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
|
/*
Copyright (C) 2006 Renaissance Technologies Corp.
main developer: HP Wei <hp@rentec.com>
Copyright (C) 2005 Renaissance Technologies Corp.
main developer: HP Wei <hp@rentec.com>
The code in this file is copied from
Richard Stevens' book
"UNIX Network Programming" Chap.22.3
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING.
If not, write to the Free Software Foundation,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "signal.h"
Sigfunc * signal(int signo, Sigfunc *func)
{
struct sigaction act, oact;
act.sa_handler = func;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
if (signo == SIGALRM) {
#ifdef SA_INTERRUPT
act.sa_flags |= SA_INTERRUPT; /* SunOS 4.x */
#endif
} else {
#ifdef SA_RESTART
act.sa_flags |= SA_RESTART; /* SVR4, 44BSD */
#endif
}
if (sigaction(signo, &act, &oact) < 0)
return(SIG_ERR);
return(oact.sa_handler);
}
/* end signal */
Sigfunc * Signal(int signo, Sigfunc *func) /* for our signal() function */
{
Sigfunc *sigfunc;
if ( (sigfunc = signal(signo, func)) == SIG_ERR)
perror("signal error");
return(sigfunc);
}
int Fcntl(int fd, int cmd, int arg)
{
int n;
if ( (n = fcntl(fd, cmd, arg)) == -1)
perror("fcntl error");
return(n);
}
int Ioctl(int fd, int request, void *arg)
{
int n;
if ( (n = ioctl(fd, request, arg)) == -1)
perror("ioctl error");
return(n); /* streamio of I_LIST returns value */
}
void Sigemptyset(sigset_t *set)
{
if (sigemptyset(set) == -1)
perror("sigemptyset error");
}
void Sigaddset(sigset_t *set, int signo)
{
if (sigaddset(set, signo) == -1)
perror("sigaddset error");
}
void Sigprocmask(int how, const sigset_t *set, sigset_t *oset)
{
if (sigprocmask(how, set, oset) == -1)
perror("sigprocmask error");
}
|
