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
|
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <sys/types.h>
#include <signal.h>
#include "ntp_syslog.h"
#include "ntp_stdlib.h"
#ifdef HAVE_SIGACTION
void
signal_no_reset(
#if defined(__STDC__) || defined(HAVE_STDARG_H)
int sig,
void (*func) (int)
#else
sig, func
#endif
)
#if defined(__STDC__) || defined(HAVE_STDARG_H)
#else
int sig;
void (*func) (int);
#endif
{
int n;
struct sigaction vec;
vec.sa_handler = func;
sigemptyset(&vec.sa_mask);
#if 0
#ifdef SA_RESTART
vec.sa_flags = SA_RESTART;
#else
vec.sa_flags = 0;
#endif
#else
vec.sa_flags = 0;
#endif
#ifdef SA_RESTART
/* Added for PPS clocks on Solaris 7 which get EINTR errors */
# ifdef SIGPOLL
if (sig == SIGPOLL) vec.sa_flags = SA_RESTART;
# endif
# ifdef SIGIO
if (sig == SIGIO) vec.sa_flags = SA_RESTART;
# endif
#endif
while (1)
{
struct sigaction ovec;
n = sigaction(sig, &vec, &ovec);
if (n == -1 && errno == EINTR) continue;
if (ovec.sa_flags
#ifdef SA_RESTART
&& ovec.sa_flags != SA_RESTART
#endif
)
msyslog(LOG_DEBUG, "signal_no_reset: signal %d had flags %x",
sig, ovec.sa_flags);
break;
}
if (n == -1) {
perror("sigaction");
exit(1);
}
}
#elif HAVE_SIGVEC
void
signal_no_reset(
int sig,
RETSIGTYPE (*func) (int)
)
{
struct sigvec sv;
int n;
bzero((char *) &sv, sizeof(sv));
sv.sv_handler = func;
n = sigvec(sig, &sv, (struct sigvec *)NULL);
if (n == -1) {
perror("sigvec");
exit(1);
}
}
#elif HAVE_SIGSET
void
signal_no_reset(
int sig,
RETSIGTYPE (*func) (int)
)
{
int n;
n = sigset(sig, func);
if (n == -1) {
perror("sigset");
exit(1);
}
}
#else
/* Beware! This implementation resets the signal to SIG_DFL */
void
signal_no_reset(
int sig,
RETSIGTYPE (*func) (int)
)
{
#ifdef SIG_ERR
if (SIG_ERR == signal(sig, func)) {
#else
int n;
n = signal(sig, func);
if (n == -1) {
#endif
perror("signal");
exit(1);
}
}
#endif
|
