1/*
2 * Copyright (c) 1980, 1986, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if 0
31#ifndef lint
32static const char copyright[] =
33"@(#) Copyright (c) 1980, 1986, 1993\n\
34	The Regents of the University of California.  All rights reserved.\n";
35#endif /* not lint */
36
37#ifndef lint
38static char sccsid[] = "@(#)main.c	8.6 (Berkeley) 5/14/95";
39#endif /* not lint */
40#endif
41#include <sys/cdefs.h>
42__FBSDID("$FreeBSD: stable/10/sbin/fsck_ffs/main.c 324675 2017-10-16 21:55:31Z mckusick $");
43
44#include <sys/param.h>
45#include <sys/file.h>
46#include <sys/mount.h>
47#include <sys/resource.h>
48#include <sys/stat.h>
49#include <sys/sysctl.h>
50#include <sys/uio.h>
51#include <sys/disklabel.h>
52
53#include <ufs/ufs/dinode.h>
54#include <ufs/ffs/fs.h>
55
56#include <err.h>
57#include <errno.h>
58#include <fstab.h>
59#include <grp.h>
60#include <inttypes.h>
61#include <mntopts.h>
62#include <paths.h>
63#include <stdint.h>
64#include <string.h>
65#include <time.h>
66
67#include "fsck.h"
68
69int	restarts;
70
71static void usage(void) __dead2;
72static intmax_t argtoimax(int flag, const char *req, const char *str, int base);
73static int checkfilesys(char *filesys);
74static int chkdoreload(struct statfs *mntp);
75static struct statfs *getmntpt(const char *);
76
77int
78main(int argc, char *argv[])
79{
80	int ch;
81	struct rlimit rlimit;
82	struct itimerval itimerval;
83	int ret = 0;
84
85	sync();
86	skipclean = 1;
87	inoopt = 0;
88	while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npRrSyZ")) != -1) {
89		switch (ch) {
90		case 'b':
91			skipclean = 0;
92			bflag = argtoimax('b', "number", optarg, 10);
93			printf("Alternate super block location: %jd\n", bflag);
94			break;
95
96		case 'B':
97			bkgrdflag = 1;
98			break;
99
100		case 'c':
101			skipclean = 0;
102			cvtlevel = argtoimax('c', "conversion level", optarg,
103			    10);
104			if (cvtlevel < 3)
105				errx(EEXIT, "cannot do level %d conversion",
106				    cvtlevel);
107			break;
108
109		case 'd':
110			debug++;
111			break;
112
113		case 'E':
114			Eflag++;
115			break;
116
117		case 'f':
118			skipclean = 0;
119			break;
120
121		case 'F':
122			bkgrdcheck = 1;
123			break;
124
125		case 'm':
126			lfmode = argtoimax('m', "mode", optarg, 8);
127			if (lfmode &~ 07777)
128				errx(EEXIT, "bad mode to -m: %o", lfmode);
129			printf("** lost+found creation mode %o\n", lfmode);
130			break;
131
132		case 'n':
133			nflag++;
134			yflag = 0;
135			break;
136
137		case 'p':
138			preen++;
139			/*FALLTHROUGH*/
140
141		case 'C':
142			ckclean++;
143			break;
144
145		case 'R':
146			wantrestart = 1;
147			break;
148		case 'r':
149			inoopt++;
150			break;
151
152		case 'S':
153			surrender = 1;
154			break;
155
156		case 'y':
157			yflag++;
158			nflag = 0;
159			break;
160
161		case 'Z':
162			Zflag++;
163			break;
164
165		default:
166			usage();
167		}
168	}
169	argc -= optind;
170	argv += optind;
171
172	if (!argc)
173		usage();
174
175	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
176		(void)signal(SIGINT, catch);
177	if (ckclean)
178		(void)signal(SIGQUIT, catchquit);
179	signal(SIGINFO, infohandler);
180	if (bkgrdflag) {
181		signal(SIGALRM, alarmhandler);
182		itimerval.it_interval.tv_sec = 5;
183		itimerval.it_interval.tv_usec = 0;
184		itimerval.it_value.tv_sec = 5;
185		itimerval.it_value.tv_usec = 0;
186		setitimer(ITIMER_REAL, &itimerval, NULL);
187	}
188	/*
189	 * Push up our allowed memory limit so we can cope
190	 * with huge file systems.
191	 */
192	if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
193		rlimit.rlim_cur = rlimit.rlim_max;
194		(void)setrlimit(RLIMIT_DATA, &rlimit);
195	}
196	while (argc > 0) {
197		if (checkfilesys(*argv) == ERESTART)
198			continue;
199		argc--;
200		argv++;
201	}
202
203	if (returntosingle)
204		ret = 2;
205	exit(ret);
206}
207
208static intmax_t
209argtoimax(int flag, const char *req, const char *str, int base)
210{
211	char *cp;
212	intmax_t ret;
213
214	ret = strtoimax(str, &cp, base);
215	if (cp == str || *cp)
216		errx(EEXIT, "-%c flag requires a %s", flag, req);
217	return (ret);
218}
219
220/*
221 * Check the specified file system.
