- use pthread_sigmask instead of sigprocmask
 - show_sigset should take the size of dereferenced variable
 - zeroify sigsets before use, since libc has own definition
   for sigset which doesn't match one the kernel uses

http://bugzilla.openvz.org/show_bug.cgi?id=2437Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>