savecore.c revision 147506
11558Srgrimes/*- 293492Sphk * Copyright (c) 2002 Poul-Henning Kamp 393492Sphk * Copyright (c) 2002 Networks Associates Technology, Inc. 493492Sphk * All rights reserved. 51558Srgrimes * 693492Sphk * This software was developed for the FreeBSD Project by Poul-Henning Kamp 793492Sphk * and NAI Labs, the Security Research Division of Network Associates, Inc. 893492Sphk * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 993492Sphk * DARPA CHATS research program. 1093492Sphk * 111558Srgrimes * Redistribution and use in source and binary forms, with or without 121558Srgrimes * modification, are permitted provided that the following conditions 131558Srgrimes * are met: 141558Srgrimes * 1. Redistributions of source code must retain the above copyright 151558Srgrimes * notice, this list of conditions and the following disclaimer. 161558Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 171558Srgrimes * notice, this list of conditions and the following disclaimer in the 181558Srgrimes * documentation and/or other materials provided with the distribution. 1993492Sphk * 3. The names of the authors may not be used to endorse or promote 2093492Sphk * products derived from this software without specific prior written 2193492Sphk * permission. 221558Srgrimes * 2393492Sphk * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 241558Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 251558Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2693492Sphk * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 271558Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 281558Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 291558Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 301558Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 311558Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 321558Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 331558Srgrimes * SUCH DAMAGE. 3496049Sfenner * 3596049Sfenner * Copyright (c) 1986, 1992, 1993 3696049Sfenner * The Regents of the University of California. All rights reserved. 3796049Sfenner * 3896049Sfenner * Redistribution and use in source and binary forms, with or without 3996049Sfenner * modification, are permitted provided that the following conditions 4096049Sfenner * are met: 4196049Sfenner * 1. Redistributions of source code must retain the above copyright 4296049Sfenner * notice, this list of conditions and the following disclaimer. 4396049Sfenner * 2. Redistributions in binary form must reproduce the above copyright 4496049Sfenner * notice, this list of conditions and the following disclaimer in the 4596049Sfenner * documentation and/or other materials provided with the distribution. 4696049Sfenner * 3. All advertising materials mentioning features or use of this software 4796049Sfenner * must display the following acknowledgement: 4896049Sfenner * This product includes software developed by the University of 4996049Sfenner * California, Berkeley and its contributors. 5096049Sfenner * 4. Neither the name of the University nor the names of its contributors 5196049Sfenner * may be used to endorse or promote products derived from this software 5296049Sfenner * without specific prior written permission. 