Declare how many cores we saved, and where we saved them to. Drop a comment about emitting little information; it's obvious from the block in question that we emit nothing without verbose. Reviewed by: markj Sponsored by: NetApp, Inc. Sponsored by: Klara, Inc. X-NetApp-PR: #65 Differential Revision: https://reviews.freebsd.org/D31393
1347 lines
33 KiB
C
1347 lines
33 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2002 Poul-Henning Kamp
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by Poul-Henning Kamp
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* and NAI Labs, the Security Research Division of Network Associates, Inc.
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* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
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* DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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|
* notice, this list of conditions and the following disclaimer in the
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|
* documentation and/or other materials provided with the distribution.
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* 3. The names of the authors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Copyright (c) 1986, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
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* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/disk.h>
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#include <sys/kerneldump.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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|
|
#include <capsicum_helpers.h>
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#include <ctype.h>
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|
#include <errno.h>
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|
#include <fcntl.h>
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|
#include <fstab.h>
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|
#include <paths.h>
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|
#include <signal.h>
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|
#include <stdarg.h>
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|
#include <stdbool.h>
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|
#include <stdio.h>
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|
#include <stdlib.h>
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|
#include <string.h>
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|
#include <syslog.h>
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|
#include <time.h>
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|
#include <unistd.h>
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|
#define Z_SOLO
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|
#include <zlib.h>
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|
#include <zstd.h>
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|
|
|
#include <libcasper.h>
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|
#include <casper/cap_fileargs.h>
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|
#include <casper/cap_syslog.h>
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|
|
#include <libxo/xo.h>
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|
|
|
/* The size of the buffer used for I/O. */
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#define BUFFERSIZE (1024*1024)
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|
|
#define STATUS_BAD 0
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#define STATUS_GOOD 1
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#define STATUS_UNKNOWN 2
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|
|
|
static cap_channel_t *capsyslog;
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|
static fileargs_t *capfa;
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static bool checkfor, compress, uncompress, clear, force, keep; /* flags */
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|
static int verbose;
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|
static int nfound, nsaved, nerr; /* statistics */
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|
static int maxdumps;
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|
|
|
extern FILE *zdopen(int, const char *);
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|
static sig_atomic_t got_siginfo;
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|
static void infohandler(int);
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|
|
|
static void
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|
logmsg(int pri, const char *fmt, ...)
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|
{
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|
va_list ap;
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|
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|
va_start(ap, fmt);
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|
if (capsyslog != NULL)
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cap_vsyslog(capsyslog, pri, fmt, ap);
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else
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vsyslog(pri, fmt, ap);
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va_end(ap);
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|
}
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|
|
|
static FILE *
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|
xfopenat(int dirfd, const char *path, int flags, const char *modestr, ...)
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|
{
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|
va_list ap;
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|
FILE *fp;
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|
mode_t mode;
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|
int error, fd;
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|
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|
if ((flags & O_CREAT) == O_CREAT) {
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va_start(ap, modestr);
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mode = (mode_t)va_arg(ap, int);
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va_end(ap);
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} else
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mode = 0;
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|
fd = openat(dirfd, path, flags, mode);
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if (fd < 0)
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|
return (NULL);
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fp = fdopen(fd, modestr);
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|
if (fp == NULL) {
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error = errno;
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|
(void)close(fd);
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errno = error;
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}
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return (fp);
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}
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|
|
static void
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printheader(xo_handle_t *xo, const struct kerneldumpheader *h,
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const char *device, int bounds, const int status)
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|
{
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uint64_t dumplen;
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|
time_t t;
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|
struct tm tm;
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|
char time_str[64];
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const char *stat_str;
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const char *comp_str;
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|
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|
xo_flush_h(xo);
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xo_emit_h(xo, "{Lwc:Dump header from device}{:dump_device/%s}\n",
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device);
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xo_emit_h(xo, "{P: }{Lwc:Architecture}{:architecture/%s}\n",
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h->architecture);
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xo_emit_h(xo,
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"{P: }{Lwc:Architecture Version}{:architecture_version/%u}\n",
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dtoh32(h->architectureversion));
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dumplen = dtoh64(h->dumplength);
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xo_emit_h(xo, "{P: }{Lwc:Dump Length}{:dump_length_bytes/%lld}\n",
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(long long)dumplen);
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xo_emit_h(xo, "{P: }{Lwc:Blocksize}{:blocksize/%d}\n",
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dtoh32(h->blocksize));
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switch (h->compression) {
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case KERNELDUMP_COMP_NONE:
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comp_str = "none";
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break;
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case KERNELDUMP_COMP_GZIP:
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comp_str = "gzip";
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break;
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case KERNELDUMP_COMP_ZSTD:
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comp_str = "zstd";
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break;
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default:
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|
comp_str = "???";
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|
break;
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|
}
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|
xo_emit_h(xo, "{P: }{Lwc:Compression}{:compression/%s}\n", comp_str);
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t = dtoh64(h->dumptime);
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localtime_r(&t, &tm);
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if (strftime(time_str, sizeof(time_str), "%F %T %z", &tm) == 0)
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time_str[0] = '\0';
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xo_emit_h(xo, "{P: }{Lwc:Dumptime}{:dumptime/%s}\n", time_str);
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xo_emit_h(xo, "{P: }{Lwc:Hostname}{:hostname/%s}\n", h->hostname);
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|
xo_emit_h(xo, "{P: }{Lwc:Magic}{:magic/%s}\n", h->magic);
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|
xo_emit_h(xo, "{P: }{Lwc:Version String}{:version_string/%s}",
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h->versionstring);
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|
xo_emit_h(xo, "{P: }{Lwc:Panic String}{:panic_string/%s}\n",
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h->panicstring);
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|
xo_emit_h(xo, "{P: }{Lwc:Dump Parity}{:dump_parity/%u}\n", h->parity);
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xo_emit_h(xo, "{P: }{Lwc:Bounds}{:bounds/%d}\n", bounds);
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switch (status) {
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case STATUS_BAD:
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stat_str = "bad";
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break;
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case STATUS_GOOD:
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|
stat_str = "good";
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break;
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|
default:
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|
stat_str = "unknown";
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break;
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}
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xo_emit_h(xo, "{P: }{Lwc:Dump Status}{:dump_status/%s}\n", stat_str);
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xo_flush_h(xo);
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|
}
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|
static int
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getbounds(int savedirfd)
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{
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FILE *fp;
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|
char buf[6];
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int ret;
|
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|
|
/*
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|
* If we are just checking, then we haven't done a chdir to the dump
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|
* directory and we should not try to read a bounds file.
