From mboxrd@z Thu Jan  1 00:00:00 1970
From: Baurjan Ismagulov <ibr@gantek.com>
Subject: unable to boot as user
Date: Fri, 14 Jun 2002 17:21:26 +0300
Sender: linux-msdos-owner@vger.kernel.org
Message-ID: <20020614142121.GA11777@gantek.com>
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To: linux-msdos@vger.kernel.org

Hello,

I'm trying to boot win98 under dosemu 1.0.2.1-8 from debian sid. I put
the diskette image under /var/lib/dosemu, set

        $_vbootfloppy = "win98.img"

in dosemu.conf and run dosemu. It boots as expected if dosemu is run by
root, and otherwise fails with the following message:

        Linux DOS emulator 1.0.2.1 $Date: 2001/10/13 $
        Last configured at Sun Apr 28 14:06:33 EST 2002 on linux

        Disk I/O error
        Replace the disk, and then press any key

Pressing any key just causes the message to repeat. Dosemu exits after
retrying three times.


I have "all c_all" in dosemu.users. I've tried setting $_secure to ""
and "0" in dosemu.conf and making dosemu.bin suid root -- the same
result.


List archives and Google retrieve quite a few threads discussing similar
issues, but I couldn't figure out how I can solve that. I would
appreciate any help. Please cc to me, as I'm not subscribed.


Attached are relevant (IMHO, that is) snippets from -D+a and strace -f
outputs.


Thanks in advance,
Baurjan.


Debug output (user):

        CONSOLE MSG: 'Linux DOS emulator 1.0.2.1 $Date: 2001/10/13 $'
        CONSOLE MSG: 'Last configured at Sun Apr 28 14:06:33 EST 2002 on linux'
        int 0x1c, ax=0x0000
        DEFIVEC: int 0x1c @ 0xf000:0x01c0
        Return from vm86() for STI
        int 0x1c, ax=0x0000
        DEFIVEC: int 0x1c @ 0xf000:0x01c0
        Return from vm86() for STI
        DISK: null dp
        Sector not found 1!
        DISK 0 read [h:1,s:1,t:0](1)->0x700
        DISK 0 undefined.


Debug output (root):

        CONSOLE MSG: 'Linux DOS emulator 1.0.2.1 $Date: 2001/10/13 $'
        CONSOLE MSG: 'Last configured at Sun Apr 28 14:06:33 EST 2002 on linux'
        int 0x1c, ax=0x0000
        DEFIVEC: int 0x1c @ 0xf000:0x01c0
        Return from vm86() for STI
        DISK: /var/lib/dosemu/win95.img: Trying to read 1 sectors at T/S/H
        0/1/1+0 at pos 9728
        DISK read @1/0/1 (1) -> 0x700 OK.
        DISK: /var/lib/dosemu/win95.img: Trying to read 1 sectors at T/S/H
        0/15/1+0 at pos 16896
        DISK read @1/0/15 (1) -> 0x700 OK.