GNU/Linux man pages
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GNU/Linux |
CentOS 5.5 |
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dirfd(3) |
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dirfd − get directory stream file descriptor
#include
<sys/types.h>
#include <dirent.h>
int dirfd(DIR *dir);
The function dirfd() returns the file descriptor associated with the directory stream dir.
This descriptor is the one used internally by the directory stream. As a result, it is only useful for functions which do not depend on or alter the file position, such as fstat(2) and fchdir(2). It will be automatically closed when closedir(3) is called.
On error −1 is returned.
The prototype for dirfd() is only available if _BSD_SOURCE or _SVID_SOURCE is defined.
This is a BSD extension, present in 4.3BSD-Reno, not in 4.2BSD. It is present in libc5 (since 5.1.2) and in glibc2. This function is under consideration for inclusion in a future version of POSIX.1.
open(2), closedir(3), opendir(3), readdir(3), rewinddir(3), scandir(3), seekdir(3), telldir(3)
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dirfd(3) | |