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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/* $Id$
* Bluetooth serial forwarder class implementation
*
* (c) Copyright 2006 GPL
*
* This software is provided under the GNU public license, incorporated
* herein by reference. The software is provided without warranty or
* support.
*/
#include "bt-serial.h"
#include <sys/types.h>
#include <sys/wait.h>
#include <errno.h>
#include <stdlib.h>
#include <fcntl.h>
#include <qapplication.h>
#include <opie2/oprocctrl.h>
#include "forwarder.h"
using namespace OpieTooth;
using namespace Opie::Core;
using namespace Opie::Core::Internal;
SerialForwarder::SerialForwarder(QString& devName, int dspeed) :
OProcess(), device(devName), speed(dspeed)
{
status = false;
}
SerialForwarder::~SerialForwarder()
{
stop();
}
bool SerialForwarder::start(RunMode runmode, Communication comm)
{
int htmp; //temporary device
int result; //call result
if ( runs )
{
return false; // cannot start a process that is already running
// or if no executable has been assigned
}
//First, check if serial device is usable
htmp = ::openSerial(device);
if (htmp < 0)
return false;
close(htmp);
run_mode = runmode;
status = 0;
if(::bt_serialStart() < 0)
return false;
if ( !setupCommunication( comm ) )
qWarning( "Could not setup Communication!" );
// We do this in the parent because if we do it in the child process
// gdb gets confused when the application runs from gdb.
uid_t uid = getuid();
gid_t gid = getgid();
#ifdef HAVE_INITGROUPS
struct passwd *pw = getpwuid( uid );
#endif
int fd[ 2 ];
if ( 0 > pipe( fd ) )
{
fd[ 0 ] = fd[ 1 ] = 0; // Pipe failed.. continue
}
runs = true;
QApplication::flushX();
// WABA: Note that we use fork() and not vfork() because
// vfork() has unclear semantics and is not standardized.
pid_ = fork();
if ( 0 == pid_ )
{
if ( fd[ 0 ] )
close( fd[ 0 ] );
if ( !runPrivileged() )
{
setgid( gid );
#if defined( HAVE_INITGROUPS)
if ( pw )
initgroups( pw->pw_name, pw->pw_gid );
#endif
setuid( uid );
}
// The child process
if ( !commSetupDoneC() )
qWarning( "Could not finish comm setup in child!" );
setupEnvironment();
// Matthias
if ( run_mode == DontCare )
setpgid( 0, 0 );
// restore default SIGPIPE handler (Harri)
struct sigaction act;
sigemptyset( &( act.sa_mask ) );
sigaddset( &( act.sa_mask ), SIGPIPE );
act.sa_handler = SIG_DFL;
act.sa_flags = 0;
sigaction( SIGPIPE, &act, 0L );
// We set the close on exec flag.
// Closing of fd[1] indicates that the execvp succeeded!
if ( fd[ 1 ] )
fcntl( fd[ 1 ], F_SETFD, FD_CLOEXEC );
do {
BTSerialConn conn; //Connection handler
if ( fd[ 1 ] ) {
::close(fd[1]);
fd[1] = 0;
}
result = ::bt_serialForward(&conn, device);
} while(result == 0);
char resultByte = 1;
if ( fd[ 1 ] )
write( fd[ 1 ], &resultByte, 1 );
_exit( -1 );
}
else if ( -1 == pid_ )
{
// forking failed
runs = false;
return false;
}
else
{
if ( fd[ 1 ] )
close( fd[ 1 ] );
// the parent continues here
// Discard any data for stdin that might still be there
input_data = 0;
// Check whether client could be started.
if ( fd[ 0 ] )
for ( ;; )
{
char resultByte;
int n = ::read( fd[ 0 ], &resultByte, 1 );
if ( n == 1 )
{
// Error
runs = false;
close( fd[ 0 ] );
pid_ = 0;
return false;
}
if ( n == -1 )
{
if ( ( errno == ECHILD ) || ( errno == EINTR ) )
continue; // Ignore
}
break; // success
}
if ( fd[ 0 ] )
close( fd[ 0 ] );
if ( !commSetupDoneP() ) // finish communication socket setup for the parent
qWarning( "Could not finish comm setup in parent!" );
if ( run_mode == Block )
{
commClose();
// The SIGCHLD handler of the process controller will catch
// the exit and set the status
while ( runs )
{
OProcessController::theOProcessController->
slotDoHousekeeping( 0 );
}
runs = FALSE;
emit processExited( this );
}
}
return true;
}
/*
* Stop forwarding process
*/
int SerialForwarder::stop()
{
kill(SIGTERM);
::bt_serialStop();
return 0;
}
//eof
|