222 */
223/* ARGSUSED */
224static int
225checkfilesys(char *filesys)
226{
227	ufs2_daddr_t n_ffree, n_bfree;
228	struct dups *dp;
229	struct statfs *mntp;
230	struct stat snapdir;
231	struct group *grp;
232	struct iovec *iov;
233	char errmsg[255];
234	int ofsmodified;
235	int iovlen;
236	int cylno;
237	intmax_t blks, files;
238	size_t size;
239
240	iov = NULL;
241	iovlen = 0;
242	errmsg[0] = '\0';
243	fsutilinit();
244	fsckinit();
245
246	cdevname = filesys;
247	if (debug && ckclean)
248		pwarn("starting\n");
249	/*
250	 * Make best effort to get the disk name. Check first to see
251	 * if it is listed among the mounted file systems. Failing that
252	 * check to see if it is listed in /etc/fstab.
253	 */
254	mntp = getmntpt(filesys);
255	if (mntp != NULL)
256		filesys = mntp->f_mntfromname;
257	else
258		filesys = blockcheck(filesys);
259	/*
260	 * If -F flag specified, check to see whether a background check
261	 * is possible and needed. If possible and needed, exit with
262	 * status zero. Otherwise exit with status non-zero. A non-zero
263	 * exit status will cause a foreground check to be run.
264	 */
265	sblock_init();
266	if (bkgrdcheck) {
267		if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
268			exit(3);	/* Cannot read superblock */
269		close(fsreadfd);
270		/* Earlier background failed or journaled */
271		if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ))
272			exit(4);
273		if ((sblock.fs_flags & FS_DOSOFTDEP) == 0)
274			exit(5);	/* Not running soft updates */
275		size = MIBSIZE;
276		if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0)
277			exit(6);	/* Lacks kernel support */
278		if ((mntp == NULL && sblock.fs_clean == 1) ||
279		    (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0))
280			exit(7);	/* Filesystem clean, report it now */
281		exit(0);
282	}
283	if (ckclean && skipclean) {
284		/*
285		 * If file system is gjournaled, check it here.
286		 */
287		if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
288			exit(3);	/* Cannot read superblock */
289		close(fsreadfd);
290		if ((sblock.fs_flags & FS_GJOURNAL) != 0) {
291			//printf("GJournaled file system detected on %s.\n",
292			//    filesys);
293			if (sblock.fs_clean == 1) {
294				pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
295				exit(0);
296			}
297			if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) {
298				gjournal_check(filesys);
299				if (chkdoreload(mntp) == 0)
300					exit(0);
301				exit(4);
302			} else {
303				pfatal(
304			    "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n");
305			}
306		}
307	}
308	/*
309	 * If we are to do a background check:
310	 *	Get the mount point information of the file system
311	 *	create snapshot file
312	 *	return created snapshot file
313	 *	if not found, clear bkgrdflag and proceed with normal fsck
314	 */
315	if (bkgrdflag) {
316		if (mntp == NULL) {
317			bkgrdflag = 0;
318			pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n");
319		} else if ((mntp->f_flags & MNT_SOFTDEP) == 0) {
320			bkgrdflag = 0;
321			pfatal(
322			  "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n");
323		} else if ((mntp->f_flags & MNT_RDONLY) != 0) {
324			bkgrdflag = 0;
325			pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n");
326		} else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) {
327			if (readsb(0) != 0) {
328				if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) {
329					bkgrdflag = 0;
330					pfatal(
331			"UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n");
332				}
333				if ((sblock.fs_flags & FS_UNCLEAN) == 0 &&
334				    skipclean && ckclean) {
335					/*
336					 * file system is clean;
337					 * skip snapshot and report it clean
338					 */
339					pwarn(
340					"FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
341					goto clean;
342				}
343			}
344			close(fsreadfd);
345		}
346		if (bkgrdflag) {
347			snprintf(snapname, sizeof snapname, "%s/.snap",
348			    mntp->f_mntonname);
349			if (stat(snapname, &snapdir) < 0) {
350				if (errno != ENOENT) {
351					bkgrdflag = 0;
352					pfatal(
353	"CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n",
354					    snapname, strerror(errno));
355				} else if ((grp = getgrnam("operator")) == 0 ||
356				    mkdir(snapname, 0770) < 0 ||
357				    chown(snapname, -1, grp->gr_gid) < 0 ||
358				    chmod(snapname, 0770) < 0) {
359					bkgrdflag = 0;
360					pfatal(
361	"CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n",
362					    snapname, strerror(errno));
363				}
364			} else if (!S_ISDIR(snapdir.st_mode)) {
365				bkgrdflag = 0;
366				pfatal(
367			"%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n",
368				    snapname);
369			}
370		}
371		if (bkgrdflag) {
372			snprintf(snapname, sizeof snapname,
373			    "%s/.snap/fsck_snapshot", mntp->f_mntonname);
374			build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
375			build_iovec(&iov, &iovlen, "from", snapname,
376			    (size_t)-1);
377			build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
