From: Alan Cox <alan@etchedpixels.co.uk>
Date: Thu, 20 Nov 2014 23:36:59 +0000 (+0000)
Subject: putenv: Fix NULL environment handling
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=6915de64078aeb2ec14cce2da49218d00acec707;p=FUZIX.git

putenv: Fix NULL environment handling

From: Will Sowerbutts
---

diff --git a/Library/libs/putenv.c b/Library/libs/putenv.c
index 6547ffab..06cbcd0a 100644
--- a/Library/libs/putenv.c
+++ b/Library/libs/putenv.c
@@ -21,7 +21,7 @@ static int extras;
    if( r == 0 )  len = strlen(var);
    else          len = r-var;
 
-   for(p=environ; *p; p++)
+   for(p=environ; p && *p; p++)
    {
       if( memcmp(var, *p, len) == 0 && (*p)[len] == '=' )
       {