1 files changed, 3 insertions, 0 deletions
diff --git a/src/ppp-watch.c b/src/ppp-watch.c
index c611d7e4..6a304179 100644
--- a/src/ppp-watch.c
+++ b/src/ppp-watch.c
@@ -162,6 +162,9 @@ detach(char *device) {
      * of the pppd process to its parent (i.e., it reads nothing). */
     close (pipeArray[0]);
 
+    /* Don't leak this into programs we call. */
+    fcntl(pipeArray[1], F_SETFD, FD_CLOEXEC);
+
     /* Redirect stdio to /dev/null. */
     fd = open("/dev/null", O_RDONLY);
     dup2(fd, STDIN_FILENO);