From b5da98396eee6e2431ffa30d41ad2a75570ab6bb Mon Sep 17 00:00:00 2001
From: Ian Douglas Scott <ian@iandouglasscott.com>
Date: Wed, 12 Jul 2017 23:03:53 -0700
Subject: [PATCH] Strip whitspaces after #!

Autotools configure scripts seem to use "#! /bin/sh"
---
 src/syscall/process.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/syscall/process.rs b/src/syscall/process.rs
index f861635..b33d033 100644
--- a/src/syscall/process.rs
+++ b/src/syscall/process.rs
@@ -584,6 +584,9 @@ pub fn exec(path: &[u8], arg_ptrs: &[[usize; 2]]) -> Result<usize> {
 
             if data.starts_with(b"#!") {
                 if let Some(line) = data[2..].split(|&b| b == b'\n').next() {
+                    // Strip whitespace
+                    let line = &line[line.iter().position(|&b| b != b' ')
+                                         .unwrap_or(0)..];
                     if ! args.is_empty() {
                         args.remove(0);
                     }