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 34 static 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 40 static 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 73 int restarts; 74 75 static void usage(void) __dead2; 76 static intmax_t argtoimax(int flag, const char *req, const char *str, int base); 77 static int checkfilesys(char *filesys); 78 static int chkdoreload(struct statfs *mntp); 79 static struct statfs *getmntpt(const char *); 80 81 int 82 main(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 } 217 218 static intmax_t 219 argtoimax(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 */ 234 static int 235 checkfilesys(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 int cylno; 247 intmax_t blks, files; 248 size_t size; 249 250 iov = NULL; 251 iovlen = 0; 252 errmsg[0] = '\0'; 253 fsutilinit(); 254 fsckinit(); 255 256 cdevname = filesys; 257 if (debug && ckclean) 258 pwarn("starting\n"); 259 /* 260 * Make best effort to get the disk name. Check first to see 261 * if it is listed among the mounted file systems. Failing that 262 * check to see if it is listed in /etc/fstab. 263 */ 264 mntp = getmntpt(filesys); 265 if (mntp != NULL) 266 filesys = mntp->f_mntfromname; 267 else 268 filesys = blockcheck(filesys); 269 /* 270 * If -F flag specified, check to see whether a background check 271 * is possible and needed. If possible and needed, exit with 272 * status zero. Otherwise exit with status non-zero. A non-zero 273 * exit status will cause a foreground check to be run. 274 */ 275 sblock_init(); 276 if (bkgrdcheck) { 277 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 278 exit(3); /* Cannot read superblock */ 279 close(fsreadfd); 280 /* Earlier background failed or journaled */ 281 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) 282 exit(4); 283 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0) 284 exit(5); /* Not running soft updates */ 285 size = MIBSIZE; 286 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0) 287 exit(6); /* Lacks kernel support */ 288 if ((mntp == NULL && sblock.fs_clean == 1) || 289 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0)) 290 exit(7); /* Filesystem clean, report it now */ 291 exit(0); 292 } 293 if (ckclean && skipclean) { 294 /* 295 * If file system is gjournaled, check it here. 296 */ 297 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0) 298 exit(3); /* Cannot read superblock */ 299 close(fsreadfd); 300 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 301 //printf("GJournaled file system detected on %s.\n", 302 // filesys); 303 if (sblock.fs_clean == 1) { 304 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 305 exit(0); 306 } 307 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 308 gjournal_check(filesys); 309 if (chkdoreload(mntp) == 0) 310 exit(0); 311 exit(4); 312 } else { 313 pfatal( 314 "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n"); 315 } 316 } 317 } 318 /* 319 * If we are to do a background check: 320 * Get the mount point information of the file system 321 * create snapshot file 322 * return created snapshot file 323 * if not found, clear bkgrdflag and proceed with normal fsck 324 */ 325 if (bkgrdflag) { 326 if (mntp == NULL) { 327 bkgrdflag = 0; 328 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n"); 329 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) { 330 bkgrdflag = 0; 331 pfatal( 332 "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n"); 333 } else if ((mntp->f_flags & MNT_RDONLY) != 0) { 334 bkgrdflag = 0; 335 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n"); 336 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) { 337 if (readsb(0) != 0) { 338 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) { 339 bkgrdflag = 0; 340 pfatal( 341 "UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n"); 342 } 343 if ((sblock.fs_flags & FS_UNCLEAN) == 0 && 344 skipclean && ckclean) { 345 /* 