/*
    * Copyright 2020-2022 The OSHI Project Contributors
    * SPDX-License-Identifier: MIT
    */
   package oshi.driver.unix.solaris.disk;
   
   import java.util.HashMap;
   import java.util.List;
   import java.util.Map;
  
  import oshi.annotation.concurrent.ThreadSafe;
  import oshi.util.ExecutingCommand;
  import oshi.util.ParseUtil;
  
  /**
   * Utility to query lshal
   */
  @ThreadSafe
  public final class Lshal {
  
      private static final String LSHAL_CMD = "lshal";
  
      private Lshal() {
      }
  
      /**
       * Query lshal to get device major
       *
       * @return A map with disk names as the key and block device major as the value if lshal is installed; empty map
       *         otherwise
       */
      public static Map<String, Integer> queryDiskToMajorMap() {
          Map<String, Integer> majorMap = new HashMap<>();
          List<String> lshal = ExecutingCommand.runNative(LSHAL_CMD);
          String diskName = null;
          for (String line : lshal) {
              if (line.startsWith("udi ")) {
                  String udi = ParseUtil.getSingleQuoteStringValue(line);
                  diskName = udi.substring(udi.lastIndexOf('/') + 1);
              } else {
                  line = line.trim();
                  if (line.startsWith("block.major") && diskName != null) {
                      majorMap.put(diskName, ParseUtil.getFirstIntValue(line));
                  }
              }
          }
          return majorMap;
      }
  }