Re: fseeko / ftello missing info

Re: fseeko / ftello missing info

[Michael Kerrisk (man-pages)]

On 09/26/2014 04:36 PM, Thomas Mack wrote:
> Hi!
> 
> On the ftello / fseeko man pages, it is written that #define
> _FILE_OFFSET_BITS 64 will turn off_t into a 64 bit type.
> 
> As we had some harder time finding a solution for a problem related
> to this, it should be mentioned on the man page that this definition
> has to appear before including (any?) standard libraries.
> 
> My system: Ubuntu 14.04.1; the man page states a date of 2001-11-05

Hello Thomas,

I made the text

       On some architectures, both off_t and long are 32-bit types,  but
       defining  _FILE_OFFSET_BITS  with  the value 64 (before including
       any header files) will turn off_t into a 64-bit type.

Thanks for your note.
 
> Thank you for all your good work!

Bitteschön!

Cheers,

Michael


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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