X-Git-Url: https://git.adam-barratt.org.uk/?a=blobdiff_plain;f=dsa-nagios-checks%2Fchecks%2Fdsa-check-libs;h=2dc0f159e60bc25892914021fd69c4c364370def;hb=b3923761df2779305961f11dc4e953dc31624f00;hp=77707d9cd5b66262b0c1547b23e5805668e6e562;hpb=02c5110489125ee137158e757b81814eb8186b28;p=mirror%2Fdsa-nagios.git

diff --git a/dsa-nagios-checks/checks/dsa-check-libs b/dsa-nagios-checks/checks/dsa-check-libs
index 77707d9..2dc0f15 100755
--- a/dsa-nagios-checks/checks/dsa-check-libs
+++ b/dsa-nagios-checks/checks/dsa-check-libs
@@ -30,7 +30,7 @@ $ENV{'PATH'} = '/bin:/sbin:/usr/bin:/usr/sbin';
 delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};
 
 my $LSOF = '/usr/bin/lsof -F0';
-my $VERSION = '0.2012042101';
+my $VERSION = '0.2015012901';
 
 # nagios exit codes
 my $OK = 0;
@@ -48,19 +48,37 @@ sub dief {
 	exit $UNKNOWN;
 }
 
+sub convert_time {
+	my $in = shift;
+	my ($ticks, $unit) = ($in =~ /^(\d+)([smhdw]?)$/);
+
+	if ($unit eq 's' || $unit eq '') { }
+	elsif ($unit eq 'm') { $ticks *= 60; }
+	elsif ($unit eq 'h') { $ticks *= 60*60; }
+	elsif ($unit eq 'd') { $ticks *= 60*60*24; }
+	elsif ($unit eq 'w') { $ticks *= 60*60*24*7; }
+	else { die "Invalid unit '$unit' in '$in'\n" }
+	return $ticks;
+}
+
+
 if (!GetOptions (
-	'--help'	=> \$params->{'help'},
-	'--version'	=> \$params->{'version'},
-	'--quiet'       => \$params->{'quiet'},
-	'--verbose'	=> \$params->{'verbose'},
-	'--config=s'	=> \$params->{'config'},
+	'--help'			=> \$params->{'help'},
+	'--version'			=> \$params->{'version'},
+	'--quiet'			=> \$params->{'quiet'},
+	'--ignore-pid-namespaces'	=> \$params->{'ignore_pid_namespaces'},
+	'--verbose'			=> \$params->{'verbose'},
+	'--ignore-younger=s'		=> \$params->{'ignore_younger'},
+	'-v'				=> \$params->{'verbose'},
+	'--config=s'			=> \$params->{'config'},
 	)) {
-	dief ("$PROGRAM_NAME: Usage: $PROGRAM_NAME [--help|--version] [--verbose] [--quiet] [--config=<CONFIGFILE>]\n");
+	dief ("$PROGRAM_NAME: Usage: $PROGRAM_NAME [--help|--version] [--ignore-pid-namespaces] [--verbose] [--quiet] [--config=<CONFIGFILE>]\n");
 };
 if ($params->{'help'}) {
-	print "$PROGRAM_NAME: Usage: $PROGRAM_NAME [--help|--version] [--verbose] [--quiet] [--config=<CONFIGFILE>]\n";
+	print "$PROGRAM_NAME: Usage: $PROGRAM_NAME [--help|--version] [--ignore-pid-namespaces] [--verbose] [--quiet] [--config=<CONFIGFILE>]\n";
 	print "Reports processes that are linked against libraries that no longer exist.\n";
 	print "The optional config file can specify ignore rules - see the sample config file.\n";
+	print "Can optionally ignore processes from other PID namespaces.\n";
 	exit (0);
 };
 if ($params->{'version'}) {
@@ -103,7 +121,6 @@ if (! exists $config->{'ignorelist'}) {
 	dief("Config->ignorelist is not an array!\n");
 }
 
