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 static 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 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 (bkgrdflag == 0 && 299 (nflag || (fswritefd = open(filesys, O_WRONLY)) < 0)) { 300 fswritefd = -1; 301 if (preen) 302 pfatal("NO WRITE ACCESS"); 303 printf(" (NO WRITE)"); 304 } 305 if ((sblock.fs_flags & FS_GJOURNAL) != 0) { 306 if (sblock.fs_clean == 1) { 307 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 308 exit(0); 309 } 310 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) { 311 bufinit(); 312 gjournal_check(filesys); 313 if (chkdoreload(mntp) == 0) 314 exit(0); 315 exit(4); 316 } else { 317 pfatal("UNEXPECTED INCONSISTENCY, CANNOT RUN " 318 "FAST FSCK\n"); 319 } 320 } 321 close(fsreadfd); 322 close(fswritefd); 323 } 324 /* 325 * If we are to do a background check: 326 * Get the mount point information of the file system 327 * create snapshot file 328 * return created snapshot file 329 * if not found, clear bkgrdflag and proceed with normal fsck 330 */ 331 if (bkgrdflag) { 332 /* Get the mount point information of the file system */ 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("NOT USING SOFT UPDATES, CANNOT RUN IN " 339 "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 if (fswritefd != -1) { 445 /* 446 * Write the superblock so we don't try to recover the 447 * journal on another pass. If this is the only change 448 * to the filesystem, we do not want it to be called 449 * out as modified. 450 */ 451 sblock.fs_mtime = time(NULL); 452 sbdirty(); 453 ofsmodified = fsmodified; 454 flush(fswritefd, &sblk); 455 fsmodified = ofsmodified; 456 } 457 } 458 /* 459 * If the filesystem was run on an old kernel that did not 460 * support check hashes, clear the check-hash flags so that 461 * we do not try to verify them. 462 */ 463 if ((sblock.fs_flags & FS_METACKHASH) == 0) 464 sblock.fs_metackhash = 0; 465 /* 466 * If we are running on a kernel that can provide check hashes 467 * that are not yet enabled for the filesystem and we are 468 * running manually without the -y flag, offer to add any 469 * supported check hashes that are not already enabled. 470 */ 471 ckhashadd = 0; 472 if (preen == 0 && yflag == 0 && sblock.fs_magic != FS_UFS1_MAGIC && 473 fswritefd != -1 && getosreldate() >= P_OSREL_CK_CYLGRP) { 474 if ((sblock.fs_metackhash & CK_CYLGRP) == 0 && 475 reply("ADD CYLINDER GROUP CHECK-HASH PROTECTION") != 0) { 476 ckhashadd |= CK_CYLGRP; 477 sblock.fs_metackhash |= CK_CYLGRP; 478 } 479 if ((sblock.fs_metackhash & CK_SUPERBLOCK) == 0 && 480 getosreldate() >= P_OSREL_CK_SUPERBLOCK && 481 reply("ADD SUPERBLOCK CHECK-HASH PROTECTION") != 0) { 482 ckhashadd |= CK_SUPERBLOCK; 483 sblock.fs_metackhash |= CK_SUPERBLOCK; 484 } 485 if ((sblock.fs_metackhash & CK_INODE) == 0 && 486 getosreldate() >= P_OSREL_CK_INODE && 487 reply("ADD INODE CHECK-HASH PROTECTION") != 0) { 488 ckhashadd |= CK_INODE; 489 sblock.fs_metackhash |= CK_INODE; 490 } 491 #ifdef notyet 492 if ((sblock.fs_metackhash & CK_INDIR) == 0 && 493 getosreldate() >= P_OSREL_CK_INDIR && 494 reply("ADD INDIRECT BLOCK CHECK-HASH PROTECTION") != 0) { 495 ckhashadd |= CK_INDIR; 496 sblock.fs_metackhash |= CK_INDIR; 497 } 498 if ((sblock.fs_metackhash & CK_DIR) == 0 && 499 getosreldate() >= P_OSREL_CK_DIR && 500 reply("ADD DIRECTORY CHECK-HASH PROTECTION") != 0) { 501 ckhashadd |= CK_DIR; 502 sblock.fs_metackhash |= CK_DIR; 503 } 504 #endif /* notyet */ 505 if (ckhashadd != 0) { 506 sblock.fs_flags |= FS_METACKHASH; 507 sbdirty(); 508 } 509 } 510 /* 511 * Cleared if any questions answered no. Used to decide if 512 * the superblock should be marked clean. 