debian man page for fdopendir

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

NAME
       opendir, fdopendir - open a directory

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

       DIR *opendir(const char *name);
       DIR *fdopendir(int fd);

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

       fdopendir():
	   Since glibc 2.10:
	       _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
	   Before glibc 2.10:
	       _GNU_SOURCE

DESCRIPTION
       The  opendir()  function  opens a directory stream corresponding to the directory name, and returns a pointer to the directory stream.  The
       stream is positioned at the first entry in the directory.

       The fdopendir() function is like opendir(), but returns a directory stream for the directory referred to by the open  file  descriptor  fd.
       After a successful call to fdopendir(), fd is used internally by the implementation, and should not otherwise be used by the application.

RETURN VALUE
       The  opendir()  and fdopendir() functions return a pointer to the directory stream.  On error, NULL is returned, and errno is set appropri-
       ately.

ERRORS
       EACCES Permission denied.

       EBADF  fd is not a valid file descriptor opened for reading.

       EMFILE Too many file descriptors in use by process.

       ENFILE Too many files are currently open in the system.

       ENOENT Directory does not exist, or name is an empty string.

       ENOMEM Insufficient memory to complete the operation.

       ENOTDIR
	      name is not a directory.

VERSIONS
       fdopendir() is available in glibc since version 2.4.

CONFORMING TO
       opendir() is present on SVr4, 4.3BSD, and specified in POSIX.1-2001.  fdopendir() is specified in POSIX.1-2008.

NOTES
       The underlying file descriptor of the directory stream can be obtained using dirfd(3).

       The opendir() function sets the close-on-exec flag for the file descriptor underlying the DIR *.  The fdopendir() function leaves the  set-
       ting  of  the  close-on-exec  flag  unchanged for the file descriptor, fd.  POSIX.1-200x leaves it unspecified whether a successful call to
       fdopendir() will set the close-on-exec flag for the file descriptor, fd.

SEE ALSO
       open(2), closedir(3), dirfd(3), readdir(3), rewinddir(3), scandir(3), seekdir(3), telldir(3)

COLOPHON
       This page is part of release 3.44 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

GNU
								    2010-06-20								OPENDIR(3)