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 <libufs.h> 65#include <mntopts.h> 66#include <paths.h> 67#include <stdint.h> 68#include <string.h> 69#include <time.h> 70 71#include "fsck.h" 72 73static int restarts; 74 75static void usage(void) __dead2; 76static intmax_t argtoimax(int flag, const char *req, const char *str, int base); 77static int checkfilesys(char *filesys); 78static int chkdoreload(struct statfs *mntp); 79static struct statfs *getmntpt(const char *); 80 81int 82main(int argc, char *argv[]) 83{ 84 int ch; 85 struct rlimit rlimit; 86 struct itimerval itimerval; 87 int fsret; 88 int ret = 0; 89 90 sync(); 91 skipclean = 1; 92 inoopt = 0; 93 while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npRrSyZz")) != -1) { 94 switch (ch) { 95 case 'b': 96 skipclean = 0; 97 bflag = argtoimax('b', "number", optarg, 10); 98 printf("Alternate super block location: %jd\n", bflag); 99 break; 100 101 case 'B': 102 bkgrdflag = 1; 103 break; 104 105 case 'c': 106 skipclean = 0; 107 cvtlevel = argtoimax('c', "conversion level", optarg, 108 10); 109 if (cvtlevel < 3) 110 errx(EEXIT, "cannot do level %d conversion", 111 cvtlevel); 112 break; 113 114 case 'd': 115 debug++; 116 break; 117 118 case 'E': 119 Eflag++; 120 break; 121 122 case 'f': 123 skipclean = 0; 124 break; 125 126 case 'F': 127 bkgrdcheck = 1; 128 break; 129 130 case 'm': 131 lfmode = argtoimax('m', "mode", optarg, 8); 132 if (lfmode &~ 07777) 133 errx(EEXIT, "bad mode to -m: %o", lfmode); 134 printf("** lost+found creation mode %o\n", lfmode); 135 break; 136 137 case 'n': 138 nflag++; 139 yflag = 0; 140 break; 141 142 case 'p': 143 preen++; 144 /*FALLTHROUGH*/ 145 146 case 'C': 147 ckclean++; 148 break; 149 150 case 'R': 151 wantrestart = 1; 152 break; 153 case 'r': 154 inoopt++; 155 break; 156 157 case 'S': 158 surrender = 1; 159 break; 160 161 case 'y': 162 yflag++; 163 nflag = 0; 164 break; 165 166 case 'Z': 167 Zflag++; 168 break; 169 170 case 'z': 171 zflag++; 172 break; 173 174 default: 175 usage(); 176 } 177 } 178 argc -= optind; 179 argv += optind; 180 181 if (!argc) 182 usage(); 183 184 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 185 (void)signal(SIGINT, catch); 186 if (ckclean) 187 (void)signal(SIGQUIT, catchquit); 188 signal(SIGINFO, infohandler); 189 if (bkgrdflag) { 190 signal(SIGALRM, alarmhandler); 191 itimerval.it_interval.tv_sec = 5; 192 itimerval.it_interval.tv_usec = 0; 193 itimerval.it_value.tv_sec = 5; 194 itimerval.it_value.tv_usec = 0; 195 setitimer(ITIMER_REAL, &itimerval, NULL); 196 } 197 /* 198 * Push up our allowed memory limit so we can cope 199 * with huge file systems. 200 */ 201 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) { 202 rlimit.rlim_cur = rlimit.rlim_max; 203 (void)setrlimit(RLIMIT_DATA, &rlimit); 204 } 205 while (argc > 0) { 206 if ((fsret = checkfilesys(*argv)) == ERESTART) 207 continue; 208 ret |= fsret; 209 argc--; 210 argv++; 211 } 212 213 if (returntosingle) 214 ret = 2; 215 exit(ret); 216} 217 218static intmax_t 219argtoimax(int flag, const char *req, const char *str, int base) 220{ 221 char *cp; 222 intmax_t ret; 223 224 ret = strtoimax(str, &cp, base); 225 if (cp == str || *cp) 226 errx(EEXIT, "-%c flag requires a %s", flag, req); 227 return (ret); 228} 229 230/* 231 * Check the specified file system. 232 */ 233/* ARGSUSED */ 234static int 235checkfilesys(char *filesys) 236{ 237 ufs2_daddr_t n_ffree, n_bfree; 238 struct dups *dp; 239 struct statfs *mntp; 240 struct stat snapdir; 241 struct group *grp; 242 struct iovec *iov; 243 char errmsg[255]; 244 int ofsmodified; 245 int iovlen; 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 if (nflag || (fswritefd = open(filesys, O_WRONLY)) < 0) { 299 fswritefd = -1; 300 if (preen) 301 pfatal("NO WRITE ACCESS"); 302 printf(" (NO WRITE)"); 303 } 304 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 305 //printf("GJournaled file system detected on %s.