Re: BoS: amodload.tar.gz - dynamic SunOS modules

[dm () alphasun anu edu au (Dave Matthews)]

Markus wrote:

> I have wondered about how to set up a system with a read only / and /usr
> partition, but as you say things like mount wanting to write into /etc
> really spoil the idea.  Does anyone have a list of issues that stop /
> and /usr being mounted read only (either logically or physically, or on
> read only media) on a machine running say Solaris ? I'll start off the
> list with the following.

I'd also include: (some of these are Sol 2.x specific)

>         Program/system          writes to
>
>         mountd                  /etc/mnttab
                                  /etc/rmtab and /etc/.mnttab.lock
>         automountd              /etc/mnttab
>         passwd                  /etc/passwd /etc/shadow
                                /etc/opasswd /etc/oshadow
>         syslogd                 /etc/syslog.pid
>         crond                   /etc/cron.d/FIFO
>         opie                    /etc/opiekeys
          skey                  /etc/skeykeys ... depends on skey config
>

        sendmail                /etc/mail/aliases .. if you update your aliases
                                                   here
        lp              /etc/lp/.....  updates for warning/status messages etc
        init            /etc/initpipe
        utmpd           /etc/utmppipe

also, /etc/inet/hosts, /etc/group, and /etc/dfs/* would probably be modified
on a lot of systems.....one of the default startup scripts in Sol 2.x writes
to /etc/dfs/sharetab..

About /dev, /devices - some of Sun's startup scripts chmod these on startup.
Also, there would be problems with a lot of other devices, not to mention
pseudo ttys, hard disks, and almost as important, /dev/audio* :)


Dave







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Dave Matthews                                Senior Programmer
email: dm () alphasun anu edu au                School of Mathematical Sciences
phone: (06) 249 3833, int. +61 6 249 3833    Australian National University
fax: (06) 249 5549, int. +61 6 249 5549    CANBERRA ACT 0200
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