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dirfd(3)                Library Functions Manual                dirfd(3)

НАЗВАНИЕ

       dirfd - get directory stream file descriptor

БИБЛИОТЕКА

       Standard C library (libc, -lc)

СИНТАКСИС

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

       int dirfd(DIR *dirp);

   Feature Test Macro Requirements for glibc (see
   feature_test_macros(7)):

       dirfd():
           /* Since glibc 2.10: */ _POSIX_C_SOURCE >= 200809L
               || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

ОПИСАНИЕ

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

       This file descriptor is the one used internally by the directory
       stream.  As a result, it is useful only 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.

ЗНАЧЕНИЕ, ВОЗВРАЩАЕМОЕ ФУНКЦИЕЙ

       On success, dirfd() returns a file descriptor (a nonnegative
       integer).  On error, -1 is returned, and errno is set to indicate
       the error.

ОШИБКИ

       POSIX.1-2008 specifies two errors, neither of which is returned
       by the current implementation.

       EINVAL dirp does not refer to a valid directory stream.

       ENOTSUP
              The implementation does not support the association of a
              file descriptor with a directory.

АТРИБУТЫ

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌─────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                           │ Attribute     │ Value   │
       ├─────────────────────────────────────┼───────────────┼─────────┤
       │ dirfd()                             │ Thread safety │ MT-Safe │
       └─────────────────────────────────────┴───────────────┴─────────┘

СТАНДАРТЫ

       POSIX.1-2008.

ИСТОРИЯ

       4.3BSD-Reno (not in 4.2BSD).

СМОТРИТЕ ТАКЖЕ

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

КОЛОФОН

       This page is part of the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.9.1.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2024-06-26.  If you discover any rendering problems in this HTML
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       part of the original manual page), send a mail to
       man-pages@man7.org

Linux man-pages 6.9.1          2024-05-02                       dirfd(3)

Страницы, ссылающиеся на эту страницу: open(2), opendir(3), readdir(3)