fgetpos64 man page on Cygwin

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FGETPOS64(3)			    NEWLIB			  FGETPOS64(3)

NAME
       5.5 `fgetpos64'--record position in a large stream or file

SYNOPSIS
	    #include <stdio.h>
	    int fgetpos64(FILE *FP, _fpos64_t *POS);
	    int _fgetpos64_r(struct _reent *PTR, FILE *FP,
		_fpos64_t *POS);

DESCRIPTION
       Objects	of  type `FILE' can have a "position" that records how much of
       the file your program has already read.	Many of the `stdio'  functions
       depend on this position, and many change it as a side effect.

	  You can use `fgetpos64' to report on the current position for a file
       identified by FP that was opened by `fopen64'; `fgetpos' will  write  a
       value  representing  that  position at `*POS'.  Later, you can use this
       value with `fsetpos64' to return the file to this position.

	  In the current implementation, `fgetpos64' simply uses  a  character
       count  to  represent  the  file	position; this is the same number that
       would be returned by `ftello64'.

RETURNS
       `fgetpos64' returns `0' when successful.	  If  `fgetpos64'  fails,  the
       result is `1'.  Failure occurs on streams that do not support position‐
       ing or streams not opened via `fopen64'; the global  `errno'  indicates
       these conditions with the value `ESPIPE'.

PORTABILITY
       `fgetpos64' is a glibc extension.

	  No supporting OS subroutines are required.

SEE ALSO
       fgetpos64  is part of the library.  The full documentation for is main‐
       tained as a Texinfo manual.  If info and are properly installed at your
       site, the command

	      info

       will give you access to the complete manual.

NEWLIB				  April 2010			  FGETPOS64(3)
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