topic shell script test in Operating System - HP-UX

shell script test

Mark F Johnson — Thu, 11 Jan 2001 22:34:04 GMT

How do you test if a shell script is executing interactively, from a terminal, or from cron?

Re: shell script test

James R. Ferguson — Thu, 11 Jan 2001 23:04:17 GMT

Hi Mark:

[ -t -eq 0 ] will return true (exit status = 0) if the shell is interactive.

...JRF...

Re: shell script test

Dan Hetzel — Fri, 12 Jan 2001 06:35:22 GMT

Hi Mark,

#!/usr/bin/sh
if [ tty >/dev/null 2>&1 ]
then
echo "terminal"
else
echo "not a terminal"
fi

'tty' used alone prints either the terminal name or an error message.Redirecting standard output and standard error removes all messages.

Best regards,

Dan