378			    (size_t)-1);
379			build_iovec(&iov, &iovlen, "errmsg", errmsg,
380			    sizeof(errmsg));
381			build_iovec(&iov, &iovlen, "update", NULL, 0);
382			build_iovec(&iov, &iovlen, "snapshot", NULL, 0);
383
384			while (nmount(iov, iovlen, mntp->f_flags) < 0) {
385				if (errno == EEXIST && unlink(snapname) == 0)
386					continue;
387				bkgrdflag = 0;
388				pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n",
389				    snapname, strerror(errno), errmsg);
390				break;
391			}
392			if (bkgrdflag != 0)
393				filesys = snapname;
394		}
395	}
396
397	switch (setup(filesys)) {
398	case 0:
399		if (preen)
400			pfatal("CAN'T CHECK FILE SYSTEM.");
401		return (0);
402	case -1:
403	clean:
404		pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree +
405		    sblock.fs_frag * sblock.fs_cstotal.cs_nbfree));
406		printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n",
407		    (intmax_t)sblock.fs_cstotal.cs_nffree,
408		    (intmax_t)sblock.fs_cstotal.cs_nbfree,
409		    sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
410		return (0);
411	}
412	/*
413	 * Determine if we can and should do journal recovery.
414	 */
415	if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) {
416		if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) {
417			if (preen || reply("USE JOURNAL")) {
418				if (suj_check(filesys) == 0) {
419					printf("\n***** FILE SYSTEM MARKED CLEAN *****\n");
420					if (chkdoreload(mntp) == 0)
421						exit(0);
422					exit(4);
423				}
424			}
425			printf("** Skipping journal, falling through to full fsck\n\n");
426		}
427		/*
428		 * Write the superblock so we don't try to recover the
429		 * journal on another pass. If this is the only change
430		 * to the filesystem, we do not want it to be called
431		 * out as modified.
432		 */
433		sblock.fs_mtime = time(NULL);
434		sbdirty();
435		ofsmodified = fsmodified;
436		flush(fswritefd, &sblk);
437		fsmodified = ofsmodified;
438	}
439
440	/*
441	 * Cleared if any questions answered no. Used to decide if
442	 * the superblock should be marked clean.
443	 */
444	resolved = 1;
445	/*
446	 * 1: scan inodes tallying blocks used
447	 */
448	if (preen == 0) {
449		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
450		if (mntp != NULL && mntp->f_flags & MNT_ROOTFS)
451			printf("** Root file system\n");
452		printf("** Phase 1 - Check Blocks and Sizes\n");
453	}
454	clock_gettime(CLOCK_REALTIME_PRECISE, &startprog);
455	pass1();
456	IOstats("Pass1");
457
458	/*
459	 * 1b: locate first references to duplicates, if any
460	 */
461	if (duplist) {
462		if (preen || usedsoftdep)
463			pfatal("INTERNAL ERROR: dups with %s%s%s",
464			    preen ? "-p" : "",
465			    (preen && usedsoftdep) ? " and " : "",
466			    usedsoftdep ? "softupdates" : "");
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)
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)
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)
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)
500		printf("** Phase 5 - Check Cyl groups\n");
501	pass5();
502	IOstats("Pass5");
503
504	/*
505	 * print out summary statistics
506	 */
507	n_ffree = sblock.fs_cstotal.cs_nffree;
508	n_bfree = sblock.fs_cstotal.cs_nbfree;
509	files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files;
510	blks = n_blks +
511	    sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
512	blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
513	blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
514	blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks;
515	if (bkgrdflag && (files > 0 || blks > 0)) {
516		countdirs = sblock.fs_cstotal.cs_ndir - countdirs;
517		pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n",
518		    countdirs, files - countdirs, blks);
519	}
520	pwarn("%ld files, %jd used, %ju free ",
521	    (long)n_files, (intmax_t)n_blks,
522	    (uintmax_t)n_ffree + sblock.fs_frag * n_bfree);
523	printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n",
524	    (uintmax_t)n_ffree, (uintmax_t)n_bfree,
525	    n_ffree * 100.0 / sblock.fs_dsize);
526	if (debug) {
527		if (files < 0)
528			printf("%jd inodes missing\n", -files);
529		if (blks < 0)
530			printf("%jd blocks missing\n", -blks);
531		if (duplist != NULL) {
532			printf("The following duplicate blocks remain:");
533			for (dp = duplist; dp; dp = dp->next)
534				printf(" %jd,", (intmax_t)dp->dup);
535			printf("\n");
536		}
537	}
538	duplist = (struct dups *)0;
539	muldup = (struct dups *)0;
540	inocleanup();
541	if (fsmodified) {
542		sblock.fs_time = time(NULL);
543		sbdirty();
544	}
545	if (cvtlevel && sblk.b_dirty) {
546		/*
547		 * Write out the duplicate super blocks
548		 */
549		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
550			blwrite(fswritefd, (char *)&sblock,
551			    fsbtodb(&sblock, cgsblock(&sblock, cylno)),
552			    SBLOCKSIZE);
553	}
554	if (rerun)
555		resolved = 0;
556	finalIOstats();
557
558	/*
559	 * Check to see if the file system is mounted read-write.