5396049Sfenner * 5496049Sfenner * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 5596049Sfenner * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 5696049Sfenner * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 5796049Sfenner * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 5896049Sfenner * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 5996049Sfenner * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 6096049Sfenner * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 6196049Sfenner * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 6296049Sfenner * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 6396049Sfenner * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 6496049Sfenner * SUCH DAMAGE. 651558Srgrimes */ 661558Srgrimes 6795183Scharnier#include <sys/cdefs.h> 6895183Scharnier__FBSDID("$FreeBSD: head/sbin/savecore/savecore.c 147506 2005-06-20 20:01:29Z dwhite $"); 6995183Scharnier 7096049Sfenner#include <sys/param.h> 7194580Smarcel#include <sys/disk.h> 7294580Smarcel#include <sys/kerneldump.h> 7396025Smux#include <sys/param.h> 7496025Smux#include <sys/mount.h> 7594580Smarcel#include <sys/stat.h> 7694580Smarcel#include <errno.h> 7793492Sphk#include <fcntl.h> 7893492Sphk#include <fstab.h> 7996025Smux#include <paths.h> 8096049Sfenner#include <stdarg.h> 8194580Smarcel#include <stdio.h> 8294580Smarcel#include <stdlib.h> 8394580Smarcel#include <string.h> 8496049Sfenner#include <syslog.h> 8593492Sphk#include <time.h> 8693492Sphk#include <unistd.h> 871558Srgrimes 8897746Smarcel/* The size of the buffer used for I/O. */ 8997746Smarcel#define BUFFERSIZE (1024*1024) 9097746Smarcel 91142533Sobrien#define STATUS_BAD 0 92142533Sobrien#define STATUS_GOOD 1 93142533Sobrien#define STATUS_UNKNOWN 2 94142359Sobrien 95133814Srustatic int checkfor, compress, clear, force, keep, verbose; /* flags */ 96133814Srustatic int nfound, nsaved, nerr; /* statistics */ 9794580Smarcel 9896049Sfennerextern FILE *zopen(const char *, const char *); 9996049Sfenner 10093492Sphkstatic void 10194580Smarcelprintheader(FILE *f, const struct kerneldumpheader *h, const char *device, 102142359Sobrien int bounds, const int status) 1031558Srgrimes{ 10493717Smarcel uint64_t dumplen; 10593492Sphk time_t t; 106142359Sobrien const char *stat_str; 1071558Srgrimes 108142359Sobrien fprintf(f, "Dump header from device %s\n", device); 10993492Sphk fprintf(f, " Architecture: %s\n", h->architecture); 110142359Sobrien fprintf(f, " Architecture Version: %u\n", h->architectureversion); 11193717Smarcel dumplen = dtoh64(h->dumplength); 112142359Sobrien fprintf(f, " Dump Length: %lldB (%lld MB)\n", (long long)dumplen, 11393717Smarcel (long long)(dumplen >> 20)); 11493717Smarcel fprintf(f, " Blocksize: %d\n", dtoh32(h->blocksize)); 11593717Smarcel t = dtoh64(h->dumptime); 11693492Sphk fprintf(f, " Dumptime: %s", ctime(&t)); 11793492Sphk fprintf(f, " Hostname: %s\n", h->hostname); 118142359Sobrien fprintf(f, " Magic: %s\n", h->magic); 119142359Sobrien fprintf(f, " Version String: %s", h->versionstring); 120142359Sobrien fprintf(f, " Panic String: %s\n", h->panicstring); 121142359Sobrien fprintf(f, " Dump Parity: %u\n", h->parity); 12296049Sfenner fprintf(f, " Bounds: %d\n", bounds); 123142359Sobrien 124142359Sobrien switch(status) { 125142359Sobrien case STATUS_BAD: 126142533Sobrien stat_str = "bad"; 127142533Sobrien break; 128142359Sobrien case STATUS_GOOD: 129142533Sobrien stat_str = "good"; 