dir

Purpose

     Describes the format of a directory.

Synopsis

     #include <sys/dir.h>

Description

     A directory is a file that a user is not allowed to write
     into directly.  A directory file contains a 16-byte entry
     for  each file  in it.   A bit  in the  flag word  of the
     i-node entry indicates that the corresponding file should
     be treated  as a  directory.  For  additional information
     about a system volume format, see the "fs." The structure
     of a directory entry as given in the include file is:

          #include <sys/types.h>
          #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 .  (dot) and .. (dot  dot).  The first .  is an entry
     for the directory itself.  The .. entry is for the parent
     directory.   The meaning  of the  .. entry  for the  root
     directory of  the master file system  is modified.  There
     is no parent  directory; therefore, the ..  entry has the
     same meaning as the . entry.

Related Information

     In this book:  "fs" and "inode."