\n", 306 // filesys); 307 if (sblock.fs_clean == 1) { 308 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 309 exit(0); 310 } 311 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 312 bufinit(); 313 gjournal_check(filesys); 314 if (chkdoreload(mntp) == 0) 315 exit(0); 316 exit(4); 317 } else { 318 pfatal( 319 "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n"); 320 close(fsreadfd); 321 close(fswritefd); 322 } 323 } 324 } 325 /* 326 * If we are to do a background check: 327 * Get the mount point information of the file system 328 * create snapshot file 329 * return created snapshot file 330 * if not found, clear bkgrdflag and proceed with normal fsck 331 */ 332 if (bkgrdflag) { 333 if (mntp == NULL) { 334 bkgrdflag = 0; 335 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 336 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 337 bkgrdflag = 0; 338 pfatal( 339 "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n"); 340 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 341 bkgrdflag = 0; 342 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 343 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 344 if (readsb(0) != 0) { 345 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) { 346 bkgrdflag = 0; 347 pfatal( 348 "UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n"); 349 } 350 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 351 skipclean && ckclean) { 352 /* 353 * file system is clean; 354 * skip snapshot and report it clean 355 */ 356 pwarn( 357 "FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 358 goto clean; 359 } 360 } 361 close(fsreadfd); 362 } 363 if (bkgrdflag) { 364 snprintf(snapname, sizeof snapname, "%s/.snap", 365 mntp->f_mntonname); 366 if (stat(snapname, &snapdir) < 0) { 367 if (errno != ENOENT) { 368 bkgrdflag = 0; 369 pfatal( 370 "CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 371 snapname, strerror(errno)); 372 } else if ((grp = getgrnam("operator")) == NULL || 373 mkdir(snapname, 0770) < 0 || 374 chown(snapname, -1, grp->gr_gid) < 0 || 375 chmod(snapname, 0770) < 0) { 376 bkgrdflag = 0; 377 pfatal( 378 "CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 379 snapname, strerror(errno)); 380 } 381 } else if (!S_ISDIR(snapdir.st_mode)) { 382 bkgrdflag = 0; 383 pfatal( 384 "%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n", 385 snapname); 386 } 387 } 388 if (bkgrdflag) { 389 snprintf(snapname, sizeof snapname, 390 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 391 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 392 build_iovec(&iov, &iovlen, "from", snapname, 393 (size_t)-1); 394 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 395 (size_t)-1); 396 build_iovec(&iov, &iovlen, "errmsg", errmsg, 397 sizeof(errmsg)); 398 build_iovec(&iov, &iovlen, "update", NULL, 0); 399 build_iovec(&iov, &iovlen, "snapshot", NULL, 0); 400 401 while (nmount(iov, iovlen, mntp->f_flags) < 0) { 402 if (errno == EEXIST && unlink(snapname) == 0) 403 continue; 404 bkgrdflag = 0; 405 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n", 406 snapname, strerror(errno), errmsg); 407 break; 408 } 409 if (bkgrdflag != 0) 410 filesys = snapname; 411 } 412 } 413 414 switch (setup(filesys)) { 415 case 0: 416 if (preen) 417 pfatal("CAN'T CHECK FILE SYSTEM."); 418 return (EEXIT); 419 case -1: 420 clean: 421 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 422 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 423 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n", 424 (intmax_t)sblock.fs_cstotal.cs_nffree, 425 (intmax_t)sblock.fs_cstotal.cs_nbfree, 426 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 427 return (0); 428 } 429 /* 430 * Determine if we can and should do journal recovery. 431 */ 432 if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) { 433 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) { 434 sujrecovery = 1; 435 if (suj_check(filesys) == 0) { 436 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n"); 437 if (chkdoreload(mntp) == 0) 438 exit(0); 439 exit(4); 440 } 441 sujrecovery = 0; 442 printf("** Skipping journal, falling through to full fsck\n\n"); 443 } 444 /* 445 * Write the superblock so we don't try to recover the 446 * journal on another pass. If this is the only change 447 * to the filesystem, we do not want it to be called 448 * out as modified. 