Sometimes my bash scripts are hanging and hold without clear reason
So they actually can hang for ever ( script process will run until I kill it )
Is it possible to combine in the bash script time out mechanism in order to exit from the program after for example ½ hour?
This Bash-only approach encapsulates all the timeout code inside your script by running a function as a background job to enforce the timeout:
#!/bin/bash
Timeout=1800 # 30 minutes
function timeout_monitor() {
sleep "$Timeout"
kill "$1"
}
# start the timeout monitor in
# background and pass the PID:
timeout_monitor "$$" &
Timeout_monitor_pid=$!
# <your script here>
# kill timeout monitor when terminating:
kill "$Timeout_monitor_pid"
Note that the function will be executed in a separate process. Therefore the PID of the monitored process ($$) must be passed. I left out the usual parameter checking for the sake of brevity.
$! and kill it before terminating the main program. Or use an EXIT handler. Or use Gnu's timeout as rici suggested.If you have Gnu coreutils, you can use the timeout command:
timeout 1800s ./myscript
To check if the timeout occurred check the status code:
timeout 1800s ./myscript
if (($? == 124)); then
echo "./myscript timed out after 30 minutes" >>/path/to/logfile
exit 124
fi
