Messages in this thread | | | Subject | Re: RFC: reject unknown open flags | From | Paul Eggert <> | Date | Thu, 30 Mar 2017 12:02:04 -0700 |
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On 03/30/2017 11:19 AM, Linus Torvalds wrote: > like "dd" growing an atomic flag and setting it on stdout),
'dd' typically assumes that if a flag O_FOO is not #defined by <fcntl.h>, then 'dd' can "#define O_FOO 0" and the rest of dd's code can assume O_FOO works "well enough" on older systems. I hope this backward-compatibility hack will suffice for O_ATOMIC too.
> I'm assuming you'd also possible want to be able to use F_SETFL to set > O_ATOMIC after the fact
Just for fun, one thread can set O_ATOMIC at the same time another thread is doing a 'write'....
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