block CHLD signals on startup

in order to prevent glib-threading segfaults (mga#10289), just block the
CHLD signal during the window where glib create threads behind our back
(RT-120951)

2 files changed, 7 insertions, 1 deletions

diff --git a/NEWS b/NEWS
index 9115857e..90c7319f 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,6 @@
+- block CHLD signals on startup in order to prevent glib-threading segfaults
+  (mga#10289)
+
 Version 3.7.1 - 22 January 2014, Thierry Vignaud
 
 - better fix for mga#12280 while fixing mgaapplet exiting reported by
diff --git a/mgaapplet b/mgaapplet
index 8d4deaa2..27a6925d 100755
--- a/mgaapplet
+++ b/mgaapplet
@@ -22,7 +22,7 @@
 ################################################################################
 
 use strict;
-use POSIX ":sys_wait_h";
+use POSIX qw(:signal_h :sys_wait_h);
 use lib qw(/usr/lib/libDrakX);
 use standalone; # for explanations
 use common;
@@ -41,6 +41,8 @@ use Gtk3::Notify '-init', 'mgaapplet';
 use Net::DBus qw(:typing);
 use Rpmdrake::open_db;
 
+POSIX::sigprocmask(SIG_BLOCK, POSIX::SigSet->new(SIGCHLD)); 
+
 if (!find { $_ eq '--auto-update' } @ARGV) {
     if (my $pid = mgaonline::is_running('mgaapplet')) {
         if ($::testing) {
@@ -207,6 +209,7 @@ shouldStart() or die "$localfile should be set to TRUE: please use --force or -f
 go2State('delayed');
 
 Glib::Timeout->add_seconds($config{FIRST_CHECK_DELAY}/1000, sub {
+                       POSIX::sigprocmask(SIG_UNBLOCK, POSIX::SigSet->new(SIGCHLD));
                        $SIG{CHLD} = \&harvester;
                        # schedule future checks:
                        setup_cyclic_check();