cpmchattr - Man Page

change file attributes on CP/M files


cpmchattr [-f format] [-u] image attrib file-pattern ...


Cpmchattr changes the file attributes for files on CP/M disks.


-f format

Use the given CP/M disk format instead of the default format.

-T libdsk-type

libdsk driver type, e.g. tele for Teledisk images or raw for raw images  (requires building cpmtools with support for libdsk).


Show all CP/M file names in upper case.


Set the file attributes as given.

File Attributes

The file attribute string can contain the characters 1,2,3,4,r,s,a,n and m. The meanings of these are:


The CP/M "user attributes" F1-F4.  CP/M does not assign any meaning to these attributes, though MP/M does.


The file is read-only.  This is the same as using cpmchmod(1) to revoke write permissions.


The file is a system file.  This attribute can also be set by cpmchmod(1).


The file has been backed up.


Reset all attributes to zero.  So the string "n1r" resets all attributes and then sets F1 and Read-Only.


Attributes after an m are unset rather than set.  The string "12m34" sets atttributes F1 and F2, and unsets F3 and F4.

Return Value

Upon successful completion, exit code 0 is returned.


Any errors are indicated by exit code 1.


CPMTOOLSFMT Default format


/usr/share/cpmtools/diskdefs CP/M disk format definitions


This program is copyright 1997–2021 Michael Haardt <michael@moria.de> and copyright 2000, 2001, 2011 John Elliott <jce@seasip.demon.co.uk>.

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 version.

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.

See Also

cpmls(1), cpmchmod(1), cpm(5)


November 2, 2022 CP/M tools User commands