1OPENDIR(3) Linux Programmer's Manual OPENDIR(3)
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6 opendir, fdopendir - open a directory
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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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16 The opendir() function opens a directory stream corresponding to the
17 directory name, and returns a pointer to the directory stream. The
18 stream is positioned at the first entry in the directory.
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20 The fdopendir() is like opendir(), but returns a directory stream for
21 the directory referred to by the open file descriptor fd. After a suc‐
22 cessful call to fdopendir(), fd is used internally by the implementa‐
23 tion, and should not otherwise be used by the application.
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26 The opendir() and fdopendir() functions return a pointer to the direc‐
27 tory stream. On error, NULL is returned, and errno is set appropri‐
28 ately.
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31 EACCES Permission denied.
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33 EBADF fd is not a valid file descriptor opened for reading.
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35 EMFILE Too many file descriptors in use by process.
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37 ENFILE Too many files are currently open in the system.
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39 ENOENT Directory does not exist, or name is an empty string.
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41 ENOMEM Insufficient memory to complete the operation.
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43 ENOTDIR
44 name is not a directory.
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47 fdopendir() is available in glibc since version 2.4.
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50 opendir() is present on SVr4, 4.3BSD, and specified in POSIX.1-2001.
51 fdopendir() is specified in POSIX.1-2008.
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54 The underlying file descriptor of the directory stream can be obtained
55 using dirfd(3).
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57 The opendir() function sets the close-on-exec flag for the file
58 descriptor underlying the DIR *. The fdopendir() function leaves the
59 setting of the close-on-exec flag unchanged for the file descriptor,
60 fd. POSIX.1-200x leaves it unspecified whether a successful call to
61 fdopendir() will set the close-on-exec flag for the file descriptor,
62 fd.
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65 open(2), closedir(3), dirfd(3), readdir(3), rewinddir(3), scandir(3),
66 seekdir(3), telldir(3)
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69 This page is part of release 3.22 of the Linux man-pages project. A
70 description of the project, and information about reporting bugs, can
71 be found at http://www.kernel.org/doc/man-pages/.
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75GNU 2008-08-06 OPENDIR(3)