int main() {
char *msg;
char *mypid;
int n;
msg = malloc(MAXMSGLEN);
mypid = malloc(MAXPIDLEN);
sprintf(mypid," #%d",getpid());
write(STDOUT_FILENO, mypid, strlen(mypid));
write(STDOUT_FILENO, "\n", 1);
write(STDERR_FILENO, "wypisalem\n",sizeof("wypisalem\n"));
while(1) {
n = read(STDIN_FILENO, msg, MAXMSGLEN);
if(n == -1)
myErr(3,"Błąd odczytu z stdin");
if(!n)
exit(0);
if(n>0)
msg[n-1] = 0; /*usuwamy \n z końca wiersza*/
if(!strstr(msg,mypid)) { /*nie ma na liście*/
strcat(msg,mypid);
write(STDOUT_FILENO, msg, strlen(msg));
write(STDOUT_FILENO, "\n", 1);
} else { /*jest na liście*/
write(STDERR_FILENO, msg, strlen(msg));
write(STDERR_FILENO, "\n", 3);
}
}
return 0;
}
bool SysfsGPIO::configureGPIO(GPIO_Pin gpionr, QString direction)
{
//First check that the export file is there,
//if it is missing then the sysfs gpio "module" is not loaded.
QFile gpioExport("/sys/class/gpio/export");
if(!gpioExport.exists())
{
myErr() << "missing file: /sys/class/gpio/export";
return false;
}
//If value does not exist then export
QFile gpioDirection(QString("/sys/class/gpio/gpio%1/direction").arg(gpionr));
if(!gpioDirection.exists())
{
//myOut() << gpioDirection.fileName();
if (!gpioExport.open(QIODevice::WriteOnly | QIODevice::Text))
{
myErr() << gpioExport.fileName();
return false;
}
QTextStream out(&gpioExport);
out << gpionr << "\n";
gpioExport.close();
sleep(1);
}
{
if (!gpioDirection.open(QIODevice::WriteOnly | QIODevice::Text))
{
myErr() << gpioDirection.fileName();
return false;
}
QTextStream out(&gpioDirection);
out << direction << "\n";
gpioDirection.close();
}
return true;
}
bool SysfsGPIO::writeGPIO(GPIO_Pin gpionr, GPIO_State value)
{
if(GPIO_UNDEF == value)
{
//What did you plan to do?
return false;
}
//Open and write 1/0 to value file
QFile gpioFile(QString("/sys/class/gpio/gpio%1/value").arg(gpionr));
if (!gpioFile.open(QIODevice::WriteOnly | QIODevice::Text))
{
myErr() << "FAILURE can't open gpio file gpioPath:" << gpioFile.fileName();
return false;
}
QTextStream out(&gpioFile);
out << value << "\n";
gpioFile.close();
return true;
}
