scsi-linux.c

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      return(SCSI_ERROR);
    }
  
  memset(buffer, 0, SCSI_OFF + DataBufferLength);
  status = read(pDev[DeviceFD].fd, buffer, SCSI_OFF + DataBufferLength);
  memset(pRequestSense, 0, RequestSenseLength);
  memcpy(pRequestSense, psg_header->sense_buffer, 16);
  
  if ( (status < 0) ||
       (status != (ssize_t)(SCSI_OFF + DataBufferLength)) || 
       (psg_header->result != 0)) 
    { 
      dbprintf(_("SCSI_ExecuteCommand error read \n"));
      dbprintf(_("Status %zd (%zd) %2X\n"), status, SCSI_OFF + DataBufferLength,psg_header->result );
      SCSI_CloseDevice(DeviceFD);
      amfree(buffer);
      return(SCSI_ERROR);
    }

  if (DataBufferLength)
    {
       memcpy(DataBuffer, buffer + SCSI_OFF, DataBufferLength);
    }

  SCSI_CloseDevice(DeviceFD);
  amfree(buffer);
  return(SCSI_OK);
}

#else

static inline int min(int x, int y)
{
  return (x < y ? x : y);
}


static inline int max(int x, int y)
{
  return (x > y ? x : y);
}

int SCSI_OpenDevice(int ip)
{
  int DeviceFD;
  int i;

  if (pDev[ip].inqdone == 0)
    {
      pDev[ip].inqdone = 1;
      if ((DeviceFD = open(pDev[ip].dev, O_RDWR)) >= 0)
        {
          pDev[ip].avail = 1;
          pDev[ip].fd = DeviceFD;
          pDev[ip].SCSI = 0;
          pDev[ip].inquiry = (SCSIInquiry_T *)malloc(INQUIRY_SIZE);
          dbprintf(_("SCSI_OpenDevice : use ioctl interface\n"));
          if (SCSI_Inquiry(ip, pDev[ip].inquiry, (u_char)INQUIRY_SIZE) == 0)
            {
              if (pDev[ip].inquiry->type == TYPE_TAPE || pDev[ip].inquiry->type == TYPE_CHANGER)
                {
                  for (i=0;i < 16 && pDev[ip].inquiry->prod_ident[i] != ' ';i++)
                    pDev[ip].ident[i] = pDev[ip].inquiry->prod_ident[i];
                  pDev[ip].ident[i] = '\0';
                  pDev[ip].SCSI = 1;
                  PrintInquiry(pDev[ip].inquiry);
                  return(1);
                } else {
                  amfree(pDev[ip].inquiry);
                  close(DeviceFD);
                  return(0);
                }
            } else {
              close(DeviceFD);
              amfree(pDev[ip].inquiry);
              pDev[ip].inquiry = NULL;
              return(1);
            }
        }
      return(1); 
    } else {
      if ((DeviceFD = open(pDev[ip].dev, O_RDWR)) >= 0)
        {
          pDev[ip].fd = DeviceFD;
          pDev[ip].devopen = 1;
          return(1);
        } else {
          pDev[ip].devopen = 0;
          return(0);
        }
    }
}

int SCSI_ExecuteCommand(int DeviceFD,
                        Direction_T Direction,
                        CDB_T CDB,
                        int CDB_Length,
                        void *DataBuffer,
                        int DataBufferLength,
                        RequestSense_T *pRequestSense,
                        int RequestSenseLength)
{
  unsigned char *Command;
  int Zero = 0, Result;
 
  if (pDev[DeviceFD].avail == 0)
    {
      return(SCSI_ERROR);
    }

  if (pDev[DeviceFD].devopen == 0)
    {
      if (SCSI_OpenDevice(DeviceFD) == 0)
          return(-1);
    }

  memset(pRequestSense, 0, RequestSenseLength);
  switch (Direction)
    {
    case Input:
      Command = (unsigned char *)
        malloc(8 + max(DataBufferLength, RequestSenseLength));
      memcpy(&Command[0], &Zero, 4);
      memcpy(&Command[4], &DataBufferLength, 4);
      memcpy(&Command[8], CDB, CDB_Length);
      break;
    case Output:
      Command = (unsigned char *)
        malloc(8 + max(CDB_Length + DataBufferLength, RequestSenseLength));
      memcpy(&Command[0], &DataBufferLength, 4);
      memcpy(&Command[4], &Zero, 4);
      memcpy(&Command[8], CDB, CDB_Length);
      memcpy(&Command[8 + CDB_Length], DataBuffer, DataBufferLength);
      break;
    }
  
  DecodeSCSI(CDB, "SCSI_ExecuteCommand : ");
  
  Result = ioctl(pDev[DeviceFD].fd, SCSI_IOCTL_SEND_COMMAND, Command);
  if (Result != 0)
    memcpy(pRequestSense, &Command[8], RequestSenseLength);
  else if (Direction == Input)
    memcpy(DataBuffer, &Command[8], DataBufferLength);
  amfree(Command);
  SCSI_CloseDevice(DeviceFD);

  switch(Result)
    {
      case 0:
        return(SCSI_OK);
        break;
    default:
      return(SCSI_SENSE);
      break;
    }
}
#endif

