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Annotation of researchv10dc/dist/man/v4/man5/dir.5, revision 1.1.1.1

1.1       root        1: .th DIRECTORY V 9/10/73
                      2: .sh NAME
                      3: dir \*- format of directories
                      4: .sh DESCRIPTION
                      5: A directory
                      6: behaves exactly like an ordinary file, save that no
                      7: user may write into a directory.
                      8: The fact that a file is a directory is indicated by
                      9: a bit in the flag word of its i-node entry.
                     10: Directory entries are 16 bytes long.
                     11: The first word is the i-number of the file represented
                     12: by the entry, if non-zero; if zero, the entry is empty.
                     13: .s3
                     14: Bytes 2-15 represent the (14-character)
                     15: file name, null padded on the right.
                     16: These bytes are not cleared for empty slots.
                     17: .s3
                     18: By convention, the first two entries in each directory
                     19: are for ``\fB.\fR'' and ``\fB..\fR''.  The first is an entry for the
                     20: directory itself.  The second is for the parent
                     21: directory.
                     22: The meaning of ``\fB..\fR'' is modified for the root directory
                     23: of the master file system and for the root directories of removable
                     24: file systems.
                     25: In the first case, there is no parent, and in the second,
                     26: the system does not permit off-device references.
                     27: Therefore in both cases ``\fB..\fR'' has the
                     28: same meaning as ``\fB.\fR''.
                     29: .sh "SEE ALSO"
                     30: file system (V)

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