[Bug-cpio] mt non-block patch

[Clint Adams]

Avoid blocking on Linux 2.6 with cpio 2.6.  Probably should be guarded.

--- orig/src/mt.c
+++ mod/src/mt.c
@@ -742,9 +742,9 @@
        || (operation == MTDATCOMP)
 #endif
        )
-    tapedesc = rmtopen (tapedev, O_WRONLY, 0, rsh_command_option);
+    tapedesc = rmtopen (tapedev, O_WRONLY | O_NONBLOCK, 0, rsh_command_option);
   else
-    tapedesc = rmtopen (tapedev, O_RDONLY, 0, rsh_command_option);
+    tapedesc = rmtopen (tapedev, O_RDONLY | O_NONBLOCK, 0, rsh_command_option);
   if (tapedesc == -1)
     error (1, errno, "%s", tapedev);
   check_type (tapedev, tapedesc);