Tracing Tcl Set Command Operations: Example; Additional References - Cisco ASR 9000 Serie Configuration Manuals

Tracing Tcl set Command Operations: Example

Tracing Tcl set Command Operations: Example
Tcl is a flexible language. One of the flexible aspects of Tcl is that you can override commands. In this
example, the Tcl set command is renamed as _set, and a new version of the set command is created that
displays a message containing the text "setting" and appends the scalar variable that is being set. This example
can be used to trace all instances of scalar variables being set.
rename set _set
proc set {var args} {
puts [list setting $var $args]
uplevel _set $var $args
};
When this is placed in a policy, a message is displayed anytime a scalar variable is set,
for example:
02:17:58: sl_intf_down.tcl[0]: setting test_var 1

Additional References

The following sections provide references related to configuring and managing Embedded Event Manager
policies.
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