From fc34637b27eb961e574bd7726016b0f77879087d Mon Sep 17 00:00:00 2001
From: graehl <graehl@ec762483-ff6d-05da-a07a-a48fb63a330f>
Date: Mon, 28 Jun 2010 18:39:46 +0000
Subject: shell escape empty arg

git-svn-id: https://ws10smt.googlecode.com/svn/trunk@41 ec762483-ff6d-05da-a07a-a48fb63a330f
---
 vest/parallelize.pl | 1 +
 1 file changed, 1 insertion(+)

(limited to 'vest')

diff --git a/vest/parallelize.pl b/vest/parallelize.pl
index 2fa318de..9d3f61c4 100755
--- a/vest/parallelize.pl
+++ b/vest/parallelize.pl
@@ -54,6 +54,7 @@ my $shell_escape_in_quote=qr.[\\"\$`!].;
 sub escape_shell {
     my ($arg)=@_;
     return undef unless defined $arg;
+    return '""' unless $arg;
     if ($arg =~ /$is_shell_special/) {
         $arg =~ s/($shell_escape_in_quote)/\\$1/g;
         return "\"$arg\"";
-- 
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