1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1986, 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#if 0 33#ifndef lint 34static const char copyright[] = 35"@(#) Copyright (c) 1980, 1986, 1993\n\ 36 The Regents of the University of California. All rights reserved.\n"; 37#endif /* not lint */ 38 39#ifndef lint 40static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95"; 41#endif /* not lint */ 42#endif 43#include <sys/cdefs.h> 44__FBSDID("$FreeBSD$"); 45 46#define IN_RTLD /* So we pickup the P_OSREL defines */ 47#include <sys/param.h> 48#include <sys/file.h> 49#include <sys/mount.h> 50#include <sys/resource.h> 51#include <sys/stat.h> 52#include <sys/sysctl.h> 53#include <sys/uio.h> 54#include <sys/disklabel.h> 55 56#include <ufs/ufs/dinode.h> 57#include <ufs/ffs/fs.h> 58 59#include <err.h> 60#include <errno.h> 61#include <fstab.h> 62#include <grp.h> 63#include <inttypes.h> 64#include <mntopts.h> 65#include <paths.h> 66#include <stdint.h> 67#include <string.h> 68#include <time.h> 69 70#include "fsck.h" 71 72int restarts; 73 74static void usage(void) __dead2; 75static intmax_t argtoimax(int flag, const char *req, const char *str, int base); 76static int checkfilesys(char *filesys); 77static int chkdoreload(struct statfs *mntp); 78static struct statfs *getmntpt(const char *); 79 80int 81main(int argc, char *argv[]) 82{ 83 int ch; 84 struct rlimit rlimit; 85 struct itimerval itimerval; 86 int fsret; 87 int ret = 0; 88 89 sync(); 90 skipclean = 1; 91 inoopt = 0; 92 while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npRrSyZz")) != -1) { 93 switch (ch) { 94 case 'b': 95 skipclean = 0; 96 bflag = argtoimax('b', "number", optarg, 10); 97 printf("Alternate super block location: %jd\n", bflag); 98 break; 99 100 case 'B': 101 bkgrdflag = 1; 102 break; 103 104 case 'c': 105 skipclean = 0; 106 cvtlevel = argtoimax('c', "conversion level", optarg, 107 10); 108 if (cvtlevel < 3) 109 errx(EEXIT, "cannot do level %d conversion", 110 cvtlevel); 111 break; 112 113 case 'd': 114 debug++; 115 break; 116 117 case 'E': 118 Eflag++; 119 break; 120 121 case 'f': 122 skipclean = 0; 123 break; 124 125 case 'F': 126 bkgrdcheck = 1; 127 break; 128 129 case 'm': 130 lfmode = argtoimax('m', "mode", optarg, 8); 131 if (lfmode &~ 07777) 132 errx(EEXIT, "bad mode to -m: %o", lfmode); 133 printf("** lost+found creation mode %o\n", lfmode); 134 break; 135 136 case 'n': 137 nflag++; 138 yflag = 0; 139 break; 140 141 case 'p': 142 preen++; 143 /*FALLTHROUGH*/ 144 145 case 'C': 146 ckclean++; 147 break; 148 149 case 'R': 150 wantrestart = 1; 151 break; 152 case 'r': 153 inoopt++; 154 break; 155 156 case 'S': 157 surrender = 1; 158 break; 159 160 case 'y': 161 yflag++; 162 nflag = 0; 163 break; 164 165 case 'Z': 166 Zflag++; 167 break; 168 169 case 'z': 170 zflag++; 171 break; 172 173 default: 174 usage(); 175 } 176 } 177 argc -= optind; 178 argv += optind; 179 180 if (!argc) 181 usage(); 182 183 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 184 (void)signal(SIGINT, catch); 185 if (ckclean) 186 (void)signal(SIGQUIT, catchquit); 187 signal(SIGINFO, infohandler); 188 if (bkgrdflag) { 189 signal(SIGALRM, alarmhandler); 190 itimerval.it_interval.tv_sec = 5; 191 itimerval.it_interval.tv_usec = 0; 192 itimerval.it_value.tv_sec = 5; 193 itimerval.it_value.tv_usec = 0; 194 setitimer(ITIMER_REAL, &itimerval, NULL); 195 } 196 /* 197 * Push up our allowed memory limit so we can cope 198 * with huge file systems. 199 */ 200 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 201 rlimit.rlim_cur = rlimit.rlim_max; 202 (void)setrlimit(RLIMIT_DATA, &rlimit); 203 } 204 while (argc > 0) { 205 if ((fsret = checkfilesys(*argv)) == ERESTART) 206 continue; 207 ret |= fsret; 208 argc--; 209 argv++; 210 } 211 212 if (returntosingle) 213 ret = 2; 214 exit(ret); 215} 216 217static intmax_t 218argtoimax(int flag, const char *req, const char *str, int base) 219{ 220 char *cp; 221 intmax_t ret; 222 223 ret = strtoimax(str, &cp, base); 224 if (cp == str || *cp) 225 errx(EEXIT, "-%c flag requires a %s", flag, req); 226 return (ret); 227} 228 229/* 230 * Check the specified file system. 