fx.io: import system-level streams and uni-directional pipes

fx.io/test/pipes.c

@@ -0,0 +1,23 @@
+#include <fx/io/pipe.h>
+#include <stdio.h>
+
+int main(void)
+{
+	fx_iostream *read = NULL, *write = NULL;
+	fx_status status = fx_pipe_create(&read, &write);
+
+	if (!FX_OK(status)) {
+		fprintf(stderr,
+		        "failed to create pipe: %s\n",
+		        fx_status_description(status));
+		return -1;
+	}
+
+	fx_stream_write_cstr(write, "Hello, world!\n", NULL);
+
+	char buf[128];
+	fx_stream_read_line(read, buf, sizeof buf);
+
+	printf("read from pipe: %s\n", buf);
+	return 0;
+}