term% cat index.txt DIR(5) File Formats Manual DIR(5)
NAME
dir - format of directories
SYNOPSIS
#include <sys/types.h>
#include <sys/dir.h>
DESCRIPTION
A directory behaves exactly like an ordinary file, save that no user
may write into a directory. The fact that a file is a directory is in‐
dicated by a bit in the flag word of its i-node entry; see filsys(5).
The structure of a directory entry as given in the include file is:
#ifndef DIRSIZ
#define DIRSIZ 14
#endif
struct direct
{
ino_t d_ino;
char d_name[DIRSIZ];
};
By convention, the first two entries in each directory are for ‘.' and
‘..'. The first is an entry for the directory itself. The second is
for the parent directory. The meaning of ‘..' is modified for the root
directory of the master file system (‘/'), where ‘..' has the same
meaning as ‘.'.
SEE ALSO
filsys(5), directory(3)
DIR(5)