After fork(2) the pledge(2) in the parent proc can be reduced to

"stdio rpath sendfd" so that it can call {l,}stat/open and sendfd for imsg_*
in order to send fds to the child proc which is already pledged by recvfd to
receive them

OK brynet@ deraadt@

usr.bin/file/file.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: file.c,v 1.68 2019/02/05 02:17:32 deraadt Exp $ */
+/* $OpenBSD: file.c,v 1.69 2019/11/30 14:01:45 mestre Exp $ */
 
 /*
  * Copyright (c) 2015 Nicholas Marriott <nicm@openbsd.org>
@@ -207,6 +207,9 @@ main(int argc, char **argv)
 	}
 	close(pair[1]);
 
+	if (pledge("stdio rpath sendfd", NULL) == -1)
+		err(1, "pledge");
+
 	fclose(magicfp);
 	magicfp = NULL;