Patrick O'Callaghan wrote:
On Tue, 2008-04-15 at 10:49 -0700, Don Russell wrote:
How can I tell, from a Korn shell script, if the script is running in
a vi sub-shell?
I have a script that has a problem when run from a vi subshell, and
I'd like to check for that condition and just issue an error message.
(I know that's not the solution to the problem, but the thing that
fails is being replaced, so this is a temporary "fix")
Try:
ls -l /proc/`cat /proc/$$/status|grep PPid|cut -f2`/exe
What on Earth are you doing here?
1) unless you have some reason to doubt the value of $PPID, you are just
making this look complex
2) if this is a login shell, you will not have permission to read the
exe symbolic link.
3) you probably just want to see if /proc/$PPIC/cmdline matches vi
and work from there.
poc
--
Bill Davidsen <davidsen@xxxxxxx>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
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