updating Bundle::CPAN issues

mikejones has asked for the wisdom of the Perl Monks concerning the following question:

I am running this command:

$ perl -MCPAN -e 'install Bundle::CPAN;'
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and it hangs on the taint check. So I tried it manually and was receiving permission denied errors. See the bottom.

$ perl -V
Summary of my perl5 (revision 5 version 8 subversion 7) configuration:
  Platform:
    osname=cygwin, osvers=1.5.18(0.13242), archname=cygwin-thread-mult
+i-64int
    uname='cygwin_nt-5.1 inspiron 1.5.18(0.13242) 2005-07-02 20:30 i68
+6 unknown unknown cygwin '
    config_args='-de -Dmksymlinks -Duse64bitint -Dusethreads -Uusemyma
+lloc -Doptimize=-O3 -Dman3ext=3pm
 -Dusesitecustomize'
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snip

Checking if your kit is complete...
Looks good
Writing Makefile for Cwd
CPAN: YAML loaded ok (v0.65)
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snip

chmod 644 blib/arch/auto/Cwd/Cwd.bs
  KWILLIAMS/PathTools-3.25.tar.gz
  /usr/bin/make -- OK
Running make test
/usr/bin/perl.exe "-MExtUtils::Command::MM" "-e"
"test_harness(0, 'blib/lib', 'blib/arch')" t/*.t
t/crossplatform....ok
        7/50 skipped: various reasons
t/cwd..............ok
t/Functions........ok
t/rel2abs2rel......ok
t/Spec.............ok
        90/491 skipped: various reasons
t/taint............
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$ make install
Warning: You do not have permissions to install into
/usr/lib/perl5/5.8/cygwin at /usr/lib/perl5/5.8/Ex
tUtils/Install.pm line 114.
Cannot forceunlink
/usr/lib/perl5/5.8/cygwin/auto/Cwd/Cwd.dll: Permission
denied at /usr/lib/perl5/5.8/
File/Find.pm line 907
make: *** [pure_perl_install] Error 13
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Any help or ideas? thank you

Comment on updating Bundle::CPAN issues Select or Download Code

Replies are listed 'Best First'.
Re: updating Bundle::CPAN issues by shigetsu (Hermit) on Jul 06, 2007 at 18:26 UTC
First of, you shouldn't run the CPAN shell update as user, but as super-user (root) - that should at least not give you permission errors while trying to install the relevant bits. Are you sure "t/taint" is hanging or just taking some time to complete? What happens if you try `'force install Bundle::CPAN'` within the CPAN shell?	[reply] [d/l]
Re^2: updating Bundle::CPAN issues by webfiend (Vicar) on Jul 06, 2007 at 19:09 UTC
The super-user thing is generally true, except that you can do a local-user-only install of Cygwin.	[reply]
Re: updating Bundle::CPAN issues by randyk (Parson) on Jul 06, 2007 at 18:33 UTC
The same sort of problem arises with ActivePerl, I think because the dll is in use at the time. What works there is to manually delete (or move out of the way) /usr/lib/perl5/5.8/cygwin/auto/Cwd/Cwd.dll and do a `make install` again.	[reply]
Re^2: updating Bundle::CPAN issues by sgt (Deacon) on Jul 06, 2007 at 20:09 UTC
yes. I am currently building a solution to generate periodically a cygperl distrib with a lot of extra modules and I came across this problem which breaks badly (sadly) the CPAN toolchain. it seems windows is using some kind of cache and even if the perl executable does an unload-reload of a given dll (using I guess the one in the local install dir), windows gives an error or maybe the unload mechanism does not work on cygwin...(or windows) one fix is check blib for *dll and move the dll to .RM and generate a (rm) script to run at exit a better one would be to fix EU::MM for cygwin, or replace the equivalent to the "install" cmd with a smarter equivalent cheers --stephan	[reply]
Re: updating Bundle::CPAN issues by mrpeabody (Friar) on Jul 07, 2007 at 04:46 UTC
On Cygwin, CPAN can't be upgraded while it is running. It should give a Cygwin-specific warning during the install procedure. The workaround is quitting CPAN and doing the make-test-install dance from the command line. If you still get "can't unlink" errors, rename the dll and try again. Doing this from within Perl might be a challenge.	[reply]