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|
*/
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if (checkfor)
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return (0);
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|
ret = 0;
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|
if ((fp = xfopenat(savedirfd, "bounds", O_RDONLY, "r")) == NULL) {
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if (verbose)
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printf("unable to open bounds file, using 0\n");
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return (ret);
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|
}
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if (fgets(buf, sizeof(buf), fp) == NULL) {
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if (feof(fp))
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logmsg(LOG_WARNING, "bounds file is empty, using 0");
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else
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logmsg(LOG_WARNING, "bounds file: %s", strerror(errno));
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fclose(fp);
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return (ret);
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}
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|
errno = 0;
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|
ret = (int)strtol(buf, NULL, 10);
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|
if (ret == 0 && (errno == EINVAL || errno == ERANGE))
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logmsg(LOG_WARNING, "invalid value found in bounds, using 0");
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fclose(fp);
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return (ret);
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}
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|
static void
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writebounds(int savedirfd, int bounds)
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{
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FILE *fp;
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if ((fp = xfopenat(savedirfd, "bounds", O_WRONLY | O_CREAT | O_TRUNC,
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"w", 0644)) == NULL) {
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logmsg(LOG_WARNING, "unable to write to bounds file: %m");
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return;
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}
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|
|
if (verbose)
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printf("bounds number: %d\n", bounds);
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fprintf(fp, "%d\n", bounds);
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fclose(fp);
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}
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|
|
static bool
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writekey(int savedirfd, const char *keyname, uint8_t *dumpkey,
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uint32_t dumpkeysize)
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|
{
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int fd;
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|
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|
fd = openat(savedirfd, keyname, O_WRONLY | O_CREAT | O_TRUNC, 0600);
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if (fd == -1) {
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logmsg(LOG_ERR, "Unable to open %s to write the key: %m.",
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keyname);
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return (false);
|
|
}
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|
|
|
if (write(fd, dumpkey, dumpkeysize) != (ssize_t)dumpkeysize) {
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logmsg(LOG_ERR, "Unable to write the key to %s: %m.", keyname);
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close(fd);
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|
return (false);
|
|
}
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|
|
|
close(fd);
|
|
return (true);
|
|
}
|
|
|
|
static off_t
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file_size(int savedirfd, const char *path)
|
|
{
|
|
struct stat sb;
|
|
|
|
/* Ignore all errors, this file may not exist. */
|
|
if (fstatat(savedirfd, path, &sb, 0) == -1)
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|
return (0);
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|
return (sb.st_size);
|
|
}
|
|
|
|
static off_t
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saved_dump_size(int savedirfd, int bounds)
|
|
{
|
|
static char path[PATH_MAX];
|
|
off_t dumpsize;
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|
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|
dumpsize = 0;
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|
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(void)snprintf(path, sizeof(path), "info.%d", bounds);
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dumpsize += file_size(savedirfd, path);
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(void)snprintf(path, sizeof(path), "vmcore.%d", bounds);
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dumpsize += file_size(savedirfd, path);
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(void)snprintf(path, sizeof(path), "vmcore.%d.gz", bounds);
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|
dumpsize += file_size(savedirfd, path);
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(void)snprintf(path, sizeof(path), "vmcore.%d.zst", bounds);
|
|
dumpsize += file_size(savedirfd, path);
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|
(void)snprintf(path, sizeof(path), "textdump.tar.%d", bounds);
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|
dumpsize += file_size(savedirfd, path);
|
|
(void)snprintf(path, sizeof(path), "textdump.tar.%d.gz", bounds);
|
|
dumpsize += file_size(savedirfd, path);
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|
|
|
return (dumpsize);
|
|
}
|
|
|
|
static void
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|
saved_dump_remove(int savedirfd, int bounds)
|
|
{
|
|
static char path[PATH_MAX];
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|
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|
(void)snprintf(path, sizeof(path), "info.%d", bounds);
|
|
(void)unlinkat(savedirfd, path, 0);
|
|
(void)snprintf(path, sizeof(path), "vmcore.%d", bounds);
|
|
(void)unlinkat(savedirfd, path, 0);
|
|
(void)snprintf(path, sizeof(path), "vmcore.%d.gz", bounds);
|
|
(void)unlinkat(savedirfd, path, 0);
|
|
(void)snprintf(path, sizeof(path), "vmcore.%d.zst", bounds);
|
|
(void)unlinkat(savedirfd, path, 0);
|
|
(void)snprintf(path, sizeof(path), "textdump.tar.%d", bounds);
|
|
(void)unlinkat(savedirfd, path, 0);
|
|
(void)snprintf(path, sizeof(path), "textdump.tar.%d.gz", bounds);
|
|
(void)unlinkat(savedirfd, path, 0);
|
|
}
|
|
|
|
static void
|
|
symlinks_remove(int savedirfd)
|
|
{
|
|
|
|
(void)unlinkat(savedirfd, "info.last", 0);
|
|
(void)unlinkat(savedirfd, "key.last", 0);
|
|
(void)unlinkat(savedirfd, "vmcore.last", 0);
|
|
(void)unlinkat(savedirfd, "vmcore.last.gz", 0);
|
|
(void)unlinkat(savedirfd, "vmcore.last.zst", 0);
|
|
(void)unlinkat(savedirfd, "vmcore_encrypted.last", 0);
|
|
(void)unlinkat(savedirfd, "vmcore_encrypted.last.gz", 0);
|
|
(void)unlinkat(savedirfd, "textdump.tar.last", 0);
|
|
(void)unlinkat(savedirfd, "textdump.tar.last.gz", 0);
|
|
}
|
|
|
|
/*
|
|
* Check that sufficient space is available on the disk that holds the
|
|
* save directory.
