1 files changed, 114 insertions, 0 deletions
diff --git a/test/functional/job/tty-test.c b/test/functional/job/tty-test.c
new file mode 100644
index 0000000000..25e76840aa
--- /dev/null
+++ b/test/functional/job/tty-test.c
@@ -0,0 +1,114 @@
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <uv.h>
+
+#ifdef _WIN32
+#include <windows.h>
+bool owns_tty(void)
+{
+  HWND consoleWnd = GetConsoleWindow();
+  DWORD dwProcessId;
+  GetWindowThreadProcessId(consoleWnd, &dwProcessId);
+  return GetCurrentProcessId() == dwProcessId;
+}
+#else
+bool owns_tty(void)
+{
+  // TODO: Check if the process is the session leader
+  return true;
+}
+#endif
+
+#define is_terminal(stream) (uv_guess_handle(fileno(stream)) == UV_TTY)
+#define BUF_SIZE 0xfff
+
+static void walk_cb(uv_handle_t *handle, void *arg) {
+  if (!uv_is_closing(handle)) {
+    uv_close(handle, NULL);
+  }
+}
+
+static void sigwinch_cb(uv_signal_t *handle, int signum)
+{
+  int width, height;
+  uv_tty_t *tty = handle->data;
+  uv_tty_get_winsize(tty, &width, &height);
+  fprintf(stderr, "screen resized. rows: %d, columns: %d\n", height, width);
+}
+
+static void sigint_cb(uv_signal_t *handle, int signum)
+{
+  bool *interrupted = handle->data;
+
+  if (*interrupted) {
+    uv_walk(uv_default_loop(), walk_cb, NULL);
+    return;
+  }
+
+  *interrupted = true;
+  fprintf(stderr, "interrupt received, press again to exit\n");
+}
+
+static void alloc_cb(uv_handle_t *handle, size_t suggested, uv_buf_t *buf)
+{
+  buf->len = BUF_SIZE;
+  buf->base = malloc(BUF_SIZE);
+}
+
+static void read_cb(uv_stream_t *stream, ssize_t cnt, const uv_buf_t *buf)
+{
+  if (cnt <= 0) {
+    uv_read_stop(stream);
+    return;
+  }
+
+  fprintf(stderr, "received data: ");
+  uv_loop_t write_loop;
+  uv_loop_init(&write_loop);
+  uv_tty_t out;
+  uv_tty_init(&write_loop, &out, 1, 0);
+  uv_write_t req;
+  uv_buf_t b = {.base = buf->base, .len = buf->len};
+  uv_write(&req, (uv_stream_t *)&out, &b, 1, NULL);
+  uv_run(&write_loop, UV_RUN_DEFAULT);
+  uv_close((uv_handle_t *)&out, NULL);
+  uv_run(&write_loop, UV_RUN_DEFAULT);
+  if (uv_loop_close(&write_loop)) {
+    abort();
+  }
+  free(buf->base);
+}
+
+int main(int argc, char **argv)
+{
+  if (!is_terminal(stdin)) {
+    fprintf(stderr, "stdin is not a terminal\n");
+    exit(2);
+  }
+
+  if (!is_terminal(stdout)) {
+    fprintf(stderr, "stdout is not a terminal\n");
+    exit(2);
+  }
+
+  if (!is_terminal(stderr)) {
+    fprintf(stderr, "stderr is not a terminal\n");
+    exit(2);
+  }
+
+  bool interrupted = false;
+  fprintf(stderr, "tty ready\n");
+  uv_tty_t tty;
+  uv_tty_init(uv_default_loop(), &tty, fileno(stderr), 1);
+  uv_read_start((uv_stream_t *)&tty, alloc_cb, read_cb);
+  uv_signal_t sigwinch_watcher, sigint_watcher;
+  uv_signal_init(uv_default_loop(), &sigwinch_watcher);
+  sigwinch_watcher.data = &tty;
+  uv_signal_start(&sigwinch_watcher, sigwinch_cb, SIGWINCH);
+  uv_signal_init(uv_default_loop(), &sigint_watcher);
+  sigint_watcher.data = &interrupted;
+  uv_signal_start(&sigint_watcher, sigint_cb, SIGINT);
+  uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  fprintf(stderr, "tty done\n");
+}