fix(ext/node): implement uv.errname (#20785)

Fixes https://github.com/denoland/deno/issues/20617

1 files changed, 8 insertions, 0 deletions

diff --git a/ext/node/polyfills/internal_binding/uv.ts b/ext/node/polyfills/internal_binding/uv.ts
index c08d44565..3cb145d28 100644
--- a/ext/node/polyfills/internal_binding/uv.ts
+++ b/ext/node/polyfills/internal_binding/uv.ts
@@ -531,3 +531,11 @@ export const UV_EINVAL = codeMap.get("EINVAL")!;
 export const UV_ENOENT = codeMap.get("ENOENT");
 export const UV_ENOTSOCK = codeMap.get("ENOTSOCK")!;
 export const UV_UNKNOWN = codeMap.get("UNKNOWN")!;
+
+export function errname(errno: number): string {
+  const err = errorMap.get(errno);
+  if (err) {
+    return err[0];
+  }
+  return `UNKNOWN (${errno})`;
+}