|
|
*/
|
|
static int
|
|
check_space(const char *savedir, int savedirfd, off_t dumpsize, int bounds)
|
|
{
|
|
char buf[100];
|
|
struct statfs fsbuf;
|
|
FILE *fp;
|
|
off_t available, minfree, spacefree, totfree, needed;
|
|
|
|
if (fstatfs(savedirfd, &fsbuf) < 0) {
|
|
logmsg(LOG_ERR, "%s: %m", savedir);
|
|
exit(1);
|
|
}
|
|
spacefree = ((off_t) fsbuf.f_bavail * fsbuf.f_bsize) / 1024;
|
|
totfree = ((off_t) fsbuf.f_bfree * fsbuf.f_bsize) / 1024;
|
|
|
|
if ((fp = xfopenat(savedirfd, "minfree", O_RDONLY, "r")) == NULL)
|
|
minfree = 0;
|
|
else {
|
|
if (fgets(buf, sizeof(buf), fp) == NULL)
|
|
minfree = 0;
|
|
else {
|
|
char *endp;
|
|
|
|
errno = 0;
|
|
minfree = strtoll(buf, &endp, 10);
|
|
if (minfree == 0 && errno != 0)
|
|
minfree = -1;
|
|
else {
|
|
while (*endp != '\0' && isspace(*endp))
|
|
endp++;
|
|
if (*endp != '\0' || minfree < 0)
|
|
minfree = -1;
|
|
}
|
|
if (minfree < 0)
|
|
logmsg(LOG_WARNING,
|
|
"`minfree` didn't contain a valid size "
|
|
"(`%s`). Defaulting to 0", buf);
|
|
}
|
|
(void)fclose(fp);
|
|
}
|
|
|
|
available = minfree > 0 ? spacefree - minfree : totfree;
|
|
needed = dumpsize / 1024 + 2; /* 2 for info file */
|
|
needed -= saved_dump_size(savedirfd, bounds);
|
|
if (available < needed) {
|
|
logmsg(LOG_WARNING,
|
|
"no dump: not enough free space on device (need at least "
|
|
"%jdkB for dump; %jdkB available; %jdkB reserved)",
|
|
(intmax_t)needed,
|
|
(intmax_t)available + minfree,
|
|
(intmax_t)minfree);
|
|
return (0);
|
|
}
|
|
if (spacefree - needed < 0)
|
|
logmsg(LOG_WARNING,
|
|
"dump performed, but free space threshold crossed");
|
|
return (1);
|
|
}
|
|
|
|
static bool
|
|
compare_magic(const struct kerneldumpheader *kdh, const char *magic)
|
|
{
|
|
|
|
return (strncmp(kdh->magic, magic, sizeof(kdh->magic)) == 0);
|
|
}
|
|
|
|
#define BLOCKSIZE (1<<12)
|
|
#define BLOCKMASK (~(BLOCKSIZE-1))
|
|
|
|
static size_t
|
|
sparsefwrite(const char *buf, size_t nr, FILE *fp)
|
|
{
|
|
size_t nw, he, hs;
|
|
|
|
for (nw = 0; nw < nr; nw = he) {
|
|
/* find a contiguous block of zeroes */
|
|
for (hs = nw; hs < nr; hs += BLOCKSIZE) {
|
|
for (he = hs; he < nr && buf[he] == 0; ++he)
|
|
/* nothing */ ;
|
|
/* is the hole long enough to matter? */
|
|
if (he >= hs + BLOCKSIZE)
|
|
break;
|
|
}
|
|
|
|
/* back down to a block boundary */
|
|
he &= BLOCKMASK;
|
|
|
|
/*
|
|
* 1) Don't go beyond the end of the buffer.
|
|
* 2) If the end of the buffer is less than
|
|
* BLOCKSIZE bytes away, we're at the end
|
|
* of the file, so just grab what's left.
|
|
*/
|
|
if (hs + BLOCKSIZE > nr)
|
|
hs = he = nr;
|
|
|
|
/*
|
|
* At this point, we have a partial ordering:
|
|
* nw <= hs <= he <= nr
|
|
* If hs > nw, buf[nw..hs] contains non-zero
|
|
* data. If he > hs, buf[hs..he] is all zeroes.
|
|
*/
|
|
if (hs > nw)
|
|
if (fwrite(buf + nw, hs - nw, 1, fp) != 1)
|
|
break;
|
|
if (he > hs)
|
|
if (fseeko(fp, he - hs, SEEK_CUR) == -1)
|
|
break;
|
|
}
|
|
|
|
return (nw);
|
|
}
|
|
|
|
static char *zbuf;
|
|
static size_t zbufsize;
|
|
|
|
static ssize_t
|
|
GunzipWrite(z_stream *z, char *in, size_t insize, FILE *fp)
|
|
{
|
|
static bool firstblock = true; /* XXX not re-entrable/usable */
|
|
const size_t hdrlen = 10;
|
|
size_t nw = 0, w;
|
|
int rv;
|
|
|
|
z->next_in = in;
|
|
z->avail_in = insize;
|
|
/*
|
|
* Since contrib/zlib for some reason is compiled
|
|
* without GUNZIP define, we need to skip the gzip
|
|
* header manually. Kernel puts minimal 10 byte
|
|
* header, see sys/kern/subr_compressor.c:gz_reset().
