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/*
* This file is part of evQueue
*
* evQueue 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 3 of the License, or
* (at your option) any later version.
*
* evQueue 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 evQueue. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Thibault Kummer <bob@coldsource.net>
*/
#include <global.h>
#include <tools_ipc.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/wait.h>
pid_t pid = 0;
st_msgbuf msgbuf;
void signal_callback_handler(int signum)
{
if(signum==SIGTERM)
{
// Forward signal to our child
fprintf(stderr,"evqueue_notification_monitor : received SIGTERM, killing task...\n");
if(pid)
kill(pid,SIGKILL);
msgbuf.mtext.tid = 1; // Killed
}
else if(signum==SIGALRM)
{
fprintf(stderr,"evqueue_notification_monitor : task timed out...\n");
if(pid)
kill(pid,SIGKILL);
msgbuf.mtext.tid = 2; // Timed out
}
}
int main(int argc,char ** argv)
{
if(argc<=5)
return -1;
// Catch signals
signal(SIGTERM,signal_callback_handler);
signal(SIGALRM,signal_callback_handler);
// Unblock SIGTERM (blocked by evqueue)
sigset_t signal_mask;
sigemptyset(&signal_mask);
sigaddset(&signal_mask, SIGTERM);
sigprocmask(SIG_UNBLOCK,&signal_mask,0);
// Create message queue
int msgqid = ipc_openq(getenv("EVQUEUE_IPC_QID"));
if(msgqid==-1)
return -1;
int timeout = atoi(argv[2]);
char *cmd_filename = argv[1];
char *wfi_id = argv[3];
char *wfi_errors = argv[4];
char *unix_socket_path = argv[5];
int status;
msgbuf.type = 2;
msgbuf.mtext.pid = getpid();
msgbuf.mtext.tid = 0; // Normal condition
pid = fork();
if(pid==0)
{
const char *working_directory = getenv("EVQUEUE_WORKING_DIRECTORY");
if(working_directory && working_directory[0]!='\0')
{
if(chdir(working_directory)!=0)
{
fprintf(stderr,"Unable to change directory to %s\n",working_directory);
return -1;
}
}
status = execl(cmd_filename,cmd_filename,wfi_id,wfi_errors,unix_socket_path,(char *)0);
fprintf(stderr,"Unable to execute command '%s'. execv() returned %d\n",cmd_filename,status);
return -1;
}
if(pid<0)
{
fprintf(stderr,"Unable to execute fork\n");
msgbuf.mtext.retcode = -1;
msgbuf.mtext.tid = 3; // Unable to fork
}
else
{
if(timeout>0)
alarm(timeout);
waitpid(pid,&status,0);
if(WIFEXITED(status))
msgbuf.mtext.retcode = WEXITSTATUS(status);
else
msgbuf.mtext.retcode = -1;
}
msgsnd(msgqid,&msgbuf,sizeof(st_msgbuf::mtext),0); // Notify evqueue
return msgbuf.mtext.retcode;
}
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