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From: Andrew DeFaria <Andrew AT DeFaria DOT com>
Subject:  Re: Changing HOME for PERL
Date:  Thu, 27 Aug 2009 08:44:38 -0700
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Dexter_Michael AT emc DOT com wrote:
> Yes that is SolidState Perl on the C drive.
Ah.... That'd be ActiveState, not SolidState.
> /usr/bin is in the front.
That makes no sense but perhaps it's a clue. As Jeremy mentioned, which 
takes each PATH component and checks to see if there's a executable of 
that name in that path component. If /usr/bin is in the front then 
theoretically it should see /usr/bin/perl and say "Ah ha! That's where 
that is" and report back /usr/bin/perl.
> dextem AT USENDEXTEML1C /usr/bin/perl
> $ echo $PATH
> /usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/cygdrive/c/Program
> Files/EMC/Centera/4_0/GlobalServices/lib:/cygdrive/c/Program
> Files/EMC/Centera/4_0/GlobalService
> s/bin:/cygdrive/c/PERL/BIN/:/cygdrive/c/WINNT/SYSTEM32:/cygdrive/c/WINNT
> :/cygdrive/c/WINNT/SYSTEM32/WBEM:/cygdrive/c/JAVASOFT/JRE/1.4.2_06/BIN:/
> cygdrive/c/JAVAS
> OFT/JDK/1.4.2_06/BIN:/cygdrive/c/RATIONAL/CLEARCASE/ETC:/cygdrive/c/RATI
> ONAL/CLEARCASE/ETC/UTILS:/cygdrive/c/RATIONAL/ClearQuest:/cygdrive/c/Mic
> rosoftVisualStud
> io.NET2003/Common7/IDE:/cygdrive/c/MicrosoftVisualStudio.NET2003/Vc7/BIN
> :/cygdrive/c/MicrosoftVisualStudio.NET2003/Common7/TOOLS:/cygdrive/c/Mic
> rosoftVisualStud
> io.NET2003/Common7/TOOLS/bin/prerelease:/cygdrive/c/MicrosoftVisualStudi
> o.NET2003/Common7/TOOLS/bin:/cygdrive/c/MicrosoftVisualStudio.NET2003/SD
> K/v1.1/bin:/cygd
> rive/c/WINNT/Microsoft.NET/Framework/v1.1.4322:/cygdrive/c/WINNT/SYSTEM:
> /cygdrive/c/ORACLE/92/bin:/cygdrive/c/oracle/jre/1.1.7/bin:/cygdrive/c/M
> icrosoftPlatform
> SDK/Bin:/cygdrive/c/MicrosoftPlatformSDK/Bin/winnt:/cygdrive/c/Program
> Files/Rational/ClearCase/bin:/cygdrive/c/Program
> Files/Rational/ClearCase/etc:/cygdrive/c
> /Program
> Files/Rational/ClearCase/etc/utils:/cygdrive/c/WINNT/system32/WindowsPow
> erShell/v1.0:/cygdrive/c/Program
> Files/Rational/common:/cygdrive/c/Program File
> s/EMC/Centera/4_0/GlobalServices/JCenteraVerify:/cygdrive/c/Program
> Files/Common Files/Roxio Shared/9.0/DLLShared/:"C:/Program Files/Common
> Files/EMC":/cygdrive
> /c/PROGRA~1/COMMON~1/EMC:/cygdrive/c/Program Files/Support
> Tools/:/cygdrive/c/Program Files/Common Files/Roxio
> Shared/DLLShared/:/cygdrive/c/Program Files/Quick
> Time/QTSystem/:/cygdrive/c/Program Files/Windows
> Imaging/:/cygdrive/c/Program Files/IDM Computer
> Solutions/UltraEdit/:/cygdrive/c/Program Files/IDM Computer Sol
> utions/UltraCompare/:/usr/lib/lapack
My god man that's the most polluted PATH I've seen yet! You have some 
duplication and a lot of unnecessary stuff (I mean really, does Roxio 
need to be in there?) I see you're using Clearcase - good boy! :-) But 
you have it listed several times.

When you get spare time you may wish to clean that up. I tend to keep 
Windows paths Windows like (e.g. "C:/Program 
Files/Rational/Clearcase/bin") and Posix paths Posix like (i.e. 
/usr/bin). This cuts down on PATH length as /cygdrive/c is much longer 
than C:/.
> dextem AT USENDEXTEML1C /usr/bin/perl
What's this?!? You're in the /usr/bin/perl directory? There isn't any 
/usr/bin/perl directly?!? Or there shouldn't be!
> $ /usr/bin/perl.exe -de 1
>
> Loading DB routines from perl5db.pl version 1.28
> Editor support available.
>
> Enter h or `h h' for help, or `man perldebug' for more help.
>
> main::(-e:1): 1
> DB<1> q
Actually I said /usr/bin/perl -de 1 not /usr/bin/perl.exe -de 1. Your 
shebang line doesn's say /usr/bin/perl.exe does it? Maybe exec(1) is 
getting confused between /usr/bin/perl.exe and /usr/bin/perl the 
directory? Note that executables, by Windows nature, end in .exe but 
Unix executables don't. So in order to avoid the ugliness, confusion and 
incompatibility of having to do ls.exe and rm.exe, etc. Cygwin treats ls 
as ls.exe. Likewise perl as perl.exe. However if exec(1) find that 
/usr/bin/perl exists in the filesystem as a directory, perhaps it tries 
to run that or says "Well that's not executable so let me look onward". 
If you have a /usr/bin/perl directory remove it and try again.
-- 
Andrew DeFaria <http://defaria.com>
Future historians will be able to study at the Gerald Ford Library; the 
Jimmy Carter Library; the Ronald Reagan Library and the Bill Clinton 
Adult Bookstore.


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