Don't pass NULL to execve() for the environment array,

resolving a theoretical problem with standards compliance
and an actual problem with Purify.

Reviewed by: Joe Orton



git-svn-id: http://svn.apache.org/repos/asf/apr/apr/branches/0.9.x@312609 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 8 insertions, 0 deletions

diff --git a/threadproc/unix/proc.c b/threadproc/unix/proc.c
index 2ea75dd5f..aa9da0118 100644
--- a/threadproc/unix/proc.c
+++ b/threadproc/unix/proc.c
@@ -292,6 +292,14 @@ APR_DECLARE(apr_status_t) apr_proc_create(apr_proc_t *new,
                                           apr_pool_t *pool)
 {
     int i;
+    const char * const empty_envp[] = {NULL};
+
+    if (!env) { /* Specs require an empty array instead of NULL;
+                 * Purify will trigger a failure, even if many
+                 * implementations don't.
+                 */
+        env = empty_envp;
+    }
 
     new->in = attr->parent_in;
     new->err = attr->parent_err;