I'm trying to use PHP to trigger a bash script that should never stop running. It's not just that the command needs to run and I don't need to wait for output, it needs to continue running after PHP is finished. This has worked other times (and the question has been asked already), the difference seems to be my bash script has a trap for when it's closed.
Here is my bash script:
#!/bin/bash
set -e
WAIT=5
FILE_LOCK="$1"
echo "Daemon started (PID $$)..."
echo "$$" > "$FILE_LOCK"
trap cleanup 0 1 2 3 6 15
cleanup()
{
echo "Caught signal..."
rm -rf "$FILE_LOCK"
exit 1
}
while true; do
# do things
sleep "$WAIT"
done
And here is my PHP:
$command = '/path/to/script.sh /tmp/script.lock >> /tmp/script.log 2>&1 &';
$lastLine = exec($command, $output, $returnVal);
I see the script run, the lock file get created, then it exits, and the trap removes the lock file. In my /tmp/script.log
I see:
Daemon started (PID 55963)...
Caught signal...
What's odd is that this only happens when running the PHP via Apache. From command line it keeps running as expected.
The signal on the trap that's being caught is 0
.
I've tried wrapping my command in a bash environment, like $command = '/bin/bash -c "' . addslashes($command) . '"';
, also tried adding nohup
to the beginning. Nothing seems to be working. Is this possible to do for a never ending script?