1 files changed, 71 insertions, 0 deletions
diff --git a/test/iolint.awk b/test/iolint.awk
new file mode 100644
index 00000000..e7408151
--- /dev/null
+++ b/test/iolint.awk
@@ -0,0 +1,71 @@
+BEGIN {
+	LINT = 1
+
+	# `%.*s' used for input file and for output file
+	print "hi" > "f1"
+	fflush("f1")
+	getline x < "f1"
+	print close("f1")
+	print close("f1")
+	fflush()
+
+	# `%.*s' used for input file and input pipe
+	# `%.*s' used for input file and two-way pipe
+	# `%.*s' used for input pipe and two-way pipe
+	getline data3 < "echo hello"
+	"echo hello" |& getline data2
+	"echo hello" | getline data
+
+	print data, data2, data3
+
+	print close("echo hello")
+	print close("echo hello")
+	print close("echo hello")
+	fflush()
+
+	# `%.*s' used for input file and output pipe
+	getline x < "cat"
+	print "foo" | "cat"
+	print close("cat")
+	print close("cat")
+	fflush()
+
+	# unnecessary mixing of `>' and `>>' for file `%.*s'
+	print "foo" >  "f2"
+	print "bar" >> "f2"
+	print close("f2")
+	print close("f2")	# -1 expected here
+	fflush()
+
+	# `%.*s' used for output file and output pipe"
+	print "junk" > "md5sum"
+	print "hello" | "md5sum"
+	print close("md5sum")
+	print close("md5sum")
+	fflush()
+
+	# `%.*s' used for input pipe and output file
+	"echo hello" | getline junk
+	print "hello" > "echo hello"
+	print close("echo hello")
+	print close("echo hello")
+	fflush()
+
+	# `%.*s' used for output file and output pipe
+	# `%.*s' used for output file and two-way pipe
+	# `%.*s' used for output pipe and two-way pipe
+	print "hello" > "cat"
+	print "hello" | "cat"
+	print "hello" |& "cat"
+	print close("cat")
+	print close("cat")
+	print close("cat")
+	fflush()
+
+	# `%.*s' used for input pipe and output pipe
+	"echo hello" | getline junk
+	print "hello" | "echo hello"
+	print close("echo hello")
+	print close("echo hello")
+	fflush()
+}