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dir(4)								       dir(4)



NAME
  dir -	Format of directories

SYNOPSIS

  #include <&lt;sys/types.h>&gt;
  #include <&lt;dirent.h>&gt;

DESCRIPTION
  A directory behaves like an ordinary file except that	no user	may write
  into a directory.  The fact that a file is a directory is indicated by a
  bit in the flag word of its inode entry. See the fs reference	page.

  The POSIX standard way of returning directory	entries	is in directory	entry
  structures, which are	of variable length.  Each directory entry has a
  struct direct	at the front of	it, containing its inode number, the length
  of the entry,	and the	length of the name contained in	the entry.  These are
  followed by the name padded to a 4-byte boundary with	null bytes.  All
  names	are guaranteed null terminated.	 The maximum length of a name in a
  directory is _D_NAME_MAX.

  By convention, the first two entries in each directory are for . (dot) and
  .. (dot-dot).	 The first is an entry for the directory itself.  The second
  is for the parent directory.	The meaning of .. (dot-dot) is modified	for
  the root directory (/) of the	master file system, where .. (dot-dot) has
  the same meaning as .	(dot).

RELATED	INFORMATION

  Functions: opendir(3)

  Files: fs(4)