From 92a97d1dd486f793d35a33fa7b111d34f0e4e657 Mon Sep 17 00:00:00 2001
From: Syrus Akbary <me@syrusakbary.com>
Date: Wed, 5 Dec 2018 15:14:58 -0800
Subject: [PATCH] Added emscripten _sysconf

---
 Cargo.lock                 |  2 +-
 src/apis/emscripten/env.rs | 10 +++++++++-
 src/apis/emscripten/mod.rs |  7 ++++++-
 3 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index bc345ad5915..a9e9873ecac 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -675,7 +675,7 @@ dependencies = [
 
 [[package]]
 name = "wasmer"
-version = "0.1.0"
+version = "0.1.1"
 dependencies = [
  "byteorder 1.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "cranelift-codegen 0.23.0",
diff --git a/src/apis/emscripten/env.rs b/src/apis/emscripten/env.rs
index f10bd8f770d..cd4e8db4bc3 100644
--- a/src/apis/emscripten/env.rs
+++ b/src/apis/emscripten/env.rs
@@ -1,6 +1,6 @@
 use super::super::host;
 /// NOTE: These syscalls only support wasm_32 for now because they take u32 offset
-use libc::{c_int, getgrnam as libc_getgrnam, getpwnam as libc_getpwnam};
+use libc::{c_int, getgrnam as libc_getgrnam, getpwnam as libc_getpwnam, c_long, sysconf};
 use std::ffi::CStr;
 use std::mem;
 use std::os::raw::c_char;
@@ -110,3 +110,11 @@ pub extern "C" fn _getpagesize() -> u32 {
 pub extern "C" fn ___build_environment(environ: c_int) {
     debug!("emscripten::___build_environment {}", environ);
 }
+
+pub extern "C" fn _sysconf(name: c_int, instance: &mut Instance) -> c_long {
+    debug!("emscripten::_sysconf {}", name);
+    // TODO: Implement like emscripten expects regarding memory/page size
+    unsafe {
+        sysconf(name)
+    }
+}
diff --git a/src/apis/emscripten/mod.rs b/src/apis/emscripten/mod.rs
index cca522fc834..ad6165211d2 100644
--- a/src/apis/emscripten/mod.rs
+++ b/src/apis/emscripten/mod.rs
@@ -409,12 +409,17 @@ pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> {
         "_getpagesize",
         ImportValue::Func(env::_getpagesize as _),
     );
+    import_object.set(
+        "env",
+        "_sysconf",
+        ImportValue::Func(env::_sysconf as _),
+    );
 
     mock_external!(import_object, _waitpid);
     mock_external!(import_object, _utimes);
     mock_external!(import_object, _usleep);
     // mock_external!(import_object, _time);
-    mock_external!(import_object, _sysconf);
+    // mock_external!(import_object, _sysconf);
     // mock_external!(import_object, _strftime);
     mock_external!(import_object, _sigsuspend);
     // mock_external!(import_object, _sigprocmask);