-
 my %processes;
 
 sub getPIDs($$) {
@@ -138,11 +155,37 @@ sub inVserver() {
 	close F;
 	return 0;
 }
+sub getYoungProcesses() {
+	my $ignore_hash = {};
+	if (defined $params->{'ignore_younger'}) {
+		eval "use Proc::ProcessTable; 1" or die "We need Proc::ProcessTable to use --ignore-younger.\n";
+		my $min_age = convert_time($params->{'ignore_younger'});
+		my $cutoff = time() - $min_age;
+
+		my $process_table = new Proc::ProcessTable(enable_ttys => 0);
+		for my $p ( @{$process_table->table} ){
+			$ignore_hash->{$p->pid} = 1 if $p->start > $cutoff;
+		}
+	}
+	return $ignore_hash;
+}
+
+
+my $IGNORE_YOUNG_PROCESSES = getYoungProcesses();
+
+
+
 
 my $INVSERVER = inVserver();
 
+my $PID_NS_SUPPORT = (-f '/proc/self/ns/pid');
+my $PID_NS;
+if ($PID_NS_SUPPORT and $params->{'ignore_pid_namespaces'}) {
+	$PID_NS = readlink('/proc/self/ns/pid');
+}
+
 print STDERR "Running $LSOF -n\n" if $params->{'verbose'};
-open (LSOF, "$LSOF -n|") or dief ("Cannot run $LSOF -n: $!\n");
+open (LSOF, "$LSOF -n 2>/dev/null|") or dief ("Cannot run $LSOF -n: $!\n");
 my @lsof=<LSOF>;
 close LSOF;
 if ($CHILD_ERROR) { # program failed
@@ -155,10 +198,15 @@ LINE: for my $line (@lsof)  {
 		my %fields = map { m/^(.)(.*)$/ ; $1 => $2 } grep { defined $_  and length $_ >1} split /\0/, $line;
 		$process = $fields{c};
 		$pid     = $fields{p};
-		$user    = $fields{L};
+		$user    = $fields{L} || '<unknown>';
 		next;
 	}
 
+	if ($PID_NS_SUPPORT and $params->{'ignore_pid_namespaces'}) {
+		my $pidns = readlink('/proc/'.$pid.'/ns/pid');
+		next if (defined $pidns and $PID_NS ne $pidns);
+	}
+
 	unless ( $line =~ /^f/ ) {
 		dief("UNKNOWN strange line read from lsof\n");
 		# don't print it because it contains NULL characters...
@@ -170,12 +218,23 @@ LINE: for my $line (@lsof)  {
 	my $inode = $fields{i};
 	my $path  = $fields{n};
 	if ($path =~ m/\.dpkg-/ || $path =~ m/\(deleted\)/ || $path =~ /path inode=/ || $path =~ m#/\.nfs# || $fd eq 'DEL') {
+		my $deleted_in_path = ($path =~ m/\(deleted\)/ || $path =~ m/\.nfs/);
+		next if ($deleted_in_path && $fd =~ /^[0-9]*$/); # Ignore deleted files that are open via normal file handles.
+		next if ($deleted_in_path && $fd eq 'cwd'); # Ignore deleted directories that we happen to be in.
+
 		$path =~ s/^\(deleted\)//; # in some cases "(deleted)" is at the beginning of the string
 		for my $i (@{$config->{'ignorelist'}}) {
 			my $ignore = eval($i);
 			next LINE if $ignore;
 		}
 		next if ($INVSERVER && ($process eq 'init') && ($pid == 1) && ($user eq 'root'));
+		if (exists $IGNORE_YOUNG_PROCESSES->{$pid}) {
+			if ( $params->{'verbose'} ) {
+				print STDERR "ignoring young $process($pid) because of [$path]:\n";
+				print STDERR $line;
+			}
+			next LINE
+		}
 		if ( $params->{'verbose'} ) {
 			print STDERR "adding $process($pid) because of [$path]:\n";
 			print STDERR $line;