231 */ 232/* ARGSUSED */ 233static int 234checkfilesys(char *filesys) 235{ 236 ufs2_daddr_t n_ffree, n_bfree; 237 struct dups *dp; 238 struct statfs *mntp; 239 struct stat snapdir; 240 struct group *grp; 241 struct iovec *iov; 242 char errmsg[255]; 243 int ofsmodified; 244 int iovlen; 245 int cylno; 246 intmax_t blks, files; 247 size_t size; 248 249 iov = NULL; 250 iovlen = 0; 251 errmsg[0] = '\0'; 252 fsutilinit(); 253 fsckinit(); 254 255 cdevname = filesys; 256 if (debug && ckclean) 257 pwarn("starting\n"); 258 /* 259 * Make best effort to get the disk name. Check first to see 260 * if it is listed among the mounted file systems. Failing that 261 * check to see if it is listed in /etc/fstab. 262 */ 263 mntp = getmntpt(filesys); 264 if (mntp != NULL) 265 filesys = mntp->f_mntfromname; 266 else 267 filesys = blockcheck(filesys); 268 /* 269 * If -F flag specified, check to see whether a background check 270 * is possible and needed. If possible and needed, exit with 271 * status zero. Otherwise exit with status non-zero. A non-zero 272 * exit status will cause a foreground check to be run. 273 */ 274 sblock_init(); 275 if (bkgrdcheck) { 276 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 277 exit(3); /* Cannot read superblock */ 278 close(fsreadfd); 279 /* Earlier background failed or journaled */ 280 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) 281 exit(4); 282 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 283 exit(5); /* Not running soft updates */ 284 size = MIBSIZE; 285 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 286 exit(6); /* Lacks kernel support */ 287 if ((mntp == NULL && sblock.fs_clean == 1) || 288 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 289 exit(7); /* Filesystem clean, report it now */ 290 exit(0); 291 } 292 if (ckclean && skipclean) { 293 /* 294 * If file system is gjournaled, check it here. 295 */ 296 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 297 exit(3); /* Cannot read superblock */ 298 close(fsreadfd); 299 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 300 //printf("GJournaled file system detected on %s.\n", 301 // filesys); 302 if (sblock.fs_clean == 1) { 303 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 304 exit(0); 305 } 306 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 307 gjournal_check(filesys); 308 if (chkdoreload(mntp) == 0) 309 exit(0); 310 exit(4); 311 } else { 312 pfatal( 313 "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n"); 314 } 315 } 316 } 317 /* 318 * If we are to do a background check: 319 * Get the mount point information of the file system 320 * create snapshot file 321 * return created snapshot file 322 * if not found, clear bkgrdflag and proceed with normal fsck 323 */ 324 if (bkgrdflag) { 325 if (mntp == NULL) { 326 bkgrdflag = 0; 327 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 328 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 329 bkgrdflag = 0; 330 pfatal( 331 "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n"); 332 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 333 bkgrdflag = 0; 334 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 335 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 336 if (readsb(0) != 0) { 337 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) { 338 bkgrdflag = 0; 339 pfatal( 340 "UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n"); 341 } 342 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 343 skipclean && ckclean) { 344 /* 345 * file system is clean; 346 * skip snapshot and