130142533Sobrien break; 131142359Sobrien default: 132142533Sobrien stat_str = "unknown"; 133142359Sobrien } 134142359Sobrien fprintf(f, " Dump Status: %s\n", stat_str); 13595039Sphk fflush(f); 1361558Srgrimes} 1371558Srgrimes 13896049Sfennerstatic int 13996049Sfennergetbounds(void) { 14096049Sfenner FILE *fp; 14196049Sfenner char buf[6]; 14296049Sfenner int ret; 14396049Sfenner 14496049Sfenner ret = 0; 14596049Sfenner 14696049Sfenner if ((fp = fopen("bounds", "r")) == NULL) { 14796049Sfenner syslog(LOG_WARNING, "unable to open bounds file, using 0"); 148147506Sdwhite return (ret); 14996049Sfenner } 15096049Sfenner 15196049Sfenner if (fgets(buf, sizeof buf, fp) == NULL) { 15296049Sfenner syslog(LOG_WARNING, "unable to read from bounds, using 0"); 15396049Sfenner fclose(fp); 154147506Sdwhite return (ret); 15596049Sfenner } 15696049Sfenner 15796049Sfenner errno = 0; 15896049Sfenner ret = (int)strtol(buf, NULL, 10); 15996049Sfenner if (ret == 0 && (errno == EINVAL || errno == ERANGE)) 16096049Sfenner syslog(LOG_WARNING, "invalid value found in bounds, using 0"); 161147506Sdwhite return (ret); 162147506Sdwhite} 16396049Sfenner 164147506Sdwhitestatic void 165147506Sdwhitewritebounds(int bounds) { 166147506Sdwhite FILE *fp; 16796049Sfenner 16896049Sfenner if ((fp = fopen("bounds", "w")) == NULL) { 16996049Sfenner syslog(LOG_WARNING, "unable to write to bounds file: %m"); 170147506Sdwhite return; 17196049Sfenner } 17296049Sfenner 17396049Sfenner if (verbose) 174147506Sdwhite printf("bounds number: %d\n", bounds); 17596049Sfenner 176147506Sdwhite fprintf(fp, "%d\n", bounds); 17796049Sfenner fclose(fp); 17896049Sfenner} 17996049Sfenner 18096025Smux/* 18196025Smux * Check that sufficient space is available on the disk that holds the 18296025Smux * save directory. 18396025Smux */ 18496025Smuxstatic int 185146763Sdelphijcheck_space(const char *savedir, off_t dumpsize) 18696025Smux{ 18796025Smux FILE *fp; 18896049Sfenner off_t minfree, spacefree, totfree, needed; 18996025Smux struct statfs fsbuf; 19096025Smux char buf[100], path[MAXPATHLEN]; 19193717Smarcel 19296049Sfenner if (statfs(savedir, &fsbuf) < 0) { 19396049Sfenner syslog(LOG_ERR, "%s: %m", savedir); 19496049Sfenner exit(1); 19596049Sfenner } 19696025Smux spacefree = ((off_t) fsbuf.f_bavail * fsbuf.f_bsize) / 1024; 19796025Smux totfree = ((off_t) fsbuf.f_bfree * fsbuf.f_bsize) / 1024; 19896025Smux 19996025Smux (void)snprintf(path, sizeof(path), "%s/minfree", savedir); 20096025Smux if ((fp = fopen(path, "r")) == NULL) 20196025Smux minfree = 0; 20296025Smux else { 20396025Smux if (fgets(buf, sizeof(buf), fp) == NULL) 20496025Smux minfree = 0; 20596025Smux else 20696025Smux minfree = atoi(buf); 20796025Smux (void)fclose(fp); 20896025Smux } 20996025Smux 21096049Sfenner needed = dumpsize / 1024 + 2; /* 2 for info file */ 21196025Smux if (((minfree > 0) ? spacefree : totfree) - needed < minfree) { 21296049Sfenner syslog(LOG_WARNING, 21396049Sfenner "no dump, not enough free space on device (%lld available, need %lld)", 21496025Smux (long long)(minfree > 0 ? spacefree : totfree), 21596025Smux (long long)needed); 21696025Smux return (0); 21796025Smux } 21896025Smux if (spacefree - needed < 0) 21996049Sfenner syslog(LOG_WARNING, 22096049Sfenner "dump performed, but free space threshold crossed"); 22196025Smux return (1); 22296025Smux} 22396025Smux 