1 /*- 2 * Copyright (c) 1980, 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1980, 1989, 1993, 1994 The Regents of the University of California. All rights reserved. 34 * @(#)mount.c 8.25 (Berkeley) 5/8/95 35 * $FreeBSD: src/sbin/mount/mount.c,v 1.39.2.3 2001/08/01 08:26:23 obrien Exp $ 36 * $DragonFly: src/sbin/mount/mount.c,v 1.10 2005/04/03 17:13:08 joerg Exp $ 37 */ 38 39 #include <sys/param.h> 40 #include <sys/mount.h> 41 #include <sys/stat.h> 42 #include <sys/wait.h> 43 44 #include <err.h> 45 #include <errno.h> 46 #include <fstab.h> 47 #include <pwd.h> 48 #include <signal.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 54 #include "extern.h" 55 #include "mntopts.h" 56 #include "pathnames.h" 57 58 /* `meta' options */ 59 #define MOUNT_META_OPTION_FSTAB "fstab" 60 #define MOUNT_META_OPTION_CURRENT "current" 61 62 int debug, fstab_style, verbose; 63 64 static char *catopt(char *, const char *); 65 static struct statfs 66 *getmntpt(const char *); 67 static int hasopt(const char *, const char *); 68 static int ismounted(struct fstab *, struct statfs *, int); 69 static int isremountable(const char *); 70 static void mangle(char *, int *, const char **); 71 static char *update_options(char *, char *, int); 72 static int mountfs(const char *, const char *, const char *, 73 int, const char *, const char *); 74 static void remopt(char *, const char *); 75 static void prmount(struct statfs *); 76 static void putfsent(const struct statfs *); 77 static void usage(void); 78 static char *flags2opts(int); 79 static char *xstrdup(const char *str); 80 81 /* Map from mount options to printable formats. */ 82 static struct opt { 83 int o_opt; 84 const char *o_name; 85 } optnames[] = { 86 { MNT_ASYNC, "asynchronous" }, 87 { MNT_EXPORTED, "NFS exported" }, 88 { MNT_LOCAL, "local" }, 89 { MNT_NOATIME, "noatime" }, 90 { MNT_NODEV, "nodev" }, 91 { MNT_NOEXEC, "noexec" }, 92 { MNT_NOSUID, "nosuid" }, 93 { MNT_NOSYMFOLLOW, "nosymfollow" }, 94 { MNT_QUOTA, "with quotas" }, 95 { MNT_RDONLY, "read-only" }, 96 { MNT_SYNCHRONOUS, "synchronous" }, 97 { MNT_UNION, "union" }, 98 { MNT_NOCLUSTERR, "noclusterr" }, 99 { MNT_NOCLUSTERW, "noclusterw" }, 100 { MNT_SUIDDIR, "suiddir" }, 101 { MNT_SOFTDEP, "soft-updates" }, 102 { 0, NULL } 103 }; 104 105 /* 106 * List of VFS types that can be remounted without becoming mounted on top 107 * of each other. 108 * XXX Is this list correct? 109 */ 110 static const char * 111 remountable_fs_names[] = { 112 "ufs", "ffs", "ext2fs", 113 0 114 }; 115 116 int 117 main(int argc, char **argv) 118 { 119 const char *mntfromname, **vfslist, *vfstype; 120 struct fstab *fs; 121 struct statfs *mntbuf; 122 FILE *mountdfp; 123 pid_t pid; 124 int all, ch, i, init_flags, mntsize, rval, have_fstab; 125 char *options; 126 127 all = init_flags = 0; 128 options = NULL; 129 vfslist = NULL; 130 vfstype = "ufs"; 131 while ((ch = getopt(argc, argv, "adfo:prwt:uv")) != -1) 132 switch (ch) { 133 case 'a': 134 all = 1; 135 break; 136 case 'd': 137 debug = 1; 138 break; 139 case 'f': 140 init_flags |= MNT_FORCE; 141 break; 142 case 'o': 143 if (*optarg) 144 options = catopt(options, optarg); 145 break; 146 case 'p': 147 fstab_style = 1; 148 verbose = 1; 149 break; 150 case 'r': 151 options = catopt(options, "ro"); 152 break; 153 case 't': 154 if (vfslist != NULL) 155 errx(1, "only one -t option may be specified"); 156 vfslist = makevfslist(optarg); 157 vfstype = optarg; 158 break; 159 case 'u': 160 init_flags |= MNT_UPDATE; 161 break; 162 case 'v': 163 verbose = 1; 164 break; 165 case 'w': 166 options = catopt(options, "noro"); 167 break; 168 case '?': 169 default: 170 usage(); 171 /* NOTREACHED */ 172 } 173 argc -= optind; 174 argv += optind; 175 176 #define BADTYPE(type) \ 177 (strcmp(type, FSTAB_RO) && \ 178 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 179 180 rval = 0; 181 switch (argc) { 182 case 0: 183 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 184 err(1, "getmntinfo"); 185 if (all) { 186 while ((fs = getfsent()) != NULL) { 187 if (BADTYPE(fs->fs_type)) 188 continue; 189 if (checkvfsname(fs->fs_vfstype, vfslist)) 190 continue; 191 if (hasopt(fs->fs_mntops, "noauto")) 192 continue; 193 if (!(init_flags & MNT_UPDATE) && 194 ismounted(fs, mntbuf, mntsize)) 195 continue; 196 options = update_options(options, 197 fs->fs_mntops, mntbuf->f_flags); 198 if (mountfs(fs->fs_vfstype, fs->fs_spec, 199 fs->fs_file, init_flags, options, 200 fs->fs_mntops)) 201 rval = 1; 202 } 203 } else if (fstab_style) { 204 for (i = 0; i < mntsize; i++) { 205 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 206 continue; 207 putfsent(&mntbuf[i]); 208 } 209 } else { 210 for (i = 0; i < mntsize; i++) { 211 if (checkvfsname(mntbuf[i].f_fstypename, 212 vfslist)) 213 continue; 214 prmount(&mntbuf[i]); 215 } 216 } 217 exit(rval); 218 case 1: 219 if (vfslist != NULL) 220 usage(); 221 222 rmslashes(*argv, *argv); 223 224 if (init_flags & MNT_UPDATE) { 225 mntfromname = NULL; 226 have_fstab = 0; 227 if ((mntbuf = getmntpt(*argv)) == NULL) 228 errx(1, "not currently mounted %s", *argv); 229 /* 230 * Only get the mntflags from fstab if both mntpoint 231 * and mntspec are identical. Also handle the special 232 * case where just '/' is mounted and 'spec' is not 233 * identical with the one from fstab ('/dev' is missing 234 * in the spec-string at boot-time). 235 */ 236 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 237 if (strcmp(fs->fs_spec, 238 mntbuf->f_mntfromname) == 0 && 239 strcmp(fs->fs_file, 240 mntbuf->f_mntonname) == 0) { 241 have_fstab = 1; 242 mntfromname = mntbuf->f_mntfromname; 243 } else if (argv[0][0] == '/' && 244 argv[0][1] == '\0') { 245 fs = getfsfile("/"); 246 have_fstab = 1; 247 mntfromname = fs->fs_spec; 248 } 249 } 250 if (have_fstab) { 251 options = update_options(options, fs->fs_mntops, 252 mntbuf->f_flags); 253 } else { 254 mntfromname = mntbuf->f_mntfromname; 255 options = update_options(options, NULL, 256 mntbuf->f_flags); 257 } 258 rval = mountfs(mntbuf->f_fstypename, mntfromname, 259 mntbuf->f_mntonname, init_flags, options, 0); 260 break; 261 } 262 if ((fs = getfsfile(*argv)) == NULL && 263 (fs = getfsspec(*argv)) == NULL) 264 errx(1, "%s: unknown special file or file system", 265 *argv); 266 if (BADTYPE(fs->fs_type)) 267 errx(1, "%s has unknown file system type", 268 *argv); 269 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 270 init_flags, options, fs->fs_mntops); 271 break; 272 case 2: 273 /* 274 * If -t flag has not been specified, the path cannot be 275 * found, spec contains either a ':' or a '@', and the 276 * spec is not a file with those characters, then assume 277 * that an NFS filesystem is being specified ala Sun. 278 */ 279 if (vfslist == NULL && strpbrk(argv[0], ":@") != NULL && 280 access(argv[0], 0) == -1) 281 vfstype = "nfs"; 282 rval = mountfs(vfstype, 283 argv[0], argv[1], init_flags, options, NULL); 284 break; 285 default: 286 usage(); 287 /* NOTREACHED */ 288 } 289 290 /* 291 * If the mount was successfully, and done by root, tell mountd the 292 * good news. Pid checks are probably unnecessary, but don't hurt. 293 */ 294 if (rval == 0 && getuid() == 0 && 295 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 296 if (fscanf(mountdfp, "%d", &pid) == 1 && 297 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 298 err(1, "signal mountd"); 299 fclose(mountdfp); 300 } 301 302 exit(rval); 303 } 304 305 static int 306 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 307 { 308 int i; 309 310 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 311 /* the root file system can always be remounted */ 312 return (0); 313 314 for (i = mntsize - 1; i >= 0; --i) 315 if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 && 316 (!isremountable(fs->fs_vfstype) || 317 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 318 return (1); 319 return (0); 320 } 321 322 static int 323 isremountable(const char *vfsname) 324 { 325 const char **cp; 326 327 for (cp = remountable_fs_names; *cp; cp++) 328 if (strcmp(*cp, vfsname) == 0) 329 return (1); 330 return (0); 331 } 332 333 static int 334 hasopt(const char *mntopts, const char *option) 335 { 336 int negative, found; 337 char *opt, *optbuf; 338 339 if (option[0] == 'n' && option[1] == 'o') { 340 negative = 1; 341 option += 2; 342 } else 343 negative = 0; 344 optbuf = xstrdup(mntopts); 345 found = 0; 346 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 347 if (opt[0] == 'n' && opt[1] == 'o') { 348 if (!strcasecmp(opt + 2, option)) 349 found = negative; 350 } else if (!strcasecmp(opt, option)) 351 found = !negative; 352 } 353 free(optbuf); 354 return (found); 355 } 356 357 static int 358 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 359 const char *options, const char *mntopts) 360 { 361 /* List of directories containing mount_xxx subcommands. */ 362 static const char *edirs[] = { 363 _PATH_SBIN, 364 _PATH_USRSBIN, 365 NULL 366 }; 367 const char *argv[100], **edir; 368 struct statfs sf; 369 pid_t pid; 370 int argc, i, status; 371 char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN]; 372 373 #if __GNUC__ 374 (void)&optbuf; 375 (void)&name; 376 #endif 377 378 /* resolve the mountpoint with realpath(3) */ 379 checkpath(name, mntpath); 380 name = mntpath; 381 382 if (mntopts == NULL) 383 mntopts = ""; 384 if (options == NULL) { 385 if (*mntopts == '\0') { 386 options = "rw"; 387 } else { 388 options = mntopts; 389 mntopts = ""; 390 } 391 } 392 optbuf = catopt(xstrdup(mntopts), options); 393 394 if (strcmp(name, "/") == 0) 395 flags |= MNT_UPDATE; 396 if (flags & MNT_FORCE) 397 optbuf = catopt(optbuf, "force"); 398 if (flags & MNT_RDONLY) 399 optbuf = catopt(optbuf, "ro"); 400 /* 401 * XXX 402 * The mount_mfs (newfs) command uses -o to select the 403 * optimization mode. We don't pass the default "-o rw" 404 * for that reason. 405 */ 406 if (flags & MNT_UPDATE) 407 optbuf = catopt(optbuf, "update"); 408 409 argc = 0; 410 argv[argc++] = vfstype; 411 mangle(optbuf, &argc, argv); 412 argv[argc++] = spec; 413 argv[argc++] = name; 414 argv[argc] = NULL; 415 416 if (debug) { 417 printf("exec: mount_%s", vfstype); 418 for (i = 1; i < argc; i++) 419 printf(" %s", argv[i]); 420 printf("\n"); 421 return (0); 422 } 423 424 switch (pid = fork()) { 425 case -1: /* Error. */ 426 warn("fork"); 427 free(optbuf); 428 return (1); 429 case 0: /* Child. */ 430 if (strcmp(vfstype, "ufs") == 0) 431 exit(mount_ufs(argc, argv)); 432 433 /* Go find an executable. */ 434 for (edir = edirs; *edir; edir++) { 435 snprintf(execname, 436 sizeof(execname), "%s/mount_%s", *edir, vfstype); 