Make logging (lib.c) and privileges (privs.c) pthread safe

lib.c: use a mutex to protect all public methods.  Replaced
code in command.c etc that modified zlog_default directly with
interlocked getters and setters.  Requires that vty_log in vty.c
handles its own pthread safety TBA.

privs.c: use a mutex to protect all public methods. Counts RAISE
and LOWER so that privilege stays RAISED until all pthreads
have lowered.  Improved messages in test-privs.c

1 files changed, 1 insertions, 4 deletions

diff --git a/lib/vty.c b/lib/vty.c
index 3bf7eb55..7ed2dba7 100644
--- a/lib/vty.c
+++ b/lib/vty.c
@@ -440,10 +440,7 @@ vty_command (struct vty *vty, char *buf)
   ret = cmd_execute_command (vline, vty, NULL, 0);
 
   /* Get the name of the protocol if any */
-  if (zlog_default)
-      protocolname = zlog_proto_names[zlog_default->protocol];
-  else
-      protocolname = zlog_proto_names[ZLOG_NONE];
+  protocolname = zlog_get_proto_name(NULL);
 
 #ifdef CONSUMED_TIME_CHECK
     GETRUSAGE(&after);