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 #define _WANT_P_OSREL
45 #include <sys/param.h>
46 #include <sys/file.h>
47 #include <sys/mount.h>
48 #include <sys/resource.h>
49 #include <sys/stat.h>
50 #include <sys/sysctl.h>
51 #include <sys/uio.h>
52 #include <sys/disklabel.h>
53
54 #include <ufs/ufs/dinode.h>
55 #include <ufs/ffs/fs.h>
56
57 #include <err.h>
58 #include <errno.h>
59 #include <fstab.h>
60 #include <grp.h>
61 #include <inttypes.h>
62 #include <libufs.h>
63 #include <mntopts.h>
64 #include <paths.h>
65 #include <stdint.h>
66 #include <string.h>
67 #include <time.h>
68
69 #include "fsck.h"
70
71 static int restarts;
72 static char snapname[BUFSIZ]; /* when doing snapshots, the name of the file */
73
74 static void usage(void) __dead2;
75 static intmax_t argtoimax(int flag, const char *req, const char *str, int base);
76 static int checkfilesys(char *filesys);
77 static int setup_bkgrdchk(struct statfs *mntp, int sbrdfailed, char **filesys);
78
79 int
main(int argc,char * argv[])80 main(int argc, char *argv[])
81 {
82 int ch;
83 struct rlimit rlimit;
84 struct itimerval itimerval;
85 int fsret;
86 int ret = 0;
87
88 sync();
89 skipclean = 1;
90 inoopt = 0;
91 while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npRrSyZz")) != -1) {
92 switch (ch) {
93 case 'b':
94 skipclean = 0;
95 bflag = argtoimax('b', "number", optarg, 10);
96 printf("Alternate super block location: %jd\n", bflag);
97 break;
98
99 case 'B':
100 bkgrdflag = 1;
101 break;
102
103 case 'c':
104 skipclean = 0;
105 cvtlevel = argtoimax('c', "conversion level", optarg,
106 10);
107 if (cvtlevel < 3)
108 errx(EEXIT, "cannot do level %d conversion",
109 cvtlevel);
110 break;
111
112 case 'd':
113 debug++;
114 break;
115
116 case 'E':
117 Eflag++;
118 break;
119
120 case 'f':
121 skipclean = 0;
122 break;
123
124 case 'F':
125 bkgrdcheck = 1;
126 break;
127
128 case 'm':
129 lfmode = argtoimax('m', "mode", optarg, 8);
130 if (lfmode &~ 07777)
131 errx(EEXIT, "bad mode to -m: %o", lfmode);
132 printf("** lost+found creation mode %o\n", lfmode);
133 break;
134
135 case 'n':
136 nflag++;
137 yflag = 0;
138 break;
139
140 case 'p':
141 preen++;
142 /*FALLTHROUGH*/
143
144 case 'C':
145 ckclean++;
146 break;
147
148 case 'R':
149 wantrestart = 1;
150 break;
151 case 'r':
152 inoopt++;
153 break;
154
155 case 'S':
156 surrender = 1;
157 break;
158
159 case 'y':
160 yflag++;
161 nflag = 0;
162 break;
163
164 case 'Z':
165 Zflag++;
166 break;
167
168 case 'z':
169 zflag++;
170 break;
171
172 default:
173 usage();
174 }
175 }
176 argc -= optind;
177 argv += optind;
178
179 if (!argc)
180 usage();
181
182 if (bkgrdflag && cvtlevel > 0) {
183 pfatal("CANNOT CONVERT A SNAPSHOT\n");
184 exit(EEXIT);
185 }
186
187 if (signal(SIGINT, SIG_IGN) != SIG_IGN)
188 (void)signal(SIGINT, catch);
189 if (ckclean)
190 (void)signal(SIGQUIT, catchquit);
191 signal(SIGINFO, infohandler);
192 if (bkgrdflag) {
193 signal(SIGALRM, alarmhandler);
194 itimerval.it_interval.tv_sec = 5;
195 itimerval.it_interval.tv_usec = 0;
196 itimerval.it_value.tv_sec = 5;
197 itimerval.it_value.tv_usec = 0;
198 setitimer(ITIMER_REAL, &itimerval, NULL);
199 }
200 /*
201 * Push up our allowed memory limit so we can cope
202 * with huge file systems.
