xinstall.c revision 1.48
1 /* $NetBSD: xinstall.c,v 1.48 2001/09/15 14:55:38 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 1.48 2001/09/15 14:55:38 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 = (char*)malloc(sizeof(char)*(strlen(optarg)+1)); 199 strcpy(stripArgs,optarg); 200 /* fall through; -S implies -s */ 201 case 's': 202 dostrip = 1; 203 break; 204 case 'U': 205 unpriv = 1; 206 break; 207 case '?': 208 default: 209 usage(); 210 } 211 argc -= optind; 212 argv += optind; 213 214 /* strip and link options make no sense when creating directories */ 215 if ((dostrip || dolink) && dodir) 216 usage(); 217 218 /* strip and flags make no sense with links */ 219 if ((dostrip || flags) && dolink) 220 usage(); 221 222 /* must have at least two arguments, except when creating directories */ 223 if (argc < 2 && !dodir) 224 usage(); 225 226 /* get group and owner id's */ 227 if (unpriv) 228 uid = gid = -1; 229 else { 230 if (group && !(gp = getgrnam(group)) && 231 !isdigit((unsigned char)*group)) 232 errx(1, "unknown group %s", group); 233 gid = (group) ? ((gp) ? gp->gr_gid : atoi(group)) : -1; 234 if (owner && !(pp = getpwnam(owner)) && 235 !isdigit((unsigned char)*owner)) 236 errx(1, "unknown user %s", owner); 237 uid = (owner) ? ((pp) ? pp->pw_uid : atoi(owner)) : -1; 238 } 239 240 if (dodir) { 241 for (; *argv != NULL; ++argv) 242 install_dir(*argv); 243 exit (0); 244 } 245 246 no_target = stat(to_name = argv[argc - 1], &to_sb); 247 if (!no_target && S_ISDIR(to_sb.st_mode)) { 248 for (; *argv != to_name; ++argv) 249 install(*argv, to_name, fset, iflags | DIRECTORY); 250 exit(0); 251 } 252 253 /* can't do file1 file2 directory/file */ 254 if (argc != 2) 255 usage(); 256 257 if (!no_target) { 258 if (stat(*argv, &from_sb)) 259 err(1, "%s", *argv); 260 if (!S_ISREG(to_sb.st_mode)) 261 errx(1, "%s: not a regular file", to_name); 262 if (!dolink && to_sb.st_dev == from_sb.st_dev && 263 to_sb.st_ino == from_sb.st_ino) 264 errx(1, "%s and %s are the same file", *argv, to_name); 265 /* 266 * Unlink now... avoid ETXTBSY errors later. Try and turn 267 * off the append/immutable bits -- if we fail, go ahead, 268 * it might work. 269 */ 270 #define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND) 271 if (to_sb.st_flags & NOCHANGEBITS) 272 (void)chflags(to_name, 273 to_sb.st_flags & ~(NOCHANGEBITS)); 274 if (dobackup) 275 backup(to_name); 276 else if (!dorename) 277 (void)unlink(to_name); 278 } 279 install(*argv, to_name, fset, iflags); 280 exit(0); 281 } 282 283 /* 284 * makelink -- 285 * make a link from source to destination 286 */ 287 void 288 makelink(char *from_name, char *to_name) 289 { 290 char src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN]; 291 292 /* Try hard links first */ 293 if (dolink & (LN_HARD|LN_MIXED)) { 294 if (link(from_name, to_name) == -1) { 295 if ((dolink & LN_HARD) || errno != EXDEV) 296 err(1, "link %s -> %s", from_name, to_name); 297 } 298 else 299 return; 300 } 301 302 /* Symbolic links */ 303 if (dolink & LN_ABSOLUTE) { 304 /* Convert source path to absolute */ 305 if (realpath(from_name, src) == NULL) 306 err(1, "%s", src); 307 if (symlink(src, to_name) == -1) 308 err(1, "symlink %s -> %s", src, to_name); 309 return; 310 } 311 312 if (dolink & LN_RELATIVE) { 313 char *s, *d; 314 315 /* Resolve pathnames */ 316 if (realpath(from_name, src) == NULL) 317 err(1, "%s", src); 318 if (realpath(to_name, dst) == NULL) 319 err(1, "%s", dst); 320 321 /* trim common path components */ 322 for (s = src, d = dst; *s == *d; s++, d++) 323 continue; 324 while (*s != '/') 325 s--, d--; 326 327 /* count the number of directories we need to backtrack */ 328 for (++d, lnk[0] = '\0'; *d; d++) 329 if (*d == '/') 330 (void) strcat(lnk, "../"); 331 332 (void) strcat(lnk, ++s); 333 334 if (symlink(lnk, dst) == -1) 335 err(1, "symlink %s -> %s", lnk, dst); 336 return; 337 } 338 339 /* 340 * If absolute or relative was not specified, 341 * try the names the user provided 342 */ 343 if (symlink(from_name, to_name) == -1) 344 err(1, "symlink %s -> %s", from_name, to_name); 345 346 } 347 348 /* 349 * install -- 350 * build a path name and install the file 351 */ 352 void 353 install(char *from_name, char *to_name, u_long fset, u_int flags) 354 { 355 struct stat from_sb, to_sb; 356 int devnull, from_fd, to_fd, serrno; 357 char *p, tmpl[MAXPATHLEN], *oto_name; 358 359 /* If try to install NULL file to a directory, fails. */ 360 if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) { 361 if (stat(from_name, &from_sb)) 362 err(1, "%s", from_name); 363 if (!S_ISREG(from_sb.st_mode)) 364 errx(1, "%s: not a regular file", to_name); 365 /* Build the target path. */ 366 if (flags & DIRECTORY) { 367 (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s", 368 to_name, 369 (p = strrchr(from_name, '/')) ? ++p : from_name); 370 to_name = pathbuf; 371 } 372 devnull = 0; 373 } else { 374 from_sb.st_flags = 0; /* XXX */ 375 devnull = 1; 376 } 377 378 /* 379 * Unlink now... avoid ETXTBSY errors later. Try and turn 380 * off the append/immutable bits -- if we fail, go ahead, 381 * it might work. 382 */ 383 if (stat(to_name, &to_sb) == 0 && 384 to_sb.st_flags & (NOCHANGEBITS)) 385 (void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS)); 386 if (dorename) { 387 char *ptr, c, *dir; 388 389 if ((ptr = strrchr(to_name, '/')) != NULL) { 390 c = *++ptr; 391 *ptr = '\0'; 392 dir = to_name; 393 } else { 394 c = '\0'; /* pacify gcc */ 395 dir = tmpl; 396 *dir = '\0'; 397 } 398 (void)snprintf(tmpl, sizeof(tmpl), "%sinst.XXXXXX", dir); 399 if (ptr) 400 *ptr = c; 401 oto_name = to_name; 402 to_name = tmpl; 403 404 } else { 405 oto_name = NULL; /* pacify gcc */ 406 if (dobackup) 407 backup(to_name); 408 else 409 (void)unlink(to_name); 410 } 411 412 if (dolink) { 413 makelink(from_name, to_name); 414 return; 415 } 416 417 /* Create target. */ 418 if (dorename) { 419 if ((to_fd = mkstemp(to_name)) == -1) 420 err(1, "%s", to_name); 421 } else { 422 if ((to_fd = open(to_name, 423 O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0) 424 err(1, "%s", to_name); 425 } 426 if (!devnull) { 427 if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) { 428 (void)unlink(to_name); 429 err(1, "%s", from_name); 430 } 431 copy(from_fd, from_name, to_fd, to_name, from_sb.st_size); 432 (void)close(from_fd); 433 } 434 435 if (dostrip) { 436 strip(to_name); 437 438 /* 439 * Re-open our fd on the target, in case we used a strip 440 * that does not work in-place -- like gnu binutils strip. 441 */ 442 close(to_fd); 443 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 444 err(1, "stripping %s", to_name); 445 } 446 447 /* 448 * Set owner, group, mode for target; do the chown first, 449 * chown may lose the setuid bits. 450 */ 451 if ((gid != -1 || uid != -1) && fchown(to_fd, uid, gid)) { 452 serrno = errno; 453 (void)unlink(to_name); 454 errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno)); 455 } 456 if (fchmod(to_fd, mode)) { 457 serrno = errno; 458 (void)unlink(to_name); 459 errx(1, "%s: chmod: %s", to_name, strerror(serrno)); 460 } 461 462 /* 463 * If provided a set of flags, set them, otherwise, preserve the 464 * flags, except for the dump flag. 465 */ 466 if (fchflags(to_fd, 467 flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) { 468 if (errno != EOPNOTSUPP || (from_sb.st_flags & ~UF_NODUMP) != 0) 469 warn("%s: chflags", to_name); 470 } 471 472 /* 473 * Preserve the date of the source file. 474 */ 475 if (dopreserve) { 476 struct timeval tv[2]; 477 478 #ifdef BSD4_4 479 TIMESPEC_TO_TIMEVAL(&tv[0], &from_sb.st_atimespec); 480 TIMESPEC_TO_TIMEVAL(&tv[1], &from_sb.st_mtimespec); 481 #else 482 tv[0].tv_sec = from_sb.st_atime; 483 tv[0].tv_usec = 0; 484 tv[1].tv_sec = from_sb.st_mtime; 485 tv[1].tv_usec = 0; 486 #endif 487 if (futimes(to_fd, tv) == -1) 488 warn("%s: futimes", to_name); 489 } 490 491 (void)close(to_fd); 492 493 if (dorename) 494 if (rename(to_name, oto_name) == -1) 495 err(1, "%s: rename", to_name); 496 497 if (!docopy && !devnull && unlink(from_name)) 498 err(1, "%s", from_name); 499 } 500 501 /* 502 * copy -- 503 * copy from one file to another 504 */ 505 void 506 copy(int from_fd, char *from_name, int to_fd, char *to_name, off_t size) 507 { 508 ssize_t nr, nw; 509 int serrno; 510 char *p; 511 char buf[MAXBSIZE]; 512 513 /* 514 * There's no reason to do anything other than close the file 515 * now if it's empty, so let's not bother. 516 */ 517 if (size > 0) { 518 519 /* 520 * Mmap and write if less than 8M (the limit is so we 521 * don't totally trash memory on big files). This is 522 * really a minor hack, but it wins some CPU back. 523 */ 524 525 if (size <= 8 * 1048576) { 526 if ((p = mmap(NULL, (size_t)size, PROT_READ, 527 MAP_FILE|MAP_SHARED, from_fd, (off_t)0)) 528 == MAP_FAILED) { 529 goto mmap_failed; 530 } 531 #ifdef MADV_SEQUENTIAL 532 if (madvise(p, (size_t)size, MADV_SEQUENTIAL) == -1 533 && errno != EOPNOTSUPP) 534 warnx("madvise: %s", strerror(errno)); 535 #endif 536 537 if (write(to_fd, p, size) != size) { 538 serrno = errno; 539 (void)unlink(to_name); 540 errx(1, "%s: %s", 541 to_name, strerror(serrno)); 542 } 543 } else { 544 mmap_failed: 545 while ((nr = read(from_fd, buf, sizeof(buf))) > 0) { 546 if ((nw = write(to_fd, buf, nr)) != nr) { 547 serrno = errno; 548 (void)unlink(to_name); 549 errx(1, "%s: %s", to_name, 550 strerror(nw > 0 ? EIO : serrno)); 551 } 552 } 553 if (nr != 0) { 554 serrno = errno; 555 (void)unlink(to_name); 556 errx(1, "%s: %s", from_name, strerror(serrno)); 557 } 558 } 559 } 560 } 561 562 /* 563 * strip -- 564 * use strip(1) to strip the target file 565 */ 566 void 567 strip(char *to_name) 568 { 569 int serrno, status; 570 char *stripprog; 571 572 switch (vfork()) { 573 case -1: 574 serrno = errno; 575 (void)unlink(to_name); 576 errx(1, "vfork: %s", strerror(serrno)); 577 case 0: 578 stripprog = getenv("STRIP"); 579 if (stripprog == NULL) 580 stripprog = _PATH_STRIP; 581 582 if (stripArgs) { 583 /* build up a command line and let /bin/sh parse the arguments */ 584 char* cmd = (char*)malloc(sizeof(char)* 585 (3+strlen(stripprog)+ 586 strlen(stripArgs)+ 587 strlen(to_name))); 588 589 sprintf(cmd, "%s %s %s", stripprog, stripArgs, to_name); 590 591 execl(_PATH_BSHELL, "sh", "-c", cmd, NULL); 592 } else 593 execlp(stripprog, "strip", to_name, NULL); 594 595 warn("%s", stripprog); 596 _exit(1); 597 default: 598 if (wait(&status) == -1 || status) 599 (void)unlink(to_name); 600 } 601 } 602 603 /* 604 * backup file "to_name" to to_name.suffix 605 * if suffix contains a "%", it's taken as a printf(3) pattern 606 * used for a numbered backup. 607 */ 608 void 609 backup(const char *to_name) 610 { 611 char backup[FILENAME_MAX]; 612 613 if (numberedbackup) { 614 /* Do numbered backup */ 615 int cnt; 616 char suffix_expanded[FILENAME_MAX]; 617 618 cnt=0; 619 do { 620 (void)snprintf(suffix_expanded, FILENAME_MAX, suffix, cnt); 621 (void)snprintf(backup, FILENAME_MAX, "%s%s", 622 to_name, suffix_expanded); 623 cnt++; 624 } while (access(backup, F_OK)==0); 625 } else { 626 /* Do simple backup */ 627 (void)snprintf(backup, FILENAME_MAX, "%s%s", to_name, suffix); 628 } 629 630 (void)rename(to_name, backup); 631 } 632 633 /* 634 * install_dir -- 635 * build directory hierarchy 636 */ 637 void 638 install_dir(char *path) 639 { 640 char *p; 641 struct stat sb; 642 int ch; 643 644 for (p = path;; ++p) 645 if (!*p || (p != path && *p == '/')) { 646 ch = *p; 647 *p = '\0'; 648 if (stat(path, &sb)) { 649 if (errno != ENOENT || mkdir(path, 0777) < 0) { 650 err(1, "%s", path); 651 /* NOTREACHED */ 652 } 653 } 654 if (!(*p = ch)) 655 break; 656 } 657 658 if (((gid != -1 || uid != -1) && chown(path, uid, gid)) || 659 chmod(path, mode)) { 660 warn("%s", path); 661 } 662 } 663 664 /* 665 * usage -- 666 * print a usage message and die 667 */ 668 void 669 usage(void) 670 { 671 (void)fprintf(stderr, "\ 672 usage: install [-Ubcprs] [-B suffix] [-f flags] [-m mode] [-o owner] [-g group] [-l linkflags] [-S stripflags] file1 file2\n\ 673 install [-Ubcprs] [-B suffix] [-f flags] [-m mode] [-o owner] [-g group] [-l linkflags] [-S stripflags] file1 ... fileN directory\n\ 674 install [-Up] -d [-m mode] [-o owner] [-g group] directory ...\n"); 675 exit(1); 676 } 677
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