Is this guaranteed to be atomic on all filesystems? | Hacker News

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		acuozzo 34 days ago \| parent \| context \| favorite \| on: Everything you never wanted to know about file loc... Is this guaranteed to be atomic on all filesystems?

chasil 34 days ago | [–]

For POSIX, yes.

https://rcrowley.org/2010/01/06/things-unix-can-do-atomicall...

Windows has a deep well of POSIX in the kernel (plus hard file locks), and it appears to hold there.

https://en.wikipedia.org/wiki/Microsoft_POSIX_subsystem

elteto 34 days ago | [–]

It’s even atomic on NFS. In fact, it’s probably the only reliable locking mechanism on NFS.

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