22496049Sfenner#define BLOCKSIZE (1<<12) 22596049Sfenner#define BLOCKMASK (~(BLOCKSIZE-1)) 22696025Smux 22793492Sphkstatic void 228146763SdelphijDoFile(const char *savedir, const char *device) 2291558Srgrimes{ 23097340Smarcel static char *buf = NULL; 23194580Smarcel struct kerneldumpheader kdhf, kdhl; 23296049Sfenner off_t mediasize, dumpsize, firsthd, lasthd, dmpcnt; 23396049Sfenner FILE *info, *fp; 234142533Sobrien mode_t oumask; 23596049Sfenner int fd, fdinfo, error, wl; 236139975Sdelphij int nr, nw, hs, he = 0; 237142359Sobrien int bounds, status; 23894580Smarcel u_int sectorsize; 2398871Srgrimes 240142359Sobrien bounds = getbounds(); 24196049Sfenner dmpcnt = 0; 24296049Sfenner mediasize = 0; 243142359Sobrien status = STATUS_UNKNOWN; 24496049Sfenner 24597340Smarcel if (buf == NULL) { 24697746Smarcel buf = malloc(BUFFERSIZE); 24797340Smarcel if (buf == NULL) { 24897340Smarcel syslog(LOG_ERR, "%m"); 24997340Smarcel return; 25097340Smarcel } 25197340Smarcel } 25297340Smarcel 25394580Smarcel if (verbose) 25496049Sfenner printf("checking for kernel dump on device %s\n", device); 25594580Smarcel 25694580Smarcel fd = open(device, O_RDWR); 25793492Sphk if (fd < 0) { 25896049Sfenner syslog(LOG_ERR, "%s: %m", device); 25993492Sphk return; 26047095Sluoqi } 26197340Smarcel 26293492Sphk error = ioctl(fd, DIOCGMEDIASIZE, &mediasize); 26393492Sphk if (!error) 26493492Sphk error = ioctl(fd, DIOCGSECTORSIZE, §orsize); 26593492Sphk if (error) { 26696049Sfenner syslog(LOG_ERR, 26796049Sfenner "couldn't find media and/or sector size of %s: %m", device); 26894580Smarcel goto closefd; 2691558Srgrimes } 27094580Smarcel 27194580Smarcel if (verbose) { 27296049Sfenner printf("mediasize = %lld\n", (long long)mediasize); 27396049Sfenner printf("sectorsize = %u\n", sectorsize); 27494580Smarcel } 27594580Smarcel 27693492Sphk lasthd = mediasize - sectorsize; 27793492Sphk lseek(fd, lasthd, SEEK_SET); 27893492Sphk error = read(fd, &kdhl, sizeof kdhl); 27993492Sphk if (error != sizeof kdhl) { 28096049Sfenner syslog(LOG_ERR, 28196049Sfenner "error reading last dump header at offset %lld in %s: %m", 28294580Smarcel (long long)lasthd, device); 28394580Smarcel goto closefd; 2841558Srgrimes } 28593492Sphk if (memcmp(kdhl.magic, KERNELDUMPMAGIC, sizeof kdhl.magic)) { 28694580Smarcel if (verbose) 28796049Sfenner printf("magic mismatch on last dump header on %s\n", 28894580Smarcel device); 28996049Sfenner 290142359Sobrien status = STATUS_BAD; 29196049Sfenner if (force == 0) 29296049Sfenner goto closefd; 29396049Sfenner 29496049Sfenner if (memcmp(kdhl.magic, KERNELDUMPMAGIC_CLEARED, 29596049Sfenner sizeof kdhl.magic) == 0) { 29696049Sfenner if (verbose) 29796049Sfenner printf("forcing magic on %s\n", device); 29896049Sfenner memcpy(kdhl.magic, KERNELDUMPMAGIC, 29996049Sfenner sizeof kdhl.magic); 30096049Sfenner } else { 30196049Sfenner syslog(LOG_ERR, "unable to force dump - bad magic"); 30296049Sfenner goto closefd; 30396049Sfenner } 3041558Srgrimes } 30593717Smarcel if (dtoh32(kdhl.version) != KERNELDUMPVERSION) { 30696049Sfenner syslog(LOG_ERR, 30796049Sfenner "unknown version (%d) in last dump header on %s", 30894580Smarcel dtoh32(kdhl.version), device); 309142359Sobrien 310142359Sobrien status = STATUS_BAD; 311142359Sobrien if (force == 0) 312142359Sobrien goto closefd; 31366429Sdes } 31494580Smarcel 31594580Smarcel