|
|
*/
|
|
if (firstblock) {
|
|
z->next_in += hdrlen;
|
|
z->avail_in -= hdrlen;
|
|
firstblock = false;
|
|
}
|
|
do {
|
|
z->next_out = zbuf;
|
|
z->avail_out = zbufsize;
|
|
rv = inflate(z, Z_NO_FLUSH);
|
|
if (rv != Z_OK && rv != Z_STREAM_END) {
|
|
logmsg(LOG_ERR, "decompression failed: %s", z->msg);
|
|
return (-1);
|
|
}
|
|
w = sparsefwrite(zbuf, zbufsize - z->avail_out, fp);
|
|
if (w < zbufsize - z->avail_out)
|
|
return (-1);
|
|
nw += w;
|
|
} while (z->avail_in > 0 && rv != Z_STREAM_END);
|
|
|
|
return (nw);
|
|
}
|
|
|
|
static ssize_t
|
|
ZstdWrite(ZSTD_DCtx *Zctx, char *in, size_t insize, FILE *fp)
|
|
{
|
|
ZSTD_inBuffer Zin;
|
|
ZSTD_outBuffer Zout;
|
|
size_t nw = 0, w;
|
|
int rv;
|
|
|
|
Zin.src = in;
|
|
Zin.size = insize;
|
|
Zin.pos = 0;
|
|
do {
|
|
Zout.dst = zbuf;
|
|
Zout.size = zbufsize;
|
|
Zout.pos = 0;
|
|
rv = ZSTD_decompressStream(Zctx, &Zout, &Zin);
|
|
if (ZSTD_isError(rv)) {
|
|
logmsg(LOG_ERR, "decompression failed: %s",
|
|
ZSTD_getErrorName(rv));
|
|
return (-1);
|
|
}
|
|
w = sparsefwrite(zbuf, Zout.pos, fp);
|
|
if (w < Zout.pos)
|
|
return (-1);
|
|
nw += w;
|
|
} while (Zin.pos < Zin.size && rv != 0);
|
|
|
|
return (nw);
|
|
}
|
|
|
|
static int
|
|
DoRegularFile(int fd, off_t dumpsize, u_int sectorsize, bool sparse,
|
|
uint8_t compression, char *buf, const char *device,
|
|
const char *filename, FILE *fp)
|
|
{
|
|
size_t nr, wl;
|
|
ssize_t nw;
|
|
off_t dmpcnt, origsize;
|
|
z_stream z; /* gzip */
|
|
ZSTD_DCtx *Zctx; /* zstd */
|
|
|
|
dmpcnt = 0;
|
|
origsize = dumpsize;
|
|
if (compression == KERNELDUMP_COMP_GZIP) {
|
|
memset(&z, 0, sizeof(z));
|
|
z.zalloc = Z_NULL;
|
|
z.zfree = Z_NULL;
|
|
if (inflateInit2(&z, -MAX_WBITS) != Z_OK) {
|
|
logmsg(LOG_ERR, "failed to initialize zlib: %s", z.msg);
|
|
return (-1);
|
|
}
|
|
zbufsize = BUFFERSIZE;
|
|
} else if (compression == KERNELDUMP_COMP_ZSTD) {
|
|
if ((Zctx = ZSTD_createDCtx()) == NULL) {
|
|
logmsg(LOG_ERR, "failed to initialize zstd");
|
|
return (-1);
|
|
}
|
|
zbufsize = ZSTD_DStreamOutSize();
|
|
}
|
|
if (zbufsize > 0)
|
|
if ((zbuf = malloc(zbufsize)) == NULL) {
|
|
logmsg(LOG_ERR, "failed to alloc decompression buffer");
|
|
return (-1);
|
|
}
|
|
|
|
while (dumpsize > 0) {
|
|
wl = BUFFERSIZE;
|
|
if (wl > (size_t)dumpsize)
|
|
wl = dumpsize;
|
|
nr = read(fd, buf, roundup(wl, sectorsize));
|
|
if (nr != roundup(wl, sectorsize)) {
|
|
if (nr == 0)
|
|
logmsg(LOG_WARNING,
|
|
"WARNING: EOF on dump device");
|
|
else
|
|
logmsg(LOG_ERR, "read error on %s: %m", device);
|
|
nerr++;
|
|
return (-1);
|
|
}
|
|
if (compression == KERNELDUMP_COMP_GZIP)
|
|
nw = GunzipWrite(&z, buf, nr, fp);
|
|
else if (compression == KERNELDUMP_COMP_ZSTD)
|
|
nw = ZstdWrite(Zctx, buf, nr, fp);
|
|
else if (!sparse)
|
|
nw = fwrite(buf, 1, wl, fp);
|
|
else
|
|
nw = sparsefwrite(buf, wl, fp);
|
|
if (nw < 0 || (compression == KERNELDUMP_COMP_NONE &&
|
|
(size_t)nw != wl)) {
|
|
logmsg(LOG_ERR,
|
|
"write error on %s file: %m", filename);
|
|
logmsg(LOG_WARNING,
|
|
"WARNING: vmcore may be incomplete");
|
|
nerr++;
|
|
return (-1);
|
|
}
|
|
if (verbose) {
|
|
dmpcnt += wl;
|
|
printf("%llu\r", (unsigned long long)dmpcnt);
|
|
fflush(stdout);
|
|
}
|
|
dumpsize -= wl;
|
|
if (got_siginfo) {
|
|
printf("%s %.1lf%%\n", filename, (100.0 - (100.0 *
|
|
(double)dumpsize / (double)origsize)));
|
|
got_siginfo = 0;
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Specialized version of dump-reading logic for use with textdumps, which
|
|
* are written backwards from the end of the partition, and must be reversed
|
|
* before being written to the file. Textdumps are small, so do a bit less
|
|
* work to optimize/sparsify.
