summaryrefslogtreecommitdiff
path: root/support/dktools/dk3signl.c
blob: cec1e78a66e3ffa13a3b03901be992b7a4e8787b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
/*
Copyright (C) 2011-2020, Dirk Krause
SPDX-License-Identifier: BSD-3-Clause
*/

/*
	WARNING: This file was generated by the dkct program (see
	http://dktools.sourceforge.net/ for details).
	Changes you make here will be lost if dkct is run again!
	You should modify the original source and run dkct on it.
	Original source: dk3signl.ctr
*/

/**	@file dk3signl.c The dk3signl module.
*/


#line 47 "dk3signl.ctr"

#include "dk3all.h"
#include "dk3unused.h"





#line 54 "dk3signl.ctr"



#if DK3_HAVE_SIGACTION
/**	Set new signal disposition.
	@param	signo	Signal number of signal to modify.
	@param	fct	New signal disposition.
	@return	Previous signal disposition.
*/
static
dk3_signal_disp_t
dk3signal_sigaction(int signo, dk3_signal_disp_t fct)
{
  dk3_signal_disp_t	back = (dk3_signal_disp_t)SIG_ERR;
  struct sigaction	act, oact;

  act.sa_handler = fct;
  sigemptyset(&act.sa_mask);
  if(signo == SIGALRM) {
#ifdef SA_INTERRUPT
    act.sa_flags |= SA_INTERRUPT;
#else
#ifdef SA_RESTART
    act.sa_flags |= SA_RESTART;
#endif
#endif
  }
  if(sigaction(signo, &act, &oact) < 0) {
    back = (dk3_signal_disp_t)SIG_ERR;
  } else {
    back = (dk3_signal_disp_t)oact.sa_handler;
  }
  return back;
}
#endif


dk3_signal_disp_t
dk3signal_set(int signo, dk3_signal_disp_t fct)
{
  dk3_signal_disp_t	back = NULL;
#if DK3_HAVE_SIGACTION
/* + sigaction */
  back = dk3signal_sigaction(signo, fct);
/* - sigaction */
#else
#if DK3_HAVE_SIGSET
/* + sigset */
  back = (dk3_signal_disp_t)sigset(signo,fct);
/* - sigset */
#else
#if DK3_HAVE_SIGNAL
/* + signal */
  back = (dk3_signal_disp_t)signal(signo,fct);
/* - signal */
#else
#error	"No signal handling functions available"
#endif
#endif
#endif
  return back;
}



void
dk3signal_refresh(
  int			DK3_ARG_UNUSED(signo),
  dk3_signal_disp_t	DK3_ARG_UNUSED(fct)
)
{
#if DK3_HAVE_SIGACTION
  DK3_UNUSED_ARG(signo)
  DK3_UNUSED_ARG(fct)
#else
#if DK3_HAVE_SIGSET
  DK3_UNUSED_ARG(signo)
  DK3_UNUSED_ARG(fct)
#else
#if DK3_HAVE_SIGNAL
  (void)signal(signo, fct);
#else
#endif
#endif
#endif
}


int
dk3signal_available(void)
{
  int back = DK3_SIGNAL_HANDLING_TYPE_NONE;
#if DK3_HAVE_SIGACTION
  back = DK3_SIGNAL_HANDLING_TYPE_SIGACTION;
#else
#if DK3_HAVE_SIGSET
  back = DK3_SIGNAL_HANDLING_TYPE_SIGSET;
#else
#if DK3_HAVE_SIGNAL
  back = DK3_SIGNAL_HANDLING_TYPE_SIGNAL;
#endif
#endif
#endif
  return back;
}



/* vim: set ai sw=2 : */