Sort message with Tclprocs

Hello all,

Before treating messages in HRL format, I must sort them under 3 fields

For instance, i do this with a Unix script

sort -k 1.21,1.60 -k 1.79,1.80 -k 1.61,1.78 $1/$2

I’d like to do that with an inbound Tclprocs

How to to that with tcl ?

With lsort ?

Thanks