|
|
*/
|
|
static int
|
|
DoTextdumpFile(int fd, off_t dumpsize, off_t lasthd, char *buf,
|
|
const char *device, const char *filename, FILE *fp)
|
|
{
|
|
int nr, nw, wl;
|
|
off_t dmpcnt, totsize;
|
|
|
|
totsize = dumpsize;
|
|
dmpcnt = 0;
|
|
wl = 512;
|
|
if ((dumpsize % wl) != 0) {
|
|
logmsg(LOG_ERR, "textdump uneven multiple of 512 on %s",
|
|
device);
|
|
nerr++;
|
|
return (-1);
|
|
}
|
|
while (dumpsize > 0) {
|
|
nr = pread(fd, buf, wl, lasthd - (totsize - dumpsize) - wl);
|
|
if (nr != wl) {
|
|
if (nr == 0)
|
|
logmsg(LOG_WARNING,
|
|
"WARNING: EOF on dump device");
|
|
else
|
|
logmsg(LOG_ERR, "read error on %s: %m", device);
|
|
nerr++;
|
|
return (-1);
|
|
}
|
|
nw = fwrite(buf, 1, wl, fp);
|
|
if (nw != wl) {
|
|
logmsg(LOG_ERR,
|
|
"write error on %s file: %m", filename);
|
|
logmsg(LOG_WARNING,
|
|
"WARNING: textdump may be incomplete");
|
|
nerr++;
|
|
return (-1);
|
|
}
|
|
if (verbose) {
|
|
dmpcnt += wl;
|
|
printf("%llu\r", (unsigned long long)dmpcnt);
|
|
fflush(stdout);
|
|
}
|
|
dumpsize -= wl;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
DoFile(const char *savedir, int savedirfd, const char *device)
|
|
{
|
|
xo_handle_t *xostdout, *xoinfo;
|
|
static char infoname[PATH_MAX], corename[PATH_MAX], linkname[PATH_MAX];
|
|
static char keyname[PATH_MAX];
|
|
static char *buf = NULL;
|
|
char *temp = NULL;
|
|
struct kerneldumpheader kdhf, kdhl;
|
|
uint8_t *dumpkey;
|
|
off_t mediasize, dumpextent, dumplength, firsthd, lasthd;
|
|
FILE *core, *info;
|
|
int fdcore, fddev, error;
|
|
int bounds, status;
|
|
u_int sectorsize, xostyle;
|
|
uint32_t dumpkeysize;
|
|
bool iscompressed, isencrypted, istextdump, ret;
|
|
|
|
bounds = getbounds(savedirfd);
|
|
dumpkey = NULL;
|
|
mediasize = 0;
|
|
status = STATUS_UNKNOWN;
|
|
|
|
xostdout = xo_create_to_file(stdout, XO_STYLE_TEXT, 0);
|
|
if (xostdout == NULL) {
|
|
logmsg(LOG_ERR, "%s: %m", infoname);
|
|
return;
|
|
}
|
|
|
|
if (maxdumps > 0 && bounds == maxdumps)
|
|
bounds = 0;
|
|
|
|
if (buf == NULL) {
|
|
buf = malloc(BUFFERSIZE);
|
|
if (buf == NULL) {
|
|
logmsg(LOG_ERR, "%m");
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (verbose)
|
|
printf("checking for kernel dump on device %s\n", device);
|
|
|
|
fddev = fileargs_open(capfa, device);
|
|
if (fddev < 0) {
|
|
logmsg(LOG_ERR, "%s: %m", device);
|
|
return;
|
|
}
|
|
|
|
error = ioctl(fddev, DIOCGMEDIASIZE, &mediasize);
|
|
if (!error)
|
|
error = ioctl(fddev, DIOCGSECTORSIZE, §orsize);
|
|
if (error) {
|
|
logmsg(LOG_ERR,
|
|
"couldn't find media and/or sector size of %s: %m", device);
|
|
goto closefd;
|
|
}
|
|
|
|
if (verbose) {
|
|
printf("mediasize = %lld bytes\n", (long long)mediasize);
|
|
printf("sectorsize = %u bytes\n", sectorsize);
|
|
}
|
|
|
|
if (sectorsize < sizeof(kdhl)) {
|
|
logmsg(LOG_ERR,
|
|
"Sector size is less the kernel dump header %zu",
|
|
sizeof(kdhl));
|
|
goto closefd;
|
|
}
|
|
|
|
lasthd = mediasize - sectorsize;
|
|
temp = malloc(sectorsize);
|
|
if (temp == NULL) {
|
|
logmsg(LOG_ERR, "%m");
|
|
goto closefd;
|
|
}
|
|
if (lseek(fddev, lasthd, SEEK_SET) != lasthd ||
|
|
read(fddev, temp, sectorsize) != (ssize_t)sectorsize) {
|
|
logmsg(LOG_ERR,
|
|
"error reading last dump header at offset %lld in %s: %m",
|
|
(long long)lasthd, device);
|
|
goto closefd;
|
|
}
|
|
memcpy(&kdhl, temp, sizeof(kdhl));
|
|
iscompressed = istextdump = false;
|
|
if (compare_magic(&kdhl, TEXTDUMPMAGIC)) {
|
|
if (verbose)
|
|
printf("textdump magic on last dump header on %s\n",
|
|
device);
|
|
istextdump = true;
|
|
if (dtoh32(kdhl.version) != KERNELDUMP_TEXT_VERSION) {
|
|
logmsg(LOG_ERR,
|
|
"unknown version (%d) in last dump header on %s",
|
|
dtoh32(kdhl.version), device);
|
|
|
|
status = STATUS_BAD;
|
|
if (!force)
|
|
goto closefd;
|
|
}
|
|
} else if (compare_magic(&kdhl, KERNELDUMPMAGIC)) {
|
|
if (dtoh32(kdhl.version) != KERNELDUMPVERSION) {
|
|
logmsg(LOG_ERR,
|
|
"unknown version (%d) in last dump header on %s",
|
|
dtoh32(kdhl.version), device);
|
|
|
|
status = STATUS_BAD;
|
|
if (!force)
|
|
goto closefd;
|
|
}
|
|
switch (kdhl.compression) {
|
|
case KERNELDUMP_COMP_NONE:
|
|
uncompress = false;
|
|
break;
|
|
case KERNELDUMP_COMP_GZIP:
|
|
case KERNELDUMP_COMP_ZSTD:
|
|
if (compress && verbose)
|
|
printf("dump is already compressed\n");
|
|
if (uncompress && verbose)
|
|
printf("dump to be uncompressed\n");
|
|
compress = false;
|
|
iscompressed = true;
|
|
break;
|
|
default:
|
|
logmsg(LOG_ERR, "unknown compression type %d on %s",
|
|
kdhl.compression, device);
|
|
break;
|
|
}
|
|
} else {
|
|
if (verbose)
|
|
printf("magic mismatch on last dump header on %s\n",
|
|