203 */
204 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
205 rlimit.rlim_cur = rlimit.rlim_max;
206 (void)setrlimit(RLIMIT_DATA, &rlimit);
207 }
208 while (argc > 0) {
209 if ((fsret = checkfilesys(*argv)) == ERESTART)
210 continue;
211 ret |= fsret;
212 argc--;
213 argv++;
214 }
215
216 if (returntosingle)
217 ret = 2;
218 exit(ret);
219 }
220
221 static intmax_t
argtoimax(int flag,const char * req,const char * str,int base)222 argtoimax(int flag, const char *req, const char *str, int base)
223 {
224 char *cp;
225 intmax_t ret;
226
227 ret = strtoimax(str, &cp, base);
228 if (cp == str || *cp)
229 errx(EEXIT, "-%c flag requires a %s", flag, req);
230 return (ret);
231 }
232
233 /*
234 * Check the specified file system.
235 */
236 /* ARGSUSED */
237 static int
checkfilesys(char * filesys)238 checkfilesys(char *filesys)
239 {
240 ufs2_daddr_t n_ffree, n_bfree;
241 struct dups *dp;
242 struct statfs *mntp;
243 intmax_t blks, files;
244 size_t size;
245 int sbreadfailed, ofsmodified;
246
247 fsutilinit();
248 fsckinit();
249
250 cdevname = filesys;
251 if (debug && ckclean)
252 pwarn("starting\n");
253 /*
254 * Make best effort to get the disk name. Check first to see
255 * if it is listed among the mounted file systems. Failing that
256 * check to see if it is listed in /etc/fstab.
257 */
258 mntp = getmntpoint(filesys);
259 if (mntp != NULL)
260 filesys = mntp->f_mntfromname;
261 else
262 filesys = blockcheck(filesys);
263 /*
264 * If -F flag specified, check to see whether a background check
265 * is possible and needed. If possible and needed, exit with
266 * status zero. Otherwise exit with status non-zero. A non-zero
267 * exit status will cause a foreground check to be run.
268 */
269 sblock_init();
270 sbreadfailed = 0;
271 if (openfilesys(filesys) == 0 || readsb(0) == 0)
272 sbreadfailed = 1;
273 if (bkgrdcheck) {
274 if (sbreadfailed)
275 exit(3); /* Cannot read superblock */
276 if ((sblock.fs_flags & FS_NEEDSFSCK) == FS_NEEDSFSCK)
277 exit(4); /* Earlier background failed */
278 if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) {
279 maxino = sblock.fs_ncg * sblock.fs_ipg;
280 maxfsblock = sblock.fs_size;
281 bufinit();
282 preen = 1;
283 if (suj_check(filesys) == 0)
284 exit(4); /* Journal good, run it now */
285 }
286 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0)
287 exit(5); /* Not running soft updates */
288 size = MIBSIZE;
289 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0)
290 exit(6); /* Lacks kernel support */
291 if ((mntp == NULL && sblock.fs_clean == 1) ||
292 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0))
293 exit(7); /* Filesystem clean, report it now */
294 exit(0);
295 }
296 if (ckclean && skipclean) {
297 /*
298 * If file system is gjournaled, check it here.
