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
|
#include "config.h"
/*
** Copyright 1998 - 2006 Double Precision, Inc.
** See COPYING for distribution information.
*/
#include "maildrop.h"
#include "exittrap.h"
#include <signal.h>
#include <sysexits.h>
#include <errno.h>
#if SYSLOG_LOGGING
#include <syslog.h>
#endif
extern void killprocgroup();
int Maildrop::sigfpe;
static void sig_fpe(int)
{
maildrop.sigfpe=1;
signal (SIGFPE, sig_fpe);
}
void Maildrop::cleanup()
{
ExitTrap::onexit();
killprocgroup();
}
void Maildrop::bye(int n)
{
static const char msg[]="maildrop: signal 0x";
static const char hex[]="0123456789ABCDEF";
cleanup();
if (write(2, msg, sizeof(msg)-1) < 0 ||
write(2, hex+ ((n / 16) & 0x0F), 1) < 0 ||
write(2, hex+ (n & 0x0F), 1) < 0 ||
write(2, "\n", 1) < 0)
; /* gcc shut up */
_exit(EX_TEMPFAIL);
}
int Maildrop::trap(int (*func)(int, char *[]), int argc, char *argv[])
{
int n;
for (n=0; n<NSIG; n++)
signal(n, bye);
signal(SIGPIPE, SIG_IGN);
#ifdef SIGWINCH
signal(SIGWINCH, SIG_IGN);
#endif
signal(SIGCHLD, SIG_DFL);
signal(SIGFPE, sig_fpe);
#if SYSLOG_LOGGING
openlog("maildrop", LOG_PID, LOG_MAIL);
#endif
try
{
int r=(*func)(argc, argv);
cleanup();
return (r);
}
catch (const char *p)
{
merr << argv[0] << ": " << p << "\n";
#if SYSLOG_LOGGING
syslog(LOG_INFO, "%s", p);
#endif
cleanup();
return (EX_TEMPFAIL);
}
#if NEED_NONCONST_EXCEPTIONS
catch (char *p)
{
merr << argv[0] << ": " << p << "\n";
#if SYSLOG_LOGGING
syslog(LOG_INFO, "%s", p);
#endif
cleanup();
return (EX_TEMPFAIL);
}
#endif
catch (int n)
{
cleanup();
return (n);
}
catch (...)
{
merr << argv[0] << ": Internal error.\n";
#if SYSLOG_LOGGING
syslog(LOG_INFO, "Internal error.");
#endif
cleanup();
return (EX_TEMPFAIL);
}
}
|
