Re: [gentoo-user] MailScanner: caught SIGTERM, aborting

[Stroller]

On 24 May 2009, at 14:37, Jarry wrote:
> ...
> The /etc/init.d/MailScanner script looks so:
> ----------------------------------
> #!/sbin/runscript
> opts="${opts} reload"
> depend() {
>        need net mta
>        use logger dns }
>
> start() {
>        ebegin "Starting MailScanner"
>        /usr/sbin/check_MailScanner >/dev/null
>        RETVAL=$?
>        [ ${RETVAL} -eq 0 ] && touch /var/lock/subsys/MailScanner
>        [ ${RETVAL} -eq 0 ] && rm -f /var/lock/subsys/MailScanner.off
>        eend ${RETVAL}
> }
>
> stop() {
>        ebegin "Stopping MailScanner"
>        killall -15 MailScanner
>        RETVAL=$?
>        [ ${RETVAL} -eq 0 ] && rm -f /var/lock/subsys/MailScanner
>        [ ${RETVAL} -eq 0 ] && touch /var/lock/subsys/MailScanner.off
>        eend ${RETVAL}
> }
> # restart () {} and reload () {} removed
> ----------------------------------


That's the ugliest init.d script ever. It looks like it fell out of  
the ugly tree, hit every branch on the way down and now not even its  
mother could love it. &c &c.

Suggest you follow Mike's advice & rewrite the script based on the  
other examples installed on your system, the ones written by Gentoo  
devs. Unfortunately, if you don't know Bash very well, this may be a  
bit of a mission, but I'm afraid it needs doing.

The script needs to save the process ID of the process that it starts  
when it opens the application, then to stop the app it needs to kill  
that specific PID, calling it by number. It needs to check that the  
commands have worked -  for instance: was it successful when it  
executed `kill $PID`? See Example 6-1 of the Bash Scripting Guide <http://tldp.org/LDP/abs/html/exit-status.html 
 >. See also use of special variable $! in chapter 9 of ABSGuide and  
also <http://www.unix.com/shell-programming-scripting/26377-pid-bash.html 
 >, but as Mike observes start-stop-daemon should take care of that  
for you.

Stroller.