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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/*
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 of the License, 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; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
xrdp: A Remote Desktop Protocol server.
Copyright (C) Jay Sorg 2005-2006
*/
/**
*
* @file sig.c
* @brief signal handling functions
* @author Jay Sorg, Simone Fedele
*
*/
#include "sesman.h"
#include "signal.h"
extern int g_sck;
extern int g_pid;
extern struct config_sesman g_cfg;
/******************************************************************************/
void DEFAULT_CC
sig_sesman_shutdown(int sig)
{
log_message(LOG_LEVEL_INFO, "shutting down sesman %d", 1);
if (g_getpid() != g_pid)
{
LOG_DBG("g_getpid() [%d] differs from g_pid [%d]", (g_getpid()), g_pid);
return;
}
LOG_DBG(" - getting signal %d pid %d", sig, g_getpid());
g_tcp_close(g_sck);
g_file_delete(SESMAN_PID_FILE);
}
/******************************************************************************/
void DEFAULT_CC
sig_sesman_reload_cfg(int sig)
{
struct config_sesman cfg;
log_message(LOG_LEVEL_WARNING, "receiving SIGHUP %d", 1);
if (g_getpid() != g_pid)
{
LOG_DBG("g_getpid() [%d] differs from g_pid [%d]", g_getpid(), g_pid);
return;
}
if (config_read(&cfg) != 0)
{
log_message(LOG_LEVEL_ERROR, "error reading config - keeping old cfg");
return;
}
g_cfg = cfg;
log_message(LOG_LEVEL_INFO, "configuration reloaded");
}
/******************************************************************************/
void DEFAULT_CC
sig_sesman_session_end(int sig)
{
int pid;
if (g_getpid() != g_pid)
{
return;
}
pid = g_waitchild();
if (pid > 0)
{
session_kill(pid);
}
}
/******************************************************************************/
void* DEFAULT_CC
sig_handler_thread(void* arg)
{
int recv_signal;
sigset_t sigmask;
sigset_t oldmask;
sigset_t waitmask;
/* mask signals to be able to wait for them... */
sigfillset(&sigmask);
/* it is a good idea not to block SIGILL SIGSEGV */
/* SIGFPE -- see sigaction(2) NOTES */
pthread_sigmask(SIG_BLOCK, &sigmask, &oldmask);
/* building the signal wait mask... */
sigemptyset(&waitmask);
sigaddset(&waitmask, SIGHUP);
sigaddset(&waitmask, SIGCHLD);
sigaddset(&waitmask, SIGTERM);
// sigaddset(&waitmask, SIGFPE);
// sigaddset(&waitmask, SIGILL);
// sigaddset(&waitmask, SIGSEGV);
do
{
LOG_DBG("calling sigwait()",0);
sigwait(&waitmask, &recv_signal);
switch (recv_signal)
{
case SIGHUP:
//reload cfg
LOG_DBG("sesman received SIGHUP",0);
//return 0;
break;
case SIGCHLD:
/* a session died */
LOG_DBG("sesman received SIGCHLD",0);
sig_sesman_session_end(SIGCHLD);
break;
/*case SIGKILL;
/ * we die * /
LOG_DBG("sesman received SIGKILL",0);
sig_sesman_shutdown(recv_signal);
break;*/
case SIGTERM:
/* we die */
LOG_DBG("sesman received SIGTERM",0);
sig_sesman_shutdown(recv_signal);
break;
}
} while (1);
return 0;
}
|
