I'm have trouble understanding the sample snmpd-proc.tcl
under the scotty/tnm/agents directory:
proc SNMP_ProcInit {s} {
...
$s bind procReload.0 set {
1 ====> global procReload procID procCmd
2 ====> foreach id [array names proc] {
unset proc($id)
}
catch {unset cmd}
array set cmd [SNMP_GetPS]
foreach pid [array names cmd] {
%S instance procID.$pid proc(id,$pid) $pid
3 ======> %S instance procCmd.$pid proc(cmd,$pid) $cmd($pid)
}
set procReload [DateAndTime]
}
}
1) Does `global' statement actually create the global variable, if
it doesn't already exist? I don't see those three variables
referenced outside the procedure, so I assume they come into
existence when the procedure is called for the first time.
In any case, after calling that proc, I issued the command
% puts $procReload
can't read "procReload": no such variable
So where is procReload?
2) What is `proc'? Is that a _local_ array? I don't see that
referenced outside of the above procedure. If it were local, how
could it be used later on in the `%S instance' command?
3) What is the purpose of `proc(cmd,$pid)'? Does it only serve
as a place holder to keep track of what MIB instance we have
created, so that later we can `unset proc($id)'?
--Q Vincent Yin | Repeat vyin@cs.ubc.ca | delete(next->bug); (604) 876-9096 (H) | Until 0 = 1;
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