
  Special Variables <a class="group-link" href="chap-special-var.html">special-var</a>


  [POSIX Special] $@  $*  $#     $?  $-     $$  $!   $0  $9
  [Shell Vars]    IFS             X LANG       X GLOBIGNORE
  [Shell Options] SHELLOPTS       X BASHOPTS
  [Other Env]     HOME              PATH
  [Other Special] BASH_REMATCH     @PIPESTATUS
  [Platform]      HOSTNAME          OSTYPE
  [Call Stack]    @BASH_SOURCE     @FUNCNAME    @BASH_LINENO   
                X @BASH_ARGV     X @BASH_ARGC
  [Tracing]       LINENO
  [Process State] UID               EUID         PPID       X BASHPID
X [Process Stack] BASH_SUBSHELL     SHLVL
X [Shell State]   BASH_CMDS        @DIRSTACK
  [Completion]   @COMP_WORDS        COMP_CWORD    COMP_LINE   COMP_POINT
                  COMP_WORDBREAKS  @COMPREPLY   X COMP_KEY
                X COMP_TYPE         COMP_ARGV
  [History]       HISTFILE
  [cd]            PWD               OLDPWD      X CDPATH
  [getopts]       OPTIND            OPTARG      X OPTERR
  [read]          REPLY
  [Functions]   X RANDOM            SECONDS
  [Oils VM]       OILS_VERSION      LIB_OSH
