Here are a few messages from the list that might help.
> ----------
> From: Nathan Paul Simons[SMTP:[EMAIL PROTECTED]]
> Reply To: [EMAIL PROTECTED]
> Sent: Wednesday, February 21, 2001 10:04 PM
> To: Frederic Cazenave
> Cc: Der Herr Hofrat; Ludwig Ofele; [EMAIL PROTECTED]
> Subject: Re: [rtl] root id
>
> On Wed, Feb 21, 2001 at 05:56:40PM -0500, Frederic Cazenave wrote:
> <snip>
> > gcc -v
> > Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs
> > gcc version 2.96 20000731 (Red Hat Linux 7.0)
> <snip>
>
> Erk . . . um, there have been known problems compiling the kernel
> with RedHat's "stable" distribution because they decided to put a cutting
> edge compiler in it. I don't know if that version of the compiler (2.96)
> miscompiles RTLinux, but I wouldn't rule that out. Have you tried getting
> the updates for RedHat or using a different version of the compiler (2.7.2.x
> comes to mind right away)?
> -- [rtl] ---
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> --
> For more information on Real-Time Linux see:
> http://www.rtlinux.org/rtlinux/
>
>
>
>
>
> ----------
> From: Frederic Cazenave[SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, February 21, 2001 1:53 PM
> Cc: Ludwig > Öfele; [EMAIL PROTECTED]
> Subject: Re: [rtl] root id
>
> Thanks every buddies, I have upgraded my glibc (glibc-2.2.2-1.i686.rpm) and my
> problem
> seem to be solved.
>
> Fred
>
> Frederic Cazenave wrote:
>
> > The both files /etc/passwd and /etc/group the id of root is 0 !!!
> >
> > Fred
> >
> > Ludwig Öfele wrote:
> >
> > > Hello Frederic!
> > >
> > > I think, I had a similar problem after an update of Linux Kernel
> > > (without RT). Your effective user id is 4294967295 which corresponds to
> > > -1 if you look at it in 64-Bit-Terms. There seems to be a change of
> > > semantics (-1 changed to 4294967295) in the system and now the rights of
> > > user and the rights of files do not match any more. I can't explain it
> > > any better, but maybe this gives you an advice.
> > > I think, I fixed it by changing the id -1 in the groups or passwd file
> > > to something more sensful ( (unsigned int32)(-1) = 65535 ?).
> > >
> > > Have luck!
> > >
> > > Ludwig Öfele, Humantec Industriesysteme
> > >
> > > Frederic Cazenave wrote:
> > > >
> > > > Last week I have posted a question concerning the lost of my root
> > > > privilege
> > > > after installing rtlinux modules. I can summary all my mail with hofrat
> > > > ( Der Herr Hofrat <[EMAIL PROTECTED]> ), thanks to him, as following :
> > > >
> > > > I have installed this files :
> > > > 521612 -rw-r--r-- 1 root root 19090206 Feb 14 20:56
> > > > linux-2.2.18.tar.gz
> > > > 521622 -rw-r--r-- 1 root root 450860 Feb 16 15:10
> > > > rtlinux-3.0.tar.gz
> > > >
> > > > then patch linux with kernel_patch-2.2 and build the new rtlinux image
> > > >
> > > > when I reboot my machine and logged as root my id is
> > > >
> > > > [root@xport /root]# id
> > > > uid=0(root) gid=0(root)
> > > > groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)
> > > >
> > > > After installing all the modules of rtlinux my effective id changes :
> > > >
> > > > uid=0(root) gid=0(root) euid=4294967295
> > > > groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)
> > > > (here there is no possibility to bring down the system propely !!)
