From f363bc83260b68aecc377da0b383c369ffd99b1e Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Tue, 4 Aug 2009 23:15:49 +0000
Subject: [PATCH] Follow Unix behavior and return 127 if the command is not
 found, and 126 if it is not executable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78120 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/System/Unix/Program.inc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/System/Unix/Program.inc b/lib/System/Unix/Program.inc
index d2baca80025..4814228e138 100644
--- a/lib/System/Unix/Program.inc
+++ b/lib/System/Unix/Program.inc
@@ -202,7 +202,7 @@ Program::Execute(const Path& path,
         execv(path.c_str(), (char**)args);
       // If the execve() failed, we should exit and let the parent pick up
       // our non-zero exit status.
-      exit(127);
+      exit(errno == ENOENT ? 127 : 126);
     }
 
     // Parent process: Break out of the switch to do our processing.