Re: Altering Behavior of a Script

On *NIX, the environment variable $- will contain 'i' iff the shell was invoked interactively i.e.

if ($ENV{'-'} =~ 'i') {
    # interactive invocation
} else {
    # non-interactive e.g. cron, invocation
}
[download]

A user level that continues to overstate my experience :-))

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Re^2: Altering Behavior of a Script by bichonfrise74 (Vicar) on Sep 03, 2009 at 20:44 UTC
I'm on a Linux system, but the script you provided does not seem to be working for me. In fact, if I do this, `perl -e 'print join "\n", keys %ENV';` [download] I do not even see '-', the closest thing that would resemble this is '_'. But if I print the value of '_', it will give me this: /usr/bin/perl	[reply] [d/l]
Re^3: Altering Behavior of a Script by ikegami (Patriarch) on Sep 03, 2009 at 20:52 UTC
Bloodnok is thinking of special `bash` variable `$-`. It is not an environment variable, and it would be useless to a child anyway.	[reply] [d/l] [select]