Updates to a number of apps to remove warnings/compile errors under libc5.
Tested under both libc5 and libc6 and all seems well with these fixes.
 -Erik
diff --git a/tail.c b/tail.c
index 2027d92..3189d20 100644
--- a/tail.c
+++ b/tail.c
@@ -400,7 +400,7 @@
 			exit_status |= tail_file(argv[i], n_units);
 	}
 
-	exit(exit_status == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
+	return(exit_status == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
 }