device);
|
|
|
|
status = STATUS_BAD;
|
|
if (!force)
|
|
goto closefd;
|
|
|
|
if (compare_magic(&kdhl, KERNELDUMPMAGIC_CLEARED)) {
|
|
if (verbose)
|
|
printf("forcing magic on %s\n", device);
|
|
memcpy(kdhl.magic, KERNELDUMPMAGIC, sizeof(kdhl.magic));
|
|
} else {
|
|
logmsg(LOG_ERR, "unable to force dump - bad magic");
|
|
goto closefd;
|
|
}
|
|
if (dtoh32(kdhl.version) != KERNELDUMPVERSION) {
|
|
logmsg(LOG_ERR,
|
|
"unknown version (%d) in last dump header on %s",
|
|
dtoh32(kdhl.version), device);
|
|
|
|
status = STATUS_BAD;
|
|
if (!force)
|
|
goto closefd;
|
|
}
|
|
}
|
|
|
|
nfound++;
|
|
if (clear)
|
|
goto nuke;
|
|
|
|
if (kerneldump_parity(&kdhl)) {
|
|
logmsg(LOG_ERR,
|
|
"parity error on last dump header on %s", device);
|
|
nerr++;
|
|
status = STATUS_BAD;
|
|
if (!force)
|
|
goto closefd;
|
|
}
|
|
dumpextent = dtoh64(kdhl.dumpextent);
|
|
dumplength = dtoh64(kdhl.dumplength);
|
|
dumpkeysize = dtoh32(kdhl.dumpkeysize);
|
|
firsthd = lasthd - dumpextent - sectorsize - dumpkeysize;
|
|
if (lseek(fddev, firsthd, SEEK_SET) != firsthd ||
|
|
read(fddev, temp, sectorsize) != (ssize_t)sectorsize) {
|
|
logmsg(LOG_ERR,
|
|
"error reading first dump header at offset %lld in %s: %m",
|
|
(long long)firsthd, device);
|
|
nerr++;
|
|
goto closefd;
|
|
}
|
|
memcpy(&kdhf, temp, sizeof(kdhf));
|
|
|
|
if (verbose >= 2) {
|
|
printf("First dump headers:\n");
|
|
printheader(xostdout, &kdhf, device, bounds, -1);
|
|
|
|
printf("\nLast dump headers:\n");
|
|
printheader(xostdout, &kdhl, device, bounds, -1);
|
|
printf("\n");
|
|
}
|
|
|
|
if (memcmp(&kdhl, &kdhf, sizeof(kdhl))) {
|
|
logmsg(LOG_ERR,
|
|
"first and last dump headers disagree on %s", device);
|
|
nerr++;
|
|
status = STATUS_BAD;
|
|
if (!force)
|
|
goto closefd;
|
|
} else {
|
|
status = STATUS_GOOD;
|
|
}
|
|
|
|
if (checkfor) {
|
|
printf("A dump exists on %s\n", device);
|
|
close(fddev);
|
|
exit(0);
|
|
}
|
|
|
|
if (kdhl.panicstring[0] != '\0')
|
|
logmsg(LOG_ALERT, "reboot after panic: %.*s",
|
|
(int)sizeof(kdhl.panicstring), kdhl.panicstring);
|
|
else
|
|
logmsg(LOG_ALERT, "reboot");
|
|
|
|
if (verbose)
|
|
printf("Checking for available free space\n");
|
|
|
|
if (!check_space(savedir, savedirfd, dumplength, bounds)) {
|
|
nerr++;
|
|
goto closefd;
|
|
}
|
|
|
|
writebounds(savedirfd, bounds + 1);
|
|
|
|
saved_dump_remove(savedirfd, bounds);
|
|
|
|
snprintf(infoname, sizeof(infoname), "info.%d", bounds);
|
|
|
|
/*
|
|
* Create or overwrite any existing dump header files.
|
|
*/
|
|
if ((info = xfopenat(savedirfd, infoname,
|
|
O_WRONLY | O_CREAT | O_TRUNC, "w", 0600)) == NULL) {
|
|
logmsg(LOG_ERR, "open(%s): %m", infoname);
|
|
nerr++;
|
|
goto closefd;
|
|
}
|
|
|
|
isencrypted = (dumpkeysize > 0);
|
|
if (compress)
|
|
snprintf(corename, sizeof(corename), "%s.%d.gz",
|
|
istextdump ? "textdump.tar" :
|
|
(isencrypted ? "vmcore_encrypted" : "vmcore"), bounds);
|
|
else if (iscompressed && !isencrypted && !uncompress)
|
|
snprintf(corename, sizeof(corename), "vmcore.%d.%s", bounds,
|
|
(kdhl.compression == KERNELDUMP_COMP_GZIP) ? "gz" : "zst");
|
|
else
|
|
snprintf(corename, sizeof(corename), "%s.%d",
|
|
istextdump ? "textdump.tar" :
|
|
(isencrypted ? "vmcore_encrypted" : "vmcore"), bounds);
|
|
fdcore = openat(savedirfd, corename, O_WRONLY | O_CREAT | O_TRUNC,
|
|
0600);
|
|
if (fdcore < 0) {
|
|
logmsg(LOG_ERR, "open(%s): %m", corename);
|
|
fclose(info);
|
|
nerr++;
|
|
goto closefd;
|
|
}
|
|
|
|
if (compress)
|
|
core = zdopen(fdcore, "w");
|
|
else
|
|
core = fdopen(fdcore, "w");
|
|
if (core == NULL) {
|
|
logmsg(LOG_ERR, "%s: %m", corename);
|
|
(void)close(fdcore);
|
|
(void)fclose(info);
|
|
nerr++;
|
|
goto closefd;
|
|
}
|
|
fdcore = -1;
|
|
|
|
xostyle = xo_get_style(NULL);
|
|
xoinfo = xo_create_to_file(info, xostyle, 0);
|
|
if (xoinfo == NULL) {
|
|
logmsg(LOG_ERR, "%s: %m", infoname);
|
|
fclose(info);
|
|
nerr++;
|
|
goto closeall;
|
|
}
|
|
xo_open_container_h(xoinfo, "crashdump");
|
|
|
|
if (verbose)
|
|
printheader(xostdout, &kdhl, device, bounds, status);
|
|
|
|
printheader(xoinfo, &kdhl, device, bounds, status);
|
|
xo_close_container_h(xoinfo, "crashdump");
|
|
xo_flush_h(xoinfo);
|
|
xo_finish_h(xoinfo);
|
|
fclose(info);
|
|
|
|
if (isencrypted) {
|
|
dumpkey = calloc(1, dumpkeysize);
|
|
if (dumpkey == NULL) {
|
|
logmsg(LOG_ERR, "Unable to allocate kernel dump key.");
|
|
nerr++;
|
|
goto closeall;
|
|
}
|
|
|
|
if (read(fddev, dumpkey, dumpkeysize) != (ssize_t)dumpkeysize) {
|
|
logmsg(LOG_ERR, "Unable to read kernel dump key: %m.");
|
|
nerr++;
|
|
goto closeall;
|
|
}
|
|
|
|
snprintf(keyname, sizeof(keyname), "key.%d", bounds);
|
