added some comments

[spider.git] / perl / watchdbg

diff --git a/perl/watchdbg b/perl/watchdbg
index 7975529655809ac79b1e75447fb827f193f9c86f..dec397091dba07d826dbc7e7eb887c8a0a98d0ca 100755 (executable)
--- a/perl/watchdbg
+++ b/perl/watchdbg
@@ -6,6 +6,7 @@
 # examples:-
 # 
 #   watchdbg g1tlh       # watch everything g1tlh does
+#   watchdbg 2 PCPROT       # watch all PCPROT messages + up to 2 lines before
 #   watchdbg gb7baa gb7djk   # watch the conversation between BAA and DJK 
 #
 
@@ -31,7 +32,8 @@ use strict;
 my $fp = DXLog::new('debug', 'dat', 'd');
 my @today = Julian::unixtoj(time()); 
 my $fh = $fp->open(@today) or die $!; 
-my $nolines = shift if $ARGV[0] =~ /^\d+$/ || 1;
+my $nolines = 1;
+$nolines = shift if $ARGV[0] =~ /^\d+$/;
 my $exp = join '|', @ARGV;
 my @prev;