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#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/wait.h>
#include "rfcommhelper.h"
using namespace OpieTooth;
bool RfCommHelper::terminate = false;
pid_t RfCommHelper::m_pid;
RfCommHelper::RfCommHelper()
: m_connected( false )
{
signal( SIGCHLD, signal_handler );
}
RfCommHelper::~RfCommHelper() {
detach();
}
QCString RfCommHelper::attachedDevice() const {
return m_device;
}
void RfCommHelper::detach() {
if (m_connected )
::kill( m_pid, 9 );
if ( m_in2out[0] )
close(m_in2out[0] );
if ( m_in2out[1] )
close(m_in2out[1] );
if ( m_out2in[0] )
close(m_out2in[0] );
if ( m_out2in[1] )
close(m_out2in[1] );
}
bool RfCommHelper::attach( const QString& bd_addr, int port ) {
int i = 0;
bool ok = false;
for (i = 0; i < 5 && !ok; i++) {
ok = connect( i, bd_addr, port );
}
return ok;
}
/*
* not implemented yet
*/
void RfCommHelper::regroup() {
}
bool RfCommHelper::connect(int devi, const QString& bdaddr, int port) {
m_connected = false;
if ( pipe(m_fd) < 0 )
m_fd[0] = m_fd[1] = 0;
if ( pipe(m_in2out) < 0 )
m_in2out[0] = m_in2out[1] = 0;
if ( pipe(m_out2in ) < 0 )
m_out2in[0] = m_out2in[1] = 0;
m_pid = fork();
switch( m_pid ) {
case -1:
return false;
break;
/*
* This is the child code.
* We do some fd work
* and then we'll execlp
* to start it up
*/
case 0:{ // child code
setupComChild();
char por[15];
char dev[15];
sprintf( por, "%d", port );
sprintf( dev, "%d", devi );
execlp( "rfcomm", "rfcomm", "connect", dev, bdaddr.latin1(), por, NULL );
char resultByte = 1;
if ( m_fd[1] )
write(m_fd[1], &resultByte, 1 );
_exit( -1 );
break;
}
/*
* The Parent. We'll first wait for fd[0] to fill
* up.
* Then we will wait for out2in[0] to fill up and then
* we will parse it.
* maybe the signal handler gets it's turn in this case we return
* false
* otheriwse we will parse the Output and either return true
* or false
*/
default: {
if ( m_fd[1] )
close( m_fd[1] );
if ( m_fd[0] ) for (;;) {
char resultByte;
int len;
len = read(m_fd[0], &resultByte, 1 );
if ( len == 1 ) { // it failed to execute
return false;
}
if ( len == -1 )
if ( (errno == ECHILD ) || (errno == EINTR ) )
continue; // the other process is not yet ready?
break;
}
if ( m_fd[0] )
close( m_fd[0] );
terminate = false;
fd_set fds;
struct timeval timeout;
int sel;
while (!terminate ) {
FD_ZERO( &fds );
FD_SET( m_in2out[0], &fds );
timeout.tv_sec = 5;
timeout.tv_usec = 0;
printf("do select\n");
sel = select( m_in2out[0]+1, &fds, NULL, NULL, &timeout );
printf("Check select\n");
if ( sel > 0)
{
if (FD_ISSET(m_in2out[0], &fds ) ) {
char buf[2048];
int len;
buf[0] = 0;
printf("read output\n");
len = read( m_in2out[0], buf, sizeof(buf) );
if ( len > 0 ) {
printf("%s", buf);
QCString string( buf );
if (string.left(9) == "Connected" ) {
m_connected = true;
m_device = m_device.sprintf("/dev/tty%d", devi );
break; // we got connected
};
}
// now parese it
}
} else {// time out
terminate = true;
printf("terminate\n");
}
}
break;
}
}
return !terminate;
}
void RfCommHelper::setupComChild() {
if ( m_fd[0] )
close(m_fd[0]);
if ( m_fd[1] )
fcntl( m_fd[1] , F_SETFD, FD_CLOEXEC);
/* duplicating pipes and making them STDIN and STDOUT
* of the new process
* [0] is for reading
* [1] is for writing
*/
dup2( m_out2in[0], STDIN_FILENO );
dup2( m_in2out[1], STDOUT_FILENO );
};
void RfCommHelper::signal_handler(int) {
int status;
terminate = true;
signal( SIGCHLD, signal_handler );
waitpid( m_pid, &status, WNOHANG );
}
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