|
ret = writekey(savedirfd, keyname, dumpkey, dumpkeysize);
|
|
explicit_bzero(dumpkey, dumpkeysize);
|
|
if (!ret) {
|
|
nerr++;
|
|
goto closeall;
|
|
}
|
|
}
|
|
|
|
logmsg(LOG_NOTICE, "writing %s%score to %s/%s",
|
|
isencrypted ? "encrypted " : "", compress ? "compressed " : "",
|
|
savedir, corename);
|
|
|
|
if (istextdump) {
|
|
if (DoTextdumpFile(fddev, dumplength, lasthd, buf, device,
|
|
corename, core) < 0)
|
|
goto closeall;
|
|
} else {
|
|
if (DoRegularFile(fddev, dumplength, sectorsize,
|
|
!(compress || iscompressed || isencrypted),
|
|
uncompress ? kdhl.compression : KERNELDUMP_COMP_NONE,
|
|
buf, device, corename, core) < 0) {
|
|
goto closeall;
|
|
}
|
|
}
|
|
if (verbose)
|
|
printf("\n");
|
|
|
|
if (fclose(core) < 0) {
|
|
logmsg(LOG_ERR, "error on %s: %m", corename);
|
|
nerr++;
|
|
goto closefd;
|
|
}
|
|
|
|
symlinks_remove(savedirfd);
|
|
if (symlinkat(infoname, savedirfd, "info.last") == -1) {
|
|
logmsg(LOG_WARNING, "unable to create symlink %s/%s: %m",
|
|
savedir, "info.last");
|
|
}
|
|
if (isencrypted) {
|
|
if (symlinkat(keyname, savedirfd, "key.last") == -1) {
|
|
logmsg(LOG_WARNING,
|
|
"unable to create symlink %s/%s: %m", savedir,
|
|
"key.last");
|
|
}
|
|
}
|
|
if ((iscompressed && !uncompress) || compress) {
|
|
snprintf(linkname, sizeof(linkname), "%s.last.%s",
|
|
istextdump ? "textdump.tar" :
|
|
(isencrypted ? "vmcore_encrypted" : "vmcore"),
|
|
(kdhl.compression == KERNELDUMP_COMP_ZSTD) ? "zst" : "gz");
|
|
} else {
|
|
snprintf(linkname, sizeof(linkname), "%s.last",
|
|
istextdump ? "textdump.tar" :
|
|
(isencrypted ? "vmcore_encrypted" : "vmcore"));
|
|
}
|
|
if (symlinkat(corename, savedirfd, linkname) == -1) {
|
|
logmsg(LOG_WARNING, "unable to create symlink %s/%s: %m",
|
|
savedir, linkname);
|
|
}
|
|
|
|
nsaved++;
|
|
|
|
if (verbose)
|
|
printf("dump saved\n");
|
|
|
|
nuke:
|
|
if (!keep) {
|
|
if (verbose)
|
|
printf("clearing dump header\n");
|
|
memcpy(kdhl.magic, KERNELDUMPMAGIC_CLEARED, sizeof(kdhl.magic));
|
|
memcpy(temp, &kdhl, sizeof(kdhl));
|
|
if (lseek(fddev, lasthd, SEEK_SET) != lasthd ||
|
|
write(fddev, temp, sectorsize) != (ssize_t)sectorsize)
|
|
logmsg(LOG_ERR,
|
|
"error while clearing the dump header: %m");
|
|
}
|
|
xo_close_container_h(xostdout, "crashdump");
|
|
xo_finish_h(xostdout);
|
|
free(dumpkey);
|
|
free(temp);
|
|
close(fddev);
|
|
return;
|
|
|
|
closeall:
|
|
fclose(core);
|
|
|
|
closefd:
|
|
free(dumpkey);
|
|
free(temp);
|
|
close(fddev);
|
|
}
|
|
|
|
/* Prepend "/dev/" to any arguments that don't already have it */
|
|
static char **
|
|
devify(int argc, char **argv)
|
|
{
|
|
char **devs;
|
|
int i, l;
|
|
|
|
devs = malloc(argc * sizeof(*argv));
|
|
if (devs == NULL) {
|
|
logmsg(LOG_ERR, "malloc(): %m");
|
|
exit(1);
|
|
}
|
|
for (i = 0; i < argc; i++) {
|
|
if (strncmp(argv[i], _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
|
|
devs[i] = strdup(argv[i]);
|
|
else {
|
|
char *fullpath;
|
|
|
|
fullpath = malloc(PATH_MAX);
|
|
if (fullpath == NULL) {
|
|
logmsg(LOG_ERR, "malloc(): %m");
|
|
exit(1);
|
|
}
|
|
l = snprintf(fullpath, PATH_MAX, "%s%s", _PATH_DEV,
|
|
argv[i]);
|
|
if (l < 0) {
|
|
logmsg(LOG_ERR, "snprintf(): %m");
|
|
exit(1);
|
|
} else if (l >= PATH_MAX) {
|
|
logmsg(LOG_ERR, "device name too long");
|
|
exit(1);
|
|
}
|
|
devs[i] = fullpath;
|
|
}
|
|
}
|
|
return (devs);
|
|
}
|
|
|
|
static char **
|
|
enum_dumpdevs(int *argcp)
|
|
{
|
|
struct fstab *fsp;
|
|
char **argv;
|
|
int argc, n;
|
|
|
|
/*
|
|
* We cannot use getfsent(3) in capability mode, so we must
|
|
* scan /etc/fstab and build up a list of candidate devices
|
|
* before proceeding.
|
|
*/
|
|
argc = 0;
|
|
n = 8;
|
|
argv = malloc(n * sizeof(*argv));
|
|
if (argv == NULL) {
|
|
logmsg(LOG_ERR, "malloc(): %m");
|
|
exit(1);
|
|
}
|
|
for (;;) {
|
|
fsp = getfsent();
|
|
if (fsp == NULL)
|
|
break;
|
|
if (strcmp(fsp->fs_vfstype, "swap") != 0 &&
|
|
strcmp(fsp->fs_vfstype, "dump") != 0)
|
|
continue;
|
|
if (argc >= n) {
|
|
n *= 2;
|
|
argv = realloc(argv, n * sizeof(*argv));
|
|
if (argv == NULL) {
|
|
logmsg(LOG_ERR, "realloc(): %m");
|
|
exit(1);
|
|
}
|
|
}
|
|
argv[argc] = strdup(fsp->fs_spec);
|
|
if (argv[argc] == NULL) {
|
|
logmsg(LOG_ERR, "strdup(): %m");
|
|
exit(1);
|
|
}
|
|
argc++;
|
|
}
|
|
*argcp = argc;
|
|
return (argv);
|
|
}
|
|
|
|
static void
|
|
init_caps(int argc, char **argv)
|
|
{
|
|
cap_rights_t rights;
|
|
cap_channel_t *capcas;
|
|
|
|
capcas = cap_init();
|
|
if (capcas == NULL) {
|
|
logmsg(LOG_ERR, "cap_init(): %m");
|
|
exit(1);
|
|
}
|
|
/*
|
|
* The fileargs capability does not currently provide a way to limit
|
|
* ioctls.
