rs232-write: Check return value of osmo_fd_register()

Change-Id: If40e85600ca1dfbda5975d7aa92cccdb11f9c34d
Fixes: Coverity CID 57632

1 files changed, 6 insertions, 1 deletions

diff --git a/examples/rs232-write.c b/examples/rs232-write.c
index 11498f3..d5aee68 100644
--- a/examples/rs232-write.c
+++ b/examples/rs232-write.c
@@ -347,6 +347,7 @@ static int kbd_cb(struct osmo_fd *fd, unsigned int what)
 int main(void)
 {
 	struct osmo_fd *kbd_ofd;
+	int rc;
 
 	tall_test = talloc_named_const(NULL, 1, "osmo_rs232_test");
 
@@ -379,7 +380,11 @@ int main(void)
         kbd_ofd->when = BSC_FD_READ;
         kbd_ofd->data = NULL;
         kbd_ofd->cb = kbd_cb;
-        osmo_fd_register(kbd_ofd);
+        rc = osmo_fd_register(kbd_ofd);
+	if (rc < 0) {
+		LOGP(DRS232TEST, LOGL_ERROR, "FD Register\n");
+		exit(EXIT_FAILURE);
+	}
 
 	while(1) {
 		osmo_select_main(0);