299 */
300 if (sbreadfailed)
301 exit(3); /* Cannot read superblock */
302 if (bkgrdflag == 0 &&
303 (nflag || (fswritefd = open(filesys, O_WRONLY)) < 0)) {
304 fswritefd = -1;
305 if (preen)
306 pfatal("NO WRITE ACCESS");
307 printf(" (NO WRITE)");
308 }
309 if ((sblock.fs_flags & FS_GJOURNAL) != 0) {
310 if (sblock.fs_clean == 1) {
311 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
312 exit(0);
313 }
314 if ((sblock.fs_flags &
315 (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) {
316 bufinit();
317 gjournal_check(filesys);
318 if (chkdoreload(mntp, pwarn) == 0)
319 exit(0);
320 exit(4);
321 } else {
322 pfatal("FULL FSCK NEEDED, CANNOT RUN FAST "
323 "FSCK\n");
324 }
325 }
326 close(fswritefd);
327 fswritefd = -1;
328 }
329 if (bkgrdflag) {
330 switch (setup_bkgrdchk(mntp, sbreadfailed, &filesys)) {
331 case -1: /* filesystem clean */
332 goto clean;
333 case 0: /* cannot do background, give up */
334 exit(EEXIT);
335 case 1: /* doing background check, preen rules apply */
336 preen = 1;
337 break;
338 }
339 }
340
341 switch (setup(filesys)) {
342 case 0:
343 if (preen)
344 pfatal("CAN'T CHECK FILE SYSTEM.");
345 return (EEXIT);
346 case -1:
347 clean:
348 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree +
349 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree));
350 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n",
351 (intmax_t)sblock.fs_cstotal.cs_nffree,
352 (intmax_t)sblock.fs_cstotal.cs_nbfree,
353 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
354 return (0);
355 }
356 /*
357 * Determine if we can and should do journal recovery.
358 */
359 if (bkgrdflag == 0 && (sblock.fs_flags & FS_SUJ) == FS_SUJ) {
360 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK &&
361 skipclean) {
362 sujrecovery = 1;
363 if (suj_check(filesys) == 0) {
364 pwarn("\n**** FILE SYSTEM MARKED CLEAN ****\n");
365 if (chkdoreload(mntp, pwarn) == 0)
366 exit(0);
367 exit(4);
368 }
369 sujrecovery = 0;
370 pwarn("Skipping journal, "
371 "falling through to full fsck\n");
372 }
373 if (fswritefd != -1) {
374 /*
375 * Write the superblock so we don't try to recover the
376 * journal on another pass. If this is the only change
377 * to the filesystem, we do not want it to be called
378 * out as modified.
379 */
380 sblock.fs_mtime = time(NULL);
381 sbdirty();
382 ofsmodified = fsmodified;
383 flush(fswritefd, &sblk);
384 fsmodified = ofsmodified;
385 }
386 }
387 /*
388 * If the filesystem was run on an old kernel that did not
389 * support check hashes, clear the check-hash flags so that
390 * we do not try to verify them.
391 */
392 if ((sblock.fs_flags & FS_METACKHASH) == 0)
393 sblock.fs_metackhash = 0;
394 /*
395 * If we are running on a kernel that can provide check hashes
396 * that are not yet enabled for the filesystem and we are
397 * running manually without the -y flag, offer to add any
398 * supported check hashes that are not already enabled.
399 */
400 ckhashadd = 0;
401 if (preen == 0 && yflag == 0 && sblock.fs_magic != FS_UFS1_MAGIC &&
402 fswritefd != -1 && getosreldate() >= P_OSREL_CK_CYLGRP) {
403 if ((sblock.fs_metackhash & CK_CYLGRP) == 0 &&
404 reply("ADD CYLINDER GROUP CHECK-HASH PROTECTION") != 0) {
405 ckhashadd |= CK_CYLGRP;
406 sblock.fs_metackhash |= CK_CYLGRP;
407 }
408 if ((sblock.fs_metackhash & CK_SUPERBLOCK) == 0 &&
409 getosreldate() >= P_OSREL_CK_SUPERBLOCK &&
410 reply("ADD SUPERBLOCK CHECK-HASH PROTECTION") != 0) {
411 ckhashadd |= CK_SUPERBLOCK;
412 sblock.fs_metackhash |= CK_SUPERBLOCK;
413 }
414 if ((sblock.fs_metackhash & CK_INODE) == 0 &&
415 getosreldate() >= P_OSREL_CK_INODE &&
416 reply("ADD INODE CHECK-HASH PROTECTION") != 0) {
417 ckhashadd |= CK_INODE;
418 sblock.fs_metackhash |= CK_INODE;
419 }
420 #ifdef notyet
421 if ((sblock.fs_metackhash & CK_INDIR) == 0 &&
422 getosreldate() >= P_OSREL_CK_INDIR &&
423 reply("ADD INDIRECT BLOCK CHECK-HASH PROTECTION") != 0) {
424 ckhashadd |= CK_INDIR;
425 sblock.fs_metackhash |= CK_INDIR;
426 }
427 if ((sblock.fs_metackhash & CK_DIR) == 0 &&
428 getosreldate() >= P_OSREL_CK_DIR &&
429 reply("ADD DIRECTORY CHECK-HASH PROTECTION") != 0) {
430 ckhashadd |= CK_DIR;
431 sblock.fs_metackhash |= CK_DIR;
432 }
433 #endif /* notyet */
434 if (ckhashadd != 0) {
435 sblock.fs_flags |= FS_METACKHASH;
436 sbdirty();
437 }
438 }
439 /*
440 * Cleared if any questions answered no. Used to decide if
441 * the superblock should be marked clean.