|
|
*/
|
|
(void)cap_rights_init(&rights, CAP_PREAD, CAP_WRITE, CAP_IOCTL);
|
|
capfa = fileargs_init(argc, argv, checkfor || keep ? O_RDONLY : O_RDWR,
|
|
0, &rights, FA_OPEN);
|
|
if (capfa == NULL) {
|
|
logmsg(LOG_ERR, "fileargs_init(): %m");
|
|
exit(1);
|
|
}
|
|
caph_cache_catpages();
|
|
caph_cache_tzdata();
|
|
if (caph_enter_casper() != 0) {
|
|
logmsg(LOG_ERR, "caph_enter_casper(): %m");
|
|
exit(1);
|
|
}
|
|
capsyslog = cap_service_open(capcas, "system.syslog");
|
|
if (capsyslog == NULL) {
|
|
logmsg(LOG_ERR, "cap_service_open(system.syslog): %m");
|
|
exit(1);
|
|
}
|
|
cap_close(capcas);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
xo_error("%s\n%s\n%s\n",
|
|
"usage: savecore -c [-v] [device ...]",
|
|
" savecore -C [-v] [device ...]",
|
|
" savecore [-fkvz] [-m maxdumps] [directory [device ...]]");
|
|
exit(1);
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
cap_rights_t rights;
|
|
const char *savedir;
|
|
char **devs;
|
|
int i, ch, error, savedirfd;
|
|
|
|
checkfor = compress = clear = force = keep = false;
|
|
verbose = 0;
|
|
nfound = nsaved = nerr = 0;
|
|
savedir = ".";
|
|
|
|
openlog("savecore", LOG_PERROR, LOG_DAEMON);
|
|
signal(SIGINFO, infohandler);
|
|
|
|
argc = xo_parse_args(argc, argv);
|
|
if (argc < 0)
|
|
exit(1);
|
|
|
|
while ((ch = getopt(argc, argv, "Ccfkm:uvz")) != -1)
|
|
switch(ch) {
|
|
case 'C':
|
|
checkfor = true;
|
|
break;
|
|
case 'c':
|
|
clear = true;
|
|
break;
|
|
case 'f':
|
|
force = true;
|
|
break;
|
|
case 'k':
|
|
keep = true;
|
|
break;
|
|
case 'm':
|
|
maxdumps = atoi(optarg);
|
|
if (maxdumps <= 0) {
|
|
logmsg(LOG_ERR, "Invalid maxdump value");
|
|
exit(1);
|
|
}
|
|
break;
|
|
case 'u':
|
|
uncompress = true;
|
|
break;
|
|
case 'v':
|
|
verbose++;
|
|
break;
|
|
case 'z':
|
|
compress = true;
|
|
break;
|
|
case '?':
|
|
default:
|
|
usage();
|
|
}
|
|
if (checkfor && (clear || force || keep))
|
|
usage();
|
|
if (clear && (compress || keep))
|
|
usage();
|
|
if (maxdumps > 0 && (checkfor || clear))
|
|
usage();
|
|
if (compress && uncompress)
|
|
usage();
|
|
argc -= optind;
|
|
argv += optind;
|
|
if (argc >= 1 && !checkfor && !clear) {
|
|
error = chdir(argv[0]);
|
|
if (error) {
|
|
logmsg(LOG_ERR, "chdir(%s): %m", argv[0]);
|
|
exit(1);
|
|
}
|
|
savedir = argv[0];
|
|
argc--;
|
|
argv++;
|
|
}
|
|
if (argc == 0)
|
|
devs = enum_dumpdevs(&argc);
|
|
else
|
|
devs = devify(argc, argv);
|
|
|
|
savedirfd = open(savedir, O_RDONLY | O_DIRECTORY);
|
|
if (savedirfd < 0) {
|
|
logmsg(LOG_ERR, "open(%s): %m", savedir);
|
|
exit(1);
|
|
}
|
|
(void)cap_rights_init(&rights, CAP_CREATE, CAP_FCNTL, CAP_FSTATAT,
|
|
CAP_FSTATFS, CAP_PREAD, CAP_SYMLINKAT, CAP_FTRUNCATE, CAP_UNLINKAT,
|
|
CAP_WRITE);
|
|
if (caph_rights_limit(savedirfd, &rights) < 0) {
|
|
logmsg(LOG_ERR, "cap_rights_limit(): %m");
|
|
exit(1);
|
|
}
|
|
|
|
/* Enter capability mode. */
|
|
init_caps(argc, devs);
|
|
|
|
for (i = 0; i < argc; i++)
|
|
DoFile(savedir, savedirfd, devs[i]);
|
|
|
|
if (nfound == 0) {
|
|
if (checkfor) {
|
|
if (verbose)
|
|
printf("No dump exists\n");
|
|
exit(1);
|
|
}
|
|
if (verbose)
|
|
logmsg(LOG_WARNING, "no dumps found");
|
|
} else if (nsaved == 0) {
|
|
if (nerr != 0) {
|
|
if (verbose)
|
|
logmsg(LOG_WARNING,
|
|
"unsaved dumps found but not saved");
|
|
exit(1);
|
|
} else if (verbose)
|
|
logmsg(LOG_WARNING, "no unsaved dumps found");
|
|
} else if (verbose) {
|
|
logmsg(LOG_NOTICE, "%d cores saved in %s\n", nsaved, savedir);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
infohandler(int sig __unused)
|
|
{
|
|
got_siginfo = 1;
|
|
}
|