C++ DEVICE::get_file方法代码示例

/* Write session label
 *  Returns: false on failure
 *           true  on success
 */
bool write_session_label(DCR *dcr, int label)
{
   JCR *jcr = dcr->jcr;
   DEVICE *dev = dcr->dev;
   DEV_RECORD *rec;
   DEV_BLOCK *block = dcr->block;
   char buf1[100], buf2[100];

   rec = new_record();
   Dmsg1(130, "session_label record=%x\n", rec);
   switch (label) {
   case SOS_LABEL:
      set_start_vol_position(dcr);
      break;
   case EOS_LABEL:
      if (dev->is_tape()) {
         dcr->EndBlock = dev->EndBlock;
         dcr->EndFile  = dev->EndFile;
      } else {
         dcr->EndBlock = (uint32_t)dev->file_addr;
         dcr->EndFile = (uint32_t)(dev->file_addr >> 32);
      }
      break;
   default:
      Jmsg1(jcr, M_ABORT, 0, _("Bad Volume session label = %d\n"), label);
      break;
   }
   create_session_label(dcr, rec, label);
   rec->FileIndex = label;

   /*
    * We guarantee that the session record can totally fit
    *  into a block. If not, write the block, and put it in
    *  the next block. Having the sesssion record totally in
    *  one block makes reading them much easier (no need to
    *  read the next block).
    */
   if (!can_write_record_to_block(block, rec)) {
      Dmsg0(150, "Cannot write session label to block.\n");
      if (!dcr->write_block_to_device()) {
         Dmsg0(130, "Got session label write_block_to_dev error.\n");
         free_record(rec);
         return false;
      }
   }
   if (!write_record_to_block(dcr, rec)) {
      free_record(rec);
      return false;
   }

   Dmsg6(150, "Write sesson_label record JobId=%d FI=%s SessId=%d Strm=%s len=%d "
             "remainder=%d\n", jcr->JobId,
      FI_to_ascii(buf1, rec->FileIndex), rec->VolSessionId,
      stream_to_ascii(buf2, rec->Stream, rec->FileIndex), rec->data_len,
      rec->remainder);

   free_record(rec);
   Dmsg2(150, "Leave write_session_label Block=%ud File=%ud\n",
      dev->get_block_num(), dev->get_file());
   return true;
}

/*
 * This job is done, so release the device. From a Unix standpoint,
 *  the device remains open.
 *
 * Note, if we were spooling, we may enter with the device blocked.
 *   We unblock at the end, only if it was us who blocked the
 *   device.
 *
 */
bool release_device(DCR *dcr)
{
   JCR *jcr = dcr->jcr;
   DEVICE *dev = dcr->dev;
   bool ok = true;
   char tbuf[100];
   int was_blocked = BST_NOT_BLOCKED;


   dev->Lock();
   if (!dev->is_blocked()) {
      block_device(dev, BST_RELEASING);
   } else {
      was_blocked = dev->blocked();
      dev->set_blocked(BST_RELEASING);
   }
   lock_volumes();
   Dmsg2(100, "release_device device %s is %s\n", dev->print_name(), dev->is_tape()?"tape":"disk");

   /* if device is reserved, job never started, so release the reserve here */
   dcr->clear_reserved();

   if (dev->can_read()) {
      VOLUME_CAT_INFO *vol = &dev->VolCatInfo;
      generate_plugin_event(jcr, bsdEventDeviceClose, dcr);
      dev->clear_read();              /* clear read bit */
      Dmsg2(150, "dir_update_vol_info. label=%d Vol=%s\n",
         dev->is_labeled(), vol->VolCatName);
      if (dev->is_labeled() && vol->VolCatName[0] != 0) {
         dir_update_volume_info(dcr, false, false); /* send Volume info to Director */
         remove_read_volume(jcr, dcr->VolumeName);
         volume_unused(dcr);
      }
   } else if (dev->num_writers > 0) {
      /*
       * Note if WEOT is set, we are at the end of the tape
       *   and may not be positioned correctly, so the
       *   job_media_record and update_vol_info have already been
       *   done, which means we skip them here.
       */
      dev->num_writers--;
      Dmsg1(100, "There are %d writers in release_device\n", dev->num_writers);
      if (dev->is_labeled()) {
         Dmsg2(200, "dir_create_jobmedia. Release vol=%s dev=%s\n",
               dev->getVolCatName(), dev->print_name());
         if (!dev->at_weot() && !dir_create_jobmedia_record(dcr)) {
            Jmsg2(jcr, M_FATAL, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
               dcr->getVolCatName(), jcr->Job);
         }
         /* If no more writers, and no errors, and wrote something, write an EOF */
         if (!dev->num_writers && dev->can_write() && dev->block_num > 0) {
            dev->weof(1);
            write_ansi_ibm_labels(dcr, ANSI_EOF_LABEL, dev->VolHdr.VolumeName);
         }
         if (!dev->at_weot()) {
            dev->VolCatInfo.VolCatFiles = dev->get_file();   /* set number of files */
            /* Note! do volume update before close, which zaps VolCatInfo */
            dir_update_volume_info(dcr, false, false); /* send Volume info to Director */
            Dmsg2(200, "dir_update_vol_info. Release vol=%s dev=%s\n",
                  dev->getVolCatName(), dev->print_name());
         }
         if (dev->num_writers == 0) {         /* if not being used */
            volume_unused(dcr);               /*  we obviously are not using the volume */
            generate_plugin_event(jcr, bsdEventDeviceClose, dcr);
         }
      }

   } else {
      /*
       * If we reach here, it is most likely because the job
       *   has failed, since the device is not in read mode and
       *   there are no writers. It was probably reserved.
       */
      volume_unused(dcr);
      generate_plugin_event(jcr, bsdEventDeviceClose, dcr);
   }
   Dmsg3(100, "%d writers, %d reserve, dev=%s\n", dev->num_writers, dev->num_reserved(),
         dev->print_name());

   /* If no writers, close if file or !CAP_ALWAYS_OPEN */
   if (dev->num_writers == 0 && (!dev->is_tape() || !dev->has_cap(CAP_ALWAYSOPEN))) {
      generate_plugin_event(jcr, bsdEventDeviceClose, dcr);
      if (!dev->close()) {
         Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
      }
      free_volume(dev);
   }
   unlock_volumes();

   /* Fire off Alert command and include any output */
   if (!job_canceled(jcr) && dcr->device->alert_command) {
//.........这里部分代码省略.........