442 */
443 resolved = 1;
444 /*
445 * 1: scan inodes tallying blocks used
446 */
447 if (preen == 0 || debug) {
448 printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
449 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS)
450 printf("** Root file system\n");
451 printf("** Phase 1 - Check Blocks and Sizes\n");
452 }
453 clock_gettime(CLOCK_REALTIME_PRECISE, &startprog);
454 pass1();
455 IOstats("Pass1");
456
457 /*
458 * 1b: locate first references to duplicates, if any
459 */
460 if (duplist) {
461 if (preen || usedsoftdep)
462 pfatal("INTERNAL ERROR: DUPS WITH %s%s%s",
463 preen ? "-p" : "",
464 (preen && usedsoftdep) ? " AND " : "",
465 usedsoftdep ? "SOFTUPDATES" : "");
466 if (preen == 0 || debug)
467 printf("** Phase 1b - Rescan For More DUPS\n");
468 pass1b();
469 IOstats("Pass1b");
470 }
471
472 /*
473 * 2: traverse directories from root to mark all connected directories
474 */
475 if (preen == 0 || debug)
476 printf("** Phase 2 - Check Pathnames\n");
477 pass2();
478 IOstats("Pass2");
479
480 /*
481 * 3: scan inodes looking for disconnected directories
482 */
483 if (preen == 0 || debug)
484 printf("** Phase 3 - Check Connectivity\n");
485 pass3();
486 IOstats("Pass3");
487
488 /*
489 * 4: scan inodes looking for disconnected files; check reference counts
490 */
491 if (preen == 0 || debug)
492 printf("** Phase 4 - Check Reference Counts\n");
493 pass4();
494 IOstats("Pass4");
495
496 /*
497 * 5: check and repair resource counts in cylinder groups
498 */
499 if (preen == 0 || debug)
500 printf("** Phase 5 - Check Cyl groups\n");
501 snapflush(std_checkblkavail);
502 if (cgheader_corrupt) {
503 printf("PHASE 5 SKIPPED DUE TO CORRUPT CYLINDER GROUP "
504 "HEADER(S)\n\n");
505 } else {
506 pass5();
507 IOstats("Pass5");
508 }
509
510 /*
511 * print out summary statistics
512 */
513 n_ffree = sblock.fs_cstotal.cs_nffree;
514 n_bfree = sblock.fs_cstotal.cs_nbfree;
515 files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files;
516 blks = n_blks +
517 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
518 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
519 blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
520 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks;
521 if (bkgrdflag && (files > 0 || blks > 0)) {
522 countdirs = sblock.fs_cstotal.cs_ndir - countdirs;
523 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n",
524 countdirs, files - countdirs, blks);
525 }
526 pwarn("%ld files, %jd used, %ju free ",
527 (long)n_files, (intmax_t)n_blks,
528 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree);
529 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n",
530 (uintmax_t)n_ffree, (uintmax_t)n_bfree,
531 n_ffree * 100.0 / sblock.fs_dsize);
532 if (debug) {
533 if (files < 0)
534 printf("%jd inodes missing\n", -files);
535 if (blks < 0)
536 printf("%jd blocks missing\n", -blks);
537 if (duplist != NULL) {
538 printf("The following duplicate blocks remain:");
539 for (dp = duplist; dp; dp = dp->next)
540 printf(" %jd,", (intmax_t)dp->dup);
541 printf("\n");
542 }
543 }
544 duplist = (struct dups *)0;
545 muldup = (struct dups *)0;
546 inocleanup();
547 if (fsmodified) {
548 sblock.fs_time = time(NULL);
549 sbdirty();
550 }
551 if (cvtlevel && (sblk.b_flags & B_DIRTY) != 0) {
552 /*
553 * Write out the duplicate super blocks
554 */
555 if (sbput(fswritefd, &sblock, sblock.fs_ncg) == 0)
556 fsmodified = 1;
557 }
558 if (rerun)
559 resolved = 0;
560
561 /*
562 * Check to see if the file system is mounted read-write.
