test: use chiark-tcl-hbytes rather than ad-hoc \x quoting

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/test/invoke b/test/invoke
index fb9ce2ca1b389673765f631f45956c065cc7a895..30106d95538d62eea53c3594df103210be80d592 100755 (executable)
--- a/test/invoke
+++ b/test/invoke
@@ -2,6 +2,8 @@
 
 package require Tclx
 
+load chiark_tcl_hbytes-1.so
+
 set netlink(inside) {
     local-address "172.18.232.9";
     secnet-address "172.18.232.10";
@@ -103,7 +105,7 @@ proc spawn-secnet {which} {
     if {!$pid} {
        execl ./secnet $argl
     }
-    puts -nonewline $netlinkfh($which.t) "\xc0"
+    puts -nonewline $netlinkfh($which.t) [hbytes h2raw c0]
 }
 
 proc netlink-readable {which} {