449 */ 450 sblock.fs_mtime = time(NULL); 451 sbdirty(); 452 ofsmodified = fsmodified; 453 flush(fswritefd, &sblk); 454 fsmodified = ofsmodified; 455 } 456 /* 457 * If the filesystem was run on an old kernel that did not 458 * support check hashes, clear the check-hash flags so that 459 * we do not try to verify them. 460 */ 461 if ((sblock.fs_flags & FS_METACKHASH) == 0) 462 sblock.fs_metackhash = 0; 463 /* 464 * If we are running on a kernel that can provide check hashes 465 * that are not yet enabled for the filesystem and we are 466 * running manually without the -y flag, offer to add any 467 * supported check hashes that are not already enabled. 468 */ 469 ckhashadd = 0; 470 if (preen == 0 && yflag == 0 && sblock.fs_magic != FS_UFS1_MAGIC && 471 fswritefd != -1 && getosreldate() >= P_OSREL_CK_CYLGRP) { 472 if ((sblock.fs_metackhash & CK_CYLGRP) == 0 && 473 reply("ADD CYLINDER GROUP CHECK-HASH PROTECTION") != 0) { 474 ckhashadd |= CK_CYLGRP; 475 sblock.fs_metackhash |= CK_CYLGRP; 476 } 477 if ((sblock.fs_metackhash & CK_SUPERBLOCK) == 0 && 478 getosreldate() >= P_OSREL_CK_SUPERBLOCK && 479 reply("ADD SUPERBLOCK CHECK-HASH PROTECTION") != 0) { 480 ckhashadd |= CK_SUPERBLOCK; 481 sblock.fs_metackhash |= CK_SUPERBLOCK; 482 } 483 if ((sblock.fs_metackhash & CK_INODE) == 0 && 484 getosreldate() >= P_OSREL_CK_INODE && 485 reply("ADD INODE CHECK-HASH PROTECTION") != 0) { 486 ckhashadd |= CK_INODE; 487 sblock.fs_metackhash |= CK_INODE; 488 } 489#ifdef notyet 490 if ((sblock.fs_metackhash & CK_INDIR) == 0 && 491 getosreldate() >= P_OSREL_CK_INDIR && 492 reply("ADD INDIRECT BLOCK CHECK-HASH PROTECTION") != 0) { 493 ckhashadd |= CK_INDIR; 494 sblock.fs_metackhash |= CK_INDIR; 495 } 496 if ((sblock.fs_metackhash & CK_DIR) == 0 && 497 getosreldate() >= P_OSREL_CK_DIR && 498 reply("ADD DIRECTORY CHECK-HASH PROTECTION") != 0) { 499 ckhashadd |= CK_DIR; 500 sblock.fs_metackhash |= CK_DIR; 501 } 502#endif /* notyet */ 503 if (ckhashadd != 0) { 504 sblock.fs_flags |= FS_METACKHASH; 505 sbdirty(); 506 } 507 } 508 /* 509 * Cleared if any questions answered no. Used to decide if 510 * the superblock should be marked clean. 511 */ 512 resolved = 1; 513 /* 514 * 1: scan inodes tallying blocks used 515 */ 516 if (preen == 0) { 517 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 518 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 519 printf("** Root file system\n"); 520 printf("** Phase 1 - Check Blocks and Sizes\n"); 521 } 522 clock_gettime(CLOCK_REALTIME_PRECISE, &startprog); 523 pass1(); 524 IOstats("Pass1"); 525 526 /* 527 * 1b: locate first references to duplicates, if any 528 */ 529 if (duplist) { 530 if (preen || usedsoftdep) 531 pfatal("INTERNAL ERROR: dups with %s%s%s", 532 preen ? "-p" : "", 533 (preen && usedsoftdep) ? " and " : "", 534 usedsoftdep ? "softupdates" : ""); 535 printf("** Phase 1b - Rescan For More DUPS\n"); 536 pass1b(); 537 IOstats("Pass1b"); 538 } 539 540 /* 541 * 2: traverse directories from root to mark all connected directories 542 */ 543 if (preen == 0) 544 printf("** Phase 2 - Check Pathnames\n"); 545 pass2(); 546 IOstats("Pass2"); 547 548 /* 549 * 3: scan inodes looking for disconnected directories 550 */ 551 if (preen == 0) 552 printf("** Phase 3 - Check Connectivity\n"); 553 pass3(); 554 IOstats("Pass3"); 555 556 /* 557 * 4: scan inodes looking for disconnected files; check reference counts 558 */ 559 if (preen == 0) 560 printf("** Phase 4 - Check Reference Counts\n"); 561 pass4(); 562 IOstats("Pass4"); 563 564 /* 565 * 5: check and repair resource counts in cylinder groups 566 */ 567 if (preen == 0) 568 printf("** Phase 5 - Check Cyl groups\n"); 569 pass5(); 570 IOstats("Pass5"); 571 572 /* 573 * print out summary statistics 574 */ 575 n_ffree = sblock.fs_cstotal.cs_nffree; 576 n_bfree = sblock.fs_cstotal.cs_nbfree; 577 files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 578 blks = n_blks + 579 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 580 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 581 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 582 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 583 if (bkgrdflag && (files > 0 || blks > 0)) { 584 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 585 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n", 586 countdirs, files - countdirs, blks); 587 } 588 pwarn("%ld files, %jd used, %ju free ", 589 (long)n_files, (intmax_t)n_blks, 