savecore.c revision 244218 
1/*-
2 * Copyright (c) 2002 Poul-Henning Kamp
3 * Copyright (c) 2002 Networks Associates Technology, Inc.
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
7 * and NAI Labs, the Security Research Division of Network Associates, Inc.
8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
9 * DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. The names of the authors may not be used to endorse or promote
20 *    products derived from this software without specific prior written
21 *    permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * Copyright (c) 1986, 1992, 1993
36 *	The Regents of the University of California.  All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 *    notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 *    notice, this list of conditions and the following disclaimer in the
45 *    documentation and/or other materials provided with the distribution.
46 * 4. Neither the name of the University nor the names of its contributors
47 *    may be used to endorse or promote products derived from this software
48 *    without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
60 * SUCH DAMAGE.
61 */
62
63#include <sys/cdefs.h>
64__FBSDID("$FreeBSD: head/sbin/savecore/savecore.c 244218 2012-12-14 15:12:08Z pjd $");
65
66#include <sys/param.h>
67#include <sys/disk.h>
68#include <sys/kerneldump.h>
69#include <sys/mount.h>
70#include <sys/stat.h>
71#include <errno.h>
72#include <fcntl.h>
73#include <fstab.h>
74#include <paths.h>
75#include <signal.h>
76#include <stdarg.h>
77#include <stdio.h>
78#include <stdlib.h>
79#include <string.h>
80#include <syslog.h>
81#include <time.h>
82#include <unistd.h>
83
84/* The size of the buffer used for I/O. */
85#define	BUFFERSIZE	(1024*1024)
86
87#define	STATUS_BAD	0
88#define	STATUS_GOOD	1
89#define	STATUS_UNKNOWN	2
90
91static int checkfor, compress, clear, force, keep, verbose;	/* flags */
92static int nfound, nsaved, nerr;			/* statistics */
93
94extern FILE *zopen(const char *, const char *);
95
96static sig_atomic_t got_siginfo;
97static void infohandler(int);
98
99static void
100printheader(FILE *f, const struct kerneldumpheader *h, const char *device,
101    int bounds, const int status)
102{
103	uint64_t dumplen;
104	time_t t;
105	const char *stat_str;
106
107	fprintf(f, "Dump header from device %s\n", device);
108	fprintf(f, "  Architecture: %s\n", h->architecture);
109	fprintf(f, "  Architecture Version: %u\n",
110	    dtoh32(h->architectureversion));
111	dumplen = dtoh64(h->dumplength);
112	fprintf(f, "  Dump Length: %lldB (%lld MB)\n", (long long)dumplen,
113	    (long long)(dumplen >> 20));
114	fprintf(f, "  Blocksize: %d\n", dtoh32(h->blocksize));
115	t = dtoh64(h->dumptime);
116	fprintf(f, "  Dumptime: %s", ctime(&t));
117	fprintf(f, "  Hostname: %s\n", h->hostname);
118	fprintf(f, "  Magic: %s\n", h->magic);
119	fprintf(f, "  Version String: %s", h->versionstring);
120	fprintf(f, "  Panic String: %s\n", h->panicstring);
121	fprintf(f, "  Dump Parity: %u\n", h->parity);
122	fprintf(f, "  Bounds: %d\n", bounds);
123
124	switch(status) {
125	case STATUS_BAD:
126		stat_str = "bad";
127		break;
128	case STATUS_GOOD:
129		stat_str = "good";
130		break;
131	default:
132		stat_str = "unknown";
133	}
134	fprintf(f, "  Dump Status: %s\n", stat_str);
135	fflush(f);
136}
137
138static int
139getbounds(void) {
140	FILE *fp;
141	char buf[6];
142	int ret;
143
144	ret = 0;
145
146	if ((fp = fopen("bounds", "r")) == NULL) {
147		if (verbose)
148			printf("unable to open bounds file, using 0\n");
149		return (ret);
150	}
151
152	if (fgets(buf, sizeof buf, fp) == NULL) {
153		syslog(LOG_WARNING, "unable to read from bounds, using 0");
154		fclose(fp);
155		return (ret);
156	}
157
158	errno = 0;
159	ret = (int)strtol(buf, NULL, 10);
160	if (ret == 0 && (errno == EINVAL || errno == ERANGE))
161		syslog(LOG_WARNING, "invalid value found in bounds, using 0");
162	return (ret);
163}
164
165static void
166writebounds(int bounds) {
167	FILE *fp;
168
169	if ((fp = fopen("bounds", "w")) == NULL) {
170		syslog(LOG_WARNING, "unable to write to bounds file: %m");
171		return;
172	}
173
174	if (verbose)
175		printf("bounds number: %d\n", bounds);
176
177	fprintf(fp, "%d\n", bounds);
178	fclose(fp);
179}
180
181/*
182 * Check that sufficient space is available on the disk that holds the
183 * save directory.
