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Annotation of prex-old/usr/lib/posix/signal/sigprocmask.c, Revision 1.1.1.1

1.1       nbrk        1: /*
                      2:  * Copyright (c) 2005, Kohsuke Ohtani
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  * 3. Neither the name of the author nor the names of any co-contributors
                     14:  *    may be used to endorse or promote products derived from this software
                     15:  *    without specific prior written permission.
                     16:  *
                     17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
                     18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
                     21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     27:  * SUCH DAMAGE.
                     28:  */
                     29:
                     30: #include <prex/signal.h>
                     31:
                     32: #include <stddef.h>
                     33: #include <signal.h>
                     34: #include <errno.h>
                     35:
                     36: int
                     37: sigprocmask(int how, const sigset_t *set, sigset_t *oldset)
                     38: {
                     39:        sigset_t newset = 0;
                     40:
                     41:        if (set != NULL)
                     42:                newset = *set;
                     43:
                     44:        SIGNAL_LOCK();
                     45:
                     46:        if (oldset != NULL)
                     47:                *oldset = __sig_mask;
                     48:
                     49:        if (set != NULL) {
                     50:                switch (how) {
                     51:                case SIG_BLOCK:
                     52:                        __sig_mask |= newset;
                     53:                        break;
                     54:                case SIG_UNBLOCK:
                     55:                        __sig_mask &= ~newset;
                     56:                        break;
                     57:                case SIG_SETMASK:
                     58:                        __sig_mask = newset;
                     59:                        break;
                     60:                default:
                     61:                        SIGNAL_UNLOCK();
                     62:                        errno = EINVAL;
                     63:                        return -1;
                     64:                }
                     65:        }
                     66:        __sig_mask &= ~(sigmask(SIGSTOP) | sigmask(SIGKILL));
                     67:
                     68:        SIGNAL_UNLOCK();
                     69:
                     70:        /* Process pending signal */
                     71:        __sig_flush();
                     72:
                     73:        return 0;
                     74: }