build: support single file commands

1 files changed, 48 insertions, 0 deletions

diff --git a/src/cmd/netdog.c b/src/cmd/netdog.c
new file mode 100644
index 0000000..221dc9c
--- /dev/null
+++ b/src/cmd/netdog.c
@@ -0,0 +1,48 @@
+#include <camellia.h>
+#include <camellia/compat.h>
+#include <camellia/syscalls.h>
+#include <err.h>
+#include <stdio.h>
+#include <string.h>
+#include <thread.h>
+
+hid_t conn;
+
+void send_stdin(void *arg) { (void)arg;
+	static char buf[4096];
+	for (;;) {
+		// TODO define STDIN_FILENO
+		long ret = _sys_read(0, buf, sizeof buf, -1);
+		if (ret <= 0) return; /* instead of sending an empty packet, quit. */
+		ret = _sys_write(conn, buf, ret, -1, 0);
+		if (ret < 0) return;
+	}
+}
+
+void recv_stdout(void *arg) { (void)arg;
+	static char buf[4096];
+	for (;;) {
+		long ret = _sys_read(conn, buf, sizeof buf, -1);
+		if (ret < 0) return;
+		ret = _sys_write(1, buf, ret, -1, 0);
+		if (ret < 0) return;
+	}
+}
+
+int main(int argc, char **argv) {
+	if (argc < 2) {
+		fprintf(stderr, "usage: netdog /net/connect/source/target/proto/port\n");
+		return 1;
+	}
+
+	conn = camellia_open(argv[1], OPEN_RW);
+	if (conn < 0) {
+		err(1, "open %s", argv[1]);
+		return -conn;
+	}
+
+	thread_create(0, send_stdin, NULL);
+	thread_create(0, recv_stdout, NULL);
+	_sys_await();
+	return 0;
+}