DCHECK(8)               GENIX Programmer's Manual               DCHECK(8)



      NAME
           dcheck - file system directory consistency check

      SYNOPSIS
           /etc/dcheck [ -i numbers ] [ filesystem ]

      DESCRIPTION
           N.B.:  Dcheck  is  obsoleted  for  normal  consistency  checking  by
           fsck(8).

           Dcheck reads the directories in  a  file  system  and  compares  the
           link-count  in  each  i-node with the number of directory entries by
           which it is referenced.  If the file system is not specified, a  set
           of default file systems is checked.

           The -i flag is followed by a list of i-numbers; when  one  of  those
           i-numbers  turns  up in a directory, the number, the i-number of the
           directory, and the name of the entry are reported.

           The program is fastest if the raw version of  the  special  file  is
           used, since the i-list is read in large chunks.

      FILES
           Default file systems vary with installation.

      SEE ALSO
           fsck(8), icheck(8), filsys(5), clri(8), ncheck(8)

      DIAGNOSTICS
           When a file turns up for which the  link-count  and  the  number  of
           directory  entries disagree, the relevant facts are reported.  Allo-
           cated files which have 0 link-count and no entries are also  listed.
           The only dangerous situation occurs when there are more entries than
           links; if entries are removed, so the link-count  drops  to  0,  the
           remaining  entries point to thin air.  They should be removed.  When
           there are more links than entries, or there  is  an  allocated  file
           with  neither links nor entries, some disk space may be lost but the
           situation will not degenerate.

      BUGS
           Since dcheck is inherently two-pass in nature,  extraneous  diagnos-
           tics may be produced if applied to active file systems.

           Dcheck is obsoleted by fsck and remains for historical reasons.











      Printed 11/16/83                                                        1