I have a script that tries to make a DB connection using another program and the timeout(2.5min) of the program is to long. I want to add this functionality to the script.
If it takes longer then 5 seconds to connect, kill the process
Else kill the sleep/kill process.
The issue I'm having is how bash reports when a process is killed, that's because the processes are in the same shell just the background. Is there a better way to do this or how can I silence the shell for the kill commands?
DB_CONNECTION_PROGRAM > $CONNECTFILE &
pid=$!
(sleep 5; kill $pid) &
sleep_pid=$!
wait $pid
# If the DB failed to connect after 5 seconds and was killed
status=$? #Kill returns 128+n (fatal error)
if [ $status -gt 128 ]; then
no_connection="ERROR: Timeout while trying to connect to $dbserver"
else # If it connected kill the sleep and any errors collect
kill $sleep_pid
no_connection=`sed -n '/^ERROR:/,$p' $CONNECTFILE`
fi
Answer
There's a GNU coreutils utility called timeout: http://www.gnu.org/s/coreutils/manual/html_node/timeout-invocation.html
If you have it on your platform, you could do:
timeout 5 CONNECT_TO_DB
if [ $? -eq 124 ]; then
# Timeout occurred
else
# No hang
fi