From: Marius Gavrilescu <marius@ieval.ro>
Date: Wed, 29 Jul 2015 11:29:42 +0000 (+0300)
Subject: Start gruntmaster-exec alarm just before exec
X-Git-Tag: 5999.000_005~10
X-Git-Url: http://git.ieval.ro/?p=gruntmaster-daemon.git;a=commitdiff_plain;h=0418cda23eb73ee9be138d4f8fab977927132007

Start gruntmaster-exec alarm just before exec

This way, a part of the time needed for setup (forking, opening files,
setting limits) no longer counts against the time limit.
---

diff --git a/gruntmaster-exec b/gruntmaster-exec
index b6577f4..fd79d8f 100755
--- a/gruntmaster-exec
+++ b/gruntmaster-exec
@@ -46,7 +46,13 @@ undef $mlimit if @sudo; # sudo wants a lot of address space
 
 my $ret = fork // die 'Cannot fork';
 if ($ret) {
-	my $tle;
+	my ($tle, $child_ready);
+	local $SIG{USR1} = sub { $child_ready = 1 };
+	sleep 3; # Wait for ready signal (SIGUSR1)
+	unless ($child_ready) {
+		kill KILL => $ret;
+		exit !say ERR, "\nNo response from gruntmaster-exec child";
+	}
 	local $SIG{ALRM} = sub {
 		if ($killuser) {
 			system @sudo, 'pkill', '-KILL', '-u', $killuser;
@@ -92,6 +98,7 @@ if ($ret) {
 	print $adj 900;
 	close $adj;
 	unshift @ARGV, @sudo;
+	kill USR1 => getppid; # Tell parent process that we're ready
 	say STDERR "Executing: ", join ' ', map { "'$_'" } @ARGV if $debug;
 	exec @ARGV;
 }
diff --git a/lib/Gruntmaster/Daemon/Format.pm b/lib/Gruntmaster/Daemon/Format.pm
index cd0e47d..0a73611 100644
--- a/lib/Gruntmaster/Daemon/Format.pm
+++ b/lib/Gruntmaster/Daemon/Format.pm
@@ -63,7 +63,7 @@ sub execlist {
 	unlink $er;
 	chomp ($excode, $exmsg); ## no critic (ProhibitParensWithBuiltins)
 	get_logger->trace("Exec result: $excode $exmsg");
-	die [$excode, $exmsg] if $excode > 0; ## no critic (RequireCarping)
+	die [$excode, $exmsg] if $excode; ## no critic (RequireCarping)
 }
 
 sub mkrun{