1 files changed, 51 insertions, 0 deletions
diff --git a/appl/alphabet/main/echo.b b/appl/alphabet/main/echo.b
new file mode 100644
index 00000000..3b01c951
--- /dev/null
+++ b/appl/alphabet/main/echo.b
@@ -0,0 +1,51 @@
+implement Echo, Mainmodule;
+include "sys.m";
+	sys: Sys;
+include "draw.m";
+include "sh.m";
+include "alphabet/reports.m";
+	reports: Reports;
+		Report, report: import reports;
+include "alphabet.m";
+	alphabet: Alphabet;
+		Value: import alphabet;
+
+Echo: module {};
+
+typesig(): string
+{
+	return "fs-n";
+}
+
+init()
+{
+	sys = load Sys Sys->PATH;
+	alphabet = load Alphabet Alphabet->PATH;
+	reports = load Reports Reports->PATH;
+}
+
+quit()
+{
+}
+
+run(nil: ref Draw->Context, nil: ref Reports->Report, nil: chan of string,
+		opts: list of (int, list of ref Alphabet->Value),
+		args: list of ref Alphabet->Value): ref Alphabet->Value
+{
+	f := chan of ref Sys->FD;
+	s := (hd args).s().i;
+	if(opts == nil)
+		s[len s] = '\n';
+	spawn echoproc(f, s);
+	return ref Value.Vf(f);
+}
+
+echoproc(f: chan of ref Sys->FD, s: string)
+{
+	f <-= nil;
+	fd := <-f;
+	if(fd == nil)
+		exit;
+	sys->fprint(fd, "%s", s);
+	sys->write(fd, array[0] of byte, 0);
+}