560	 */
561	if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0)
562		resolved = 0;
563	ckfini(resolved);
564
565	for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
566		if (inostathead[cylno].il_stat != NULL)
567			free((char *)inostathead[cylno].il_stat);
568	free((char *)inostathead);
569	inostathead = NULL;
570	if (fsmodified && !preen)
571		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
572	if (rerun) {
573		if (wantrestart && (restarts++ < 10) &&
574		    (preen || reply("RESTART")))
575			return (ERESTART);
576		printf("\n***** PLEASE RERUN FSCK *****\n");
577	}
578	if (chkdoreload(mntp) != 0) {
579		if (!fsmodified)
580			return (0);
581		if (!preen)
582			printf("\n***** REBOOT NOW *****\n");
583		sync();
584		return (4);
585	}
586	return (0);
587}
588
589static int
590chkdoreload(struct statfs *mntp)
591{
592	struct iovec *iov;
593	int iovlen;
594	char errmsg[255];
595
596	if (mntp == NULL)
597		return (0);
598
599	iov = NULL;
600	iovlen = 0;
601	errmsg[0] = '\0';
602	/*
603	 * We modified a mounted file system.  Do a mount update on
604	 * it unless it is read-write, so we can continue using it
605	 * as safely as possible.
606	 */
607	if (mntp->f_flags & MNT_RDONLY) {
608		build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
609		build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname,
610		    (size_t)-1);
611		build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
612		    (size_t)-1);
613		build_iovec(&iov, &iovlen, "errmsg", errmsg,
614		    sizeof(errmsg));
615		build_iovec(&iov, &iovlen, "update", NULL, 0);
616		build_iovec(&iov, &iovlen, "reload", NULL, 0);
617		/*
618		 * XX: We need the following line until we clean up
619		 * nmount parsing of root mounts and NFS root mounts.
620		 */
621		build_iovec(&iov, &iovlen, "ro", NULL, 0);
622		if (nmount(iov, iovlen, mntp->f_flags) == 0) {
623			return (0);
624		}
625		pwarn("mount reload of '%s' failed: %s %s\n\n",
626		    mntp->f_mntonname, strerror(errno), errmsg);
627		return (1);
628	}
629	return (0);
630}
631
632/*
633 * Get the mount point information for name.
634 */
635static struct statfs *
636getmntpt(const char *name)
637{
638	struct stat devstat, mntdevstat;
639	char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
640	char *ddevname;
641	struct statfs *mntbuf, *statfsp;
642	int i, mntsize, isdev;
643
644	if (stat(name, &devstat) != 0)
645		return (NULL);
646	if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
647		isdev = 1;
648	else
649		isdev = 0;
650	mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
651	for (i = 0; i < mntsize; i++) {
652		statfsp = &mntbuf[i];
653		ddevname = statfsp->f_mntfromname;
654		if (*ddevname != '/') {
655			if (strlen(_PATH_DEV) + strlen(ddevname) + 1 >
656			    sizeof(statfsp->f_mntfromname))
657				continue;
658			strcpy(device, _PATH_DEV);
659			strcat(device, ddevname);
660			strcpy(statfsp->f_mntfromname, device);
661		}
662		if (isdev == 0) {
663			if (strcmp(name, statfsp->f_mntonname))
664				continue;
665			return (statfsp);
666		}
667		if (stat(ddevname, &mntdevstat) == 0 &&
668		    mntdevstat.st_rdev == devstat.st_rdev)
669			return (statfsp);
670	}
671	statfsp = NULL;
672	return (statfsp);
673}
674
675static void
676usage(void)
677{
678	(void) fprintf(stderr,
679"usage: %s [-BEFfnpry] [-b block] [-c level] [-m mode] filesystem ...\n",
680	    getprogname());
681	exit(1);
682}
683
684void
685infohandler(int sig __unused)
686{
687	got_siginfo = 1;
688}
689
690void
691alarmhandler(int sig __unused)
692{
693	got_sigalarm = 1;
694}
695