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comparison headWrapper.pl @ 0:ecca14446e6a

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Uploaded show_beginning tarball.
author devteam
date Tue, 04 Dec 2012 11:05:17 -0500
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-1:000000000000 0:ecca14446e6a
1 #! /usr/bin/perl -w
2
3 use strict;
4 use warnings;
5
6 # a wrapper for head for use in galaxy
7 # headWrapper.pl [filename] [# lines to show] [output]
8
9 die "Check arguments" unless @ARGV == 3;
10 die "Line number must be an integer\n" unless $ARGV[1]=~ m/^\d+$/;
11
12 open (OUT, ">$ARGV[2]") or die "Cannot create $ARGV[2]:$!\n";
13 open (HEAD, "head -n $ARGV[1] $ARGV[0]|") or die "Cannot run head:$!\n";
14 while (<HEAD>) {
15 print OUT;
16 }
17 close OUT;
18 close HEAD;
19