xref: /openbsd/lib/libcurses/base/sigaction.c (revision 3bef86f7) 
1 /****************************************************************************
2  * Copyright 2020 Thomas E. Dickey                                          *
3  * Copyright 1998-2002,2003 Free Software Foundation, Inc.                  *
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29 
30 /****************************************************************************
31  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
32  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
33  *     and: Thomas E. Dickey                        1996-2003               *
34  ****************************************************************************/
35 
36 /* This file provides sigaction() emulation using sigvec() */
37 /* Use only if this is non POSIX system */
38 
39 MODULE_ID("$Id: sigaction.c,v 1.6 2023/10/17 09:52:09 nicm Exp $")
40 
41 static int
42 _nc_sigaction(int sig, sigaction_t * sigact, sigaction_t * osigact)
43 {
44     return sigvec(sig, sigact, osigact);
45 }
46 
47 static int
48 _nc_sigemptyset(sigset_t * mask)
49 {
50     *mask = 0;
51     return 0;
52 }
53 
54 static int
55 _nc_sigprocmask(int mode, sigset_t * mask, sigset_t * omask)
56 {
57     sigset_t current = sigsetmask(0);
58 
59     if (omask)
60 	*omask = current;
61 
62     if (mode == SIG_BLOCK)
63 	current |= *mask;
64     else if (mode == SIG_UNBLOCK)
65 	current &= ~*mask;
66     else if (mode == SIG_SETMASK)
67 	current = *mask;
68 
69     sigsetmask(current);
70     return 0;
71 }
72 
73 static int
74 _nc_sigaddset(sigset_t * mask, int sig)
75 {
76     *mask |= sigmask(sig);
77     return 0;
78 }
79 
80 /* not used in lib_tstp.c */
81 #if 0
82 static int
83 _nc_sigsuspend(sigset_t * mask)
84 {
85     return sigpause(*mask);
86 }
87 
88 static int
89 _nc_sigdelset(sigset_t * mask, int sig)
90 {
91     *mask &= ~sigmask(sig);
92     return 0;
93 }
94 
95 static int
96 _nc_sigismember(sigset_t * mask, int sig)
97 {
98     return (*mask & sigmask(sig)) != 0;
99 }
100 #endif
101