xon — Apollo

4.0;xon, revision 4.0, 82/03/31
XON -- Activate the Shell's -X flag.
usage:  XON


FORMAT

  XON


  XON turns on execution tracing. Just before each command is executed, its full
  pathname and arguments are written to the error output stream of the Shell. In
  Shell  scripts, XON can be used to show the progress being made by the script,
  and can help debug Shell scripts by showing the actual arguments being  passed
  to commands, after all Shell processing on them is complete.

  By default, execution tracing is off when a Shell is invoked.

  If  XON  is turned on in a Shell script, it remains on until that Shell script
  exits, or until over-ridden by a XOFF in a nested Shell script. When  a  Shell
  script  exits,  the  state  of  execution  tracing is returned to the state in
  effect just before the script was invoked.

  XON requires no arguments or options.


RELATED TOPICS

  More information is available.  Type:

  - HELP XOFF
    for details about turning execution tracing off.

  - HELP SH
    for details about the Shell command line interpreter.

  - HELP SHELL
    for general Shell information.
Museum

Related Articles
