#!/bin/bash
#.Y / 70 83 / / / / 105 / / / /	 / /	      ;A4_QUER.Y
#.YT 3 2 0 0 3 3 1 / / /
#.H!a!0:linux/<scripts>/memory/THIS!0.!c
#
# copyright : (C) 2009 by Thomas Bruecker =: tbrue
# email     : public0x05bf@bluewin.ch
#
# tbrue 30sep2011
#
# memory THIS : memory-functions
#+++++++++++++++++++++++++++++++
#
# MyHash("linux/<scripts>/memory/THIS") = ^0x0XXX
#
# * for every function:
#   * if returned result is not commented, the function returns 0 on no-error.
#

# temp:
  SCRIPTS=root/bin

memory_FreeCache()
  # * $1 in { "All", "Metadata", "Page" } :
  #   * "All"     : free page-, dentry- and inode-caches,
  #   * "Metadata": free dentry- and inode-caches,
  #   * "Page"    : free pagecache;
  # * returns
  #   0 if ok,
  #   1 if wrong parameter for $1 .
  {
    local CmdParameter0x0XXX
      # see "<kernel-source>/Documentation/sysctl/vm.txt::drop_caches".

    case "$1" in
        All)
            CmdParameter0x0XXX=3
          ;;
        Metadata)
            CmdParameter0x0XXX=2
          ;;
        Page)
            CmdParameter0x0XXX=1
          ;;
        *)
           echo "Usage: \"MEMORY_ FreeCache All | Metadata | Page\"."
           return 1
      esac

    sync
      # see "<kernel-source>/Documentation/sysctl/vm.txt::drop_caches".
    echo "$CmdParameter0x0XXX" > "/proc/sys/vm/drop_caches"
    return 0
  }