184 */
185static int
186check_space(const char *savedir, off_t dumpsize)
187{
188	FILE *fp;
189	off_t minfree, spacefree, totfree, needed;
190	struct statfs fsbuf;
191	char buf[100], path[MAXPATHLEN];
192
193	if (statfs(savedir, &fsbuf) < 0) {
194		syslog(LOG_ERR, "%s: %m", savedir);
195		exit(1);
196	}
197	spacefree = ((off_t) fsbuf.f_bavail * fsbuf.f_bsize) / 1024;
198	totfree = ((off_t) fsbuf.f_bfree * fsbuf.f_bsize) / 1024;
199
200	(void)snprintf(path, sizeof(path), "%s/minfree", savedir);
201	if ((fp = fopen(path, "r")) == NULL)
202		minfree = 0;
203	else {
204		if (fgets(buf, sizeof(buf), fp) == NULL)
205			minfree = 0;
206		else
207			minfree = atoi(buf);
208		(void)fclose(fp);
209	}
210
211	needed = dumpsize / 1024 + 2;	/* 2 for info file */
212	if (((minfree > 0) ? spacefree : totfree) - needed < minfree) {
213		syslog(LOG_WARNING,
214	"no dump, not enough free space on device (%lld available, need %lld)",
215		    (long long)(minfree > 0 ? spacefree : totfree),
216		    (long long)needed);
217		return (0);
218	}
219	if (spacefree - needed < 0)
220		syslog(LOG_WARNING,
221		    "dump performed, but free space threshold crossed");
222	return (1);
223}
224
225#define BLOCKSIZE (1<<12)
226#define BLOCKMASK (~(BLOCKSIZE-1))
227
228static int
229DoRegularFile(int fd, off_t dumpsize, char *buf, const char *device,
230    const char *filename, FILE *fp)
231{
232	int he, hs, nr, nw, wl;
233	off_t dmpcnt, origsize;
234
235	dmpcnt = 0;
236	origsize = dumpsize;
237	he = 0;
238	while (dumpsize > 0) {
239		wl = BUFFERSIZE;
240		if (wl > dumpsize)
241			wl = dumpsize;
242		nr = read(fd, buf, wl);
243		if (nr != wl) {
244			if (nr == 0)
245				syslog(LOG_WARNING,
246				    "WARNING: EOF on dump device");
247			else
248				syslog(LOG_ERR, "read error on %s: %m", device);
249			nerr++;
250			return (-1);
251		}
252		if (compress) {
253			nw = fwrite(buf, 1, wl, fp);
254		} else {
255			for (nw = 0; nw < nr; nw = he) {
256				/* find a contiguous block of zeroes */
257				for (hs = nw; hs < nr; hs += BLOCKSIZE) {
258					for (he = hs; he < nr && buf[he] == 0;
259					    ++he)
260						/* nothing */ ;
261					/* is the hole long enough to matter? */
262					if (he >= hs + BLOCKSIZE)
263						break;
264				}
265
266				/* back down to a block boundary */
267				he &= BLOCKMASK;
268
269				/*
270				 * 1) Don't go beyond the end of the buffer.
271				 * 2) If the end of the buffer is less than
272				 *    BLOCKSIZE bytes away, we're at the end
273				 *    of the file, so just grab what's left.
274				 */
275				if (hs + BLOCKSIZE > nr)
276					hs = he = nr;
277
278				/*
279				 * At this point, we have a partial ordering:
280				 *     nw <= hs <= he <= nr
281				 * If hs > nw, buf[nw..hs] contains non-zero data.
282				 * If he > hs, buf[hs..he] is all zeroes.
283				 */
284				if (hs > nw)
285					if (fwrite(buf + nw, hs - nw, 1, fp)
286					    != 1)
287					break;
288				if (he > hs)
289					if (fseeko(fp, he - hs, SEEK_CUR) == -1)
290						break;
291			}
292		}
293		if (nw != wl) {
294			syslog(LOG_ERR,
295			    "write error on %s file: %m", filename);
296			syslog(LOG_WARNING,
297			    "WARNING: vmcore may be incomplete");
298			nerr++;
299			return (-1);
300		}
301		if (verbose) {
302			dmpcnt += wl;
303			printf("%llu\r", (unsigned long long)dmpcnt);
304			fflush(stdout);
305		}
306		dumpsize -= wl;
307		if (got_siginfo) {
308			printf("%s %.1lf%%\n", filename, (100.0 - (100.0 *
309			    (double)dumpsize / (double)origsize)));
310			got_siginfo = 0;
311		}
312	}
313	return (0);
314}
315
316/*
317 * Specialized version of dump-reading logic for use with textdumps, which
318 * are written backwards from the end of the partition, and must be reversed
319 * before being written to the file.  Textdumps are small, so do a bit less
320 * work to optimize/sparsify.
