Stopping httpd causes a process started from perl CGI script to receive SIGTERM
- by Pranav Pal
I am running a shell script from a perl CGI script:
#!/usr/bin/perl
my $command = "./script.sh &";
my $pid = fork();
if (defined($pid) && $pid==0) {
# background process
system( $command );
}
The shell script looks like this:
#!/bin/sh
trap 'echo trapped' 15
tail -f test.log
When I run the CGI script from browser, and then stop httpd using /etc/init.d/httpd stop, the script receives a SIGTERM signal.
I was expecting the script to run as a separate process and not be tied in anyway to httpd. Though I can trap the SIGTERM, I would like to understand why the script is receiving SIGTERM at all.
What wrong am I doing here? I am running RHEL 5.8 and Apache HTTP server 2.4.
Thanks,
Pranav