nfound++; 31694580Smarcel if (clear) 31794580Smarcel goto nuke; 31894580Smarcel 31994580Smarcel if (kerneldump_parity(&kdhl)) { 32096049Sfenner syslog(LOG_ERR, 32196049Sfenner "parity error on last dump header on %s", device); 32296025Smux nerr++; 323142359Sobrien status = STATUS_BAD; 324142359Sobrien if (force == 0) 325142359Sobrien goto closefd; 32694580Smarcel } 32793717Smarcel dumpsize = dtoh64(kdhl.dumplength); 32893717Smarcel firsthd = lasthd - dumpsize - sizeof kdhf; 32993492Sphk lseek(fd, firsthd, SEEK_SET); 33093492Sphk error = read(fd, &kdhf, sizeof kdhf); 33193492Sphk if (error != sizeof kdhf) { 33296049Sfenner syslog(LOG_ERR, 33396049Sfenner "error reading first dump header at offset %lld in %s: %m", 33494580Smarcel (long long)firsthd, device); 33596025Smux nerr++; 33694580Smarcel goto closefd; 3371558Srgrimes } 338142359Sobrien 339142359Sobrien if (verbose >= 2) { 340142359Sobrien printf("First dump headers:\n"); 341142359Sobrien printheader(stdout, &kdhf, device, bounds, -1); 342142359Sobrien 343142359Sobrien printf("\nLast dump headers:\n"); 344142359Sobrien printheader(stdout, &kdhl, device, bounds, -1); 345142359Sobrien printf("\n"); 346142359Sobrien } 347142359Sobrien 34893492Sphk if (memcmp(&kdhl, &kdhf, sizeof kdhl)) { 34996049Sfenner syslog(LOG_ERR, 35096049Sfenner "first and last dump headers disagree on %s", device); 35196025Smux nerr++; 352142359Sobrien status = STATUS_BAD; 353142359Sobrien if (force == 0) 354142359Sobrien goto closefd; 355142359Sobrien } else { 356142359Sobrien status = STATUS_GOOD; 35766429Sdes } 35894580Smarcel 359119734Sdougb if (checkfor) { 360119734Sdougb printf("A dump exists on %s\n", device); 361119734Sdougb close(fd); 362119734Sdougb exit(0); 363119734Sdougb } 364119734Sdougb 36596049Sfenner if (kdhl.panicstring[0]) 36696049Sfenner syslog(LOG_ALERT, "reboot after panic: %s", kdhl.panicstring); 36796049Sfenner else 36896049Sfenner syslog(LOG_ALERT, "reboot"); 36994580Smarcel 37096049Sfenner if (verbose) 37196049Sfenner printf("Checking for available free space\n"); 37296025Smux if (!check_space(savedir, dumpsize)) { 37396025Smux nerr++; 37496025Smux goto closefd; 37596025Smux } 37696049Sfenner 377147506Sdwhite writebounds(bounds + 1); 378147506Sdwhite 37996049Sfenner sprintf(buf, "info.%d", bounds); 38096049Sfenner 38194580Smarcel /* 382142359Sobrien * Create or overwrite any existing dump header files. 38394580Smarcel */ 38494580Smarcel fdinfo = open(buf, O_WRONLY | O_CREAT | O_TRUNC, 0600); 38593492Sphk if (fdinfo < 0) { 38696049Sfenner syslog(LOG_ERR, "%s: %m", buf); 38796025Smux nerr++; 38894580Smarcel goto closefd; 3891558Srgrimes } 39096049Sfenner oumask = umask(S_IRWXG|S_IRWXO); /* Restrict access to the core file.*/ 39196049Sfenner if (compress) { 39296049Sfenner sprintf(buf, "vmcore.%d.gz", bounds); 39396049Sfenner fp = zopen(buf, "w"); 39496049Sfenner } else { 39596049Sfenner sprintf(buf, "vmcore.