563 */
564 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0)
565 resolved = 0;
566 ckfini(resolved);
567
568 if (fsmodified && !preen)
569 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
570 if (rerun) {
571 if (wantrestart && (restarts++ < 10) &&
572 (preen || reply("RESTART")))
573 return (ERESTART);
574 printf("\n***** PLEASE RERUN FSCK *****\n");
575 }
576 if (chkdoreload(mntp, pwarn) != 0) {
577 if (!fsmodified)
578 return (0);
579 if (!preen)
580 printf("\n***** REBOOT NOW *****\n");
581 sync();
582 return (4);
583 }
584 return (rerun ? ERERUN : 0);
585 }
586
587 /*
588 * If we are to do a background check:
589 * Get the mount point information of the file system
590 * If already clean, return -1
591 * Check that kernel supports background fsck
592 * Find or create the snapshot directory
593 * Create the snapshot file
594 * Open snapshot
595 * If anything fails print reason and return 0 which exits
596 */
597 static int
setup_bkgrdchk(struct statfs * mntp,int sbreadfailed,char ** filesys)598 setup_bkgrdchk(struct statfs *mntp, int sbreadfailed, char **filesys)
599 {
600 struct stat snapdir;
601 struct group *grp;
602 struct iovec *iov;
603 char errmsg[255];
604 int iovlen;
605 size_t size;
606
607 /* Get the mount point information of the file system */
608 if (mntp == NULL) {
609 pwarn("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n");
610 return (0);
611 }
612 if ((mntp->f_flags & MNT_RDONLY) != 0) {
613 pwarn("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n");
614 return (0);
615 }
616 if ((mntp->f_flags & MNT_SOFTDEP) == 0) {
617 pwarn("NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n");
618 return (0);
619 }
620 if (sbreadfailed) {
621 pwarn("SUPERBLOCK READ FAILED, CANNOT RUN IN BACKGROUND\n");
622 return (0);
623 }
624 if ((sblock.fs_flags & FS_NEEDSFSCK) != 0) {
625 pwarn("FULL FSCK NEEDED, CANNOT RUN IN BACKGROUND\n");
626 return (0);
627 }
628 if (skipclean && ckclean &&
629 (sblock.fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK)) == 0) {
630 /*
631 * file system is clean;
632 * skip snapshot and report it clean
633 */
634 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
635 return (-1);
636 }
637 /* Check that kernel supports background fsck */
638 size = MIBSIZE;
639 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0||
640 sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0||
641 sysctlnametomib("vfs.ffs.setsize", setsize, &size) < 0 ||
642 sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0||
643 sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 ||
644 sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) {
645 pwarn("KERNEL LACKS BACKGROUND FSCK SUPPORT\n");
646 return (0);
647 }
648 /*
649 * When kernel lacks runtime bgfsck superblock summary
650 * adjustment functionality, it does not mean we can not
651 * continue, as old kernels will recompute the summary at
652 * mount time. However, it will be an unexpected softupdates
653 * inconsistency if it turns out that the summary is still
654 * incorrect. Set a flag so subsequent operation can know this.