437 execv(execname, __DECONST(char * const *, argv)); 438 } 439 if (errno == ENOENT) { 440 int len = 0; 441 char *cp; 442 for (edir = edirs; *edir; edir++) 443 len += strlen(*edir) + 2; /* ", " */ 444 if ((cp = malloc(len)) == NULL) 445 errx(1, "malloc failed"); 446 cp[0] = '\0'; 447 for (edir = edirs; *edir; edir++) { 448 strcat(cp, *edir); 449 if (edir[1] != NULL) 450 strcat(cp, ", "); 451 } 452 warn("exec mount_%s not found in %s", vfstype, cp); 453 } 454 exit(1); 455 /* NOTREACHED */ 456 default: /* Parent. */ 457 free(optbuf); 458 459 if (waitpid(pid, &status, 0) < 0) { 460 warn("waitpid"); 461 return (1); 462 } 463 464 if (WIFEXITED(status)) { 465 if (WEXITSTATUS(status) != 0) 466 return (WEXITSTATUS(status)); 467 } else if (WIFSIGNALED(status)) { 468 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 469 return (1); 470 } 471 472 if (verbose) { 473 if (statfs(name, &sf) < 0) { 474 warn("statfs %s", name); 475 return (1); 476 } 477 if (fstab_style) 478 putfsent(&sf); 479 else 480 prmount(&sf); 481 } 482 break; 483 } 484 485 return (0); 486 } 487 488 static void 489 prmount(struct statfs *sfp) 490 { 491 int flags; 492 struct opt *o; 493 struct passwd *pw; 494 495 printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 496 sfp->f_fstypename); 497 498 flags = sfp->f_flags & MNT_VISFLAGMASK; 499 for (o = optnames; flags && o->o_opt; o++) 500 if (flags & o->o_opt) { 501 printf(", %s", o->o_name); 502 flags &= ~o->o_opt; 503 } 504 if (sfp->f_owner) { 505 printf(", mounted by "); 506 if ((pw = getpwuid(sfp->f_owner)) != NULL) 507 printf("%s", pw->pw_name); 508 else 509 printf("%d", sfp->f_owner); 510 } 511 if (verbose) { 512 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 513 printf(", writes: sync %ld async %ld", 514 sfp->f_syncwrites, sfp->f_asyncwrites); 515 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 516 printf(", reads: sync %ld async %ld", 517 sfp->f_syncreads, sfp->f_asyncreads); 518 } 519 printf(")\n"); 520 } 521 522 static struct statfs * 523 getmntpt(const char *name) 524 { 525 struct statfs *mntbuf; 526 int i, mntsize; 527 528 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 529 for (i = mntsize - 1; i >= 0; i--) { 530 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 531 strcmp(mntbuf[i].f_mntonname, name) == 0) 532 return (&mntbuf[i]); 533 } 534 return (NULL); 535 } 536 537 static char * 538 catopt(char *s0, const char *s1) 539 { 540 size_t i; 541 char *cp; 542 543 if (s1 == NULL || *s1 == '\0') 544 return s0; 545 546 if (s0 && *s0) { 547 i = strlen(s0) + strlen(s1) + 1 + 1; 548 if ((cp = malloc(i)) == NULL) 549 errx(1, "malloc failed"); 550 snprintf(cp, i, "%s,%s", s0, s1); 551 } else 552 cp = xstrdup(s1); 553 554 if (s0) 555 free(s0); 556 return (cp); 557 } 558 559 static void 560 mangle(char *options, int *argcp, const char **argv) 561 { 562 char *p, *s; 563 int argc; 564 565 argc = *argcp; 566 for (s = options; (p = strsep(&s, ",")) != NULL;) 567 if (*p != '\0') { 568 if (*p == '-') { 569 argv[argc++] = p; 570 p = strchr(p, '='); 571 if (p) { 572 *p = '\0'; 573 argv[argc++] = p+1; 574 } 575 } else if (strcmp(p, "rw") != 0) { 576 argv[argc++] = "-o"; 577 argv[argc++] = p; 578 } 579 } 580 581 *argcp = argc; 582 } 583 584 585 static char * 586 update_options(char *opts, char *fstab, int curflags) 587 { 588 char *o, *p; 589 char *cur; 590 char *expopt, *newopt, *tmpopt; 591 592 if (opts == NULL) 593 return xstrdup(""); 594 595 /* remove meta options from list */ 596 remopt(fstab, MOUNT_META_OPTION_FSTAB); 597 remopt(fstab, MOUNT_META_OPTION_CURRENT); 598 cur = flags2opts(curflags); 599 600 /* 601 * Expand all meta-options passed to us first. 