%d", bounds); 39696049Sfenner fp = fopen(buf, "w"); 39796049Sfenner } 39896049Sfenner if (fp == NULL) { 39996049Sfenner syslog(LOG_ERR, "%s: %m", buf); 40094580Smarcel close(fdinfo); 40196025Smux nerr++; 40294580Smarcel goto closefd; 40393492Sphk } 40496049Sfenner (void)umask(oumask); 40596049Sfenner 40693492Sphk info = fdopen(fdinfo, "w"); 40794580Smarcel 40894580Smarcel if (verbose) 409142359Sobrien printheader(stdout, &kdhl, device, bounds, status); 41094580Smarcel 411142359Sobrien printheader(info, &kdhl, device, bounds, status); 41296049Sfenner fclose(info); 41394580Smarcel 41496049Sfenner syslog(LOG_NOTICE, "writing %score to %s", 41596049Sfenner compress ? "compressed " : "", buf); 41694580Smarcel 41793492Sphk while (dumpsize > 0) { 41897746Smarcel wl = BUFFERSIZE; 41993492Sphk if (wl > dumpsize) 42093492Sphk wl = dumpsize; 42196049Sfenner nr = read(fd, buf, wl); 42296049Sfenner if (nr != wl) { 42396049Sfenner if (nr == 0) 42496049Sfenner syslog(LOG_WARNING, 42596049Sfenner "WARNING: EOF on dump device"); 42696049Sfenner else 42796049Sfenner syslog(LOG_ERR, "read error on %s: %m", device); 42896025Smux nerr++; 42994580Smarcel goto closeall; 43067264Sdes } 43196049Sfenner if (compress) { 43296049Sfenner nw = fwrite(buf, 1, wl, fp); 43396049Sfenner } else { 43496049Sfenner for (nw = 0; nw < nr; nw = he) { 435142533Sobrien /* find a contiguous block of zeroes */ 436142533Sobrien for (hs = nw; hs < nr; hs += BLOCKSIZE) { 437142533Sobrien for (he = hs; he < nr && buf[he] == 0; 438142533Sobrien ++he) 439142533Sobrien /* nothing */ ; 440142533Sobrien /* is the hole long enough to matter? */ 441142533Sobrien if (he >= hs + BLOCKSIZE) 442142533Sobrien break; 443142533Sobrien } 44496049Sfenner 445142533Sobrien /* back down to a block boundary */ 446142533Sobrien he &= BLOCKMASK; 44796049Sfenner 448142533Sobrien /* 449142533Sobrien * 1) Don't go beyond the end of the buffer. 450142533Sobrien * 2) If the end of the buffer is less than 451142533Sobrien * BLOCKSIZE bytes away, we're at the end 452142533Sobrien * of the file, so just grab what's left. 453142533Sobrien */ 454142533Sobrien if (hs + BLOCKSIZE > nr) 455142533Sobrien hs = he = nr; 456142533Sobrien 457142533Sobrien /* 458142533Sobrien * At this point, we have a partial ordering: 459142533Sobrien * nw <= hs <= he <= nr 460142533Sobrien * If hs > nw, buf[nw..hs] contains non-zero data. 461142533Sobrien * If he > hs, buf[hs..he] is all zeroes. 462142533Sobrien */ 463142533Sobrien if (hs > nw) 464142533Sobrien if (fwrite(buf + nw, hs - nw, 1, fp) 465142533Sobrien != 1) 466142533Sobrien break; 467142533Sobrien if (he > hs) 468142533Sobrien if (fseeko(fp, he - hs, SEEK_CUR) == -1) 469142533Sobrien break; 47096049Sfenner } 47196049Sfenner } 47296049Sfenner if (nw != wl) { 47396049Sfenner syslog(LOG_ERR, 47496049Sfenner "write error on vmcore.%d file: %m", bounds); 47596049Sfenner syslog(LOG_WARNING, 47696049Sfenner "WARNING: vmcore may be incomplete"); 47796025Smux nerr++; 47894580Smarcel goto closeall; 47993492Sphk } 48096049Sfenner if (verbose) { 48196049Sfenner dmpcnt += wl; 48296103Smarcel printf("%llu\r", (unsigned long long)dmpcnt); 48396049Sfenner fflush(stdout); 48496049Sfenner } 48593492Sphk dumpsize -= wl; 48667264Sdes } 48796049Sfenner if (verbose) 48896049Sfenner printf("\n"); 48996049Sfenner 49096049Sfenner if (fclose(fp) < 0) { 49196049Sfenner syslog(LOG_ERR, "error on vmcore.