Beefy Boxes and Bandwidth Generously Provided by pair Networks
go ahead... be a heretic

Re: Using wildcards to open files.

by kennethk (Abbot)
on Oct 25, 2012 at 15:48 UTC ( #1000891=note: print w/ replies, xml ) Need Help??

in reply to Using wildcards to open files.

Do your file names have characters that need escaping or quoting, e.g. $cmd = "perl < '$file'";? Have you actually tested that the code as posted fails in your context? It works for me for some simple test systems.

The simplest solution from my perspective would be to avoid shelling and modify to process multiple files. That will give you access to the actual diagnostics and remove a layer of misdirection.

Update: If you can't modify for whatever reason, you can handle the file opens and piping yourself with something like:

#!/usr/bin/perl -w use strict; my @files = glob("*.msg"); foreach my $file(@files) { open my $in, '<', $file or die "Open fail on $file: $!\n"; my @lines = <$in>; open my $out, '|-', 'perl' or die "Piping fail: $!\n"; print $out @lines; }
Note that making those variables lexical to the loop (my) is significant, and you will likely need to explicitly close the filehandles otherwise. See |- in open or Safe Pipe Opens for some background.

#11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

Comment on Re: Using wildcards to open files.
Select or Download Code

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1000891]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others lurking in the Monastery: (11)
As of 2015-10-13 12:25 GMT
Find Nodes?
    Voting Booth?

    Does Humor Belong in Programming?

    Results (304 votes), past polls