346 * file system is clean; 347 * skip snapshot and report it clean 348 */ 349 pwarn( 350 "FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 351 goto clean; 352 } 353 } 354 close(fsreadfd); 355 } 356 if (bkgrdflag) { 357 snprintf(snapname, sizeof snapname, "%s/.snap", 358 mntp->f_mntonname); 359 if (stat(snapname, &snapdir) < 0) { 360 if (errno != ENOENT) { 361 bkgrdflag = 0; 362 pfatal( 363 "CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 364 snapname, strerror(errno)); 365 } else if ((grp = getgrnam("operator")) == NULL || 366 mkdir(snapname, 0770) < 0 || 367 chown(snapname, -1, grp->gr_gid) < 0 || 368 chmod(snapname, 0770) < 0) { 369 bkgrdflag = 0; 370 pfatal( 371 "CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n", 372 snapname, strerror(errno)); 373 } 374 } else if (!S_ISDIR(snapdir.st_mode)) { 375 bkgrdflag = 0; 376 pfatal( 377 "%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n", 378 snapname); 379 } 380 } 381 if (bkgrdflag) { 382 snprintf(snapname, sizeof snapname, 383 "%s/.snap/fsck_snapshot", mntp->f_mntonname); 384 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 385 build_iovec(&iov, &iovlen, "from", snapname, 386 (size_t)-1); 387 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 388 (size_t)-1); 389 build_iovec(&iov, &iovlen, "errmsg", errmsg, 390 sizeof(errmsg)); 391 build_iovec(&iov, &iovlen, "update", NULL, 0); 392 build_iovec(&iov, &iovlen, "snapshot", NULL, 0); 393 394 while (nmount(iov, iovlen, mntp->f_flags) < 0) { 395 if (errno == EEXIST && unlink(snapname) == 0) 396 continue; 397 bkgrdflag = 0; 398 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n", 399 snapname, strerror(errno), errmsg); 400 break; 401 } 402 if (bkgrdflag != 0) 403 filesys = snapname; 404 } 405 } 406 407 switch (setup(filesys)) { 408 case 0: 409 if (preen) 410 pfatal("CAN'T CHECK FILE SYSTEM."); 411 return (EEXIT); 412 case -1: 413 clean: 414 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree + 415 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree)); 416 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n", 417 (intmax_t)sblock.fs_cstotal.cs_nffree, 418 (intmax_t)sblock.fs_cstotal.cs_nbfree, 419 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize); 420 return (0); 421 } 422 /* 423 * Determine if we can and should do journal recovery. 424 */ 425 if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) { 426 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) { 427 if (suj_check(filesys) == 0) { 428 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n"); 429 if (chkdoreload(mntp) == 0) 430 exit(0); 431 exit(4); 432 } 433 printf("** Skipping journal, falling through to full fsck\n\n"); 434 } 435 /* 436 * Write the superblock so we don't try to recover the 437 * journal on another pass. If this is the only change 438 * to the filesystem, we do not want it to be called 439 * out as modified. 440 */ 441 sblock.fs_mtime = time(NULL); 442 sbdirty(); 443 ofsmodified = fsmodified; 444 flush(fswritefd, &sblk); 445 fsmodified = ofsmodified; 446 } 447 /* 448 * If the filesystem was run on an old kernel that did not 449 * support check hashes, clear the check-hash flags so that 450 * we do not try to verify them. 451 */ 452 if ((sblock.fs_flags & FS_METACKHASH) == 0) 453 sblock.fs_metackhash = 0; 454 /* 455 * If we are running on a kernel that can provide check hashes 456 * that are not yet enabled for the filesystem and we are 457 * running manually without the -y flag, offer to add any 458 * supported check hashes that are not already enabled. 