602 */ 603 expopt = NULL; 604 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 605 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 606 expopt = catopt(expopt, fstab); 607 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 608 expopt = catopt(expopt, cur); 609 else 610 expopt = catopt(expopt, o); 611 } 612 free(cur); 613 free(opts); 614 615 /* 616 * Remove previous contradictory arguments. Given option "foo" we 617 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 618 * and "foo" - so we can deal with possible options like "notice". 619 */ 620 newopt = NULL; 621 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 622 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 623 errx(1, "malloc failed"); 624 625 strcpy(tmpopt, "no"); 626 strcat(tmpopt, o); 627 remopt(newopt, tmpopt); 628 free(tmpopt); 629 630 if (strncmp("no", o, 2) == 0) 631 remopt(newopt, o+2); 632 633 newopt = catopt(newopt, o); 634 } 635 free(expopt); 636 637 return newopt; 638 } 639 640 static void 641 remopt(char *string, const char *opt) 642 { 643 char *o, *p, *r; 644 645 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 646 return; 647 648 r = string; 649 650 for (p = string; (o = strsep(&p, ",")) != NULL;) { 651 if (strcmp(opt, o) != 0) { 652 if (*r == ',' && *o != '\0') 653 r++; 654 while ((*r++ = *o++) != '\0') 655 ; 656 *--r = ','; 657 } 658 } 659 *r = '\0'; 660 } 661 662 static void 663 usage(void) 664 { 665 666 fprintf(stderr, "%s\n%s\n%s\n", 667 "usage: mount [-dfpruvw] [-o options] [-t ufs | external_type] special node", 668 " mount [-adfpruvw] [-o options] [-t ufs | external_type]", 669 " mount [-dfpruvw] special | node"); 670 exit(1); 671 } 672 673 static void 674 putfsent(const struct statfs *ent) 675 { 676 struct fstab *fst; 677 char *opts; 678 679 opts = flags2opts(ent->f_flags); 680 printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname, 681 ent->f_fstypename, opts); 682 free(opts); 683 684 if ((fst = getfsspec(ent->f_mntfromname))) 685 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 686 else if ((fst = getfsfile(ent->f_mntonname))) 687 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 688 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 689 if (strcmp(ent->f_mntonname, "/") == 0) 690 printf("\t1 1\n"); 691 else 692 printf("\t2 2\n"); 693 } else 694 printf("\t0 0\n"); 695 } 696 697 698 static char * 699 flags2opts(int flags) 700 { 701 char *res; 702 703 res = NULL; 704 705 res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw"); 706 707 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 708 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 709 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 710 if (flags & MNT_NODEV) res = catopt(res, "nodev"); 711 if (flags & MNT_UNION) res = catopt(res, "union"); 712 if (flags & MNT_ASYNC) res = catopt(res, "async"); 713 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 714 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 715 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 716 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 717 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 718 719 return res; 720 } 721 722 static char* 723 xstrdup(const char *str) 724 { 725 char* ret = strdup(str); 726 if(ret == NULL) { 727 errx(1, "strdup failed (could not allocate memory)"); 728 } 729 return ret; 730 } 731