1 files changed, 88 insertions, 0 deletions
diff --git a/docs/code/pipe-echo-server/main.c b/docs/code/pipe-echo-server/main.c
new file mode 100644
index 00000000..4ba4246e
--- /dev/null
+++ b/docs/code/pipe-echo-server/main.c
@@ -0,0 +1,88 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <uv.h>
+
+uv_loop_t *loop;
+
+typedef struct {
+    uv_write_t req;
+    uv_buf_t buf;
+} write_req_t;
+
+void free_write_req(uv_write_t *req) {
+    write_req_t *wr = (write_req_t*) req;
+    free(wr->buf.base);
+    free(wr);
+}
+
+void alloc_buffer(uv_handle_t *handle, size_t suggested_size, uv_buf_t *buf) {
+  buf->base = malloc(suggested_size);
+  buf->len = suggested_size;
+}
+
+void echo_write(uv_write_t *req, int status) {
+    if (status < 0) {
+        fprintf(stderr, "Write error %s\n", uv_err_name(status));
+    }
+    free_write_req(req);
+}
+
+void echo_read(uv_stream_t *client, ssize_t nread, const uv_buf_t *buf) {
+    if (nread > 0) {
+        write_req_t *req = (write_req_t*) malloc(sizeof(write_req_t));
+        req->buf = uv_buf_init(buf->base, nread);
+        uv_write((uv_write_t*) req, client, &req->buf, 1, echo_write);
+        return;
+    }
+
+    if (nread < 0) {
+        if (nread != UV_EOF)
+            fprintf(stderr, "Read error %s\n", uv_err_name(nread));
+        uv_close((uv_handle_t*) client, NULL);
+    }
+
+    free(buf->base);
+}
+
+void on_new_connection(uv_stream_t *server, int status) {
+    if (status == -1) {
+        // error!
+        return;
+    }
+
+    uv_pipe_t *client = (uv_pipe_t*) malloc(sizeof(uv_pipe_t));
+    uv_pipe_init(loop, client, 0);
+    if (uv_accept(server, (uv_stream_t*) client) == 0) {
+        uv_read_start((uv_stream_t*) client, alloc_buffer, echo_read);
+    }
+    else {
+        uv_close((uv_handle_t*) client, NULL);
+    }
+}
+
+void remove_sock(int sig) {
+    uv_fs_t req;
+    uv_fs_unlink(loop, &req, "echo.sock", NULL);
+    exit(0);
+}
+
+int main() {
+    loop = uv_default_loop();
+
+    uv_pipe_t server;
+    uv_pipe_init(loop, &server, 0);
+
+    signal(SIGINT, remove_sock);
+
+    int r;
+    if ((r = uv_pipe_bind(&server, "echo.sock"))) {
+        fprintf(stderr, "Bind error %s\n", uv_err_name(r));
+        return 1;
+    }
+    if ((r = uv_listen((uv_stream_t*) &server, 128, on_new_connection))) {
+        fprintf(stderr, "Listen error %s\n", uv_err_name(r));
+        return 2;
+    }
+    return uv_run(loop, UV_RUN_DEFAULT);
+}