How to open a device for exclusive access?

[Bill Ricker]

> ops in question, and you can store info (like your server's PID)
> in the files so created to help you handle the unclean-exit cases.

right -- you can auto-cleanup old lockfiles if contents are pid of the
creating process and /proc/$pid doesn't exist when server restarts.

Only if some OTHER process is holding that PID after a reboot or such
is a stale lockfile a problem for manual intervention. And in that
case, if lockfile is older than UPTIME, can't be yours, poof

-- 
Bill
n1vux at arrl.net bill.n1vux at gmail.com