adtools/clib2

/*
 * $Id: signal_sigprocmask.c,v 1.6 2006-01-08 12:04:24 obarthel Exp $
 *
 * :ts=4
 *
 * Portable ISO 'C' (1994) runtime library for the Amiga computer
 * Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Neither the name of Olaf Barthel nor the names of contributors
 *     may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 *
 * 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.
 */

#ifndef _SIGNAL_HEADERS_H
#include "signal_headers.h"
#endif /* _SIGNAL_HEADERS_H */

/****************************************************************************/

/* The following is not part of the ISO 'C' (1994) standard. */

/****************************************************************************/

int
sigprocmask(int how, const sigset_t *set, sigset_t *oset)
{
    int result = ERROR;

    ENTER();

    SHOWVALUE(how);
    SHOWPOINTER(set);
    SHOWPOINTER(oset);

    if(how < SIG_BLOCK || how > SIG_SETMASK)
    {
        SHOWMSG("invalid operating mode");

        __set_errno(EINVAL);
        goto out;
    }

    if(oset != NULL)
        (*oset) = __signals_blocked;

    if(set != NULL)
    {
        SHOWVALUE(*set);

        switch(how)
        {
            case SIG_BLOCK:

                SHOWMSG("SIG_BLOCK");

                __signals_blocked |= (*set);
                break;

            case SIG_UNBLOCK:

                SHOWMSG("SIG_UNBLOCK");

                __signals_blocked &= ~(*set);
                break;

            case SIG_SETMASK:

                SHOWMSG("SIG_SETMASK");

                __signals_blocked = (*set);
                break;
        }
    }

    result = OK;

 out:

    RETURN(result);
    return(result);
}