On Wed, Apr 16, 2008 at 8:44 AM, Patrick O'Callaghan <pocallaghan@xxxxxxxxx> wrote:
Duh, yes. The OP wants to know if his script is being executed from
On Wed, 2008-04-16 at 10:41 -0400, Bill Davidsen wrote:
> 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
'vi'. That's one way to do it. You're right about the permissions of
course, my bad, but using $PPID doesn't change that in the script.
Here's a better one:
ps -p $PPID -o comm=
That's GREAT! It's exactly what I need.... and bonus points for it working on other platforms too ;-)
Thank you :-)
