_name)) 502 err(1, "%s", from_name); 503 } 504 505 /* 506 * copy -- 507 * copy from one file to another 508 */ 509 void 510 copy(from_fd, from_name, to_fd, to_name, size) 511 int from_fd, to_fd; 512 char *from_name, *to_name; 513 off_t size; 514 { 515 ssize_t nr, nw; 516 int serrno; 517 char *p; 518 char buf[MAXBSIZE]; 519 520 /* 521 * There's no reason to do anything other than close the file 522 * now if it's empty, so let's not bother. 523 */ 524 if (size > 0) { 525 /* 526 * Mmap and write if less than 8M (the limit is so we don't totally 527 * trash memory on big files). This is really a minor hack, but it 528 * wins some CPU back. 529 */ 530 if (size <= 8 * 1048576) { 531 if ((p = mmap(NULL, (size_t)size, PROT_READ, 532 MAP_FILE|MAP_SHARED, from_fd, (off_t)0)) == MAP_FAILED) { 533 serrno = errno; 534 (void)unlink(to_name); 535 errx(1, "%s: %s", from_name, strerror(serrno)); 536 } 537 if (madvise(p, (size_t)size, MADV_SEQUENTIAL) == -1 538 && errno != EOPNOTSUPP) 539 warnx("madvise: %s", strerror(errno)); 540 541 if (write(to_fd, p, size) != size) { 542 serrno = errno; 543 (void)unlink(to_name); 544 errx(1, "%s: %s", 545 to_name, strerror(serrno)); 546 } 547 } else { 548 while ((nr = read(from_fd, buf, sizeof(buf))) > 0) { 549 if ((nw = write(to_fd, buf, nr)) != nr) { 550 serrno = errno; 551 (void)unlink(to_name); 552 errx(1, "%s: %s", 553 to_name, strerror(nw > 0 ? EIO : serrno)); 554 } 555 } 556 if (nr != 0) { 557 serrno = errno; 558 (void)unlink(to_name); 559 errx(1, "%s: %s", from_name, strerror(serrno)); 560 } 561 } 562 } 563 } 564 565 /* 566 * strip -- 567 * use strip(1) to strip the target file 568 */ 569 void 570 strip(to_name) 571 char *to_name; 572 { 573 int serrno, status; 574 char *stripprog; 575 576 switch (vfork()) { 577 case -1: 578 serrno = errno; 579 (void)unlink(to_name); 580 errx(1, "vfork: %s", strerror(serrno)); 581 case 0: 582 stripprog = getenv("STRIP"); 583 if (stripprog == NULL) 584 stripprog = _PATH_STRIP; 585 586 if (stripArgs) { 587 /* build up a command line and let /bin/sh parse the arguments */ 588 char* cmd = (char*)malloc(sizeof(char)* 589 (3+strlen(stripprog)+ 590 strlen(stripArgs)+ 591 strlen(to_name))); 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(to_name) 614 const char *to_name; 615 { 616 char backup[FILENAME_MAX]; 617 618 if (numberedbackup) { 619 /* Do numbered backup */ 620 int cnt; 621 char suffix_expanded[FILENAME_MAX]; 622 623 cnt=0; 624 do { 625 (void)snprintf(suffix_expanded, FILENAME_MAX, suffix, cnt); 626 (void)snprintf(backup, FILENAME_MAX, "%s%s", 627 to_name, suffix_expanded); 628 cnt++; 629 } while (access(backup, F_OK)==0); 630 } else { 631 /* Do simple backup */ 632 (void)snprintf(backup, FILENAME_MAX, "%s%s", to_name, suffix); 633 } 634 635 (void)rename(to_name, backup); 636 } 637 638 /* 639 * install_dir -- 640 * build directory heirarchy 641 */ 642 void 643 install_dir(path) 644 char *path; 645 { 646 char *p; 647 struct stat sb; 648 int ch; 649 650 for (p = path;; ++p) 651 if (!*p || (p != path && *p == '/')) { 652 ch = *p; 653 *p = '\0'; 654 if (stat(path, &sb)) { 655 if (errno != ENOENT || mkdir(path, 0777) < 0) { 656 err(1, "%s", path); 657 /* NOTREACHED */ 658 } 659 } 660 if (!(*p = ch)) 661 break; 662 } 663 664 if (((gid != -1 || uid != -1) && chown(path, uid, gid)) || 665 chmod(path, mode)) { 666 warn("%s", path); 667 } 668 } 669 670 /* 671 * usage -- 672 * print a usage message and die 673 */ 674 void 675 usage() 676 { 677 (void)fprintf(stderr, "\ 678 usage: install [-Ubcps] [-B suffix] [-f flags] [-m mode] [-o owner] [-g group] [-l linkflags] [-S stripflags] file1 file2\n\ 679 install [-Ubcps] [-B suffix] [-f flags] [-m mode] [-o owner] [-g group] [-l linkflags] [-S stripflags] file1 ... fileN directory\n\ 680 install [-Up] -d [-m mode] [-o owner] [-g group] directory ...\n"); 681 exit(1); 682 } 683
Indexes created Fri Sep 26 08:10:20 GMT 2025