init: handle getty string of "" (default)

	. the default entry for disabled ttys for getty
	  in /etc/ttys is "", but init crashed on handling that
	  string.

Change-Id: Ib7cd6c6869e338f47df0aa5abed36f15eda4f6ff

diff --git a/servers/init/init.c b/servers/init/init.c
index 4fc9bec45a6122f0c289e4be5964b3a2f8d4c150..abfe038d37a04bfefc6c9d76aa5941bcfe718b72 100644 (file)
--- a/servers/init/init.c
+++ b/servers/init/init.c
@@ -263,15 +263,16 @@ void startup(int linenr, struct ttyent *ttyp)
 
        /* Construct argv for execute() */
        ty_getty_argv = construct_argv(ttyp->ty_getty);
-       if (ty_getty_argv == NULL)
+       if (ty_getty_argv == NULL) {
                report(2, "construct_argv");
-
-       /* Execute the getty process. */
-       execute(ty_getty_argv);
+       } else {
+               /* Execute the getty process. */
+               execute(ty_getty_argv);
+       }
 
        /* Oops, disaster strikes. */
        fcntl(2, F_SETFL, fcntl(2, F_GETFL) | O_NONBLOCK);
-       if (linenr != 0) report(2, ty_getty_argv[0]);
+       if (linenr != 0 && ty_getty_argv) report(2, ty_getty_argv[0]);
        write(err[1], &errno, sizeof(errno));
        _exit(1);
   }