topic HP forward mail function in Operating System - HP-UX

HP forward mail function

Barbara Kramer — Mon, 12 Jun 2006 05:46:54 GMT

Hi,
I wrote a script for mail forwarding. Now I need a fuctionality like lockfile (linux) for HPUX. That function waits until one process is done, before another one can start.
Does anyone have any idea?
Thanks for any help
Barbara

Re: HP forward mail function

spex — Mon, 12 Jun 2006 08:41:13 GMT

Barbara,

There are a few ways to accomplish what you want. Depending on how your script is written, you may be able to take advantage of the 'wait' command. 'wait' waits for background processes (executed with '&') to complete before continuing execution.

For example:

cmd1 &
cmd2 &
wait
cmd3

'cmd1' and 'cmd2' are run in parallel. 'cmd3' won't be executed until 'cmd1' and 'cmd2' have completed.

Or you could simulate a lockfile by having the first process create a temp file, and blocking execution of the second process as long as that lockfile exists.

PCS

Re: HP forward mail function

lawrenzo_1 — Mon, 12 Jun 2006 08:53:34 GMT

here is a little something I use to ensure only one sessionis running

# check to ensure there is only one user running this script:

MYPID=$$
print $MYPID > /tmp/pid.lck

if [[ -f /tmp/pid.lck ]]
then
exit 1
else
continue
fi

then last command of script rm $MYPID

Re: HP forward mail function

Barbara Kramer — Mon, 12 Jun 2006 09:03:33 GMT

Hi,
the skript worked great !! thanks so much
smiles
Barbara

Re: HP forward mail function

Barbara Kramer — Mon, 12 Jun 2006 09:06:22 GMT

Just used the solution provided. Thanks again