From aff2f6ece896e0fe76a2c8853abf868f689006f0 Mon Sep 17 00:00:00 2001
From: Richard Musiol <mail@richard-musiol.de>
Date: Tue, 20 Nov 2018 21:49:41 +0100
Subject: [PATCH] misc/wasm: add stub for fs.read on browsers

Using fmt.Scanln in a browser environment caused a panic, since there
was no stub for fs.read. This commit adds a stub that returns ENOSYS.

Fixes #27773.

Change-Id: I79b019039e4bc90da51d71a4edddf3bd7809ff45
Reviewed-on: https://go-review.googlesource.com/c/150617
Run-TryBot: Richard Musiol <neelance@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
---
 misc/wasm/wasm_exec.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/misc/wasm/wasm_exec.js b/misc/wasm/wasm_exec.js
index 83704a054f..743eaf70b2 100644
--- a/misc/wasm/wasm_exec.js
+++ b/misc/wasm/wasm_exec.js
@@ -61,6 +61,11 @@
 				err.code = "ENOSYS";
 				callback(err);
 			},
+			read(fd, buffer, offset, length, position, callback) {
+				const err = new Error("not implemented");
+				err.code = "ENOSYS";
+				callback(err);
+			},
 			fsync(fd, callback) {
 				callback(null);
 			},
-- 
2.50.0