file too large

[Alastair Reid]

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man 2 open describes O_LARGEFILE as follows:

O_LARGEFILE: On 32-bit systems that support the Large Files System, allow=20
files whose sizes cannot be  represented in 31 bits to be opened.

I'm slightly puzzled about why you would need to specify this flag. That is=
,=20
why would it not just go ahead and open the file anyway?

My best guess is that you are promising that all indexes into the file will=
 be=20
64 bit (unsigned?) ints and not a 32 bit unsigned int.  In other words, it'=
s=20
a backward compatability feature with a little typechecking thrown in.

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Alastair Reid
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