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tetex-bin  3.0
sigaction.c
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00001 /****************************************************************************
00002  * Copyright (c) 1998-2002,2003 Free Software Foundation, Inc.              *
00003  *                                                                          *
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00005  * copy of this software and associated documentation files (the            *
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00010  * furnished to do so, subject to the following conditions:                 *
00011  *                                                                          *
00012  * The above copyright notice and this permission notice shall be included  *
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00014  *                                                                          *
00015  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
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00022  *                                                                          *
00023  * Except as contained in this notice, the name(s) of the above copyright   *
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00028 
00029 /****************************************************************************
00030  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
00031  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
00032  *     and: Thomas E. Dickey                        1996-2003               *
00033  ****************************************************************************/
00034 
00035 /* This file provides sigaction() emulation using sigvec() */
00036 /* Use only if this is non POSIX system */
00037 
00038 MODULE_ID("$Id: sigaction.c,v 1.14 2003/12/07 01:06:52 tom Exp $")
00039 
00040 static int
00041 _nc_sigaction(int sig, sigaction_t * sigact, sigaction_t * osigact)
00042 {
00043     return sigvec(sig, sigact, osigact);
00044 }
00045 
00046 static int
00047 _nc_sigemptyset(sigset_t * mask)
00048 {
00049     *mask = 0;
00050     return 0;
00051 }
00052 
00053 static int
00054 _nc_sigprocmask(int mode, sigset_t * mask, sigset_t * omask)
00055 {
00056     sigset_t current = sigsetmask(0);
00057 
00058     if (omask)
00059        *omask = current;
00060 
00061     if (mode == SIG_BLOCK)
00062        current |= *mask;
00063     else if (mode == SIG_UNBLOCK)
00064        current &= ~*mask;
00065     else if (mode == SIG_SETMASK)
00066        current = *mask;
00067 
00068     sigsetmask(current);
00069     return 0;
00070 }
00071 
00072 static int
00073 _nc_sigaddset(sigset_t * mask, int sig)
00074 {
00075     *mask |= sigmask(sig);
00076     return 0;
00077 }
00078 
00079 /* not used in lib_tstp.c */
00080 #if 0
00081 static int
00082 _nc_sigsuspend(sigset_t * mask)
00083 {
00084     return sigpause(*mask);
00085 }
00086 
00087 static int
00088 _nc_sigdelset(sigset_t * mask, int sig)
00089 {
00090     *mask &= ~sigmask(sig);
00091     return 0;
00092 }
00093 
00094 static int
00095 _nc_sigismember(sigset_t * mask, int sig)
00096 {
00097     return (*mask & sigmask(sig)) != 0;
00098 }
00099 #endif