report it clean 347 */ 348 pwarn( 349 "FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 350 goto clean; 351 } 352 } 353 close(fsreadfd); 354 } 355 if (bkgrdflag) { 356 snprintf(snapname, sizeof snapname, "%s/.snap", 357 mntp->f_mntonname); 358 if (stat(snapname, &snapdir) < 0) { 359 if (errno != ENOENT) { 360 bkgrdflag = 0; 361 pfatal( 362 "CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 363 snapname, strerror(errno)); 364 } else if ((grp = getgrnam("operator")) == NULL || 365 mkdir(snapname, 0770) < 0 || 366 chown(snapname, -1, grp->gr_gid) < 0 || 367 chmod(snapname, 0770) < 0) { 368 bkgrdflag = 0; 369 pfatal( 370 "CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 371 snapname, strerror(errno)); 372 } 373 } else if (!S_ISDIR(snapdir.st_mode)) { 374 bkgrdflag = 0; 375 pfatal( 376 "%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n", 377 snapname); 378 } 379 } 380 if (bkgrdflag) { 381 snprintf(snapname, sizeof snapname, 382 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 383 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 384 build_iovec(&iov, &iovlen, "from", snapname, 385 (size_t)-1); 386 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 387 (size_t)-1); 388 build_iovec(&iov, &iovlen, "errmsg", errmsg, 389 sizeof(errmsg)); 390 build_iovec(&iov, &iovlen, "update", NULL, 0); 391 build_iovec(&iov, &iovlen, "snapshot", NULL, 0); 392 393 while (nmount(iov, iovlen, mntp->f_flags) < 0) { 394 if (errno == EEXIST && unlink(snapname) == 0) 395 continue; 396 bkgrdflag = 0; 397 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n", 398 snapname, strerror(errno), errmsg); 399 break; 400 } 401 if (bkgrdflag != 0) 402 filesys = snapname; 403 } 404 } 405 406 switch (setup(filesys)) { 407 case 0: 408 if (preen) 409 pfatal("CAN'T CHECK FILE SYSTEM."); 410 return (0); 411 case -1: 412 clean: 413 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 414 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 415 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n", 416 (intmax_t)sblock.fs_cstotal.cs_nffree, 417 (intmax_t)sblock.fs_cstotal.cs_nbfree, 418 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 419 return (0); 420 } 421 /* 422 * Determine if we can and should do journal recovery. 423 */ 424 if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) { 425 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) { 426 if (suj_check(filesys) == 0) { 427 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n"); 428 if (chkdoreload(mntp) == 0) 429 exit(0); 430 exit(4); 431 } 432 printf("** Skipping journal, falling through to full fsck\n\n"); 433 } 434 /* 435 * Write the superblock so we don't try to recover the 436 * journal on another pass. If this is the only change 437 * to the filesystem, we do not want it to be called 438 * out as modified. 439 */ 440 sblock.fs_mtime = time(NULL); 441 sbdirty(); 442 ofsmodified = fsmodified; 443 flush(fswritefd, &sblk); 444 fsmodified = ofsmodified; 445 } 446 /* 447 * If the filesystem was run on an old kernel that did not 448 * support check hashes, clear the check-hash flags so that 449 * we do not try to verify them. 450 */ 451 if ((sblock.fs_flags & FS_METACKHASH) == 0) 452 sblock.fs_metackhash = 0; 453 /* 454 * If we are running on a kernel that can provide check hashes 455 * that are not yet enabled for the filesystem and we are 456 * running manually without the -y flag, offer to add any 457 * supported check hashes that are not already enabled. 