subsys: clear signal handlers

since we moved our signal handlers to be created before subsystems are
created, our new signal handlers (which namely blocks SIGTERM, used for
panicing) are passed on.  in order to restore full panic functionality,
we clear all signal blocks before passing execution to the subsystem

1 files changed, 4 insertions, 0 deletions

diff --git a/init/subsys.c b/init/subsys.c
index 3db2cb5..c3fe903 100644
--- a/init/subsys.c
+++ b/init/subsys.c
@@ -41,6 +41,10 @@ static int __subsystem_entry(struct subsystem_info *info)
     prctl(PR_SET_NAME, name);
     free(name);
 
+    /* clear signal handlers so SIGTERM is no longer caught */
+    static sigset_t set;
+    sigprocmask(SIG_SETMASK, &set, NULL);
+
     print(LOG_DEBUG "subsys: starting subsystem %s (%d)",
             info->fn_name, getpid());