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Annotation of src/usr.bin/rdist/signal.c, Revision 1.2

1.1       dm          1: /*
                      2:  * Copyright (c) 1993 Regents of the University of California.
                      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. All advertising materials mentioning features or use of this software
                     14:  *    must display the following acknowledgement:
                     15:  *     This product includes software developed by the University of
                     16:  *     California, Berkeley and its contributors.
                     17:  * 4. Neither the name of the University nor the names of its contributors
                     18:  *    may be used to endorse or promote products derived from this software
                     19:  *    without specific prior written permission.
                     20:  *
                     21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     31:  * SUCH DAMAGE.
                     32:  */
                     33:
                     34: #ifndef lint
                     35: static char RCSid[] =
                     36: "$Id: signal.c,v 6.1 1993/07/15 22:47:30 mcooper Exp mcooper $";
                     37:
                     38: static char sccsid[] = "@(#)signal.c";
                     39:
                     40: static char copyright[] =
                     41: "@(#) Copyright (c) 1993 Regents of the University of California.\n\
                     42:  All rights reserved.\n";
                     43: #endif /* not lint */
                     44:
                     45: #include "defs.h"
                     46:
                     47: #if     defined(NEED_SIGBLOCK)
                     48: static int current_mask = 0;
                     49:
                     50: int sigblock(mask)
                     51: int mask;
                     52: {
                     53:     int sig;
                     54:     int m;
                     55:     int oldmask;
                     56:
                     57:     oldmask = current_mask;
                     58:     for ( sig = 1, m = 1; sig <= MAXSIG; sig++, m <<= 1 ) {
                     59:         if (mask & m)  {
                     60:             sighold(sig);
                     61:             current_mask |= m;
                     62:         }
                     63:     }
                     64:     return oldmask;
                     65: }
                     66: #endif /* NEED_SIGBLOCK */
                     67:
                     68: #if    defined(NEED_SIGSETMASK)
                     69: int sigsetmask(mask)
                     70: int mask;
                     71: {
                     72:     int sig;
                     73:     int m;
                     74:     int oldmask;
                     75:
                     76:     oldmask = current_mask;
                     77:     for ( sig = 1, m = 1; sig <= MAXSIG; sig++, m <<= 1 ) {
                     78:         if (mask & m)  {
                     79:             sighold(sig);
                     80:             current_mask |= m;
                     81:         }
                     82:         else  {
                     83:             sigrelse(sig);
                     84:             current_mask &= ~m;
                     85:         }
                     86:     }
                     87:     return oldmask;
                     88: }
                     89: #endif /* NEED_SIGSETMASK */