blob: d578c3ede2f5951b23cdf0bfb8ba7e348efe9ee0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
/*
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);
}
|
