Prevent a race between KPPS initialization and privilege dropping.

1 files changed, 8 insertions, 0 deletions

diff --git a/gpsd.c b/gpsd.c
index aeb31a06..c42ad38d 100644
--- a/gpsd.c
+++ b/gpsd.c
@@ -1984,6 +1984,14 @@ int main(int argc, char *argv[])
 	}
     }
 
+#if defined(HAVE_SYS_TIMEPPS_H)
+    /*
+     * Wait here until all the thread spawns produced by opening command-line
+     * PPS devices no longer need root privileges.
+     */
+    gpsd_await_pps_initialization()
+#endif /* defined(HAVE_SYS_TIMEPPS_H) */
+
     /* drop privileges */
     if (getuid() == 0) {
 	struct passwd *pw;