[root@devel3 log]# cat /etc/sudoers
# sudoers file.
# This file MUST be edited with the 'visudo' command as root.
# See the sudoers man page for the details on how to write a sudoers file.

# let apache send HUP to squid
apache ALL=NOPASSWD:/home/www/utility/sendHUP.pl


[root@devel3 log]# ll /home/www/utility/sendHUP.pl
-rwxr-xr-x    1 apache   coders       1114 Mar 10 02:43 /home/www/utility/sendHUP.pl


[root@devel3 log]# cat /home/www/utility/sendHUP.pl
#!/usr/bin/perl -w

# this script need to be run as root, to do this we add an entry to
# /etc/sudoers so that apache can run it (you edit using visudo)
# visudo -f /etc/sudoers
# add this line
# apache ALL=NOPASSWD:/home/www/utility/sendHUP.pl
# call as system('sudo', '/home/www/utility/sendHUP.pl');

(kill HUP, $PROGRAM) or exit 42;
exit 0;