[olug] am I at the console?

[Sean Kelly]

On Fri, Mar 24, 2006 at 05:44:34PM -0500, thelarsons3 at cox.net wrote:
> Hello,
> 
> I want a shell script to check if it's being run at the console, so it can act differently than it would in a virtual/remote terminal.  Is this possible?  A portable (cross-Unix) solution would be great, but I'll take anything.

On my RHEL AS 4 system, I have an /sbin/consoletype command:

RETURN VALUE
       consoletype when passed no arguments returns

       0      if on virtual terminal

       1      if on serial console

       2      if on a pseudo terminal.

$ /sbin/consoletype >/dev/null ; echo $?
2
# /sbin/consoletype < /dev/tty1 > /dev/null ; echo $?
0

-- 
Sean Kelly         | PGP KeyID: D2E5E296
smkelly at zombie.org | http://www.zombie.org