gspawn: Reset signal handlers for synchronous spawning

We should by default reset signal handlers; particularly with the
ability to install them via g_unix_signal_source_new(), we don't
want to call a user callback inside a fork()ed helper process.

https://bugzilla.gnome.org/show_bug.cgi?id=652072

diff --git a/glib/gspawn.c b/glib/gspawn.c
index 4cd5a1a..1eed98e 100644 (file)
--- a/glib/gspawn.c
+++ b/glib/gspawn.c
@@ -1238,6 +1238,12 @@ fork_exec_with_pipes (gboolean              intermediate_child,
       /* Immediate child. This may or may not be the child that
        * actually execs the new process.
        */
+
+      /* Reset some signal handlers that we may use */
+      signal (SIGCHLD, SIG_DFL);
+      signal (SIGINT, SIG_DFL);
+      signal (SIGTERM, SIG_DFL);
+      signal (SIGHUP, SIG_DFL);
       
       /* Be sure we crash if the parent exits
        * and we write to the err_report_pipe