Name
dirfd — get directory stream file descriptor
DESCRIPTION
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.
ERRORS
On error −1 is returned.
CONFORMING TO
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.
NOTES
The prototype for dirfd
() is
only available if _BSD_SOURCE
or _SVID_SOURCE
is defined.
SEE ALSO
open(2), closedir(3), opendir(3), readdir(3), rewinddir(3), scandir(3), seekdir(3), telldir(3)
Copyright (C) 2002 Andries Brouwer (aeb@cwi.nl)
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