Archive for 6th December 2007

Supervising forking processes


quest /tmp# cat test.c
#include <sys/types.h>

#include <stdlib.h>
#include <unistd.h>

int
main (int   argc,
      char *argv[])
{
        pid_t pid;

        pid = fork ();
        if (pid > 0)
                exit (0);

        pid = fork ();
        if (pid > 0)
                exit (0);

        pause ();
        exit (0);
}
quest /tmp# gcc -Wall -g -O0 -o test test.c

quest /tmp# cat /etc/event.d/test
wait for daemon
exec /tmp/test

quest /tmp# start test
test (#0) goal changed from stop to start
test (#0) state changed from waiting to starting
event_new: Pending starting event
Handling starting event
event_finished: Finished starting event
test (#0) state changed from starting to pre-start
test (#0) state changed from pre-start to spawned
process_spawn: Spawned main process 6380 for test (#0)
Active test (#0) main process (6380)
test (#0) main process (6380) forked new child 6381
test (#0) main process (6381) forked new child 6382
test (#0) state changed from spawned to post-start
test (#0) state changed from post-start to running
event_new: Pending started event
Handling started event
event_finished: Finished started event