> > > >
> > > > If I remove all the rt modules my id goes back to the original
> > > >
> > > > uid=0(root) gid=0(root)
> > > > groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)
> > > >
> > > > Rigth now I didn't find any solution
> > > >
> > > > Fred Cazenave
> > > >
> > > > --
> > > > _________________________________________________________
> > > > | |>
> > > > | Frederic CAZENAVE |
> > > > | _/\_ /^= McGill Radar |
> > > > | \_/ \// Box 198, MacDonald College |
> > > > | | /-\ | Ste Anne de Bellevue |
> > > > | || || Quebec, Canada H9X 3V9 |
> > > > | Tel (514) 398 7733 fax (514) 398 7755 |
> > > > | mailto:[EMAIL PROTECTED] |
> > > > | http://www.mpl.orstom.fr/hydrologie/catch/ |
> > > > |__________________________________________________________|
> > > >
> > > > -- [rtl] ---
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> > > > --
> > > > For more information on Real-Time Linux see:
> > > > http://www.rtlinux.org/rtlinux/
> >
> > -- [rtl] ---
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> > --
> > For more information on Real-Time Linux see:
> > http://www.rtlinux.org/rtlinux/
>
> --
> _________________________________________________________
> | |
> | Frederic CAZENAVE |
> | _/\_ /^= McGill Radar |
> | \_/ \// Box 198, MacDonald College |
> | | /-\ | Ste Anne de Bellevue |
> | || || Quebec, Canada H9X 3V9 |
> | Tel (514) 398 7733 fax (514) 398 7755 |
> | mailto:[EMAIL PROTECTED] |
> | http://www.mpl.orstom.fr/hydrologie/catch/ |
> |__________________________________________________________|
>
>
>
> -- [rtl] ---
> To unsubscribe:
> echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR
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> --
> For more information on Real-Time Linux see:
> http://www.rtlinux.org/rtlinux/
>
>
>
> ----------
> From: Cort Dougan[SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, February 21, 2001 1:40 PM
> To: Basham, Richard R
> Cc: [EMAIL PROTECTED]
> Subject: Re: [rtl] root id
>
> } I think the bigger question here is: Why did this happen in the first place?
> }
> } Cort,
> }
> } Is there anyone at FSM Labs know why this occurred?
>
> The problem was with the psc module. Well, actually it wasn't the psc
> module it was bad user-land programs.
>
> The PSC module grabs a free syscall when it's loaded. With older kernels
> we were getting a free syscall that happens to correspond with a syscall
> added to later kernels to set/check privilege levels. Some user-programs
> would make a direct call to syscall #201 (not through glibc) and assume it
> was the correct one. On kernels that didn't support this syscall the
> user-program would get an error. When psc grabbed that syscall the
> user-program would end up calling a syscall it didn't intend rather than
> the privilege syscall.
>
> We've changed the syscall hook code in psc so that it searches top-down
> rather than bottom up. That fixes the problem.
>
> In short, if you have doubts just don't load psc. It's not needed unless
> you're using the user-level realtime features of RTLinux.
>
>
>
>
> ----------
> From: Hai Xu[SMTP:[EMAIL PROTECTED]]
> Sent: Friday, March 16, 2001 2:04 AM
> To: [EMAIL PROTECTED]
> Subject: [rtl] A strange problem!
>
> Dear all,
>
> I met a very strange problem of RTLinux. My system is RedHat 7.0 + Linux Kerenl
>2.2.18 + RTLinux 3.0 final. When I finish the installation of RTLinux 3.0, everything
>looks fine. So I use "rtlinux start" command to start the rtlinux. Then the strange
>problem happens. It says my uid is changed. When I use "whoami" to check my status,
>it says "whoami: cannot find username for UID 4294967295".(I login as root, so I
>think the uid should be 0)>
>
> Then I can not reboot or shutdown my computer. When I type in "reboot", it tells me
>as I am not a superuser, I can not do so. I then logout, try to restart the computer
>using the menu of login screen, but I just go back to the login screen. I have to
>reset my computer. After I tried several times, I found out that I just need to stop
>the rtlinux, then everything is OK. So I think maybe this problem is coming from
>RTLinux.
>
> I hope you can give me some help about it.
>
> Thanks in advance.
>
> Hai Xu
>
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For more information on Real-Time Linux see:
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