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Re: Testing <>

by Corion (Pope)
on Oct 03, 2011 at 15:31 UTC ( #929363=note: print w/ replies, xml ) Need Help??

in reply to Testing <>

STDIN is always there.

Maybe you want to detect instead of whether your script is supposed to get interactive input or input piped from a file, or another program?

if( -t and !@ARGV) { die "Need a file or stream on standard input"; }; while (<>) { ... };
>perl -w Need a file or stream on standard input at line 2. >perl -w >perl -w <

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Re^2: Testing <>
by Anonymous Monk on Oct 03, 2011 at 15:49 UTC
    Thanks Corion.

    That's the simple solution I knew had to be there. I didn't know you could use -t in that context. Oh well live and yearn.

    Thanks again

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