/*
    * Copyright 2020-2022 The OSHI Project Contributors
    * SPDX-License-Identifier: MIT
    */
   package oshi.driver.unix.freebsd.disk;
   
   import java.util.HashMap;
   import java.util.Map;
   import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import oshi.annotation.concurrent.ThreadSafe;
  import oshi.util.ExecutingCommand;
  
  /**
   * Utility to query mount
   */
  @ThreadSafe
  public final class Mount {
  
      private static final String MOUNT_CMD = "mount";
      private static final Pattern MOUNT_PATTERN = Pattern.compile("/dev/(\\S+p\\d+) on (\\S+) .*");
  
      private Mount() {
      }
  
      /**
       * Query mount to map partitions to mount points
       *
       * @return A map with partitions as the key and mount points as the value
       */
      public static Map<String, String> queryPartitionToMountMap() {
          // Parse 'mount' to map partitions to mount point
          Map<String, String> mountMap = new HashMap<>();
          for (String mnt : ExecutingCommand.runNative(MOUNT_CMD)) {
              Matcher m = MOUNT_PATTERN.matcher(mnt);
              if (m.matches()) {
                  mountMap.put(m.group(1), m.group(2));
              }
          }
          return mountMap;
      }
  }