opendir, fdopendir - open a directory
DIR *opendir(const char *name);
DIR *fdopendir(int fd);
Feature Test Macro Requirements for glibc (see feature_test_macros
- Since glibc 2.10:
- _POSIX_C_SOURCE >= 200809L
- Before glibc 2.10:
() function opens a directory stream corresponding to the
, and returns a pointer to the directory stream. The
stream is positioned at the first entry in the directory.
() function is like opendir
(), but returns a
directory stream for the directory referred to by the open file descriptor
. After a successful call to fdopendir
internally by the implementation, and should not otherwise be used by the
() and fdopendir
() functions return a pointer to the
directory stream. On error, NULL is returned, and errno
- Permission denied.
- fd is not a valid file descriptor opened for reading.
- The per-process limit on the number of open file descriptors has been
- The system-wide limit on the total number of open files has been
- Directory does not exist, or name is an empty string.
- Insufficient memory to complete the operation.
- name is not a directory.
() is available in glibc since version 2.4.
For an explanation of the terms used in this section, see attributes
|opendir (), fdopendir ()
() is present on SVr4, 4.3BSD, and specified in POSIX.1-2001.
() is specified in POSIX.1-2008.
Filename entries can be read from a directory stream using readdir
The underlying file descriptor of the directory stream can be obtained using
() function sets the close-on-exec flag for the file
descriptor underlying the DIR *
. The fdopendir
() function leaves
the setting of the close-on-exec flag unchanged for the file descriptor,
. POSIX.1-200x leaves it unspecified whether a successful call to
() will set the close-on-exec flag for the file descriptor,