321 */
322static int
323DoTextdumpFile(int fd, off_t dumpsize, off_t lasthd, char *buf,
324    const char *device, const char *filename, FILE *fp)
325{
326	int nr, nw, wl;
327	off_t dmpcnt, totsize;
328
329	totsize = dumpsize;
330	dmpcnt = 0;
331	wl = 512;
332	if ((dumpsize % wl) != 0) {
333		syslog(LOG_ERR, "textdump uneven multiple of 512 on %s",
334		    device);
335		nerr++;
336		return (-1);
337	}
338	while (dumpsize > 0) {
339		nr = pread(fd, buf, wl, lasthd - (totsize - dumpsize) - wl);
340		if (nr != wl) {
341			if (nr == 0)
342				syslog(LOG_WARNING,
343				    "WARNING: EOF on dump device");
344			else
345				syslog(LOG_ERR, "read error on %s: %m", device);
346			nerr++;
347			return (-1);
348		}
349		nw = fwrite(buf, 1, wl, fp);
350		if (nw != wl) {
351			syslog(LOG_ERR,
352			    "write error on %s file: %m", filename);
353			syslog(LOG_WARNING,
354			    "WARNING: textdump may be incomplete");
355			nerr++;
356			return (-1);
357		}
358		if (verbose) {
359			dmpcnt += wl;
360			printf("%llu\r", (unsigned long long)dmpcnt);
361			fflush(stdout);
362		}
363		dumpsize -= wl;
364	}
365	return (0);
366}
367
368static void
369DoFile(const char *savedir, const char *device)
370{
371	static char filename[PATH_MAX];
372	static char *buf = NULL;
373	struct kerneldumpheader kdhf, kdhl;
374	off_t mediasize, dumpsize, firsthd, lasthd;
375	FILE *info, *fp;
376	mode_t oumask;
377	int fd, fdinfo, error;
378	int bounds, status;
379	u_int sectorsize;
380	int istextdump;
381
382	bounds = getbounds();
383	mediasize = 0;
384	status = STATUS_UNKNOWN;
385
386	if (buf == NULL) {
387		buf = malloc(BUFFERSIZE);
388		if (buf == NULL) {
389			syslog(LOG_ERR, "%m");
390			return;
391		}
392	}
393
394	if (verbose)
395		printf("checking for kernel dump on device %s\n", device);
396
397	fd = open(device, (checkfor || keep) ? O_RDONLY : O_RDWR);
398	if (fd < 0) {
399		syslog(LOG_ERR, "%s: %m", device);
400		return;
401	}
402
403	error = ioctl(fd, DIOCGMEDIASIZE, &mediasize);
404	if (!error)
405		error = ioctl(fd, DIOCGSECTORSIZE, &sectorsize);
406	if (error) {
407		syslog(LOG_ERR,
408		    "couldn't find media and/or sector size of %s: %m", device);
409		goto closefd;
410	}
411
412	if (verbose) {
413		printf("mediasize = %lld\n", (long long)mediasize);
414		printf("sectorsize = %u\n", sectorsize);
415	}
416
417	lasthd = mediasize - sectorsize;
418	lseek(fd, lasthd, SEEK_SET);
419	error = read(fd, &kdhl, sizeof kdhl);
420	if (error != sizeof kdhl) {
421		syslog(LOG_ERR,
422		    "error reading last dump header at offset %lld in %s: %m",
423		    (long long)lasthd, device);
424		goto closefd;
425	}
426	istextdump = 0;
427	if (strncmp(kdhl.magic, TEXTDUMPMAGIC, sizeof kdhl) == 0) {
428		if (verbose)
429			printf("textdump magic on last dump header on %s\n",
430			    device);
431		istextdump = 1;
432		if (dtoh32(kdhl.version) != KERNELDUMP_TEXT_VERSION) {
433			syslog(LOG_ERR,
434			    "unknown version (%d) in last dump header on %s",
