[GRASSLIST:7994] ascii vector line format question

[Maciek Sieczka]

Dear All,

Is it a 100% rule, that the line ending is *always* indicated by "1"?

Say like here:

L  12 1
 597230.44979275 5681618.56747334
 597235.81795873 5681608.14691583
 597241.81767366 5681596.14748598
 1     2

I have written a simple awk script for exporting Grass vector into a Surfer 
"blanking file", "BLN" ascii format, which is e.g. used for defining 
elevation faults for interpolation in Surfer. I would like to share it on a 
WIKI, but first I need to make sure if the awk search formula I use:

( (NR > 10) && ($1 == "L") ) {print $2",0"}
( (NR > 10) && ($1 != "L") && ($1 !=1) ) {print $1","$2}

is 100% compatible with any possible Grass ascii line vector file.

Maciek