Re: Amd mounts CD-ROM without any permission.

[RVP <rvp%SDF.ORG@localhost>]

On Mon, 9 Nov 2026, Kogule Ryo wrote:

> It still mounts CD-ROM automatically but drops all permission.  Manual
> mounting (mount_cd9660) still works.
>
> Does anyone has any suggestion to fix it?
> [...]
> % ls -l /cd/drive0
> lrwxrwxrwx  1 root  wheel  20 Nov  9 01:01 /cd/drive0 -> /a/vnetbsd/cd/drive0
>
> % ls -l /a/vnetbsd/cd
> total 8
> d---------  20 root  wheel  4096 Nov  2 17:34 drive0

This looks like a bug in the `cdfs' type of amd(8). It's memset()ing `cdfs_args'
(AKA `struct iso_args') to `0', then not changing the `iso_args.fmask' and
`iso_args.dmask' anywhere, so you end up with the permissions, above:

https://github.com/NetBSD/src/blob/trunk/external/bsd/am-utils/dist/amd/ops_cdfs.c#L114

File a PR. The fix (or at least, a hack) for this is pretty simple.

-RVP