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Re: Re: Line Numbers

by BazB (Priest)
on Oct 17, 2003 at 21:27 UTC ( #300174=note: print w/ replies, xml ) Need Help??


in reply to Re: Line Numbers
in thread Line Numbers

Actually $0 is the currently executing program, which varies system to system. See perlvar for more detail.

On Solaris 8, it's likely to be something like /usr/bin/perl /path/to/perl/script, not at all like the filename given by warn or die.
On Linux (or at least this Linux box) it is the script name.

Update: Correction; after re-reading perlvar myself, it states "$0...Contains the name of the file containing the Perl script being executed".
However, my comment about it varying OS to OS stands.

Update 2: I am an idiot. I've double checked, following vek's post (++); he's quite right. $0 does exactly as advertised.
All I need to do now is remember where I saw a script reported as I originally and incorrectly reported - ps probably. *Sigh*


If the information in this post is inaccurate, or just plain wrong, don't just downvote - please post explaining what's wrong.
That way everyone learns.


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Re: Re: Re: Line Numbers
by vek (Prior) on Oct 18, 2003 at 20:29 UTC

    Actually on Solaris 8 it's just /path/to/perl/script.

    #!/usr/bin/perl print $0, "\n";

    Prints /path/to/perl/script on Solaris 6, 7, 8, 9 - I just ssh'd into work to test it out :-)

    -- vek --

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