1OPENDIR(3)                 Linux Programmer's Manual                OPENDIR(3)
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NAME

6       opendir, fdopendir - open a directory
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SYNOPSIS

9       #include <sys/types.h>
10       #include <dirent.h>
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12       DIR *opendir(const char *name);
13       DIR *fdopendir(int fd);
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15   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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17       fdopendir():
18       Since glibc 2.10: _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
19       Before glibc 2.10: _GNU_SOURCE
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DESCRIPTION

22       The  opendir()  function  opens a directory stream corresponding to the
23       directory name, and returns a pointer to  the  directory  stream.   The
24       stream is positioned at the first entry in the directory.
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26       The  fdopendir()  function  is  like opendir(), but returns a directory
27       stream for the directory referred to by the open  file  descriptor  fd.
28       After  a  successful  call to fdopendir(), fd is used internally by the
29       implementation, and should not otherwise be used by the application.
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RETURN VALUE

32       The opendir() and fdopendir() functions return a pointer to the  direc‐
33       tory  stream.   On  error, NULL is returned, and errno is set appropri‐
34       ately.
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ERRORS

37       EACCES Permission denied.
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39       EBADF  fd is not a valid file descriptor opened for reading.
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41       EMFILE Too many file descriptors in use by process.
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43       ENFILE Too many files are currently open in the system.
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45       ENOENT Directory does not exist, or name is an empty string.
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47       ENOMEM Insufficient memory to complete the operation.
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49       ENOTDIR
50              name is not a directory.
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VERSIONS

53       fdopendir() is available in glibc since version 2.4.
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CONFORMING TO

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

60       The  underlying file descriptor of the directory stream can be obtained
61       using dirfd(3).
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63       The opendir()  function  sets  the  close-on-exec  flag  for  the  file
64       descriptor  underlying  the DIR *.  The fdopendir() function leaves the
65       setting of the close-on-exec flag unchanged for  the  file  descriptor,
66       fd.   POSIX.1-200x  leaves  it unspecified whether a successful call to
67       fdopendir() will set the close-on-exec flag for  the  file  descriptor,
68       fd.
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SEE ALSO

71       open(2),  closedir(3),  dirfd(3), readdir(3), rewinddir(3), scandir(3),
72       seekdir(3), telldir(3)
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COLOPHON

75       This page is part of release 3.25 of the Linux  man-pages  project.   A
76       description  of  the project, and information about reporting bugs, can
77       be found at http://www.kernel.org/doc/man-pages/.
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81GNU                               2010-06-20                        OPENDIR(3)
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