fileno(3) — Справочная страница Linux

fileno(3)               Library Functions Manual               fileno(3)

НАЗВАНИЕ

       fileno - obtain file descriptor of a stdio stream

БИБЛИОТЕКА

       Standard C library (libc, -lc)

СИНТАКСИС

       #include <stdio.h>

       int fileno(FILE *stream);

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

       fileno():
           _POSIX_C_SOURCE

ОПИСАНИЕ

       The function fileno() examines the argument stream and returns
       the integer file descriptor used to implement this stream.  The
       file descriptor is still owned by stream and will be closed when
       fclose(3) is called.  Duplicate the file descriptor with dup(2)
       before passing it to code that might close it.

       For the nonlocking counterpart, see unlocked_stdio(3).

ЗНАЧЕНИЕ, ВОЗВРАЩАЕМОЕ ФУНКЦИЕЙ

       On success, fileno() returns the file descriptor associated with
       stream.  On failure, -1 is returned and errno is set to indicate
       the error.

ОШИБКИ

       EBADF  stream is not associated with a file.

АТТРИБУТЫ

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

СТАНДАРТЫ

       POSIX.1-2008.

ИСТОРИЯ

       POSIX.1-2001.

СМОТРИТЕ ТАКЖЕ

       open(2), fdopen(3), stdio(3), unlocked_stdio(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
       version of the page, or you believe there is a better or more up-
       to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not
       part of the original manual page), send a mail to
       man-pages@man7.org

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

Страницы, которые ссылаются на эту страницу: fsync(2), fclose(3), ferror(3), fflush(3), fmemopen(3), fopen(3), open_memstream(3), pcap_file(3pcap), stdio(3)