Log the SELinux context at startup.

Upstream-Status: unlikely to be any interest in this upstream

diff --git a/configure.in b/configure.in
index eedba50..a208b53 100644
--- a/configure.in
+++ b/configure.in
@@ -484,6 +484,11 @@ getloadavg
 dnl confirm that a void pointer is large enough to store a long integer
 APACHE_CHECK_VOID_PTR_LEN
 
+AC_CHECK_LIB(selinux, is_selinux_enabled, [
+   AC_DEFINE(HAVE_SELINUX, 1, [Defined if SELinux is supported])
+   APR_ADDTO(HTTPD_LIBS, [-lselinux])
+])
+
 AC_CACHE_CHECK([for gettid()], ac_cv_gettid,
 [AC_TRY_RUN(#define _GNU_SOURCE
 #include <unistd.h>
diff --git a/server/core.c b/server/core.c
index ec74029..cb8e463 100644
--- a/server/core.c
+++ b/server/core.c
@@ -59,6 +59,10 @@
 #include <unistd.h>
 #endif
 
+#ifdef HAVE_SELINUX
+#include <selinux/selinux.h>
+#endif
+
 /* LimitRequestBody handling */
 #define AP_LIMIT_REQ_BODY_UNSET         ((apr_off_t) -1)
 #define AP_DEFAULT_LIMIT_REQ_BODY       ((apr_off_t) 0)
@@ -4971,6 +4975,28 @@ static int core_post_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *pte
     }
 #endif
 
+#ifdef HAVE_SELINUX
+    {
+        static int already_warned = 0;
+        int is_enabled = is_selinux_enabled() > 0;
+        
+        if (is_enabled && !already_warned) {
+            security_context_t con;
+            
+            if (getcon(&con) == 0) {
+                
+                ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, NULL,
+                             "SELinux policy enabled; "
+                             "httpd running as context %s", con);
+                
+                already_warned = 1;
+                
+                freecon(con);
+            }
+        }
+    }
+#endif
+
     return OK;
 }