From be879262d3ba37b59f8ece107271c2bc547074fa Mon Sep 17 00:00:00 2001
From: Darold Gilles <gilles@darold.net>
Date: Wed, 23 Jul 2014 17:11:06 +0200
Subject: [PATCH] Fix missing initial move to offset in incremental mode before
 the file change test. Thanks to Herve Werner for the report.

---
 pgbadger | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pgbadger b/pgbadger
index 70ad81d..b83ae0c 100755
--- a/pgbadger
+++ b/pgbadger
@@ -1046,7 +1046,7 @@ my $td = timediff($t1, $t0);
 # Global output filehandle
 my $fh = undef;
 
-if (!$incremental) {
+if (!$incremental && ($#given_log_files >= 0) ) {
 
 	&logmsg('LOG', "Ok, generating $extension report...");
 
@@ -2162,8 +2162,12 @@ sub check_file_changed
 	my $CURRENT_DATE = $gyear . sprintf("%02d", $gmon + 1) . sprintf("%02d", $gmday);
 
 	%prefix_vars = ();
+	$lfile->seek($saved_last_line{current_pos} || 0, 0);
+	my $more_lines = 0;
 	while (my $line = <$lfile>) {
 
+		$more_lines++;
+
 		if ($format =~ /syslog/) {
 
 			my @matches = ($line =~ $compiled_prefix);
@@ -2218,6 +2222,11 @@ sub check_file_changed
 	}
 	close($lfile);
 
+	if (!$more_lines) {
+		close($lfile);
+		return 0;
+	}
+
 	return 1;
 }
 
-- 
2.50.1