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
|
/*
* compat.c
*
* Compatibility functions for different OSes
*
* $Id: compat.c,v 1.6 2005/08/22 00:48:34 quozl Exp $
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include "compat.h"
#ifndef HAVE_STRLCPY
#include <string.h>
#include <stdio.h>
void strlcpy(char *dst, const char *src, size_t size)
{
strncpy(dst, src, size - 1);
dst[size - 1] = '\0';
}
#endif
#ifndef HAVE_MEMMOVE
void *memmove(void *dst, const void *src, size_t size)
{
bcopy(src, dst, size);
return dst;
}
#endif
#ifndef HAVE_SETPROCTITLE
#include "inststr.h"
#endif
#define __USE_BSD 1
#include <stdarg.h>
#include <stdio.h>
void my_setproctitle(int argc, char **argv, const char *format, ...) {
char proctitle[64];
va_list parms;
va_start(parms, format);
vsnprintf(proctitle, sizeof(proctitle), format, parms);
#ifndef HAVE_SETPROCTITLE
inststr(argc, argv, proctitle);
#else
setproctitle(proctitle);
#endif
va_end(parms);
}
/* signal to pipe delivery implementation */
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
/* pipe private to process */
static int sigpipe[2];
/* create a signal pipe, returns 0 for success, -1 with errno for failure */
int sigpipe_create()
{
int rc;
rc = pipe(sigpipe);
if (rc < 0) return rc;
fcntl(sigpipe[0], F_SETFD, FD_CLOEXEC);
fcntl(sigpipe[1], F_SETFD, FD_CLOEXEC);
#ifdef O_NONBLOCK
#define FLAG_TO_SET O_NONBLOCK
#else
#ifdef SYSV
#define FLAG_TO_SET O_NDELAY
#else /* BSD */
#define FLAG_TO_SET FNDELAY
#endif
#endif
rc = fcntl(sigpipe[1], F_GETFL);
if (rc != -1)
rc = fcntl(sigpipe[1], F_SETFL, rc | FLAG_TO_SET);
if (rc < 0) return rc;
return 0;
#undef FLAG_TO_SET
}
/* generic handler for signals, writes signal number to pipe */
void sigpipe_handler(int signum)
{
write(sigpipe[1], &signum, sizeof(signum));
signal(signum, sigpipe_handler);
}
/* assign a signal number to the pipe */
void sigpipe_assign(int signum)
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = sigpipe_handler;
sigaction(signum, &sa, NULL);
}
/* return the signal pipe read file descriptor for select(2) */
int sigpipe_fd()
{
return sigpipe[0];
}
/* read and return the pending signal from the pipe */
int sigpipe_read()
{
int signum;
read(sigpipe[0], &signum, sizeof(signum));
return signum;
}
void sigpipe_close()
{
close(sigpipe[0]);
close(sigpipe[1]);
}
|
