[b>d>>s]

i need some help on this,

i want to lock a file while im working on it via a itcl script, of which there will be multiple instances of zs trying to access it (so theyll need to check access, etc.).

so i do:
resource +lock "filename" ; set $filename [open $file w]

?

then -unlock "filename" on exit. ?


any help plz :/