release/src/router/libncurses/ncurses/base/sigaction.c

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   2  * Copyright (c) 1998-2002,2003 Free Software Foundation, Inc.              *
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  28
  29 /****************************************************************************
  30  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  31  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
  32  *     and: Thomas E. Dickey                        1996-2003               *
  33  ****************************************************************************/
  34
  35 /* This file provides sigaction() emulation using sigvec() */
  36 /* Use only if this is non POSIX system */
  37
  38 MODULE_ID("$Id: sigaction.c,v 1.14 2003/12/07 01:06:52 tom Exp $")
  39
  40 static int
  41 _nc_sigaction(int sig, sigaction_t * sigact, sigaction_t * osigact)
  42 {
  43     return sigvec(sig, sigact, osigact);
  44 }
  45
  46 static int
  47 _nc_sigemptyset(sigset_t * mask)
  48 {
  49     *mask = 0;
  50     return 0;
  51 }
  52
  53 static int
  54 _nc_sigprocmask(int mode, sigset_t * mask, sigset_t * omask)
  55 {
  56     sigset_t current = sigsetmask(0);
  57
  58     if (omask)
  59         *omask = current;
  60
  61     if (mode == SIG_BLOCK)
  62         current |= *mask;
  63     else if (mode == SIG_UNBLOCK)
  64         current &= ~*mask;
  65     else if (mode == SIG_SETMASK)
  66         current = *mask;
  67
  68     sigsetmask(current);
  69     return 0;
  70 }
  71
  72 static int
  73 _nc_sigaddset(sigset_t * mask, int sig)
  74 {
  75     *mask |= sigmask(sig);
  76     return 0;
  77 }
  78
  79 /* not used in lib_tstp.c */
  80 #if 0
  81 static int
  82 _nc_sigsuspend(sigset_t * mask)
  83 {
  84     return sigpause(*mask);
  85 }
  86
  87 static int
  88 _nc_sigdelset(sigset_t * mask, int sig)
  89 {
  90     *mask &= ~sigmask(sig);
  91     return 0;
  92 }
  93
  94 static int
  95 _nc_sigismember(sigset_t * mask, int sig)
  96 {
  97     return (*mask & sigmask(sig)) != 0;
  98 }
  99 #endif