Shell Programming and Scripting

Is this possible? If so it seems like a very easy and short script.I'd like to make a script that will print a friendly message but only if it is on your personal terminal. so the code would look like this:

Code:

#!/bin/csh
if [tty = '/dev/pts/8']; 
then
echo "This is a friendly message :D ";
fi

thats what i have so far. but i keep getting an expressino syntax error. what wrong with this?

For starters, your code looks to be of the Bourne shell family (sh, Ksh, bash, etc.) and not csh. First line should probalby be #!/usr/bin/env bash or something similar.

Secondly, there needs to be whitespace on either side of brackets:

Code:

foo=$(foo_command)
if [ $foo = "bar" ]
then
   echo "true"
fi

Finally, your expression will never evaluate to true because you are comparing a constant (tty) rather than the contents of a variable. You'll need to dig out the current tty and assign it to the variable and then test by causing it to expand -- like above.

ok. this is my updated code:

#!/bin/csh
set var1 = `tty`
if [ $var1 = "/dev/pts/8" ]; then echo "This is a friendly message "; fi

Im still getting a-
if: Expression Syntax.
-error. why is that?

i just want to write a scriptin csh to check if i am in the correct terminal.

Please disregard I realized my answer was incorrect. I wish I could delete my post.

You're getting a syntax error because the if statement you are writing is in bourne/kshell/bash and not csh. I haven't written a csh script since the early 90s, so this is a guess:

Code:

if ( $var1 == "/dev/pts/8" ) then
   echo "message here"
endif