Usage: ON [#|+|-|^|&|@]EXEC_ERRORS [-|^]<parameters> [action]
This is activated whenever an EXEC'd process produces output
to its standard error channel. The process number is the
number assigned by EXEC to the process (see HELP EXEC). The
parameters to this function are:
$0 The process number that activated the ON
This may also use the process name. (See ON EXEC)
$1- The line of output to stderr
ircii 20190117