513 */ 514 resolved = 1; 515 /* 516 * 1: scan inodes tallying blocks used 517 */ 518 if (preen == 0) { 519 printf("** Last Mounted on %s\n", sblock.fs_fsmnt); 520 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS) 521 printf("** Root file system\n"); 522 printf("** Phase 1 - Check Blocks and Sizes\n"); 523 } 524 clock_gettime(CLOCK_REALTIME_PRECISE, &startprog); 525 pass1(); 526 IOstats("Pass1"); 527 528 /* 529 * 1b: locate first references to duplicates, if any 530 */ 531 if (duplist) { 532 if (preen || usedsoftdep) 533 pfatal("INTERNAL ERROR: DUPS WITH %s%s%s", 534 preen ? "-p" : "", 535 (preen && usedsoftdep) ? " AND " : "", 536 usedsoftdep ? "SOFTUPDATES" : ""); 537 printf("** Phase 1b - Rescan For More DUPS\n"); 538 pass1b(); 539 IOstats("Pass1b"); 540 } 541 542 /* 543 * 2: traverse directories from root to mark all connected directories 544 */ 545 if (preen == 0) 546 printf("** Phase 2 - Check Pathnames\n"); 547 pass2(); 548 IOstats("Pass2"); 549 550 /* 551 * 3: scan inodes looking for disconnected directories 552 */ 553 if (preen == 0) 554 printf("** Phase 3 - Check Connectivity\n"); 555 pass3(); 556 IOstats("Pass3"); 557 558 /* 559 * 4: scan inodes looking for disconnected files; check reference counts 560 */ 561 if (preen == 0) 562 printf("** Phase 4 - Check Reference Counts\n"); 563 pass4(); 564 IOstats("Pass4"); 565 566 /* 567 * 5: check and repair resource counts in cylinder groups 568 */ 569 if (preen == 0) 570 printf("** Phase 5 - Check Cyl groups\n"); 571 pass5(); 572 IOstats("Pass5"); 573 574 /* 575 * print out summary statistics 576 */ 577 n_ffree = sblock.fs_cstotal.cs_nffree; 578 n_bfree = sblock.fs_cstotal.cs_nbfree; 579 files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files; 580 blks = n_blks + 581 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0)); 582 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0); 583 blks += howmany(sblock.fs_cssize, sblock.fs_fsize); 584 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks; 585 if (bkgrdflag && (files > 0 || blks > 0)) { 586 countdirs = sblock.fs_cstotal.cs_ndir - countdirs; 587 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n", 588 countdirs, files - countdirs, blks); 589 } 590 pwarn("%ld files, %jd used, %ju free ", 591 (long)n_files, (intmax_t)n_blks, 592 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree); 593 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n", 594 (uintmax_t)n_ffree, (uintmax_t)n_bfree, 595 n_ffree * 100.0 / sblock.fs_dsize); 596 if (debug) { 597 if (files < 0) 598 printf("%jd inodes missing\n", -files); 599 if (blks < 0) 600 printf("%jd blocks missing\n", -blks); 601 if (duplist != NULL) { 602 printf("The following duplicate blocks remain:"); 603 for (dp = duplist; dp; dp = dp->next) 604 printf(" %jd,", (intmax_t)dp->dup); 605 printf("\n"); 606 } 607 } 608 duplist = (struct dups *)0; 609 muldup = (struct dups *)0; 610 inocleanup(); 611 if (fsmodified) { 612 sblock.fs_time = time(NULL); 613 sbdirty(); 614 } 615 if (cvtlevel && (sblk.b_flags & B_DIRTY) != 0) { 616 /* 617 * Write out the duplicate super blocks 618 */ 619 if (sbput(fswritefd, &sblock, sblock.fs_ncg) == 0) 620 fsmodified = 1; 621 } 622 if (rerun) 623 resolved = 0; 624 625 /* 626 * Check to see if the file system is mounted read-write. 