Proc::Background killing parent process when child dies

[Paul Clements]

Hi,

I have a perl script which spawns processes by use of Proc::Background
and this works fine.

One of the child processes accesses a database and if that database is
down I want as well as the child process to die, I want the parent
process to exit.

Any clues on how to do this would be very much appreciated

Regards

Paul

 

[thumb_42]

Hi,

I have a perl script which spawns processes by use of Proc::Background
and this works fine.

One of the child processes accesses a database and if that database is
down I want as well as the child process to die, I want the parent
process to exit.

Any clues on how to do this would be very much appreciated

Regards

Paul

I've never used Proc::Background, but in a fork() environment, you can store
the parent process ID to a variable (prior to fork()) and then from the child
send a signal to the parent. kill($PARENT_PID,<whatever_signal>); If you've
got multiple child processes, you'll probably want the parent to tell the
other child procs to exit as well. (just use an event handler in
the %SIG array to do this.)

Jamie

 

[Ben Morrow]

I have a perl script which spawns processes by use of Proc::Background
and this works fine.

One of the child processes accesses a database and if that database is
down I want as well as the child process to die, I want the parent
process to exit.

Any clues on how to do this would be very much appreciated

If you're on a Unix system, catch SIGCHLD and check it against a list
of spawned processes.

Ben