DIRFD(3)

NAME
dirfd - get directory stream file descriptor

SYNOPSIS
#include <sys/types.h>
#include <dirent.h>

int dirfd(DIR *dir);

DESCRIPTION
The function dirfd() returns the file descriptor associated with the directory stream dir.

ERRORS
On error -1 is returned.

NOTES
The prototype for dirfd is only available if _BSD_SOURCE or _SVID_SOURCE is defined (either explicitly, or implicitly, by not defining _POSIX_SOURCE or compiling with the -ansi flag).

CONFORMING TO
This is a BSD extension, present in 4.3BSD-Reno, not in 4.2BSD. Present in libc5 (since 5.1.2) and in glibc2.

SEE ALSO
open(2), closedir(3), opendir(3), readdir(3), rewinddir(3), scandir(3), seekdir(3), telldir(3)