Well, a seemingly hard task has been completed...how "complete" it is, I
won't venture to say, except that I've hacked on dump & restore enough to
make them both work on MS-DOS format file systems.  I'm pretty confident
that dump is working correctly: for each file, it dumps the entire cluster
of sectors that are allocated to it and directories are the same.  restore
works...but is very naive about long names, etc.  I'm not quite sure where
any translation between modes should be done, as well as the extra info.
that gets stored in the directory blocks.  For now, those entries are just
ignored (even though they are on the backup `tape').  When restoring, it
uses the mode bits as they are for the MS-DOS file.  I'd really like to
hear back if anyone has any useful ideas on what to do with file permission
bits.

I've been working, compiling and testing on FreeBSD-2.1.6 although I don't
envisage it being much different on NetBSD.

The source is available at:
ftp://ftp.cyber.com.au/pub/unix/dump_msdos.tgz
ftp://ftp.cyber.com.au/pub/unix/restore_msdos.tgz
(and retains the BSD copyrights...)

Oh, one last question, is it ok to add these to the -current tree, under
usr.sbin for NetBSD ?  (At this point they've really just been hacked until
they work in an `expected' manner).  Should this be taken up with core
privately or ... ?

Darren

sample output:
% ll /dos/d/SDD
total 1208
-rwxrwxr-x  1 root  wheel     334 Dec 10 11:14 file_id.diz*
-rwxrwxr-x  1 root  wheel  561132 Jan 25 00:52 install.dat*
-rwxrwxr-x  1 root  wheel   62122 Jan 24 22:07 install.exe*
-rwxrwxr-x  1 root  wheel    5211 Dec 12 17:01 readme.txt*
-rwxrwxr-x  1 root  wheel  595133 Mar 17 00:53 sdd53a-d.zip*
% ./dump_msdos 0f - /dos/d > wd1s0.dump
  DUMP: Date of this level 0 dump: Sun Mar 30 23:37:19 1997
  DUMP: Date of last level 0 dump: the epoch
  DUMP: Dumping /dev/rwd2s1 (/dos/d) to standard output
  DUMP: mapping (Pass I) [regular files, directories]
  DUMP: estimated 17359 tape blocks.
  DUMP: dumping (Pass II) [directories]
  DUMP: dumping (Pass III) [regular files]
  DUMP: DUMP: 17408 tape blocks
  DUMP: DUMP IS DONE

% ./restore_msdos ivf ../dump_msdos/wd1s0.dump 
Verify tape and initialize maps
Tape block size is 32
Dump   date: Sun Mar 30 23:37:19 1997
Dumped from: the epoch
Level 0 dump of /dos/d on freebsd:/dev/wd2s1
Label: NO NAME    FAT16
Extract directories from tape
Volume: [MS-DOS_6   ]
Initialize symbol table.
restore > ls
.:
   2 *./           3  NETSCAPE/ 2629  S16DW3UP/  489  SBBASIC/  2810  WIN32S/
2811  CTCM31BB/ 1283  RECYCLED 1671  S2/       1672  SDD/

restore > add SDD
Make node ./SDD
restore > 
restore > extract
Extract requested files
You have not read any tapes yet.
Unless you know which volume your file(s) are on you should start
with the last volume and work towards towards the first.
Specify next volume #: 1
extract file ./SDD/FILE_ID.DIZ
extract file ./SDD/INSTALL.EXE
extract file ./SDD/README.TXT
extract file ./SDD/INSTALL.DAT
extract file ./SDD/SDD53A-D.ZIP
Add links
Set directory mode, owner, and times.
set owner/mode for '.'? [yn] n
restore > 
% ll -d SDD
d----w----  2 darrenr  cyber  512 Oct 17  1972 SDD/
% chmod 755 SDD
% ll SDD
total 1220
----r-----  1 darrenr  cyber     334 Sep 21  1972 FILE_ID.DIZ
----r-----  1 darrenr  cyber  561132 Oct 11  1972 INSTALL.DAT
----r-----  1 darrenr  cyber   62122 Oct 11  1972 INSTALL.EXE
----r-----  1 darrenr  cyber    5211 Sep 21  1972 README.TXT
----r-----  1 darrenr  cyber  595133 Oct 18  1972 SDD53A-D.ZIP
% chmod u+r SDD/*
% cd SDD
% foreach i (*)
foreach? cmp $i /dos/d/sdd/$i
foreach? end
%