/*
 * Send the command to the device with the
 * ioctl interface
 */
int Tape_Ioctl( int DeviceFD, int command)
{
  struct mtop mtop;
  int ret = 0;

  if (pDev[DeviceFD].devopen == 0)
    {
      if (SCSI_OpenDevice(DeviceFD) == 0)
          return(-1);
    }

  switch (command)
    {
    case IOCTL_EJECT:
      mtop.mt_op = MTOFFL;
      mtop.mt_count = 1;
      break;
     default:
      break;
    }

  if (ioctl(pDev[DeviceFD].fd , MTIOCTOP, &mtop) != 0)
    {
      dbprintf(_("Tape_Ioctl error ioctl %s\n"),strerror(errno));
      SCSI_CloseDevice(DeviceFD);
      return(-1);
    }

  SCSI_CloseDevice(DeviceFD);
  return(ret);  
}

int Tape_Status( int DeviceFD)
{
  struct mtget mtget;
  int ret = 0;

  memset(&mtget, 0, SIZEOF(mtget));
  if (pDev[DeviceFD].devopen == 0)
    {
      if (SCSI_OpenDevice(DeviceFD) == 0)
          return(-1);
    }

  if (ioctl(pDev[DeviceFD].fd , MTIOCGET, &mtget) != 0)
  {
     DebugPrint(DEBUG_ERROR, SECTION_TAPE,_("Tape_Status error ioctl %s\n"),
		strerror(errno));
     SCSI_CloseDevice(DeviceFD);
     return(-1);
  }

  DebugPrint(DEBUG_INFO, SECTION_TAPE,_("ioctl -> mtget.mt_gstat %lX\n"),mtget.mt_gstat);
  if (GMT_ONLINE(mtget.mt_gstat))
    {
      ret = TAPE_ONLINE;
    }
  
  if (GMT_BOT(mtget.mt_gstat))
    {
      ret = ret | TAPE_BOT;
    }
  
  if (GMT_EOT(mtget.mt_gstat))
    {
      ret = ret | TAPE_EOT;
    }
  
  if (GMT_WR_PROT(mtget.mt_gstat))
    {
      ret = ret | TAPE_WR_PROT;
    }
  
  if (GMT_DR_OPEN(mtget.mt_gstat))
    {
      ret = ret | TAPE_NOT_LOADED;
    }
  
  SCSI_CloseDevice(DeviceFD);
  return(ret); 
}

/*
 * This functions scan all /dev/sg* devices
 * It opens the device an print the result of the inquiry 
 *
 */
int ScanBus(int print)
{
  DIR *dir;
  struct dirent *dirent;
  int count = 0;

  if ((dir = opendir("/dev/")) == NULL)
    {
      dbprintf(_("/dev/ error: %s"), strerror(errno));
      return 0;
    }

  while ((dirent = readdir(dir)) != NULL)
    {
      if (strstr(dirent->d_name, "sg") != NULL)
      {
        pDev[count].dev = malloc(10);
        pDev[count].inqdone = 0;
        g_snprintf(pDev[count].dev, SIZEOF(pDev[count].dev),
	    "/dev/%s", dirent->d_name);
        if (OpenDevice(count,pDev[count].dev, "Scan", NULL ))
          {
            SCSI_CloseDevice(count);
            pDev[count].inqdone = 0;
            
            if (print)
              {
                g_printf(_("name /dev/%s "), dirent->d_name);
                
                switch (pDev[count].inquiry->type)
                  {
                  case TYPE_DISK:
                    g_printf(_("Disk"));
                    break;
                  case TYPE_TAPE:
                    g_printf(_("Tape"));
                    break;
                  case TYPE_PRINTER:
                    g_printf(_("Printer"));
                    break;
                  case TYPE_PROCESSOR:
                    g_printf(_("Processor"));
                    break;
                  case TYPE_WORM:
                    g_printf(_("Worm"));
                    break;
                  case TYPE_CDROM:
                    g_printf(_("Cdrom"));
                    break;
                  case TYPE_SCANNER:
                    g_printf(_("Scanner"));
                    break;
                  case TYPE_OPTICAL:
                    g_printf(_("Optical"));
                    break;
                  case TYPE_CHANGER:
                    g_printf(_("Changer"));
                    break;
                  case TYPE_COMM:
                    g_printf(_("Comm"));
                    break;
                  default:
                    g_printf(_("unknown %d"),pDev[count].inquiry->type);
                    break;
                  }
                g_printf("\n");
              }
            count++;
	    g_printf(_("Count %d\n"),count);
          } else {
            amfree(pDev[count].dev);
            pDev[count].dev=NULL;
          }
      }
    }
  return 0;
}
/*
 * Local variables:
 * indent-tabs-mode: nil
 * c-file-style: gnu
 * End:
 */