435			    dtoh32(kdhl.version), device);
436
437			status = STATUS_BAD;
438			if (force == 0)
439				goto closefd;
440		}
441	} else if (memcmp(kdhl.magic, KERNELDUMPMAGIC, sizeof kdhl.magic) ==
442	    0) {
443		if (dtoh32(kdhl.version) != KERNELDUMPVERSION) {
444			syslog(LOG_ERR,
445			    "unknown version (%d) in last dump header on %s",
446			    dtoh32(kdhl.version), device);
447
448			status = STATUS_BAD;
449			if (force == 0)
450				goto closefd;
451		}
452	} else {
453		if (verbose)
454			printf("magic mismatch on last dump header on %s\n",
455			    device);
456
457		status = STATUS_BAD;
458		if (force == 0)
459			goto closefd;
460
461		if (memcmp(kdhl.magic, KERNELDUMPMAGIC_CLEARED,
462			    sizeof kdhl.magic) == 0) {
463			if (verbose)
464				printf("forcing magic on %s\n", device);
465			memcpy(kdhl.magic, KERNELDUMPMAGIC,
466			    sizeof kdhl.magic);
467		} else {
468			syslog(LOG_ERR, "unable to force dump - bad magic");
469			goto closefd;
470		}
471		if (dtoh32(kdhl.version) != KERNELDUMPVERSION) {
472			syslog(LOG_ERR,
473			    "unknown version (%d) in last dump header on %s",
474			    dtoh32(kdhl.version), device);
475
476			status = STATUS_BAD;
477			if (force == 0)
478				goto closefd;
479		}
480	}
481
482	nfound++;
483	if (clear)
484		goto nuke;
485
486	if (kerneldump_parity(&kdhl)) {
487		syslog(LOG_ERR,
488		    "parity error on last dump header on %s", device);
489		nerr++;
490		status = STATUS_BAD;
491		if (force == 0)
492			goto closefd;
493	}
494	dumpsize = dtoh64(kdhl.dumplength);
495	firsthd = lasthd - dumpsize - sizeof kdhf;
496	lseek(fd, firsthd, SEEK_SET);
497	error = read(fd, &kdhf, sizeof kdhf);
498	if (error != sizeof kdhf) {
499		syslog(LOG_ERR,
500		    "error reading first dump header at offset %lld in %s: %m",
501		    (long long)firsthd, device);
502		nerr++;
503		goto closefd;
504	}
505
506	if (verbose >= 2) {
507		printf("First dump headers:\n");
508		printheader(stdout, &kdhf, device, bounds, -1);
509
510		printf("\nLast dump headers:\n");
511		printheader(stdout, &kdhl, device, bounds, -1);
512		printf("\n");
513	}
514
515	if (memcmp(&kdhl, &kdhf, sizeof kdhl)) {
516		syslog(LOG_ERR,
517		    "first and last dump headers disagree on %s", device);
518		nerr++;
519		status = STATUS_BAD;
520		if (force == 0)
521			goto closefd;
522	} else {
523		status = STATUS_GOOD;
524	}
525
526	if (checkfor) {
527		printf("A dump exists on %s\n", device);
528		close(fd);
529		exit(0);
530	}
531
532	if (kdhl.panicstring[0])
533		syslog(LOG_ALERT, "reboot after panic: %s", kdhl.panicstring);
534	else
535		syslog(LOG_ALERT, "reboot");
536
537	if (verbose)
538		printf("Checking for available free space\n");
539	if (!check_space(savedir, dumpsize)) {
540		nerr++;
541		goto closefd;
542	}
543
544	writebounds(bounds + 1);
545
546	sprintf(buf, "info.%d", bounds);
547
548	/*
549	 * Create or overwrite any existing dump header files.
