IOError: (13, 'Permission denied')

[bin]

How to Reproduce

While doing a POST operation on /admin/ticket/versions, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{'__FORM_TOKEN': u'c5764efb9fcafee826e8aa7e',
 'apply': u'Apply changes',
 'cat_id': u'ticket',
 'default': u'beta 0.1',
 'panel_id': u'versions',
 'path_info': None}

User Agent was: Mozilla/5.0 (Windows; U; Windows NT 5.1; fr; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3 GTB5 (.NET CLR 3.5.30729)

System Information

Trac	0.11.4
Python	2.6 (r26:66714, Jun 8 2009, 16:07:26) [GCC 4.4.0 20090506 (Red Hat 4.4.0-4)]
setuptools	0.6c9
SQLite	3.6.12
pysqlite	2.4.1
Genshi	0.5.1
mod_python	3.3.1
Pygments	1.1.1
Subversion	1.6.5 (r38866)
jQuery:	1.2.6

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/trac/web/main.py", line 435, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.6/site-packages/trac/web/main.py", line 205, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.6/site-packages/trac/admin/web_ui.py", line 113, in process_request
    path_info)
  File "/usr/lib/python2.6/site-packages/trac/ticket/admin.py", line 43, in render_admin_panel
    return self._render_admin_panel(req, cat, page, version)
  File "/usr/lib/python2.6/site-packages/trac/ticket/admin.py", line 296, in _render_admin_panel
    self.config.save()
  File "/usr/lib/python2.6/site-packages/trac/config.py", line 189, in save
    fileobj = open(self.filename, 'w')
IOError: [Errno 13] Permission denied: '/home/trac/Qos/conf/trac.ini'

[Remy Blank]

This is an InstallationIssue. Make sure your trac.ini and the directory where it resides are writable for the webserver.