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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/*
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 2005-2008
*/
/**
*
* @file thread.c
* @brief thread stuff...
* @author Simone Fedele
*
*/
#include "sesman.h"
#include <errno.h>
#include <signal.h>
#include <pthread.h>
extern struct config_sesman* g_cfg; /* in sesman.c */
static pthread_t g_thread_sighandler;
//static pthread_t g_thread_updater;
/* a variable to pass the socket of s connection to a thread */
int g_thread_sck;
/******************************************************************************/
int DEFAULT_CC
thread_sighandler_start(void)
{
int ret;
sigset_t sigmask;
sigset_t oldmask;
sigset_t waitmask;
/* mask signals to be able to wait for them... */
sigfillset(&sigmask);
pthread_sigmask(SIG_BLOCK, &sigmask, &oldmask);
/* unblock some signals... */
sigemptyset(&waitmask);
/* it is a good idea not to block SIGILL SIGSEGV */
/* SIGFPE -- see sigaction(2) NOTES */
sigaddset(&waitmask, SIGILL);
sigaddset(&waitmask, SIGSEGV);
sigaddset(&waitmask, SIGFPE);
pthread_sigmask(SIG_UNBLOCK, &waitmask, NULL);
log_message(&(g_cfg->log), LOG_LEVEL_INFO,"starting signal handling thread...");
ret = pthread_create(&g_thread_sighandler, NULL, sig_handler_thread, "");
pthread_detach(g_thread_sighandler);
if (ret == 0)
{
log_message(&(g_cfg->log), LOG_LEVEL_INFO, "signal handler thread started successfully");
return 0;
}
/* if something happened while starting a new thread... */
switch (ret)
{
case EINVAL:
log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "invalid attributes for signal handling thread (creation returned EINVAL)");
break;
case EAGAIN:
log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "not enough resources to start signal handling thread (creation returned EAGAIN)");
break;
case EPERM:
log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "invalid permissions for signal handling thread (creation returned EPERM)");
break;
default:
log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "unknown error starting signal handling thread");
}
return 1;
}
#ifdef JUST_TO_AVOID_COMPILER_ERRORS
/******************************************************************************/
int DEFAULT_CC
thread_session_update_start(void)
{
int ret;
//starts the session update thread
//that checks for idle time, destroys sessions, ecc...
#warning this thread should always request lock_fork before read or write
#warning (so we can Fork() In Peace)
ret = pthread_create(&g_thread_updater, NULL, , "");
pthread_detach(g_thread_updater);
if (ret==0)
{
log_message(&(g_cfg->log), LOG_LEVEL_INFO, "session update thread started successfully");
return 0;
}
/* if something happened while starting a new thread... */
switch (ret)
{
case EINVAL:
log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "invalid attributes for session update thread (creation returned EINVAL)");
break;
case EAGAIN:
log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "not enough resources to start session update thread (creation returned EAGAIN)");
break;
case EPERM:
log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "invalid permissions for session update thread (creation returned EPERM)");
break;
default:
log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "unknown error starting session update thread");
}
return 1;
}
#endif
/******************************************************************************/
int DEFAULT_CC
thread_scp_start(int skt)
{
int ret;
pthread_t th;
/* blocking the use of thread_skt */
lock_socket_acquire();
g_thread_sck = skt;
/* start a thread that processes a connection */
ret = pthread_create(&th, NULL, scp_process_start, "");
//ret = pthread_create(&th, NULL, scp_process_start, (void*) (&g_thread_sck));
pthread_detach(th);
if (ret == 0)
{
log_message(&(g_cfg->log), LOG_LEVEL_INFO, "scp thread on sck %d started successfully", skt);
return 0;
}
/* if something happened while starting a new thread... */
switch (ret)
{
case EINVAL:
log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "invalid attributes for scp thread on sck %d (creation returned EINVAL)", skt);
break;
case EAGAIN:
log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "not enough resources to start scp thread on sck %d (creation returned EAGAIN)", skt);
break;
case EPERM:
log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "invalid permissions for scp thread on sck %d (creation returned EPERM)", skt);
break;
default:
log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "unknown error starting scp thread on sck %d");
}
return 1;
}
|