458 */ 459 ckhashadd = 0; 460 if (preen == 0 && yflag == 0 && sblock.fs_magic != FS_UFS1_MAGIC && 461 fswritefd != -1 && getosreldate() >= P_OSREL_CK_CYLGRP) { 462 if ((sblock.fs_metackhash & CK_CYLGRP) == 0 && 463 reply("ADD CYLINDER GROUP CHECK-HASH PROTECTION") != 0) 464 ckhashadd |= CK_CYLGRP; 465#ifdef notyet 466 if ((sblock.fs_metackhash & CK_SUPERBLOCK) == 0 && 467 getosreldate() >= P_OSREL_CK_SUPERBLOCK && 468 reply("ADD SUPERBLOCK CHECK-HASH PROTECTION") != 0) 469 ckhashadd |= CK_SUPERBLOCK; 470 if ((sblock.fs_metackhash & CK_INODE) == 0 && 471 getosreldate() >= P_OSREL_CK_INODE && 472 reply("ADD INODE CHECK-HASH PROTECTION") != 0) 473 ckhashadd |= CK_INODE; 474 if ((sblock.fs_metackhash & CK_INDIR) == 0 && 475 getosreldate() >= P_OSREL_CK_INDIR && 476 reply("ADD INDIRECT BLOCK CHECK-HASH PROTECTION") != 0) 477 ckhashadd |= CK_INDIR; 478 if ((sblock.fs_metackhash & CK_DIR) == 0 && 479 getosreldate() >= P_OSREL_CK_DIR && 480 reply("ADD DIRECTORY CHECK-HASH PROTECTION") != 0) 481 ckhashadd |= CK_DIR; 482#endif /* notyet */ 483 if (ckhashadd != 0) 484 sblock.fs_flags |= FS_METACKHASH; 485 } 486 /* 487 * Cleared if any questions answered no. Used to decide if 488 * the superblock should be marked clean. 489 */ 490 resolved = 1; 491 /* 492 * 1: scan inodes tallying blocks used 493 */ 494 if (preen == 0) { 495 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 496 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 497 printf("** Root file system\n"); 498 printf("** Phase 1 - Check Blocks and Sizes\n"); 499 } 500 clock_gettime(CLOCK_REALTIME_PRECISE, &startprog); 501 pass1(); 502 IOstats("Pass1"); 503 504 /* 505 * 1b: locate first references to duplicates, if any 506 */ 507 if (duplist) { 508 if (preen || usedsoftdep) 509 pfatal("INTERNAL ERROR: dups with %s%s%s", 510 preen ? "-p" : "", 511 (preen && usedsoftdep) ? " and " : "", 512 usedsoftdep ? "softupdates" : ""); 513 printf("** Phase 1b - Rescan For More DUPS\n"); 514 pass1b(); 515 IOstats("Pass1b"); 516 } 517 518 /* 519 * 2: traverse directories from root to mark all connected directories 520 */ 521 if (preen == 0) 522 printf("** Phase 2 - Check Pathnames\n"); 523 pass2(); 524 IOstats("Pass2"); 525 526 /* 527 * 3: scan inodes looking for disconnected directories 528 */ 529 if (preen == 0) 530 printf("** Phase 3 - Check Connectivity\n"); 531 pass3(); 532 IOstats("Pass3"); 533 534 /* 535 * 4: scan inodes looking for disconnected files; check reference counts 536 */ 537 if (preen == 0) 538 printf("** Phase 4 - Check Reference Counts\n"); 539 pass4(); 540 IOstats("Pass4"); 541 542 /* 543 * 5: check and repair resource counts in cylinder groups 544 */ 545 if (preen == 0) 546 printf("** Phase 5 - Check Cyl groups\n"); 547 pass5(); 548 IOstats("Pass5"); 549 550 /* 551 * print out summary statistics 552 */ 553 n_ffree = sblock.fs_cstotal.cs_nffree; 554 n_bfree = sblock.fs_cstotal.cs_nbfree; 555 files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 556 blks = n_blks + 557 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 558 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 559 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 560 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 561 if (bkgrdflag && (files > 0 || blks > 0)) { 562 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 563 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n", 564 countdirs, files - countdirs, blks); 565 } 566 pwarn("%ld files, %jd used, %ju free ", 567 (long)n_files, (intmax_t)n_blks, 568 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 569 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 570 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 571 n_ffree * 100.0 / sblock.fs_dsize); 572 if (debug) { 573 if (files < 0) 574 printf("%jd inodes missing\n", -files); 575 if (blks < 0) 576 printf("%jd blocks missing\n", -blks); 577 if (duplist != NULL) { 578 printf("The following duplicate blocks remain:"); 579 for (dp = duplist; dp; dp = dp->next) 580 printf(" %jd,", (intmax_t)dp->dup); 581 printf("\n"); 582 } 583 } 584 duplist = (struct dups *)0; 585 muldup = (struct dups *)0; 586 inocleanup(); 587 if (fsmodified) { 588 sblock.fs_time = time(NULL); 589 sbdirty(); 590 } 591 if (cvtlevel && sblk.b_dirty) { 592 /* 593 * Write out the duplicate super blocks 594 */ 595 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 596 blwrite(fswritefd, (char *)&sblock, 597 fsbtodb(&sblock, cgsblock(&sblock, cylno)), 598 SBLOCKSIZE); 599 } 600 if (rerun) 601 resolved = 0; 602 finalIOstats(); 603 604 /* 605 * Check to see if the file system is mounted read-write. 