/lib/dvb/frontend.cpp

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RESULT eDVBFrontend::setVoltage(int voltage)
{
   bool increased=false;
   fe_sec_voltage_t vlt;
   m_data[CUR_VOLTAGE]=voltage;
   switch (voltage)
   {
      case voltageOff:
         m_data[CSW]=m_data[UCSW]=m_data[TONEBURST]=-1; // reset diseqc
         vlt = SEC_VOLTAGE_OFF;
+         char filename[256];
+         snprintf(filename, sizeof(filename), "/proc/stb/frontend/%d/active_antenna_power", m_slotid);
+         CFile::writeStr(filename, "off");
         break;
      case voltage13_5:
         increased = true;
      case voltage13:
         vlt = SEC_VOLTAGE_13;
+         if(m_type == feTerrestrial)
+         {
+            char filename[256];
+            snprintf(filename, sizeof(filename), "/proc/stb/frontend/%d/active_antenna_power", m_slotid);
+            CFile::writeStr(filename, "on");
+         }
         break;
      case voltage18_5:
         increased = true;
      case voltage18:
         vlt = SEC_VOLTAGE_18;
         break;
      default:
         return -ENODEV;
   }
   if (m_simulate)
      return 0;
   eDebug("[eDVBFrontend%d] setVoltage FE_ENABLE_HIGH_LNB_VOLTAGE %d FE_SET_VOLTAGE %d", m_dvbid, increased, vlt);
   ::ioctl(m_fd, FE_ENABLE_HIGH_LNB_VOLTAGE, increased);
   return ::ioctl(m_fd, FE_SET_VOLTAGE, vlt);
}

/lib/base/cfile.cpp

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int CFile::writeInt(const char *filename, int value)
{
   CFile f(filename, "w");
   if (!f)
      return -1;
   return fprintf(f, "%d", value);
}

+ int CFile::writeStr(const char *filename, std::string value)
+ {
+   CFile f(filename, "w");
+   if (f)
+      fprintf(f, "%s", value.c_str());
+   return 0;
+ }
+

int CFile::write(const char *filename, const char *value)
{
   CFile f(filename, "w");
   if (!f)
      return -1;
   return fprintf(f, "%s", value);
}

/lib/base/cfile.h

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   static int parseInt(int *result, const char *filename);
   static int writeIntHex(const char *filename, int value);
   static int writeInt(const char *filename, int value);
+   static int writeStr(const char *filename, std::string value);
   static int write(const char *filename, const char *value);
   static std::string read(const std::string &filename);
   static bool contains_word(const std::string &filename, const std::string &word);