Re: [9fans] weird file names

Re: [9fans] weird file names

[Russ Cox]

> if i mount the plan9.iso archive on linux, i see some weird file
> and directory names.  e.g.
>
> /rc/bin/a: -> /rc/bin/D001139
> /rc/bin/b: -> /rc/bin/F001146
> /rc/bin/c: -> /rc/bin/D001140
> /rc/bin/9fat: -> /rc/bin/F001142
>
> i noticed a similar problem on a cdrom i had burned on solaris.
> is there any way to fix this ?

As William correctly guessed, the CD image has
ISO9660, Plan 9, and Joliet (MS Windows Unicode
long names) file tables.  No Rock Ridge, because
Plan 9 and Rock Ridge are somewhat incompatible.

You're seeing the Joliet names, or else you'd
see a lot more [DF]xxxxxx names.  The ones in
/rc/bin are unfortunate: even in Joliet they
have to be rewritten since they contain reserved
characters (the colons).

There's no way around this unless you implement
the Plan 9 extensions in your iso9660 reader.

(I could try to make Plan 9 and Rock Ridge extensions coexist,
but I'm really quite happy with Joliet, which has
the advantage of having a clear definition for dealing
with Unicode.)

Russ

[9fans] weird file names

[Taj Khattra]

if i mount the plan9.iso archive on linux, i see some weird file
and directory names.  e.g.

/rc/bin/a: -> /rc/bin/D001139
/rc/bin/b: -> /rc/bin/F001146
/rc/bin/c: -> /rc/bin/D001140
/rc/bin/9fat: -> /rc/bin/F001142

i noticed a similar problem on a cdrom i had burned on solaris.
is there any way to fix this ?

thanks

-taj

Re: [9fans] weird file names

[William Josephson]

On Fri, May 03, 2002 at 07:01:27AM -0000, Taj Khattra wrote:
> if i mount the plan9.iso archive on linux, i see some weird file
> and directory names.  e.g.

> i noticed a similar problem on a cdrom i had burned on solaris.
> is there any way to fix this ?

Look at the man page for mk9660:
it isn't a bug.  ISO9660 requires
8.3 filenames so non-conformant
names are converted to {F,D}NNNNNN.
with F for files and D for directories.
I haven't looked at the CD image yet,
but it probably has joliet path tables
and probably Plan 9 or system use
fields (mk9660 also supports RRIP
system use fields).  ISO9660 and
friends are truly brain damaged as
Russ and I found out when we wrote
dump9660.  That said, there are some
bugs in the distributed version that
make Win2K and NT unhappy.  Now that
they are quashed (I hope), the next
update should have fixes.