%d: %m", bounds); 49296049Sfenner nerr++; 49396049Sfenner goto closeall; 49496049Sfenner } 49596025Smux nsaved++; 49694580Smarcel 49794580Smarcel if (verbose) 49896049Sfenner printf("dump saved\n"); 49994580Smarcel 50096049Sfennernuke: 50194580Smarcel if (clear || !keep) { 50294580Smarcel if (verbose) 50396049Sfenner printf("clearing dump header\n"); 50496049Sfenner memcpy(kdhl.magic, KERNELDUMPMAGIC_CLEARED, sizeof kdhl.magic); 50594580Smarcel lseek(fd, lasthd, SEEK_SET); 50694580Smarcel error = write(fd, &kdhl, sizeof kdhl); 50794580Smarcel if (error != sizeof kdhl) 50896049Sfenner syslog(LOG_ERR, 50996049Sfenner "error while clearing the dump header: %m"); 51094580Smarcel } 51194580Smarcel close(fd); 51294580Smarcel return; 51394580Smarcel 51496049Sfennercloseall: 51596049Sfenner fclose(fp); 51694580Smarcel 51796049Sfennerclosefd: 51894580Smarcel close(fd); 5191558Srgrimes} 5201558Srgrimes 52193492Sphkstatic void 52293492Sphkusage(void) 5231558Srgrimes{ 524141611Sru fprintf(stderr, "%s\n%s\n%s\n", 525141611Sru "usage: savecore -c", 526141611Sru " savecore -C [-v] [directory device]", 527141611Sru " savecore [-fkvz] [directory [device ...]]"); 52893492Sphk exit (1); 5291558Srgrimes} 5301558Srgrimes 53118914Sfennerint 53293492Sphkmain(int argc, char **argv) 5331558Srgrimes{ 534146763Sdelphij const char *savedir = "."; 535142533Sobrien struct fstab *fsp; 53693492Sphk int i, ch, error; 5371558Srgrimes 538142359Sobrien checkfor = compress = clear = force = keep = verbose = 0; 539142359Sobrien nfound = nsaved = nerr = 0; 540142359Sobrien 54196049Sfenner openlog("savecore", LOG_PERROR, LOG_DAEMON); 54296049Sfenner 543126347Smaxim while ((ch = getopt(argc, argv, "Ccfkvz")) != -1) 54493492Sphk switch(ch) { 545119734Sdougb case 'C': 546119734Sdougb checkfor = 1; 547119734Sdougb break; 54893492Sphk case 'c': 54994580Smarcel clear = 1; 55094580Smarcel break; 55194580Smarcel case 'k': 55294580Smarcel keep = 1; 55394580Smarcel break; 55493492Sphk case 'v': 555142359Sobrien verbose++; 55694580Smarcel break; 55793492Sphk case 'f': 55894580Smarcel force = 1; 55994580Smarcel break; 56096049Sfenner case 'z': 56196049Sfenner compress = 1; 56296049Sfenner break; 56393492Sphk case '?': 56493492Sphk default: 56593492Sphk usage(); 56693492Sphk } 567119734Sdougb if (checkfor && (clear || force || keep)) 568119734Sdougb usage(); 56993492Sphk argc -= optind; 57093492Sphk argv += optind; 57193492Sphk if (argc >= 1) { 57293492Sphk error = chdir(argv[0]); 57396049Sfenner if (error) { 57496049Sfenner syslog(LOG_ERR, "chdir(%s): %m", argv[0]); 57596049Sfenner exit(1); 57696049Sfenner } 57796025Smux savedir = argv[0]; 57893492Sphk argc--; 57993492Sphk argv++; 5801558Srgrimes } 58193492Sphk if (argc == 0) { 58293492Sphk for (;;) { 58393492Sphk fsp = getfsent(); 58493492Sphk if (fsp == NULL) 58593492Sphk break; 58693492Sphk if (strcmp(fsp->fs_vfstype, "swap") && 58793492Sphk strcmp(fsp->fs_vfstype, "dump")) 58893492Sphk continue; 58996025Smux DoFile(savedir, fsp->fs_spec); 59093492Sphk } 59193492Sphk } else { 59293492Sphk for (i = 0; i < argc; i++) 59396025Smux DoFile(savedir, argv[i]); 5941558Srgrimes } 59594580Smarcel 59694580Smarcel /* Emit minimal output. */ 597119734Sdougb if (nfound == 0) { 598119734Sdougb if (checkfor) { 599119734Sdougb printf("No dump exists\n"); 600119734Sdougb exit(1); 601119734Sdougb } 60296049Sfenner syslog(LOG_WARNING, "no dumps found"); 603119734Sdougb } 60496025Smux else if (nsaved == 0) { 60596025Smux if (nerr != 0) 60696049Sfenner syslog(LOG_WARNING, "unsaved dumps found but not saved"); 60796025Smux else 60896049Sfenner syslog(LOG_WARNING, "no unsaved dumps found"); 60996025Smux } 61094580Smarcel 61193492Sphk return (0); 6121558Srgrimes} 613