optional limits

1 files changed, 5 insertions, 5 deletions

diff --git a/check_mem b/check_mem
index e33cdb0..2c3321d 100755
--- a/check_mem
+++ b/check_mem
@@ -43,24 +43,24 @@ sub parse_thresholds($) {
     my $arg = shift;
 
     if ($arg) {
-        if ($arg =~ m/([-:@~0-9]+),([-:@~0-9]+),([-:@~0-9]+),([-:@~0-9]+)/) {
+        if ($arg =~ m/^([-:@~0-9]*),([-:@~0-9]*),([-:@~0-9]*),([-:@~0-9]*)$/) {
             return ($1, $2, $3, $4);
         }
 
-        if ($arg =~ m/([-:@~0-9]+),([-:@~0-9]+),([-:@~0-9]+)/) {
+        if ($arg =~ m/^([-:@~0-9]*),([-:@~0-9]*),([-:@~0-9]*)$/) {
             return ($1, $2, $3, $3);
         }
 
-        if ($arg =~ m/([-:@~0-9]+),([-:@~0-9]+)/) {
+        if ($arg =~ m/^([-:@~0-9]*),([-:@~0-9]*)$/) {
             return ($1, $2, $2, $2);
         }
 
-        if ($arg =~ m/([-:@~0-9]+)/) {
+        if ($arg =~ m/^([-:@~0-9]*)$/) {
             return ($1, $1, $1, $1);
         }
     }
 
-    return ();
+    return undef;
 }
 
 sub get_mem($$) {