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/*
* Copyright (C) 2010-2012 Free Software Foundation, Inc.
* Copyright (C) 2014 Red Hat
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GnuTLS.
*
* The GnuTLS is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
#include <config.h>
#include <gnutls_int.h>
#include <gnutls_errors.h>
#include <sys/socket.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <atfork.h>
#ifndef _WIN32
# if defined(HAVE___REGISTER_ATFORK) || defined(HAVE_PTHREAD_ATFORK)
# define HAVE_ATFORK
# endif
/* The maximum number of users of the API */
# define MAX_VALS 6
static unsigned int * fvals[MAX_VALS];
static unsigned int fvals_size = 0;
# ifdef HAVE_ATFORK
static void fork_handler(void)
{
unsigned i;
for (i=0;i<fvals_size;i++)
*fvals[i] = 1;
}
# endif
static void set_val_on_fork(unsigned int *val, unsigned int def)
{
if (fvals_size >= MAX_VALS)
abort(); /* internal error */
*val = def;
fvals[fvals_size++] = val;
}
void _gnutls_fork_set_val(unsigned int *val)
{
# ifdef HAVE_ATFORK
set_val_on_fork(val, 0);
# else
set_val_on_fork(val, getpid());
# endif
}
# if defined(HAVE_PTHREAD_ATFORK)
# include <pthread.h>
int _gnutls_register_fork_handler(void)
{
if (pthread_atfork(NULL, NULL, fork_handler) != 0)
return gnutls_assert_val(GNUTLS_E_INTERNAL_ERROR);
return 0;
}
# elif defined(HAVE___REGISTER_ATFORK)
extern int __register_atfork(void (*)(void), void(*)(void), void (*)(void), void *);
extern void *__dso_handle;
int _gnutls_register_fork_handler(void)
{
if (__register_atfork(NULL, NULL, fork_handler, __dso_handle) != 0)
return gnutls_assert_val(GNUTLS_E_INTERNAL_ERROR);
return 0;
}
# else
/* we have to detect fork manually */
int _gnutls_register_fork_handler(void)
{
return 0;
}
# endif
#endif /* !_WIN32 */
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