misc/wasm: add stub for fs.openSync for browsers

This stub is necessary so the time package can fail to load
the timezone files in a nice way. It transitively makes the
log package work in browsers.

Change-Id: I4d360df82989d9b40cd31bb4508a6d057534443e
Reviewed-on: https://go-review.googlesource.com/118977
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

diff --git a/misc/wasm/wasm_exec.js b/misc/wasm/wasm_exec.js
index ada6f0cd9281f0637e3b7acdce0684965d8cf72b..e0759a7ce1bfa05c05cc983be14b3df4b35eebf5 100755 (executable)
--- a/misc/wasm/wasm_exec.js
+++ b/misc/wasm/wasm_exec.js
@@ -41,6 +41,11 @@
                                }
                                return buf.length;
                        },
+                       openSync(path, flags, mode) {
+                               const err = new Error("not implemented");
+                               err.code = "ENOSYS";
+                               throw err;
+                       },
                };
        }