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)