Somehow as root, I changed my shell to a non-existent shell '/bin/tcsh' on
OpenBSD 4.2

When I try to su, I get this error:
su: /bin/tcsh: No such file or directory

I can't login as root, ssh in as root or su to root. I'm not in the sudoers
file (but I am in the wheel group) so I can't sudo chsh for root. Any
suggestions. I just set the box up today. It's been years since I used
OpenBSD. I'm a bit rusty and duller than I once was :)

Thanks,
Brad

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can  you log in using single user mode?

boot>  boot -s

then change it?

Aaron

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For the future, I find it useful to have headless boxes set up for
serial console attached (or attachable) to a modem.  Saves the drive.

Doug.

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No problem. Put in the boot media you used to install OpenBSD and boot
with it. At the (U)pgrade, (I)nstall, (S)hell prompt type 's' for shell.

Next, you can "really" fix the problem. Maybe someone else will tell you
how. I'm going to tell you the first short way that comes to mind...

# mount /dev/wd0a /mnt
# cd /mnt/bin
# cp ksh tcsh
# echo /bin/tcsh >> /mnt/etc/shells

<eject boot media>

# reboot

<login and fix your shell to be one of the installed ones>

# rm /bin/tcsh

-- 
Darrin Chandler            |  Phoenix BSD User Group  |  MetaBUG
dwchandler@stilyagin.com   |  http://phxbug.org/      |  http://metabug.org/
http://www.stilyagin.com/  |  Daemons in the Desert   |  Global BUG Federation

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Get your boot CD out.  Go into the shell, and then you can mount
the  root partition on /mnt, and  start fixing things.

--STeve Andre'

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Hi Folks,

I've just been upgrading some of our old war horses (Nokia IP440) to 
4.2. They run Intel made BX PIII chipset motherboards, dmesg below.

Whilst not extensive the boards do have some sensor data that we grab to 
check on the health of the old girls. After a fresh install of 4.2 I 
noticed we had lost the FAN readout from the list of sensors, see output 
below (taken from different boxes but I've confirmed the loss using the 
same box switching between 4.1 and 4.2).

Whilst this isn't critical for us on these units whatever is causing the 
omission may have bigger problems for other people so I thought I'd 
bring it to the lists attention.

Many thanks to all the developers for yet another excellence release in 
4.2, the bulk CD order is going through soon!

Sensor Output from 4.1 i386 (sysctl -a hw)

hw.machine=i386
hw.model=Intel Pentium III ("GenuineIntel" 686-class)
hw.ncpu=1
hw.byteorder=1234
hw.physmem=267993088
hw.usermem=267988992
hw.pagesize=4096
hw.disknames=wd0,cd0,fd0
hw.diskcount=3
hw.sensors.lmenv0.temp1=23.00 degC (Internal)
*hw.sensors.lmenv0.fan0=2647 RPM ******* MISSING *******
hw.sensors.lmenv0.fan1=3970 RPM ********* MISSING ********
hw.sensors.lmenv0.volt0=1.52 VDC (+2.5Vin)
hw.sensors.lmenv0.volt1=1.66 VDC (Vccp)
hw.sensors.lmenv0.volt2=3.30 VDC (+Vcc)
hw.sensors.lmenv0.volt3=5.08 VDC (+5Vin/Vcc)
hw.sensors.lmenv0.volt4=12.38 VDC (+12Vin)
hw.sensors.lmenv0.volt5=2.43 VDC (Vccp)
hw.cpuspeed=599
hw.vendor=Intel Corporation
hw.product=SE440BX-2
hw.uuid=ebf758f0-b47b-11d4-af0d-0030d3006ea4

Sensor Output from 4.2 i386 (sysctl -a hw)

hw.machine=i386
hw.model=Intel Pentium III ("GenuineIntel" 686-class)
hw.ncpu=1
hw.byteorder=1234
hw.physmem=267993088
hw.usermem=267984896
hw.pagesize=4096
hw.disknames=wd0,cd0,fd0
hw.diskcount=3
hw.sensors.lmenv0.temp1=28.00 degC (Internal)
hw.sensors.lmenv0.volt0=1.50 VDC (+2.5Vin)
hw.sensors.lmenv0.volt1=1.69 VDC (Vccp)
hw.sensors.lmenv0.volt2=3.27 VDC (+Vcc)
hw.sensors.lmenv0.volt3=5.05 ...
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fixed, lm87.c#rev1.20. :)

The bug was caused by an ininitialised value, such that fan sensors in
certain chips (lm81, adm9240 and ds1780) might have pseudo-randomly
never appeared. Just to make it clear -- this was not a regression in
4.2, the fact that it was missing from 4.2 is simply a pseudo-random
occurrence. :)

In any case, the bug should be gone for good, thanks to LLVM/Clang
Static Analyser.

br,
cnst.su.


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