how to use "if not" construction

aoussenko · #1 (**permalink**) 04-21-2009

Hi
I am working in ksh and need to turn the following "if" statement into "if not" :

if psef op | grep -w fps1 >/dev/null
echo fps1 is running.
else
exit 1
fi

I am getting syntax errors no matter what I do, for example :

n079$ if [[ ! psef op | grep -w fps1 | grep -v grep > /dev/null ]]; then
ksh: syntax error: `op' unexpected

any idea? Thakns a lot for help -A

giannicello · #2 (**permalink**) 04-21-2009

Have you tried to do this:

Code:

psef op | grep -w fps1 >/dev/null

rc=$?
if [[ $rc -ne 0 ]]; then
  echo fps1 is not running.
else
  exit 1
fi

aoussenko · #3 (**permalink**) 04-22-2009

Thanks!

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