http://qs1969.pair.com?node_id=62560


in reply to Reading a file

Try this: 

#!/usr/bin/perl -w

use strict;

open (FILE, "file.txt") or die "arrrrgh...$!\n";

while (<FILE>) {
    print; 
    # pass to program here
}
close(FILE);

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The reason you can do this is because while will read the file handle one line at a time. I am wondering what you mean by "passing it to another program." Could you just use a subroutine, or are you talking about a seperate utility?

redmist
Silicon Cowboy

Replies are listed 'Best First'.
Re: (redmist) Re: Reading a file
by Ido (Hermit) on Mar 07, 2001 at 00:11 UTC
    Maybe: 
    open OUT,'|program' or die $!;
open IN,'file.txt' or die $!;
#if you don't need to process each line...I don't see why not printing
+ all the lines at once like:
print OUT <IN>;
#but if you must print one line at a time:
while(<IN>){
#do whatever you want with the line.
print OUT $_;
}
close OUT; close IN;

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[d/l]

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