blob: 0d5fe9dcec948b1ab11e767718386e18ed2acbba (
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
|
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2011 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* signal that disables syscall restart on interrupt with clear signal mask
* fun==SIG_DFL also unblocks signal
*/
#if !_UWIN
#undef signal
#define signal ______signal
#endif
#include <ast.h>
#include <sig.h>
#if !_UWIN
#undef signal
#undef _def_map_ast
#include <ast_map.h>
#if defined(__EXPORT__)
#define extern __EXPORT__
#endif
#endif
#if defined(SV_ABORT)
#undef SV_INTERRUPT
#define SV_INTERRUPT SV_ABORT
#endif
#if !_std_signal && (_lib_sigaction && defined(SA_NOCLDSTOP) || _lib_sigvec && defined(SV_INTERRUPT))
#if !defined(SA_NOCLDSTOP) || !defined(SA_INTERRUPT) && defined(SV_INTERRUPT)
#undef SA_INTERRUPT
#define SA_INTERRUPT SV_INTERRUPT
#undef sigaction
#define sigaction sigvec
#undef sigemptyset
#define sigemptyset(p) (*(p)=0)
#undef sa_flags
#define sa_flags sv_flags
#undef sa_handler
#define sa_handler sv_handler
#undef sa_mask
#define sa_mask sv_mask
#endif
extern Sig_handler_t
signal(int sig, Sig_handler_t fun)
{
struct sigaction na;
struct sigaction oa;
int unblock;
#ifdef SIGNO_MASK
unsigned int flags;
#endif
if (sig < 0)
{
sig = -sig;
unblock = 0;
}
else
unblock = fun == SIG_DFL;
#ifdef SIGNO_MASK
flags = sig & ~SIGNO_MASK;
sig &= SIGNO_MASK;
#endif
memzero(&na, sizeof(na));
na.sa_handler = fun;
#if defined(SA_INTERRUPT) || defined(SA_RESTART)
switch (sig)
{
#if defined(SIGIO) || defined(SIGTSTP) || defined(SIGTTIN) || defined(SIGTTOU)
#if defined(SIGIO)
case SIGIO:
#endif
#if defined(SIGTSTP)
case SIGTSTP:
#endif
#if defined(SIGTTIN)
case SIGTTIN:
#endif
#if defined(SIGTTOU)
case SIGTTOU:
#endif
#if defined(SA_RESTART)
na.sa_flags = SA_RESTART;
#endif
break;
#endif
default:
#if defined(SA_INTERRUPT)
na.sa_flags = SA_INTERRUPT;
#endif
break;
}
#endif
if (sigaction(sig, &na, &oa))
return 0;
if (unblock)
sigunblock(sig);
return oa.sa_handler;
}
#else
NoN(signal)
#endif
|
