Description of problem:


Version-Release number of selected component (if applicable):
$ rpm -q yum-utils
yum-utils-1.1.7-1.fc7

How reproducible:
cd to a directory where the user does not have write permisions and attempt to
use yumdownloader to download an rpm to that directory

Steps to Reproduce:
$ /var/opt
$ yumdownloader --source wordpress
  
Actual results:
$ yumdownloader --source wordpress
Loading "fastestmirror" plugin
Loading "skip-broken" plugin
Loading "refresh-updatesd" plugin
Loading "fedorakmod" plugin
Loading "kernel-module" plugin
Loading "protectbase" plugin
Loading "priorities" plugin
Loading mirror speeds from cached hostfile
0 packages excluded due to repository protections
0 packages excluded due to repository priority protections
Enabling livna-source repository
0 packages excluded due to repository protections
0 packages excluded due to repository priority protections
Enabling fedora-source repository
0 packages excluded due to repository protections
0 packages excluded due to repository priority protections
Enabling updates-source repository
0 packages excluded due to repository protections
0 packages excluded due to repository priority protections
wordpress-2.2.3-0.fc7.src 100% |=========================|    0 B    00:00     
Traceback (most recent call last):
  File "/usr/bin/yumdownloader", line 215, in <module>
    util = YumDownloader()
  File "/usr/bin/yumdownloader", line 41, in __init__
    self.main()
  File "/usr/bin/yumdownloader", line 71, in main
    self.downloadPackages(opts)
  File "/usr/bin/yumdownloader", line 175, in downloadPackages
    path = repo.getPackage(download)
  File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 629, in getPackage
    cache=cache
  File "/usr/lib/python2.5/site-packages/yum/yumRepo.py", line 607, in _getFile
    http_headers=headers,
  File "/usr/lib/python2.5/site-packages/urlgrabber/mirror.py", line 411, in urlgrab
    return self._mirror_try(func, url, kw)
  File "/usr/lib/python2.5/site-packages/urlgrabber/mirror.py", line 397, in
_mirror_try
    return func_ref( *(fullurl,), **kwargs )
  File "/usr/lib/python2.5/site-packages/urlgrabber/grabber.py", line 927, in
urlgrab
    return self._retry(opts, retryfunc, url, filename)
  File "/usr/lib/python2.5/site-packages/urlgrabber/grabber.py", line 845, in _retry
    r = apply(func, (opts,) + args, {})
  File "/usr/lib/python2.5/site-packages/urlgrabber/grabber.py", line 915, in
retryfunc
    fo._do_grab()
  File "/usr/lib/python2.5/site-packages/urlgrabber/grabber.py", line 1196, in
_do_grab
    else: new_fo = open(self.filename, 'wb')
IOError: [Errno 13] Permission denied: u'./wordpress-2.2.3-0.fc7.src.rpm'

Expected results:

yumdownloader should output an error stating it does not have write permissions
to the destination directory, or something similar.

Additional Information:
Also filed the bug upstream in the yum bugzilla.  Bug 846
https://devel.linux.duke.edu/bugzilla/show_bug.cgi?id=846