[NTLUG:Discuss] Flock file hanging around

[Neil Aggarwal]

Stuart:

Thank you for your help on this.

I am trying to modify the script to notify root if the processes in my
script are still executing after an hour, so I modified my script to this:

#!/bin/bash
LOCKFILE=/var/lock/mylock.lck

(
if [ flock -n -s 200 ]; then
  # Execute commands
  ...
  sleep 5
else
  if [ $(( $(date +%s) - $(date +%s -r $LOCKFILE) )) -gt 3600 ]; then
    sendmail root "Lock file more than 1 hour old";
  fi
fi
) 200>$LOCKFILE

I am getting this error on the if statement around the flock command:
[: too many arguments

I am not sure why it is complaining since the flock command is supposed to
return a value when called with the -n argument.

Any ideas?
Is there a better way to do this?

Thanks,
  Neil

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