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DIRFD(3)                   Linux Programmer's Manual                  DIRFD(3)

       dirfd - get directory stream file descriptor

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

       int dirfd(DIR *dirp);

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

           _BSD_SOURCE || _SVID_SOURCE
           || /* Since glibc 2.10: */
               (_POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700)

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

       This 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.

       On success, a nonnegative file descriptor is returned.  On error, -1 is
       returned, and errno is set to indicate the cause of the error.

       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.

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

   Multithreading (see pthreads(7))
       The dirfd() function is thread-safe.

       POSIX.1-2008.  This function was a BSD extension,  present  in  4.3BSD-
       Reno, not in 4.2BSD.

       The   prototype  for  dirfd()  is  available  only  if  _BSD_SOURCE  or
       _SVID_SOURCE is defined.

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

       This  page  is  part of release 3.74 of the Linux man-pages project.  A
       description of the project, information about reporting bugs,  and  the
       latest     version     of     this    page,    can    be    found    at

Linux                             2013-07-05                          DIRFD(3)

Czas wygenerowania: 0.00013 sek.

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