550	 */
551	fdinfo = open(buf, O_WRONLY | O_CREAT | O_TRUNC, 0600);
552	if (fdinfo < 0) {
553		syslog(LOG_ERR, "%s: %m", buf);
554		nerr++;
555		goto closefd;
556	}
557	oumask = umask(S_IRWXG|S_IRWXO); /* Restrict access to the core file.*/
558	if (compress) {
559		sprintf(filename, "%s.%d.gz", istextdump ? "textdump.tar" :
560		    "vmcore", bounds);
561		fp = zopen(filename, "w");
562	} else {
563		sprintf(filename, "%s.%d", istextdump ? "textdump.tar" :
564		    "vmcore", bounds);
565		fp = fopen(filename, "w");
566	}
567	if (fp == NULL) {
568		syslog(LOG_ERR, "%s: %m", filename);
569		close(fdinfo);
570		nerr++;
571		goto closefd;
572	}
573	(void)umask(oumask);
574
575	info = fdopen(fdinfo, "w");
576
577	if (info == NULL) {
578		syslog(LOG_ERR, "fdopen failed: %m");
579		nerr++;
580		goto closefd;
581	}
582
583	if (verbose)
584		printheader(stdout, &kdhl, device, bounds, status);
585
586	printheader(info, &kdhl, device, bounds, status);
587	fclose(info);
588
589	syslog(LOG_NOTICE, "writing %score to %s",
590	    compress ? "compressed " : "", filename);
591
592	if (istextdump) {
593		if (DoTextdumpFile(fd, dumpsize, lasthd, buf, device,
594		    filename, fp) < 0)
595			goto closeall;
596	} else {
597		if (DoRegularFile(fd, dumpsize, buf, device, filename, fp)
598		    < 0)
599			goto closeall;
600	}
601	if (verbose)
602		printf("\n");
603
604	if (fclose(fp) < 0) {
605		syslog(LOG_ERR, "error on %s: %m", filename);
606		nerr++;
607		goto closeall;
608	}
609	nsaved++;
610
611	if (verbose)
612		printf("dump saved\n");
613
614nuke:
615	if (!keep) {
616		if (verbose)
617			printf("clearing dump header\n");
618		memcpy(kdhl.magic, KERNELDUMPMAGIC_CLEARED, sizeof kdhl.magic);
619		lseek(fd, lasthd, SEEK_SET);
620		error = write(fd, &kdhl, sizeof kdhl);
621		if (error != sizeof kdhl)
622			syslog(LOG_ERR,
623			    "error while clearing the dump header: %m");
624	}
625	close(fd);
626	return;
627
628closeall:
629	fclose(fp);
630
631closefd:
632	close(fd);
633}
634
635static void
636usage(void)
637{
638	fprintf(stderr, "%s\n%s\n%s\n",
639	    "usage: savecore -c [-v] [device ...]",
640	    "       savecore -C [-v] [device ...]",
641	    "       savecore [-fkvz] [directory [device ...]]");
642	exit (1);
643}
644
645int
646main(int argc, char **argv)
647{
648	const char *savedir = ".";
649	struct fstab *fsp;
650	int i, ch, error;
651
652	checkfor = compress = clear = force = keep = verbose = 0;
653	nfound = nsaved = nerr = 0;
654
655	openlog("savecore", LOG_PERROR, LOG_DAEMON);
656	signal(SIGINFO, infohandler);
657
658	while ((ch = getopt(argc, argv, "Ccfkvz")) != -1)
659		switch(ch) {
660		case 'C':
661			checkfor = 1;
662			break;
663		case 'c':
664			clear = 1;
665			break;
666		case 'k':
667			keep = 1;
668			break;
669		case 'v':
670			verbose++;
671			break;
672		case 'f':
673			force = 1;
674			break;
675		case 'z':
676			compress = 1;
677			break;
678		case '?':
679		default:
680			usage();
681		}
682	if (checkfor && (clear || force || keep))
683		usage();
684	if (clear && (compress || keep))
685		usage();
686	argc -= optind;
687	argv += optind;
688	if (argc >= 1 && !checkfor && !clear) {
689		error = chdir(argv[0]);
690		if (error) {
691			syslog(LOG_ERR, "chdir(%s): %m", argv[0]);
692			exit(1);
693		}
694		savedir = argv[0];
695		argc--;
696		argv++;
697	}
698	if (argc == 0) {
699		for (;;) {
700			fsp = getfsent();
701			if (fsp == NULL)
702				break;
703			if (strcmp(fsp->fs_vfstype, "swap") &&
704			    strcmp(fsp->fs_vfstype, "dump"))
705				continue;
706			DoFile(savedir, fsp->fs_spec);
707		}
708	} else {
709		for (i = 0; i < argc; i++)
710			DoFile(savedir, argv[i]);
711	}
712
713	/* Emit minimal output. */
714	if (nfound == 0) {
715		if (checkfor) {
716			printf("No dump exists\n");
717			exit(1);
718		}
719		syslog(LOG_WARNING, "no dumps found");
720	}
721	else if (nsaved == 0) {
722		if (nerr != 0)
723			syslog(LOG_WARNING, "unsaved dumps found but not saved");
724		else
725			syslog(LOG_WARNING, "no unsaved dumps found");
726	}
727
728	return (0);
729}
730
731static void
732infohandler(int sig __unused)
733{
734	got_siginfo = 1;
735}
736