cygwin can't find any path data after Vista Service Pack 2 upgrade

[John simmons <strannik at strannik dot com>]

Shortly after updating vista to service pack 2, Cygwin broke.  It can't 
find anything.  The bash shell launches to /cygdrive/c/cygwin/bin.  No 
commands work, except for pwd and cd. If I invoke env by ./env (the only 
way it works) I get:

bash-3.2$ ./env
HOMEPATH=\Users\strannik
APPDATA=C:\Users\strannik\AppData\Roaming
TERM=cygwin
PROCESSOR_IDENTIFIER=x86 Family 6 Model 15 Stepping 13, GenuineIntel
WINDIR=C:\Windows
PUBLIC=C:\Users\Public
PROGRAMDATA=C:\ProgramData
USERDOMAIN=Palomnik
OS=Windows_NT
ALLUSERSPROFILE=C:\ProgramData
!::=::\
TEMP=/cygdrive/c/Users/strannik/AppData/Local/Temp
COMMONPROGRAMFILES=C:\Program Files\Common Files
QTJAVA=C:\Program Files\Java\jre1.6.0_07\lib\ext\QTJava.zip
USERNAME=strannik
PROCESSOR_LEVEL=6
PATH=/cygdrive/c/Windows/system32:/cygdrive/c/Windows:/cygdrive/c/Windows/System
32/Wbem:/cygdrive/c/Program Files/Microsoft SQL 
Server/90/Tools/binn/:/cygdrive/
c/Program Files/Common Files/GTK/2.0/bin:/cygdrive/c/Program 
Files/QuickTime/QTS
ystem/
FP_NO_HOST_CHECK=NO
PWD=/cygdrive/c/cygwin/bin
SYSTEMDRIVE=C:
USERPROFILE=C:\Users\strannik
LOGONSERVER=\\PALOMNIK
PROCESSOR_ARCHITECTURE=x86
LOCALAPPDATA=C:\Users\strannik\AppData\Local
!C:=C:\cygwin\bin
SHLVL=1
HOME=/cygdrive/c/Users/strannik
PATHEXT=.PY;.SCM;.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
HOMEDRIVE=C:
PROMPT=$P$G
COMSPEC=C:\Windows\system32\cmd.exe
TMP=/cygdrive/c/Users/strannik/AppData/Local/Temp
SYSTEMROOT=C:\Windows
PROCESSOR_REVISION=0f0d
CLASSPATH=.;C:\Program Files\Java\jre1.6.0_07\lib\ext\QTJava.zip
CONFIGSETROOT=C:\Windows\ConfigSetRoot
PROGRAMFILES=C:\Program Files
NUMBER_OF_PROCESSORS=2
SESSIONNAME=Console
COMPUTERNAME=PALOMNIK
OLDPWD=/cygdrive/c/cygwin
_=./env
bash-3.2$ pwd
/cygdrive/c/cygwin/bin
bash-3.2$ ./env
HOMEPATH=\Users\strannik
APPDATA=C:\Users\strannik\AppData\Roaming
TERM=cygwin
PROCESSOR_IDENTIFIER=x86 Family 6 Model 15 Stepping 13, GenuineIntel
WINDIR=C:\Windows
PUBLIC=C:\Users\Public
PROGRAMDATA=C:\ProgramData
USERDOMAIN=Palomnik
OS=Windows_NT
ALLUSERSPROFILE=C:\ProgramData
!::=::\
TEMP=/cygdrive/c/Users/strannik/AppData/Local/Temp
COMMONPROGRAMFILES=C:\Program Files\Common Files
QTJAVA=C:\Program Files\Java\jre1.6.0_07\lib\ext\QTJava.zip
USERNAME=strannik
PROCESSOR_LEVEL=6
PATH=/cygdrive/c/Windows/system32:/cygdrive/c/Windows:/cygdrive/c/Windows/System
32/Wbem:/cygdrive/c/Program Files/Microsoft SQL 
Server/90/Tools/binn/:/cygdrive/
c/Program Files/Common Files/GTK/2.0/bin:/cygdrive/c/Program 
Files/QuickTime/QTS
ystem/
FP_NO_HOST_CHECK=NO
PWD=/cygdrive/c/cygwin/bin
SYSTEMDRIVE=C:
USERPROFILE=C:\Users\strannik
LOGONSERVER=\\PALOMNIK
PROCESSOR_ARCHITECTURE=x86
LOCALAPPDATA=C:\Users\strannik\AppData\Local
!C:=C:\cygwin\bin
SHLVL=1
HOME=/cygdrive/c/Users/strannik
PATHEXT=.PY;.SCM;.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
HOMEDRIVE=C:
PROMPT=$P$G
COMSPEC=C:\Windows\system32\cmd.exe
TMP=/cygdrive/c/Users/strannik/AppData/Local/Temp
SYSTEMROOT=C:\Windows
PROCESSOR_REVISION=0f0d
CLASSPATH=.;C:\Program Files\Java\jre1.6.0_07\lib\ext\QTJava.zip
CONFIGSETROOT=C:\Windows\ConfigSetRoot
PROGRAMFILES=C:\Program Files
NUMBER_OF_PROCESSORS=2
SESSIONNAME=Console
COMPUTERNAME=PALOMNIK
OLDPWD=/cygdrive/c/cygwin
_=./env
bash-3.2$

I tried a complete uninstall and reinstall but have the same problem.  I 
used to have /home/strannik as a home directory.  I could go back to 
that or use the C:\User\strannik, but I can't figure out how to get 
either one.

Any idea what could have gone wrong, or what to look for?
(TIA)

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple