xinstall.c revision 1.37
1 /* $NetBSD: xinstall.c,v 1.37 1999/07/06 14:45:31 christos 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 1.37 1999/07/06 14:45:31 christos 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; 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:")) != -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 '?': 204 default: 205 usage(); 206 } 207 argc -= optind; 208 argv += optind; 209 210 /* strip and link options make no sense when creating directories */ 211 if ((dostrip || dolink) && dodir) 212 usage(); 213 214 /* strip and flags make no sense with links */ 215 if ((dostrip || flags) && dolink) 216 usage(); 217 218 /* must have at least two arguments, except when creating directories */ 219 if (argc < 2 && !dodir) 220 usage(); 221 222 /* get group and owner id's */ 223 if (group && !(gp = getgrnam(group)) && !isdigit((unsigned char)*group)) 224 errx(1, "unknown group %s", group); 225 gid = (group) ? ((gp) ? gp->gr_gid : atoi(group)) : -1; 226 if (owner && !(pp = getpwnam(owner)) && !isdigit((unsigned char)*owner)) 227 errx(1, "unknown user %s", owner); 228 uid = (owner) ? ((pp) ? pp->pw_uid : atoi(owner)) : -1; 229 230 if (dodir) { 231 for (; *argv != NULL; ++argv) 232 install_dir(*argv); 233 exit (0); 234 } 235 236 no_target = stat(to_name = argv[argc - 1], &to_sb); 237 if (!no_target && S_ISDIR(to_sb.st_mode)) { 238 for (; *argv != to_name; ++argv) 239 install(*argv, to_name, fset, iflags | DIRECTORY); 240 exit(0); 241 } 242 243 /* can't do file1 file2 directory/file */ 244 if (argc != 2) 245 usage(); 246 247 if (!no_target) { 248 if (stat(*argv, &from_sb)) 249 err(1, "%s", *argv); 250 if (!S_ISREG(to_sb.st_mode)) 251 errx(1, "%s: %s", to_name, strerror(EFTYPE)); 252 if (!dolink && to_sb.st_dev == from_sb.st_dev && 253 to_sb.st_ino == from_sb.st_ino) 254 errx(1, "%s and %s are the same file", *argv, to_name); 255 /* 256 * Unlink now... avoid ETXTBSY errors later. Try and turn 257 * off the append/immutable bits -- if we fail, go ahead, 258 * it might work. 259 */ 260 #define NOCHANGEBITS (UF_IMMUTABLE | UF_APPEND | SF_IMMUTABLE | SF_APPEND) 261 if (to_sb.st_flags & NOCHANGEBITS) 262 (void)chflags(to_name, 263 to_sb.st_flags & ~(NOCHANGEBITS)); 264 if (dobackup) 265 backup(to_name); 266 else if (!dorename) 267 (void)unlink(to_name); 268 } 269 install(*argv, to_name, fset, iflags); 270 exit(0); 271 } 272 273 /* 274 * makelink -- 275 * make a link from source to destination 276 */ 277 void 278 makelink(from_name, to_name) 279 char *from_name; 280 char *to_name; 281 { 282 char src[MAXPATHLEN], dst[MAXPATHLEN], lnk[MAXPATHLEN]; 283 284 /* Try hard links first */ 285 if (dolink & (LN_HARD|LN_MIXED)) { 286 if (link(from_name, to_name) == -1) { 287 if ((dolink & LN_HARD) || errno != EXDEV) 288 err(1, "link %s -> %s", from_name, to_name); 289 } 290 else 291 return; 292 } 293 294 /* Symbolic links */ 295 if (dolink & LN_ABSOLUTE) { 296 /* Convert source path to absolute */ 297 if (realpath(from_name, src) == NULL) 298 err(1, "%s", src); 299 if (symlink(src, to_name) == -1) 300 err(1, "symlink %s -> %s", src, to_name); 301 return; 302 } 303 304 if (dolink & LN_RELATIVE) { 305 char *s, *d; 306 307 /* Resolve pathnames */ 308 if (realpath(from_name, src) == NULL) 309 err(1, "%s", src); 310 if (realpath(to_name, dst) == NULL) 311 err(1, "%s", dst); 312 313 /* trim common path components */ 314 for (s = src, d = dst; *s == *d; s++, d++) 315 continue; 316 while (*s != '/') 317 s--, d--; 318 319 /* count the number of directories we need to backtrack */ 320 for (++d, lnk[0] = '\0'; *d; d++) 321 if (*d == '/') 322 (void) strcat(lnk, "../"); 323 324 (void) strcat(lnk, ++s); 325 326 if (symlink(lnk, dst) == -1) 327 err(1, "symlink %s -> %s", lnk, dst); 328 return; 329 } 330 331 /* 332 * If absolute or relative was not specified, 333 * try the names the user provided 334 */ 335 if (symlink(from_name, to_name) == -1) 336 err(1, "symlink %s -> %s", from_name, to_name); 337 338 } 339 340 /* 341 * install -- 342 * build a path name and install the file 343 */ 344 void 345 install(from_name, to_name, fset, flags) 346 char *from_name, *to_name; 347 u_long fset; 348 u_int flags; 349 { 350 struct stat from_sb, to_sb; 351 int devnull, from_fd, to_fd, serrno; 352 char *p, tmpl[MAXPATHLEN], *oto_name; 353 354 /* If try to install NULL file to a directory, fails. */ 355 if (flags & DIRECTORY || strcmp(from_name, _PATH_DEVNULL)) { 356 if (stat(from_name, &from_sb)) 357 err(1, "%s", from_name); 358 if (!S_ISREG(from_sb.st_mode)) 359 errx(1, "%s: %s", from_name, strerror(EFTYPE)); 360 /* Build the target path. */ 361 if (flags & DIRECTORY) { 362 (void)snprintf(pathbuf, sizeof(pathbuf), "%s/%s", 363 to_name, 364 (p = strrchr(from_name, '/')) ? ++p : from_name); 365 to_name = pathbuf; 366 } 367 devnull = 0; 368 } else { 369 from_sb.st_flags = 0; /* XXX */ 370 devnull = 1; 371 } 372 373 /* 374 * Unlink now... avoid ETXTBSY errors later. Try and turn 375 * off the append/immutable bits -- if we fail, go ahead, 376 * it might work. 377 */ 378 if (stat(to_name, &to_sb) == 0 && 379 to_sb.st_flags & (NOCHANGEBITS)) 380 (void)chflags(to_name, to_sb.st_flags & ~(NOCHANGEBITS)); 381 if (dorename) { 382 char *ptr, c, *dir; 383 384 if ((ptr = strrchr(to_name, '/')) != NULL) { 385 c = *++ptr; 386 *ptr = '\0'; 387 dir = to_name; 388 } else { 389 c = '\0'; /* pacify gcc */ 390 dir = tmpl; 391 *dir = '\0'; 392 } 393 (void)snprintf(tmpl, sizeof(tmpl), "%sinst.XXXXXX", dir); 394 if (ptr) 395 *ptr = c; 396 oto_name = to_name; 397 to_name = tmpl; 398 399 } else { 400 oto_name = NULL; /* pacify gcc */ 401 if (dobackup) 402 backup(to_name); 403 else 404 (void)unlink(to_name); 405 } 406 407 if (dolink) { 408 makelink(from_name, to_name); 409 return; 410 } 411 412 /* Create target. */ 413 if (dorename) { 414 if ((to_fd = mkstemp(to_name)) == -1) 415 err(1, "%s", to_name); 416 } else { 417 if ((to_fd = open(to_name, 418 O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR)) < 0) 419 err(1, "%s", to_name); 420 } 421 if (!devnull) { 422 if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) { 423 (void)unlink(to_name); 424 err(1, "%s", from_name); 425 } 426 copy(from_fd, from_name, to_fd, to_name, from_sb.st_size); 427 (void)close(from_fd); 428 } 429 430 if (dostrip) { 431 strip(to_name); 432 433 /* 434 * Re-open our fd on the target, in case we used a strip 435 * that does not work in-place -- like gnu binutils strip. 436 */ 437 close(to_fd); 438 if ((to_fd = open(to_name, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) 439 err(1, "stripping %s", to_name); 440 } 441 442 /* 443 * Set owner, group, mode for target; do the chown first, 444 * chown may lose the setuid bits. 445 */ 446 if ((gid != -1 || uid != -1) && fchown(to_fd, uid, gid)) { 447 serrno = errno; 448 (void)unlink(to_name); 449 errx(1, "%s: chown/chgrp: %s", to_name, strerror(serrno)); 450 } 451 if (fchmod(to_fd, mode)) { 452 serrno = errno; 453 (void)unlink(to_name); 454 errx(1, "%s: chmod: %s", to_name, strerror(serrno)); 455 } 456 457 /* 458 * If provided a set of flags, set them, otherwise, preserve the 459 * flags, except for the dump flag. 460 */ 461 if (fchflags(to_fd, 462 flags & SETFLAGS ? fset : from_sb.st_flags & ~UF_NODUMP)) { 463 if (errno != EOPNOTSUPP || (from_sb.st_flags & ~UF_NODUMP) != 0) 464 warn("%s: chflags", to_name); 465 } 466 467 /* 468 * Preserve the date of the source file. 469 */ 470 if (dopreserve) { 471 struct timeval tv[2]; 472 473 #ifdef BSD4_4 474 TIMESPEC_TO_TIMEVAL(&tv[0], &from_sb.st_atimespec); 475 TIMESPEC_TO_TIMEVAL(&tv[1], &from_sb.st_mtimespec); 476 #else 477 tv[0].tv_sec = from_sb.st_atime; 478 tv[0].tv_usec = 0; 479 tv[1].tv_sec = from_sb.st_mtime; 480 tv[1].tv_usec = 0; 481 #endif 482 if (futimes(to_fd, tv) == -1) 483 warn("%s: futimes", to_name); 484 } 485 486 (void)close(to_fd); 487 488 if (dorename) 489 if (rename(to_name, oto_name) == -1) 490 err(1, "%s: rename", to_name); 491 492 if (!docopy && !devnull && unlink(from_name)) 493 err(1, "%s", from_name); 494 } 495 496 /* 497 * copy -- 498 * copy from one file to another 499 */ 500 void 501 copy(from_fd, from_name, to_fd, to_name, size) 502 int from_fd, to_fd; 503 char *from_name, *to_name; 504 off_t size; 505 { 506 ssize_t nr, nw; 507 int serrno; 508 char *p; 509 char buf[MAXBSIZE]; 510 511 /* 512 * There's no reason to do anything other than close the file 513 * now if it's empty, so let's not bother. 514 */ 515 if (size > 0) { 516 /* 517 * Mmap and write if less than 8M (the limit is so we don't totally 518 * trash memory on big files). This is really a minor hack, but it 519 * wins some CPU back. 520 */ 521 if (size <= 8 * 1048576) { 522 if ((p = mmap(NULL, (size_t)size, PROT_READ, 523 MAP_FILE|MAP_SHARED, from_fd, (off_t)0)) == MAP_FAILED) { 524 serrno = errno; 525 (void)unlink(to_name); 526 errx(1, "%s: %s", from_name, strerror(serrno)); 527 } 528 if (madvise(p, (size_t)size, MADV_SEQUENTIAL) == -1) { 529 serrno = errno; 530 (void)unlink(to_name); 531 errx(1, "madvise: %s", strerror(serrno)); 532 } 533 if (write(to_fd, p, size) != size) { 534 serrno = errno; 535 (void)unlink(to_name); 536 errx(1, "%s: %s", 537 to_name, strerror(serrno)); 538 } 539 } else { 540 while ((nr = read(from_fd, buf, sizeof(buf))) > 0) { 541 if ((nw = write(to_fd, buf, nr)) != nr) { 542 serrno = errno; 543 (void)unlink(to_name); 544 errx(1, "%s: %s", 545 to_name, strerror(nw > 0 ? EIO : serrno)); 546 } 547 } 548 if (nr != 0) { 549 serrno = errno; 550 (void)unlink(to_name); 551 errx(1, "%s: %s", from_name, strerror(serrno)); 552 } 553 } 554 } 555 } 556 557 /* 558 * strip -- 559 * use strip(1) to strip the target file 560 */ 561 void 562 strip(to_name) 563 char *to_name; 564 { 565 int serrno, status; 566 char *stripprog; 567 568 switch (vfork()) { 569 case -1: 570 serrno = errno; 571 (void)unlink(to_name); 572 errx(1, "vfork: %s", strerror(serrno)); 573 case 0: 574 stripprog = getenv("STRIP"); 575 if (stripprog == NULL) 576 stripprog = _PATH_STRIP; 577 578 if (stripArgs) { 579 /* build up a command line and let /bin/sh parse the arguments */ 580 char* cmd = (char*)malloc(sizeof(char)* 581 (3+strlen(stripprog)+ 582 strlen(stripArgs)+ 583 strlen(to_name))); 584 585 sprintf(cmd, "%s %s %s", stripprog, stripArgs, to_name); 586 587 execl(_PATH_BSHELL, "sh", "-c", cmd, NULL); 588 } else 589 execl(stripprog, "strip", to_name, NULL); 590 591 warn("%s", stripprog); 592 _exit(1); 593 default: 594 if (wait(&status) == -1 || status) 595 (void)unlink(to_name); 596 } 597 } 598 599 /* 600 * backup file "to_name" to to_name.suffix 601 * if suffix contains a "%", it's taken as a printf(3) pattern 602 * used for a numbered backup. 603 */ 604 void 605 backup(to_name) 606 const char *to_name; 607 { 608 char backup[FILENAME_MAX]; 609 610 if (numberedbackup) { 611 /* Do numbered backup */ 612 int cnt; 613 char suffix_expanded[FILENAME_MAX]; 614 615 cnt=0; 616 do { 617 (void)snprintf(suffix_expanded, FILENAME_MAX, suffix, cnt); 618 (void)snprintf(backup, FILENAME_MAX, "%s%s", 619 to_name, suffix_expanded); 620 cnt++; 621 } while (access(backup, F_OK)==0); 622 } else { 623 /* Do simple backup */ 624 (void)snprintf(backup, FILENAME_MAX, "%s%s", to_name, suffix); 625 } 626 627 (void)rename(to_name, backup); 628 } 629 630 /* 631 * install_dir -- 632 * build directory heirarchy 633 */ 634 void 635 install_dir(path) 636 char *path; 637 { 638 char *p; 639 struct stat sb; 640 int ch; 641 642 for (p = path;; ++p) 643 if (!*p || (p != path && *p == '/')) { 644 ch = *p; 645 *p = '\0'; 646 if (stat(path, &sb)) { 647 if (errno != ENOENT || mkdir(path, 0777) < 0) { 648 err(1, "%s", path); 649 /* NOTREACHED */ 650 } 651 } 652 if (!(*p = ch)) 653 break; 654 } 655 656 if (((gid != -1 || uid != -1) && chown(path, uid, gid)) || 657 chmod(path, mode)) { 658 warn("%s", path); 659 } 660 } 661 662 /* 663 * usage -- 664 * print a usage message and die 665 */ 666 void 667 usage() 668 { 669 (void)fprintf(stderr, "\ 670 usage: install [-bcps] [-B suffix] [-f flags] [-m mode] [-o owner] [-g group] [-l linkflags] [-S stripflags] file1 file2\n\ 671 install [-bcps] [-B suffix] [-f flags] [-m mode] [-o owner] [-g group] [-l linkflags] [-S stripflags] file1 ... fileN directory\n\ 672 install -pd [-m mode] [-o owner] [-g group] directory ...\n"); 673 exit(1); 674 } 675
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