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/*
* Copyright 2007, Intel Corporation
* Copyright 2009, Red Hat Inc.
*
* This file is part of Abrt.
*
* This program file is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program in a file named COPYING; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* Authors:
* Anton Arapov <anton@redhat.com>
* Arjan van de Ven <arjan@linux.intel.com>
*/
#include <assert.h>
#include <syslog.h>
#include <asm/unistd.h> /* __NR_syslog */
#include "abrtlib.h"
#include "DebugDump.h"
#include "ABRTException.h"
#include "CommLayerInner.h"
#include "KerneloopsSysLog.h"
#include "KerneloopsScanner.h"
#include <limits.h>
#define FILENAME_KERNELOOPS "kerneloops"
// TODO: https://fedorahosted.org/abrt/ticket/78
CKerneloopsScanner::CKerneloopsScanner()
{
int cnt_FoundOopses;
/* Scan dmesg, on first call only */
cnt_FoundOopses = ScanDmesg();
if (cnt_FoundOopses > 0)
SaveOopsToDebugDump();
}
void CKerneloopsScanner::Run(const char *pActionDir, const char *pArgs)
{
const char *syslog_file = "/var/log/messages";
map_plugin_settings_t::const_iterator it = m_pSettings.find("SysLogFile");
if (it != m_pSettings.end())
{
syslog_file = it->second.c_str();
}
int cnt_FoundOopses = ScanSysLogFile(syslog_file);
if (cnt_FoundOopses > 0) {
SaveOopsToDebugDump();
/*
* This marker in syslog file prevents us from
* re-parsing old oopses (any oops before it is
* ignored by ScanSysLogFile()). The only problem
* is that we can't be sure here that syslog_file
* is the file where syslog(xxx) stuff ends up.
*/
openlog("abrt", 0, LOG_KERN);
syslog(
LOG_WARNING,
"Kerneloops: Reported %u kernel oopses to Abrt",
cnt_FoundOopses
);
closelog();
}
}
void CKerneloopsScanner::SaveOopsToDebugDump()
{
update_client(_("Creating kernel oops crash reports..."));
int countdown = 16; /* do not report hundreds of oopses */
time_t t = time(NULL);
vector_string_t oopsList = m_pOopsList;
m_pOopsList.clear();
while (!oopsList.empty() && --countdown != 0) {
char path[sizeof(DEBUG_DUMPS_DIR"/kerneloops-%lu-%lu") + 2 * sizeof(long)*3];
sprintf(path, DEBUG_DUMPS_DIR"/kerneloops-%lu-%lu",
(long)t, (long)oopsList.size());
std::string oops = oopsList.back();
const char *first_line = oops.c_str();
char *second_line = (char*)strchr(first_line, '\n'); /* never NULL */
*second_line++ = '\0';
try
{
CDebugDump debugDump;
debugDump.Create(path, 0);
debugDump.SaveText(FILENAME_ANALYZER, "Kerneloops");
debugDump.SaveText(FILENAME_EXECUTABLE, "kernel");
debugDump.SaveText(FILENAME_KERNEL, first_line);
debugDump.SaveText(FILENAME_PACKAGE, "not_applicable");
debugDump.SaveText(FILENAME_KERNELOOPS, second_line);
}
catch (CABRTException& e)
{
throw CABRTException(EXCEP_PLUGIN, "%s: %s", __func__, e.what());
}
oopsList.pop_back();
}
}
int CKerneloopsScanner::ScanDmesg()
{
VERB1 log("Scanning dmesg...");
int cnt_FoundOopses;
char *buffer;
int pagesz = getpagesize();
buffer = (char*)xzalloc(pagesz + 1);
syscall(__NR_syslog, 3, buffer, pagesz);
m_pOopsList.clear();
cnt_FoundOopses = extract_oopses(m_pOopsList, buffer, strlen(buffer));
free(buffer);
return cnt_FoundOopses;
}
int CKerneloopsScanner::ScanSysLogFile(const char *filename)
{
VERB1 log("Scanning syslog...");
char *buffer;
struct stat statb;
int fd;
int cnt_FoundOopses;
ssize_t sz;
fd = open(filename, O_RDONLY);
if (fd < 0)
return 0;
statb.st_size = 0; /* paranoia */
if (fstat(fd, &statb) != 0 || statb.st_size < 1)
return 0;
/*
* in theory there's a race here, since someone could spew
* to /var/log/messages before we read it in... we try to
* deal with it by reading at most 1023 bytes extra. If there's
* more than that.. any oops will be in dmesg anyway.
* Do not try to allocate an absurd amount of memory; ignore
* older log messages because they are unlikely to have
* sufficiently recent data to be useful. 32MB is more
* than enough; it's not worth looping through more log
* if the log is larger than that.
*/
sz = statb.st_size + 1024;
if (statb.st_size > (32*1024*1024 - 1024)) {
xlseek(fd, statb.st_size - (32*1024*1024 - 1024), SEEK_SET);
sz = 32*1024*1024;
}
buffer = (char*)xzalloc(sz);
sz = full_read(fd, buffer, sz);
close(fd);
cnt_FoundOopses = 0;
if (sz > 0) {
m_pOopsList.clear();
cnt_FoundOopses = extract_oopses(m_pOopsList, buffer, sz);
}
free(buffer);
return cnt_FoundOopses;
}
PLUGIN_INFO(ACTION,
CKerneloopsScanner,
"KerneloopsScanner",
"0.0.1",
"Periodically scans for and saves kernel oopses",
"anton@redhat.com",
"http://people.redhat.com/aarapov",
"");
/* For "dumpoops" tool */
extern "C" {
int scan_syslog_file(CKerneloopsScanner *This, const char *filename)
{
return This->ScanSysLogFile(filename);
}
void save_oops_to_debug_dump(CKerneloopsScanner *This)
{
This->SaveOopsToDebugDump();
}
}
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