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RedHat 9 (Linux i386) - man page for opendir (redhat section 3)

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

NAME
opendir - open a directory
SYNOPSIS
#include <sys/types.h> #include <dirent.h> DIR *opendir(const char *name);
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.
RETURN VALUE
The opendir() function returns a pointer to the directory stream or NULL if an error occurred.
ERRORS
EACCES Permission denied. 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.
NOTES
The underlying file descriptor of the directory stream can be obtained using dirfd(3).
CONFORMING TO
SVID 3, POSIX, BSD 4.3
SEE ALSO
open(2), closedir(3), dirfd(3), readdir(3), rewinddir(3), scandir(3), seekdir(3), telldir(3) 1995-06-11 OPENDIR(3)