459 */ 460 ckhashadd = 0; 461 if (preen == 0 && yflag == 0 && sblock.fs_magic != FS_UFS1_MAGIC && 462 fswritefd != -1 && getosreldate() >= P_OSREL_CK_CYLGRP) { 463 if ((sblock.fs_metackhash & CK_CYLGRP) == 0 && 464 reply("ADD CYLINDER GROUP CHECK-HASH PROTECTION") != 0) { 465 ckhashadd |= CK_CYLGRP; 466 sblock.fs_metackhash |= CK_CYLGRP; 467 } 468 if ((sblock.fs_metackhash & CK_SUPERBLOCK) == 0 && 469 getosreldate() >= P_OSREL_CK_SUPERBLOCK && 470 reply("ADD SUPERBLOCK CHECK-HASH PROTECTION") != 0) { 471 ckhashadd |= CK_SUPERBLOCK; 472 sblock.fs_metackhash |= CK_SUPERBLOCK; 473 } 474 if ((sblock.fs_metackhash & CK_INODE) == 0 && 475 getosreldate() >= P_OSREL_CK_INODE && 476 reply("ADD INODE CHECK-HASH PROTECTION") != 0) { 477 ckhashadd |= CK_INODE; 478 sblock.fs_metackhash |= CK_INODE; 479 } 480 #ifdef notyet 481 if ((sblock.fs_metackhash & CK_INDIR) == 0 && 482 getosreldate() >= P_OSREL_CK_INDIR && 483 reply("ADD INDIRECT BLOCK CHECK-HASH PROTECTION") != 0) { 484 ckhashadd |= CK_INDIR; 485 sblock.fs_metackhash |= CK_INDIR; 486 } 487 if ((sblock.fs_metackhash & CK_DIR) == 0 && 488 getosreldate() >= P_OSREL_CK_DIR && 489 reply("ADD DIRECTORY CHECK-HASH PROTECTION") != 0) { 490 ckhashadd |= CK_DIR; 491 sblock.fs_metackhash |= CK_DIR; 492 } 493 #endif /* notyet */ 494 if (ckhashadd != 0) { 495 sblock.fs_flags |= FS_METACKHASH; 496 sbdirty(); 497 } 498 } 499 /* 500 * Cleared if any questions answered no. Used to decide if 501 * the superblock should be marked clean. 502 */ 503 resolved = 1; 504 /* 505 * 1: scan inodes tallying blocks used 506 */ 507 if (preen == 0) { 508 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 509 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 510 printf("** Root file system\n"); 511 printf("** Phase 1 - Check Blocks and Sizes\n"); 512 } 513 clock_gettime(CLOCK_REALTIME_PRECISE, &startprog); 514 pass1(); 515 IOstats("Pass1"); 516 517 /* 518 * 1b: locate first references to duplicates, if any 519 */ 520 if (duplist) { 521 if (preen || usedsoftdep) 522 pfatal("INTERNAL ERROR: dups with %s%s%s", 523 preen ? "-p" : "", 524 (preen && usedsoftdep) ? " and " : "", 525 usedsoftdep ? "softupdates" : ""); 526 printf("** Phase 1b - Rescan For More DUPS\n"); 527 pass1b(); 528 IOstats("Pass1b"); 529 } 530 531 /* 532 * 2: traverse directories from root to mark all connected directories 533 */ 534 if (preen == 0) 535 printf("** Phase 2 - Check Pathnames\n"); 536 pass2(); 537 IOstats("Pass2"); 538 539 /* 540 * 3: scan inodes looking for disconnected directories 541 */ 542 if (preen == 0) 543 printf("** Phase 3 - Check Connectivity\n"); 544 pass3(); 545 IOstats("Pass3"); 546 547 /* 548 * 4: scan inodes looking for disconnected files; check reference counts 549 */ 550 if (preen == 0) 551 printf("** Phase 4 - Check Reference Counts\n"); 552 pass4(); 553 IOstats("Pass4"); 554 555 /* 556 * 5: check and repair resource counts in cylinder groups 557 */ 558 if (preen == 0) 559 printf("** Phase 5 - Check Cyl groups\n"); 560 pass5(); 561 IOstats("Pass5"); 562 563 /* 564 * print out summary statistics 565 */ 566 n_ffree = sblock.fs_cstotal.cs_nffree; 567 n_bfree = sblock.fs_cstotal.cs_nbfree; 568 files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 569 blks = n_blks + 570 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 571 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 572 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 573 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 574 if (bkgrdflag && (files > 0 || blks > 0)) { 575 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 576 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n", 577 countdirs, files - countdirs, blks); 578 } 579 pwarn("%ld files, %jd used, %ju free ", 580 (long)n_files, (intmax_t)n_blks, 581 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 582 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 583 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 584 n_ffree * 100.0 / sblock.fs_dsize); 585 if (debug) { 586 if (files < 0) 587 printf("%jd inodes missing\n", -files); 588 if (blks < 0) 589 printf("%jd blocks missing\n", -blks); 590 if (duplist != NULL) { 591 printf("The following duplicate blocks remain:"); 592 for (dp = duplist; dp; dp = dp->next) 593 printf(" %jd,", (intmax_t)dp->dup); 594 printf("\n"); 595 } 596 } 597 duplist = (struct dups *)0; 598 muldup = (struct dups *)0; 599 inocleanup(); 600 if (fsmodified) { 601 sblock.fs_time = time(NULL); 602 sbdirty(); 603 } 604 if (cvtlevel && sblk.b_dirty) { 605 /* 606 * Write out the duplicate super blocks 607 */ 608 if (sbput(fswritefd, &sblock, sblock.fs_ncg) == 0) 609 fsmodified = 1; 610 } 611 if (rerun) 612 resolved = 0; 613 finalIOstats(); 614 615 /* 616 * Check to see if the file system is mounted read-write. 