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_fileno

Header File

stdio.h

Category

Input/output Routines

Prototype

int _fileno(FILE *stream);

Description

Gets the file handle.

_fileno is a macro that returns the file handle for the given stream. If stream has more than one handle _fileno returns the handle assigned to the stream when it was first opened.

Return Value

_fileno returns the integer file handle associated with stream.

Example

Copy Code

    #include <stdio.h>
    int main(void)
    {
       FILE *stream;
       int handle;
       /* create a file */
       stream = fopen("DUMMY.FIL", "w");
       /* obtain the file handle associated with the stream */
       handle = fileno(stream);
       /* display the handle number */
       printf("handle number: %d\n", handle);
       /* close the file */
       fclose(stream);
       return 0;
    }

Portability

POSIX | Win32 | ANSI C | ANSI C++
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