590 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 591 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 592 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 593 n_ffree * 100.0 / sblock.fs_dsize); 594 if (debug) { 595 if (files < 0) 596 printf("%jd inodes missing\n", -files); 597 if (blks < 0) 598 printf("%jd blocks missing\n", -blks); 599 if (duplist != NULL) { 600 printf("The following duplicate blocks remain:"); 601 for (dp = duplist; dp; dp = dp->next) 602 printf(" %jd,", (intmax_t)dp->dup); 603 printf("\n"); 604 } 605 } 606 duplist = (struct dups *)0; 607 muldup = (struct dups *)0; 608 inocleanup(); 609 if (fsmodified) { 610 sblock.fs_time = time(NULL); 611 sbdirty(); 612 } 613 if (cvtlevel && (sblk.b_flags & B_DIRTY) != 0) { 614 /* 615 * Write out the duplicate super blocks 616 */ 617 if (sbput(fswritefd, &sblock, sblock.fs_ncg) == 0) 618 fsmodified = 1; 619 } 620 if (rerun) 621 resolved = 0; 622 623 /* 624 * Check to see if the file system is mounted read-write. 625 */ 626 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 627 resolved = 0; 628 ckfini(resolved); 629 630 if (fsmodified && !preen) 631 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 632 if (rerun) { 633 if (wantrestart && (restarts++ < 10) && 634 (preen || reply("RESTART"))) 635 return (ERESTART); 636 printf("\n***** PLEASE RERUN FSCK *****\n"); 637 } 638 if (chkdoreload(mntp) != 0) { 639 if (!fsmodified) 640 return (0); 641 if (!preen) 642 printf("\n***** REBOOT NOW *****\n"); 643 sync(); 644 return (4); 645 } 646 return (rerun ? ERERUN : 0); 647} 648 649static int 650chkdoreload(struct statfs *mntp) 651{ 652 struct iovec *iov; 653 int iovlen; 654 char errmsg[255]; 655 656 if (mntp == NULL) 657 return (0); 658 659 iov = NULL; 660 iovlen = 0; 661 errmsg[0] = '\0'; 662 /* 663 * We modified a mounted file system. Do a mount update on 664 * it unless it is read-write, so we can continue using it 665 * as safely as possible. 666 */ 667 if (mntp->f_flags & MNT_RDONLY) { 668 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 669 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 670 (size_t)-1); 671 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 672 (size_t)-1); 673 build_iovec(&iov, &iovlen, "errmsg", errmsg, 674 sizeof(errmsg)); 675 build_iovec(&iov, &iovlen, "update", NULL, 0); 676 build_iovec(&iov, &iovlen, "reload", NULL, 0); 677 /* 678 * XX: We need the following line until we clean up 679 * nmount parsing of root mounts and NFS root mounts. 680 */ 681 build_iovec(&iov, &iovlen, "ro", NULL, 0); 682 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 683 return (0); 684 } 685 pwarn("mount reload of '%s' failed: %s %s\n\n", 686 mntp->f_mntonname, strerror(errno), errmsg); 687 return (1); 688 } 689 return (0); 690} 691 692/* 693 * Get the mount point information for name. 694 */ 695static struct statfs * 696getmntpt(const char *name) 697{ 698 struct stat devstat, mntdevstat; 699 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 700 char *ddevname; 701 struct statfs *mntbuf, *statfsp; 702 int i, mntsize, isdev; 703 704 if (stat(name, &devstat) != 0) 705 return (NULL); 706 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 707 isdev = 1; 708 else 709 isdev = 0; 710 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 711 for (i = 0; i < mntsize; i++) { 712 statfsp = &mntbuf[i]; 713 ddevname = statfsp->f_mntfromname; 714 if (*ddevname != '/') { 715 if (strlen(_PATH_DEV) + strlen(ddevname) + 1 > 716 sizeof(statfsp->f_mntfromname)) 717 continue; 718 strcpy(device, _PATH_DEV); 719 strcat(device, ddevname); 720 strcpy(statfsp->f_mntfromname, device); 721 } 722 if (isdev == 0) { 723 if (strcmp(name, statfsp->f_mntonname)) 724 continue; 725 return (statfsp); 726 } 727 if (stat(ddevname, &mntdevstat) == 0 && 728 mntdevstat.st_rdev == devstat.st_rdev) 729 return (statfsp); 730 } 731 statfsp = NULL; 732 return (statfsp); 733} 734 735static void 736usage(void) 737{ 738 (void) fprintf(stderr, 739"usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n", 740 getprogname()); 741 exit(1); 742} 743 744void 745infohandler(int sig __unused) 746{ 747 got_siginfo = 1; 748} 749 750void 751alarmhandler(int sig __unused) 752{ 753 got_sigalarm = 1; 754} 755