617 */ 618 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 619 resolved = 0; 620 ckfini(resolved); 621 622 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) 623 if (inostathead[cylno].il_stat != NULL) 624 free((char *)inostathead[cylno].il_stat); 625 free((char *)inostathead); 626 inostathead = NULL; 627 if (fsmodified && !preen) 628 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 629 if (rerun) { 630 if (wantrestart && (restarts++ < 10) && 631 (preen || reply("RESTART"))) 632 return (ERESTART); 633 printf("\n***** PLEASE RERUN FSCK *****\n"); 634 } 635 if (chkdoreload(mntp) != 0) { 636 if (!fsmodified) 637 return (0); 638 if (!preen) 639 printf("\n***** REBOOT NOW *****\n"); 640 sync(); 641 return (4); 642 } 643 return (rerun ? ERERUN : 0); 644 } 645 646 static int 647 chkdoreload(struct statfs *mntp) 648 { 649 struct iovec *iov; 650 int iovlen; 651 char errmsg[255]; 652 653 if (mntp == NULL) 654 return (0); 655 656 iov = NULL; 657 iovlen = 0; 658 errmsg[0] = '\0'; 659 /* 660 * We modified a mounted file system. Do a mount update on 661 * it unless it is read-write, so we can continue using it 662 * as safely as possible. 663 */ 664 if (mntp->f_flags & MNT_RDONLY) { 665 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 666 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 667 (size_t)-1); 668 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 669 (size_t)-1); 670 build_iovec(&iov, &iovlen, "errmsg", errmsg, 671 sizeof(errmsg)); 672 build_iovec(&iov, &iovlen, "update", NULL, 0); 673 build_iovec(&iov, &iovlen, "reload", NULL, 0); 674 /* 675 * XX: We need the following line until we clean up 676 * nmount parsing of root mounts and NFS root mounts. 677 */ 678 build_iovec(&iov, &iovlen, "ro", NULL, 0); 679 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 680 return (0); 681 } 682 pwarn("mount reload of '%s' failed: %s %s\n\n", 683 mntp->f_mntonname, strerror(errno), errmsg); 684 return (1); 685 } 686 return (0); 687 } 688 689 /* 690 * Get the mount point information for name. 691 */ 692 static struct statfs * 693 getmntpt(const char *name) 694 { 695 struct stat devstat, mntdevstat; 696 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 697 char *ddevname; 698 struct statfs *mntbuf, *statfsp; 699 int i, mntsize, isdev; 700 701 if (stat(name, &devstat) != 0) 702 return (NULL); 703 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 704 isdev = 1; 705 else 706 isdev = 0; 707 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 708 for (i = 0; i < mntsize; i++) { 709 statfsp = &mntbuf[i]; 710 ddevname = statfsp->f_mntfromname; 711 if (*ddevname != '/') { 712 if (strlen(_PATH_DEV) + strlen(ddevname) + 1 > 713 sizeof(statfsp->f_mntfromname)) 714 continue; 715 strcpy(device, _PATH_DEV); 716 strcat(device, ddevname); 717 strcpy(statfsp->f_mntfromname, device); 718 } 719 if (isdev == 0) { 720 if (strcmp(name, statfsp->f_mntonname)) 721 continue; 722 return (statfsp); 723 } 724 if (stat(ddevname, &mntdevstat) == 0 && 725 mntdevstat.st_rdev == devstat.st_rdev) 726 return (statfsp); 727 } 728 statfsp = NULL; 729 return (statfsp); 730 } 731 732 static void 733 usage(void) 734 { 735 (void) fprintf(stderr, 736 "usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n", 737 getprogname()); 738 exit(1); 739 } 740 741 void 742 infohandler(int sig __unused) 743 { 744 got_siginfo = 1; 745 } 746 747 void 748 alarmhandler(int sig __unused) 749 { 750 got_sigalarm = 1; 751 } 752