627 */ 628 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0) 629 resolved = 0; 630 ckfini(resolved); 631 632 if (fsmodified && !preen) 633 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 634 if (rerun) { 635 if (wantrestart && (restarts++ < 10) && 636 (preen || reply("RESTART"))) 637 return (ERESTART); 638 printf("\n***** PLEASE RERUN FSCK *****\n"); 639 } 640 if (chkdoreload(mntp) != 0) { 641 if (!fsmodified) 642 return (0); 643 if (!preen) 644 printf("\n***** REBOOT NOW *****\n"); 645 sync(); 646 return (4); 647 } 648 return (rerun ? ERERUN : 0); 649 } 650 651 static int 652 chkdoreload(struct statfs *mntp) 653 { 654 struct iovec *iov; 655 int iovlen; 656 char errmsg[255]; 657 658 if (mntp == NULL) 659 return (0); 660 661 iov = NULL; 662 iovlen = 0; 663 errmsg[0] = '\0'; 664 /* 665 * We modified a mounted file system. Do a mount update on 666 * it unless it is read-write, so we can continue using it 667 * as safely as possible. 668 */ 669 if (mntp->f_flags & MNT_RDONLY) { 670 build_iovec(&iov, &iovlen, "fstype", "ffs", 4); 671 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname, 672 (size_t)-1); 673 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, 674 (size_t)-1); 675 build_iovec(&iov, &iovlen, "errmsg", errmsg, 676 sizeof(errmsg)); 677 build_iovec(&iov, &iovlen, "update", NULL, 0); 678 build_iovec(&iov, &iovlen, "reload", NULL, 0); 679 /* 680 * XX: We need the following line until we clean up 681 * nmount parsing of root mounts and NFS root mounts. 682 */ 683 build_iovec(&iov, &iovlen, "ro", NULL, 0); 684 if (nmount(iov, iovlen, mntp->f_flags) == 0) { 685 return (0); 686 } 687 pwarn("mount reload of '%s' failed: %s %s\n\n", 688 mntp->f_mntonname, strerror(errno), errmsg); 689 return (1); 690 } 691 return (0); 692 } 693 694 /* 695 * Get the mount point information for name. 696 */ 697 static struct statfs * 698 getmntpt(const char *name) 699 { 700 struct stat devstat, mntdevstat; 701 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN]; 702 char *ddevname; 703 struct statfs *mntbuf, *statfsp; 704 int i, mntsize, isdev; 705 706 if (stat(name, &devstat) != 0) 707 return (NULL); 708 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)) 709 isdev = 1; 710 else 711 isdev = 0; 712 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 713 for (i = 0; i < mntsize; i++) { 714 statfsp = &mntbuf[i]; 715 ddevname = statfsp->f_mntfromname; 716 if (*ddevname != '/') { 717 if (strlen(_PATH_DEV) + strlen(ddevname) + 1 > 718 sizeof(statfsp->f_mntfromname)) 719 continue; 720 strcpy(device, _PATH_DEV); 721 strcat(device, ddevname); 722 strcpy(statfsp->f_mntfromname, device); 723 } 724 if (isdev == 0) { 725 if (strcmp(name, statfsp->f_mntonname)) 726 continue; 727 return (statfsp); 728 } 729 if (stat(ddevname, &mntdevstat) == 0 && 730 mntdevstat.st_rdev == devstat.st_rdev) 731 return (statfsp); 732 } 733 statfsp = NULL; 734 return (statfsp); 735 } 736 737 static void 738 usage(void) 739 { 740 (void) fprintf(stderr, 741 "usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n", 742 getprogname()); 743 exit(1); 744 } 745 746 void 747 infohandler(int sig __unused) 748 { 749 got_siginfo = 1; 750 } 751 752 void 753 alarmhandler(int sig __unused) 754 { 755 got_sigalarm = 1; 756 } 757