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/* Copyright (C) 2001, 2014-2019 Free Software Foundation, Inc.
Written by Neal H Walfield <neal@cs.uml.edu>
This file is part of the GNU Hurd.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with the GNU Hurd. If not, see <http://www.gnu.org/licenses/>. */
#include "fshelp.h"
#include "rlock.h"
#include <fcntl.h>
#include <sys/file.h>
int fshelp_rlock_peropen_status (struct rlock_peropen *po)
{
struct rlock_list *l;
if (! *po->locks)
return LOCK_UN;
for (l = *po->locks; l; l = l->po.next)
if (l->type == F_WRLCK)
return LOCK_EX;
return LOCK_SH;
}
/* Like fshelp_rlock_peropen_status except for all users of NODE. */
int fshelp_rlock_node_status (struct rlock_box *box)
{
struct rlock_list *l;
if (! box->locks)
return LOCK_UN;
for (l = box->locks; l; l = l->node.next)
if (l->type == F_WRLCK)
return LOCK_EX;
return LOCK_SH;
}
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