> I'd rather see a generic "wrap and lock" utility, much like env(1),

I already have a utility that's like cat except it does
open/write/close for each input line - it's intended to write to logs
you want to be able to logfile-rotate without troubles, for those times
when you don't (for whatever reason) want to use syslog.  (Actually,
there are optimizations - if multiple input lines are avaialble, it
will open/write/close once for all the complete lines it has.)  It'd be
easy to add locking to it, and if NetBSD would like a copy you'd be
welcome to one.

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