1 files changed, 29 insertions, 0 deletions
diff --git a/gl/tests/test-select-out.sh b/gl/tests/test-select-out.sh
new file mode 100755
index 0000000000..f83beeb1f5
--- /dev/null
+++ b/gl/tests/test-select-out.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+# Test select() on file descriptors opened for writing.
+
+tmpfiles=""
+trap 'rm -fr $tmpfiles' 1 2 3 15
+
+tmpfiles="$tmpfiles t-select-out.out t-select-out.tmp"
+
+# Regular files.
+
+./test-select-fd${EXEEXT} w 1 > t-select-out.out 2> t-select-out.tmp
+test `cat t-select-out.tmp` = "1" || exit 1
+
+# Pipes.
+
+( { echo abc; ./test-select-fd${EXEEXT} w 1; } | { sleep 1; cat; } ) > /dev/null 2> t-select-out.tmp
+test `cat t-select-out.tmp` = "0" || exit 1
+
+( { sleep 1; echo abc; ./test-select-fd${EXEEXT} w 1; } | cat) > /dev/null 2> t-select-out.tmp
+test `cat t-select-out.tmp` = "1" || exit 1
+
+# Special files.
+
+./test-select-fd${EXEEXT} w 1 > /dev/null 2> t-select-out.tmp
+test `cat t-select-out.tmp` = "1" || exit 1
+
+rm -fr $tmpfiles
+
+exit 0