Mercurial > repos > devteam > show_tail
annotate tailWrapper.pl @ 0:8bb4d908a523
Uploaded show_tail tarball.
| author | devteam |
|---|---|
| date | Tue, 04 Dec 2012 11:06:47 -0500 |
| parents | |
| children |
| rev | line source |
|---|---|
| 0 | 1 #! /usr/bin/perl -w |
| 2 | |
| 3 use strict; | |
| 4 use warnings; | |
| 5 | |
| 6 # a wrapper for tail for use in galaxy | |
| 7 # lessWrapper.pl [filename] [# lines to show] [output] | |
| 8 | |
| 9 die "Check arguments" unless @ARGV == 3; | |
| 10 die "Line number should be an integer\n" unless $ARGV[1]=~ m/^\d+$/; | |
| 11 | |
| 12 open (OUT, ">$ARGV[2]") or die "Cannot create $ARGV[2]:$!\n"; | |
| 13 open (TAIL, "tail -n $ARGV[1] $ARGV[0]|") or die "Cannot run tail:$!\n"; | |
| 14 while (<TAIL>) { | |
| 15 print OUT; | |
| 16 } | |
| 17 close OUT; | |
| 18 close TAIL; | |
| 19 |