655 */
656 bkgrdsumadj = 1;
657 if (sysctlnametomib("vfs.ffs.adjndir", adjndir, &size) < 0 ||
658 sysctlnametomib("vfs.ffs.adjnbfree", adjnbfree, &size) < 0 ||
659 sysctlnametomib("vfs.ffs.adjnifree", adjnifree, &size) < 0 ||
660 sysctlnametomib("vfs.ffs.adjnffree", adjnffree, &size) < 0 ||
661 sysctlnametomib("vfs.ffs.adjnumclusters", adjnumclusters,
662 &size) < 0) {
663 bkgrdsumadj = 0;
664 pwarn("KERNEL LACKS RUNTIME SUPERBLOCK SUMMARY ADJUSTMENT "
665 "SUPPORT\n");
666 }
667 /* Find or create the snapshot directory */
668 snprintf(snapname, sizeof snapname, "%s/.snap", mntp->f_mntonname);
669 if (stat(snapname, &snapdir) < 0) {
670 if (errno != ENOENT) {
671 pwarn("CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT "
672 "RUN IN BACKGROUND\n", snapname, strerror(errno));
673 return (0);
674 }
675 if ((grp = getgrnam("operator")) == NULL ||
676 mkdir(snapname, 0770) < 0 ||
677 chown(snapname, -1, grp->gr_gid) < 0 ||
678 chmod(snapname, 0770) < 0) {
679 pwarn("CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, "
680 "CANNOT RUN IN BACKGROUND\n", snapname,
681 strerror(errno));
682 return (0);
683 }
684 } else if (!S_ISDIR(snapdir.st_mode)) {
685 pwarn("%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n",
686 snapname);
687 return (0);
688 }
689 /* Create the snapshot file */
690 iov = NULL;
691 iovlen = 0;
692 errmsg[0] = '\0';
693 snprintf(snapname, sizeof snapname, "%s/.snap/fsck_snapshot",
694 mntp->f_mntonname);
695 build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
696 build_iovec(&iov, &iovlen, "from", snapname, (size_t)-1);
697 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname, (size_t)-1);
698 build_iovec(&iov, &iovlen, "errmsg", errmsg, sizeof(errmsg));
699 build_iovec(&iov, &iovlen, "update", NULL, 0);
700 build_iovec(&iov, &iovlen, "snapshot", NULL, 0);
701 /* Create snapshot, removing old snapshot if it exists */
702 while (nmount(iov, iovlen, mntp->f_flags) < 0) {
703 if (errno == EEXIST && unlink(snapname) == 0)
704 continue;
705 pwarn("CANNOT CREATE SNAPSHOT %s: %s %s\n", snapname,
706 strerror(errno), errmsg);
707 return (0);
708 }
709 /* Open snapshot */
710 if (openfilesys(snapname) == 0) {
711 unlink(snapname);
712 pwarn("CANNOT OPEN SNAPSHOT %s: %s, CANNOT RUN IN "
713 "BACKGROUND\n", snapname, strerror(errno));
714 return (0);
715 }
716 /* Immediately unlink snapshot so that it will be deleted when closed */
717 unlink(snapname);
718 free(sblock.fs_csp);
719 free(sblock.fs_si);
720 havesb = 0;
721 *filesys = snapname;
722 cmd.version = FFS_CMD_VERSION;
723 cmd.handle = fsreadfd;
724 return (1);
725 }
726
727 static void
usage(void)728 usage(void)
729 {
730 (void) fprintf(stderr,
731 "usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n",
732 getprogname());
733 exit(1);
734 }
735
736 void
infohandler(int sig __unused)737 infohandler(int sig __unused)
738 {
739 got_siginfo = 1;
740 }
741
742 void
alarmhandler(int sig __unused)743 alarmhandler(int sig __unused)
744 {
745 got_sigalarm = 1;
746 }
747