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/*
Copyright (C) 2009 Jiri Moskovcak (jmoskovc@redhat.com)
Copyright (C) 2009 RedHat inc.
This program 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; either version 2 of the License, or
(at your option) any later version.
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; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "CrashWatcher.h"
#include <unistd.h>
#include <iostream>
#include <climits>
#include <cstdlib>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <cstring>
#include <csignal>
void terminate(int signal)
{
exit(0);
}
gboolean CCrashWatcher::handle_event_cb(GIOChannel *gio, GIOCondition condition, gpointer daemon){
GIOError err;
char buf[INOTIFY_BUFF_SIZE];
gsize len;
int i = 0;
err = g_io_channel_read (gio, buf, INOTIFY_BUFF_SIZE, &len);
if (err != G_IO_ERROR_NONE) {
g_warning ("Error reading inotify fd: %d\n", err);
return FALSE;
}
/* reconstruct each event and send to the user's callback */
while (i < len) {
const char *name;
struct inotify_event *event;
event = (struct inotify_event *) &buf[i];
if (event->len)
name = &buf[i] + sizeof (struct inotify_event);
i += sizeof (struct inotify_event) + event->len;
#ifdef DEBUG
std::cout << "Created file: " << name << std::endl;
#endif /*DEBUG*/
CCrashWatcher *cc = (CCrashWatcher*)daemon;
CMiddleWare::crash_info_t crashinfo;
if(cc->m_pMW->SaveDebugDump(std::string(DEBUG_DUMPS_DIR) + "/" + name, crashinfo))
{
/* send message to dbus */
cc->m_pDbusServer->Crash(crashinfo.m_sPackage);
}
}
return TRUE;
}
CCrashWatcher::CCrashWatcher(const std::string& pPath)
{
int watch = 0;
m_sTarget = pPath;
// middleware object
m_pMW = new CMiddleWare(PLUGINS_CONF_DIR,PLUGINS_LIB_DIR, std::string(CONF_DIR) + "/CrashCatcher.conf");
m_nMainloop = g_main_loop_new(NULL,FALSE);
/* register on dbus */
DBus::Glib::BusDispatcher *dispatcher;
dispatcher = new DBus::Glib::BusDispatcher();
dispatcher->attach(NULL);
DBus::default_dispatcher = dispatcher;
DBus::Connection conn = DBus::Connection::SystemBus();
m_pDbusServer = new CDBusServer(conn,CC_DBUS_PATH);
conn.request_name(CC_DBUS_NAME);
if((m_nFd = inotify_init()) == -1){
throw std::string("Init Failed");
//std::cerr << "Init Failed" << std::endl;
exit(-1);
}
if((watch = inotify_add_watch(m_nFd, pPath.c_str(), IN_CREATE)) == -1){
throw std::string("Add watch failed");
}
m_nGio = g_io_channel_unix_new(m_nFd);
}
CCrashWatcher::~CCrashWatcher()
{
//delete dispatcher, connection, etc..
}
void CCrashWatcher::Lock()
{
int lfp = open("crashcatcher.lock",O_RDWR|O_CREAT,0640);
if (lfp < 0)
throw std::string("CCrashWatcher.cpp:can not open lock file");
if (lockf(lfp,F_TLOCK,0) < 0)
throw std::string("CCrashWatcher.cpp:Lock:cannot create lock on lockfile");
/* only first instance continues */
//sprintf(str,"%d\n",getpid());
//write(lfp,str,strlen(str)); /* record pid to lockfile */
}
void CCrashWatcher::StartWatch()
{
char *buff = new char[INOTIFY_BUFF_SIZE];
int len = 0;
int i = 0;
char action[FILENAME_MAX];
struct inotify_event *pevent;
//run forever
while(1){
i = 0;
len = read(m_nFd,buff,INOTIFY_BUFF_SIZE);
while(i < len){
pevent = (struct inotify_event *)&buff[i];
if (pevent->len)
std::strcpy(action, pevent->name);
else
std::strcpy(action, m_sTarget.c_str());
i += sizeof(struct inotify_event) + pevent->len;
#ifdef DEBUG
std::cout << "Created file: " << action << std::endl;
#endif /*DEBUG*/
}
}
delete[] buff;
}
/* daemon loop with glib */
void CCrashWatcher::GStartWatch()
{
char *buff = new char[INOTIFY_BUFF_SIZE];
int len = 0;
int i = 0;
char action[FILENAME_MAX];
struct inotify_event *pevent;
g_io_add_watch (m_nGio, G_IO_IN, handle_event_cb, this);
//enter the event loop
g_main_run (m_nMainloop);
delete[] buff;
}
void CCrashWatcher::RegisterSignals()
{
signal(SIGTERM, terminate);
}
void CCrashWatcher::Daemonize()
{
#ifdef DEBUG
std::cout << "Daemonize" << std::endl;
#endif
// forking to background
pid_t pid = fork();
if (pid < 0)
{
throw "CCrashWatcher.cpp:Daemonize:Fork error";
}
/* parent exits */
if (pid > 0) _exit(0);
/* child (daemon) continues */
pid_t sid = setsid();
if(sid == -1){
throw "CCrashWatcher.cpp:Daemonize:setsid failed";
}
Lock();
GStartWatch();
}
void CCrashWatcher::Run()
{
#ifdef DEBUG
std::cout << "Run" << std::endl;
#endif
Lock();
GStartWatch();
}
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