fsck.cpm - check a CP/M file system
is used to check and repair a CP/M file system. After reading
the directory, it makes two passes. The first pass checks extent fields for
range and format violations (bad status, extent number, last record byte
count, file name, extension, block number, record count, size of .COM files,
time stamp format, invalid password characters, invalid time stamp mode). The
second pass checks extent connectivity (multiple allocated blocks and
duplicate directory entries).
can not yet repair all errors.
- -f format
- Use the given CP/M disk format instead of the
- -T libdsk-type
- libdsk driver type, e.g. tele for Teledisk images or
raw for raw images (requires building cpmtools with support for
- Open the file system read-only and do not repair any
Upon successful completion, exit code 0 is returned.
Any errors are indicated by exit code 1.
/etc/cpmtools/diskdefs CP/M disk format definitions
CPMTOOLSFMT Default format
- image: used/total files
(n.n% non-contiguos), used/total blocks
- No inconsistencies could be found. The number of used files
actually is the number of used extents. Since a file may use more than one
extent, this may be greather than the actual number of files, but a
correct measure would not reflect how many files could still be created at
most. A file is considered fragmented, if sequential data blocks pointed
to by the same extent do not have sequential block numbers. The number of
used blocks includes the blocks used for system tracks and the
This program is copyright 1997–2012 Michael Haardt
<firstname.lastname@example.org>. The Windows port is copyright 2000, 2001, 2011 John
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 3 of the License, or (at your option) any later
This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA.