libthread: add threadmaybackground

Programs that want to background themselves now need
to define threadmaybackground returning 1.
This avoids a confusing (to people and debuggers)
extra parent process for all the threaded programs
that will never want to background themselves.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/libthread/bg.c b/src/libthread/bg.c
new file mode 100644
index 00000000..2edbc0e4
--- /dev/null
+++ b/src/libthread/bg.c
@@ -0,0 +1,7 @@
+#include "threadimpl.h"
+
+int
+threadmaybackground(void)
+{
+	return 0;
+}