10.0;xon, revision 1.0, 88/01/21
xon - activate the shell's -x flag.
usage: xon
DESCRIPTION
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 an 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.
SEE ALSO
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