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/*
FUNCTION
<<fgetpos>>---record position in a stream or file
 
INDEX
	fgetpos
 
ANSI_SYNOPSIS
	#include <stdio.h>
	int fgetpos(FILE *<[fp]>, fpos_t *<[pos]>);
 
TRAD_SYNOPSIS
	#include <stdio.h>
	int fgetpos(<[fp]>, <[pos]>)
	FILE *<[fp]>;
	fpos_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 <<fgetpos>> to report on the current position for a file
identified by <[fp]>; <<fgetpos>> will write a value
representing that position at <<*<[pos]>>>.  Later, you can
use this value with <<fsetpos>> to return the file to this
position.
 
In the current implementation, <<fgetpos>> simply uses a character
count to represent the file position; this is the same number that
would be returned by <<ftell>>.
 
RETURNS
<<fgetpos>> returns <<0>> when successful.  If <<fgetpos>> fails, the
result is <<1>>.  Failure occurs on streams that do not support
positioning; the global <<errno>> indicates this condition with the
value <<ESPIPE>>.
 
PORTABILITY
<<fgetpos>> is required by the ANSI C standard, but the meaning of the
value it records is not specified beyond requiring that it be
acceptable as an argument to <<fsetpos>>.  In particular, other
conforming C implementations may return a different result from
<<ftell>> than what <<fgetpos>> writes at <<*<[pos]>>>.
 
No supporting OS subroutines are required.
*/
 
#include <stdio.h>
 
int
_DEFUN (fgetpos, (fp, pos),
	FILE * fp _AND
	fpos_t * pos)
{
  *pos = ftell (fp);
 
  if (*pos != -1)
    return 0;
  return 1;
}