From 73dea7905cb5fea2540256bacdfde33fe0ad1a0b Mon Sep 17 00:00:00 2001
From: Michael Meissner <gnu@the-meissners.org>
Date: Wed, 22 Nov 2000 18:26:10 +0000
Subject: Only reference environ indirectly through a pointer

---
 newlib/libc/posix/execl.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'newlib/libc/posix/execl.c')

diff --git a/newlib/libc/posix/execl.c b/newlib/libc/posix/execl.c
index 075df8eba..098005666 100644
--- a/newlib/libc/posix/execl.c
+++ b/newlib/libc/posix/execl.c
@@ -6,6 +6,11 @@
 #include <_ansi.h>
 #include <unistd.h>
 
+/* Only deal with a pointer to environ, to work around subtle bugs with shared
+   libraries and/or small data systems where the user declares his own
+   'environ'.  */
+static char ***p_environ = &environ;
+
 #ifdef _HAVE_STDC
 
 #include <stdarg.h>
@@ -38,5 +43,5 @@ execl (path, arg0, va_alist)
   while (argv[i++] != NULL);
   va_end (args);
 
-  return _execve (path, (char * _CONST  *) argv, environ);
+  return _execve (path, (char * _CONST  *) argv, *p_environ);
 }
-- 
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