From ea54c8bdf9458e2c187f15a2e52ca7cc0f735ef1 Mon Sep 17 00:00:00 2001
From: "Eric E. Coe" <Eric.Coe@oracle.com>
Date: Wed, 18 Oct 2000 00:03:54 -0400
Subject: [PATCH] Make Cwd more bulletproof in chrooted environments.

Subject: [ID 20001018.001] Fix for Cwd.pm (chroot)
Message-Id: <39ED596A.70E599FE@oracle.com>

p4raw-id: //depot/perl@7358
---
 lib/Cwd.pm | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/Cwd.pm b/lib/Cwd.pm
index dbeae69..7279591 100644
--- a/lib/Cwd.pm
+++ b/lib/Cwd.pm
@@ -89,7 +89,15 @@ sub _backtick_pwd {
 # Since some ports may predefine cwd internally (e.g., NT)
 # we take care not to override an existing definition for cwd().
 
-*cwd = \&_backtick_pwd unless defined &cwd;
+unless(defined &cwd) {
+    # The pwd command is not available in some chroot(2)'ed environments
+    if(grep { -x "$_/pwd" } split(':', $ENV{PATH})) {
+	*cwd = \&_backtick_pwd;
+    }
+    else {
+	*cwd = \&getcwd;
+    }
+}
 
 
 # By Brandon S. Allbery
-- 
2.7.4