From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Sat,  7 Feb 1998 21:01:51 -0500
From: Rob Pike rob@plan9.bell-labs.com
Subject: [9fans] create(2)/open(2) race for file creation
Topicbox-Message-UUID: 71d3c8bc-eac8-11e9-9e20-41e7f4b1d025
Message-ID: <19980208020151.eFMENoW2IPDWR9gqo658tkAuqFCNBaV5DhDvfSr1TAE@z>

Am I missing something?   If everyone does create(file, OWRITE, 000)
only one process can succeed.   Perm==0 means no one can read or
write the file; if you want one writer, many readers, 004 will do.

In other words, it's a create/open race, so don't run that race.

-rob