tests: add unbuffered tee(1)-like helper

Buffering enabled in tee(1) was making tests more
difficult to debug.

1 files changed, 12 insertions, 0 deletions

diff --git a/t/bin/utee b/t/bin/utee
new file mode 100755
index 0000000..e48f307
--- /dev/null
+++ b/t/bin/utee
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# tee(1) as distributed on most(all?) systems is buffered in luserspace
+# this only does unbuffered writes (with line-buffered input) to make
+# test output appear in real-time
+# -*- encoding: binary -*-
+$stdin.binmode
+$stdout.binmode
+fp = File.open(ARGV.shift, "wb")
+$stdin.each_line do |line|
+  fp.syswrite line
+  $stdout.syswrite line
+end