ovsdb-server: Maintain the database lock with --detach.

Before this commit, "ovsdb-server --detach" would detach after it opened
the database file, which meant that the child process did not hold the
file lock on the database file (because a forked child process does not
inherit its parents' locks).  This commit fixes the problem by making
ovsdb-server open the database only after it has detached.  This fix, in
turn, required that daemonize() not chdir to /, because this would break
databases whose names are given relative to the current directory, and so
this commit also changes ovsdb-server to do so later.

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/daemon.h b/lib/daemon.h
index d0c324cf..06280ac2 100644
--- a/lib/daemon.h
+++ b/lib/daemon.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008 Nicira Networks.
+ * Copyright (c) 2008, 2009 Nicira Networks.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -55,7 +55,9 @@ char *make_pidfile_name(const char *name);
 void set_pidfile(const char *name);
 const char *get_pidfile(void);
 void set_no_chdir(void);
+bool is_chdir_enabled(void);
 void set_detach(void);
+bool get_detach(void);
 void daemonize(void);
 void die_if_already_running(void);
 void ignore_existing_pidfile(void);