Re: Check if running inside script

In reply to: Andrea Venturoli : "Check if running inside script"
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From: Matthew Seaman <matthew_at_FreeBSD.org>
Date: Mon, 08 May 2023 13:12:32 UTC

On 08/05/2023 13:35, Andrea Venturoli wrote:
> Is there a way a shell script of mine can check if running inside 
> sysutils/screen?

Check the shell environment.  I use tmux(1) in preference to screen(1), 
and that sets various environment variables which should provide some clues:

```
lucid-nonsense:~:% env | grep -i tmux
TMUX_PANE=%0
TMUX=/tmp/tmux-1001/default,36946,0
TERM_PROGRAM=tmux
TERM=tmux-256color
```

Hmmm.... actually, screen(1) is installed on my Mac:

```
[misophist]:~:% env| grep -i screen
TERM=screen
TERMCAP=SC|screen|VT 100/ANSI X3.64 virtual terminal:\
```

Looks like what you want is the $TERM environment variable.

	Cheers,

	Matthew