testing help and running program 1

[nuser33]

I need assistance with a script. I've tried to my wits end
to search but found no document helpful. I'm trying to set
a script to check and see if a program on a system and if
it is, to use it.

if $PROGRAM

then

exec $PROGRAM

else

echo $PROGRAM not found

 

[PHV]

Depending on the shell you're playing with take a look at type, which or whence in the man pages.

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244

 

[nuser33]

sorry I was using the bash shell. And I did type "man if" even in ksh and found nothing helpful

 

[motoslide]

Try this:
if [ -x FILENAME ]
then
./FILENAME
else
echo "FILENAME not executable"
fi

 

[PHV]

Anyway, as you use the exec builtin:
exec $PROGRAM
echo $PROGRAM not found

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244

 

[perda04]

You could check certain directories that might not be in your $PATH first, then look at 'whereis', 'type' or the other variants listed above.

if [ -x /sbin/swapadd ] ; then
SWAPADD=/sbin/swapadd
else
SWAPADD=`which swapadd`
fi