utils.h revision 5e97c3fcce787a5bc0f8ceef43aa3e05195b480a
/*
* lxc: linux Container library
*
* (C) Copyright IBM Corp. 2007, 2008
*
* Authors:
* Daniel Lezcano <dlezcano at fr.ibm.com>
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _utils_h
#define _utils_h
#define LXC_TTY_HANDLER(s) \
static struct sigaction lxc_tty_sa_##s; \
static void tty_##s##_handler(int sig, siginfo_t *info, void *ctx) \
{ \
if (lxc_tty_sa_##s.sa_handler == SIG_DFL || \
lxc_tty_sa_##s.sa_handler == SIG_IGN) \
return; \
(*lxc_tty_sa_##s.sa_sigaction)(sig, info, ctx); \
}
#define LXC_TTY_ADD_HANDLER(s) \
do { \
struct sigaction sa; \
sa.sa_sigaction = tty_##s##_handler; \
sa.sa_flags = SA_SIGINFO; \
sigfillset(&sa.sa_mask); \
/* No error expected with sigaction. */ \
sigaction(s, &sa, &lxc_tty_sa_##s); \
} while (0)
#define LXC_TTY_DEL_HANDLER(s) \
do { \
sigaction(s, &lxc_tty_sa_##s, NULL); \
} while (0)
#endif