/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup POSIXAPI
*
* @brief Replacing signal mask with *sigmask and suspending calling process
*/
/*
* 3.3.7 Wait for a Signal, P1003.1b-1993, p. 75
*
* COPYRIGHT (c) 1989-2004.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stddef.h>
#include <assert.h>
#include <signal.h>
#include <errno.h>
#include <rtems/seterr.h>
int sigsuspend(
const sigset_t *sigmask
)
{
sigset_t saved_signals_blocked;
sigset_t current_unblocked_signals;
#if defined(RTEMS_DEBUG)
int status;
#endif
/*
* We use SIG_BLOCK and not SIG_SETMASK because there may be
* signals which might be pending, which might get caught here.
* We want the signals to be caught inside sigtimedwait.
*
* We ignore the return status codes because sigsuspend() is
* defined to either terminate or return -1 with errno set to
* EINTR.
*/
#if defined(RTEMS_DEBUG)
status =
#else
(void)
#endif
sigprocmask( SIG_BLOCK, sigmask, &saved_signals_blocked );
current_unblocked_signals = ~(*sigmask);
#if defined(RTEMS_DEBUG)
status =
#else
(void)
#endif
sigtimedwait( ¤t_unblocked_signals, NULL, NULL );
(void) sigprocmask( SIG_SETMASK, &saved_signals_blocked, NULL );
/*
* sigtimedwait() returns the signal number while sigsuspend()
* is supposed to return -1 and EINTR when a signal is caught.
*/
#if defined(RTEMS_DEBUG)
assert( status != -1 );
#endif
rtems_set_errno_and_return_minus_one( EINTR );
}