606 */ 607 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 608 resolved = 0; 609 ckfini(resolved); 610 611 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 612 if (inostathead[cylno].il_stat != NULL) 613 free((char *)inostathead[cylno].il_stat); 614 free((char *)inostathead); 615 inostathead = NULL; 616 if (fsmodified && !preen) 617 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 618 if (rerun) { 619 if (wantrestart && (restarts++ < 10) && 620 (preen || reply("RESTART"))) 621 return (ERESTART); 622 printf("\n***** PLEASE RERUN FSCK *****\n"); 623 } 624 if (chkdoreload(mntp) != 0) { 625 if (!fsmodified) 626 return (0); 627 if (!preen) 628 printf("\n***** REBOOT NOW *****\n"); 629 sync(); 630 return (4); 631 } 632 return (rerun ? ERERUN : 0); 633} 634 635static int 636chkdoreload(struct statfs *mntp) 637{ 638 struct iovec *iov; 639 int iovlen; 640 char errmsg[255]; 641 642 if (mntp == NULL) 643 return (0); 644 645 iov = NULL; 646 iovlen = 0; 647 errmsg[0] = '\0'; 648 /* 649 * We modified a mounted file system. Do a mount update on 650 * it unless it is read-write, so we can continue using it 651 * as safely as possible. 652 */ 653 if (mntp->f_flags & MNT_RDONLY) { 654 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 655 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 656 (size_t)-1); 657 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 658 (size_t)-1); 659 build_iovec(&iov, &iovlen, "errmsg", errmsg, 660 sizeof(errmsg)); 661 build_iovec(&iov, &iovlen, "update", NULL, 0); 662 build_iovec(&iov, &iovlen, "reload", NULL, 0); 663 /* 664 * XX: We need the following line until we clean up 665 * nmount parsing of root mounts and NFS root mounts. 666 */ 667 build_iovec(&iov, &iovlen, "ro", NULL, 0); 668 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 669 return (0); 670 } 671 pwarn("mount reload of '%s' failed: %s %s\n\n", 672 mntp->f_mntonname, strerror(errno), errmsg); 673 return (1); 674 } 675 return (0); 676} 677 678/* 679 * Get the mount point information for name. 680 */ 681static struct statfs * 682getmntpt(const char *name) 683{ 684 struct stat devstat, mntdevstat; 685 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 686 char *ddevname; 687 struct statfs *mntbuf, *statfsp; 688 int i, mntsize, isdev; 689 690 if (stat(name, &devstat) != 0) 691 return (NULL); 692 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 693 isdev = 1; 694 else 695 isdev = 0; 696 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 697 for (i = 0; i < mntsize; i++) { 698 statfsp = &mntbuf[i]; 699 ddevname = statfsp->f_mntfromname; 700 if (*ddevname != '/') { 701 if (strlen(_PATH_DEV) + strlen(ddevname) + 1 > 702 sizeof(statfsp->f_mntfromname)) 703 continue; 704 strcpy(device, _PATH_DEV); 705 strcat(device, ddevname); 706 strcpy(statfsp->f_mntfromname, device); 707 } 708 if (isdev == 0) { 709 if (strcmp(name, statfsp->f_mntonname)) 710 continue; 711 return (statfsp); 712 } 713 if (stat(ddevname, &mntdevstat) == 0 && 714 mntdevstat.st_rdev == devstat.st_rdev) 715 return (statfsp); 716 } 717 statfsp = NULL; 718 return (statfsp); 719} 720 721static void 722usage(void) 723{ 724 (void) fprintf(stderr, 725"usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n", 726 getprogname()); 727 exit(1); 728} 729 730void 731infohandler(int sig __unused) 732{ 733 got_siginfo = 1; 734} 735 736void 737alarmhandler(int sig __unused) 738{ 739 got_sigalarm = 1; 740} 741