[RndTbl] Korn shell script debugging

Gilbert E. Detillieux gedetil at cs.umanitoba.ca
Fri Jan 3 15:39:55 CST 2014

On 2014-01-03 15:19, Kevin McGregor wrote:
> I've got a Korn shell script which I'm trying to debug with the aid of
> the "-x" switch, and it works for a while (i.e. as the script executes)
> until a function is called, then the shell stops displaying the commands
> as it executes. When the function returns, the commands are displayed again.
> How do I get it to display commands for the entire script?

A quick Google search for "korn shell xtrace stops working within 
functions" came up with this page...


... wherein it states...

"When set at the global level, the xtrace option applies to the main 
script and to any POSIX-style functions (those created with the name () 
syntax). If the code you are trying to debug calls function-style 
functions that are defined elsewhere (e.g., in your .profile or 
environment file), you can trace through these in the same way with an 
option to the typeset command. Just enter the command typeset -ft 
functname, and the named function will be traced whenever it runs. Type 
typeset +ft functname to turn tracing off. You can also put set -o 
xtrace into the function body itself, which is good when the function is 
within the script being debugged."

This behaviour may be different in different implementations of ksh, 


Gilbert E. Detillieux		E-mail: <gedetil at muug.mb.ca>
Manitoba UNIX User Group	Web:	http://www.muug.mb.ca/
PO Box 130 St-Boniface		Phone:  (204)474-8161
Winnipeg MB CANADA  R2H 3B4	Fax:    (204)474-7609

More information about the Roundtable mailing list