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[/] [or1k/] [trunk/] [newlib-1.10.0/] [newlib/] [libc/] [stdio/] [fileno.c] - Rev 1765

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/*
FUNCTION
<<fileno>>---return file descriptor associated with stream
 
INDEX
	fileno
 
ANSI_SYNOPSIS
	#include <stdio.h>
	int fileno(FILE *<[fp]>);
 
TRAD_SYNOPSIS
	#include <stdio.h>
	int fileno(<[fp]>)
	FILE *<[fp]>;
 
DESCRIPTION
You can use <<fileno>> to return the file descriptor identified by <[fp]>.
 
RETURNS
<<fileno>> returns a non-negative integer when successful.
If <[fp]> is not an open stream, <<fileno>> returns -1.
 
PORTABILITY
<<fileno>> is not part of ANSI C.
POSIX requires <<fileno>>.
 
Supporting OS subroutines required: none.
*/
 
#include <stdio.h>
#include "local.h"
 
int
_DEFUN (fileno, (f),
	FILE * f)
{
  CHECK_INIT (f);
  return __sfileno (f);
}
 

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