Question

Neither the wikiHome.gif image in testenv nor the robot image from TWikiLogos is rendering.

I have read the 3 or 4 existing topics on images not rendering, but the syntax errors they mention do not exist in my version.

Apache appears to be wanting to treat files in these directories as CGIs, but I cannot understand why.

The error in the Apache error_log is:

[Mon Aug 09 13:26:44 2004] [error] [client 127.0.0.1] Options ExecCGI is off in this directory: /home/httpd/twiki/pub/wikiHome.gif, referer: http://localhost/twiki/bin/testenv

Some permissions stuff:

[root@ftgme2 ftg]# cd /home
[root@ftgme2 home]# ls -ld httpd
drwxr-xr-x  3 apache apache 4096 Aug  2 19:50 httpd/
[root@ftgme2 home]# cd httpd
[root@ftgme2 httpd]# ls -l
total 4
drwxrwxr-x  7 apache apache 4096 Aug  4 12:11 twiki/
[root@ftgme2 httpd]# cd twiki
[root@ftgme2 twiki]# ls -l
total 564
-rwxr-xr-x  1 apache apache    625 Aug  5 21:09 99_twiki.conf*
drwxrwxr-x  2 apache apache   4096 Aug  9 09:16 bin/
drwxr-xr-x  8 apache apache   4096 Aug  9 13:33 data/
-rwxr-xr-x  1 apache apache    782 Jan  4  2003 index.html*
-rwxr-xr-x  1 apache apache    212 Aug  4 12:20 install.sh*
drwxr-xr-x  4 apache apache   4096 Dec 11  2002 lib/
-rwxr-xr-x  1 apache apache  19440 Feb  1  2003 license.txt*
drwxr-xr-x  8 apache apache   4096 Aug  9 13:33 pub/
-rwxr-xr-x  1 apache apache   4334 Feb  1  2003 readme.txt*
drwxr-xr-x  2 apache apache   4096 Aug  9 13:33 templates/
-rwxr-xr-x  1 apache apache 453477 Feb  1  2003 TWikiDocumentation.html*
-rwxr-xr-x  1 apache apache  52417 Feb  1  2003 TWikiHistory.html*
[root@ftgme2 twiki]# cd pub
[root@ftgme2 pub]# ls -l
total 32
-rw-r--r--  1 apache apache 1078 Jan 14  2000 favicon.ico
drw-r--r--  2 apache apache 4096 Feb  1  2003 icn/
drw-r--r--  3 apache apache 4096 Nov 18  2002 Know/
drw-r--r--  2 apache apache 4096 Apr  7  2002 Main/
drw-r--r--  2 apache apache 4096 Apr 21  2002 Sandbox/
drw-r--r--  2 apache apache 4096 Dec  4  2001 Trash/
drw-r--r--  8 apache apache 4096 Nov 18  2002 TWiki/
-rw-r--r--  1 apache apache 2877 Jun  8  1999 wikiHome.gif
[root@ftgme2 pub]#

The perl script mentioned in the install docs was run to change "nobody:" to "apache:".

Here are the httpd.conf additions, added by means of a 99_twiki.conf file in /etc/httpd/conf.d:

ScriptAlias /twiki/bin/ "/home/httpd/twiki/bin/"
ScriptAlias /wiki "/home/httpd/twiki/bin/view"
Alias /twiki/ "/home/httpd/twiki/"
<Directory "/home/httpd/twiki/bin">
  Options +ExecCGI
  SetHandler cgi-script
  Allow from all
  AllowOverride All
</Directory>
<Directory "/home/httpd/twiki">
  Options +ExecCGI
  SetHandler cgi-script
  Allow from all
</Directory>
<Directory "/home/httpd/twiki/pub">
  Options FollowSymLinks +Includes
  AllowOverride None
  Allow from all
</Directory>
<Directory "/home/httpd/twiki/data">
  deny from all
</Directory>
<Directory "/home/httpd/twiki/templates">
  deny from all
</Directory>

The TWiki.cfg is the distribution one with the hostname changed to mine.

Here is the .htaccess file from twiki/bin:

# bin/.htaccess.txt
#
# Controls access to TWiki scripts - rename this to '.htaccess' to make
# Apache use it.

# Use CGI & Perl to handle all files in 'bin' directory, i.e. run as scripts
# - this should remove the need to rename files to end in '.pl' etc,
# if your web hosting provider permits this.  Remove if using mod_perl.
#SetHandler cgi-script

# Password file for TWiki users
#
# The path here must be a system file pathname, not a URL - first part should 
# match the $dataDir setting in TWiki.cfg
AuthUserFile /home/httpd/twiki/data/.htpasswd
AuthName 'Enter your WikiName: (First name and last name, no space, no dots, capitalized, e.g. JohnSmith). Cancel to register if you do not have one.'
AuthType Basic

# File to return on access control error (e.g. wrong password)
# The path here must be a URL path, not a file pathname - first part should 
# match the $scriptUrlPath in TWiki.cfg
ErrorDocument 401 /twiki/bin/oops/TWiki/TWikiRegistration?template=oopsauth

<Files ~ "[^/]*\.html$">
       SetHandler blabla
       allow from all
</Files>

<Files "viewauth">
       require valid-user
</Files>

<Files "edit">
       require valid-user
</Files>

<Files "preview">
       require valid-user
</Files>

<Files "save">
       require valid-user
</Files>

<Files "attach">
       require valid-user
</Files>

<Files "upload">
       require valid-user
</Files>

<Files "rename">
       require valid-user
</Files>

<Files "manage">
       require valid-user
</Files>

<Files "installpasswd">
       require valid-user
</Files>

<Files "*">
       allow from all
</Files>

Here is the output of the CVS version of testenv:

Test the environment for TWiki
Please read the TWikiInstallationNotes for more information on TWiki installation.
Environment variables:
DOCUMENT_ROOT   /var/www/html
GATEWAY_INTERFACE   CGI/1.1
HTTP_ACCEPT   text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
HTTP_ACCEPT_CHARSET   ISO-8859-1,utf-8;q=0.7,*;q=0.7
HTTP_ACCEPT_ENCODING   gzip,deflate
HTTP_ACCEPT_LANGUAGE   en-us,en-gb;q=0.8,en;q=0.5,fr;q=0.3
HTTP_CACHE_CONTROL   max-age=0
HTTP_CONNECTION   keep-alive
HTTP_HOST   localhost
HTTP_KEEP_ALIVE   300
HTTP_USER_AGENT   Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7) Gecko/20040708
PATH   /sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin
QUERY_STRING   
REMOTE_ADDR   127.0.0.1
REMOTE_PORT   35482
REQUEST_METHOD   GET
REQUEST_URI   /twiki/bin/testenv
SCRIPT_FILENAME   /home/httpd/twiki/bin/testenv
SCRIPT_NAME   /twiki/bin/testenv
SCRIPT_URI   http://ftgme2.selectbs.com/twiki/bin/testenv
SCRIPT_URL   /twiki/bin/testenv
SERVER_ADDR   127.0.0.1
SERVER_ADMIN   root@localhost
SERVER_NAME   ftgme2.selectbs.com
SERVER_PORT   80
SERVER_PROTOCOL   HTTP/1.1
SERVER_SIGNATURE   
Apache-AdvancedExtranetServer/2.0.50 (Mandrakelinux/3mdk) mod_perl/1.99_14 Perl/v5.8.5 auth_mysql/1.11 mod_auth_pgsql/2.0.2b1 auth_radius/1.7PR1 mod_layout/4.0.1a mod_ssl/2.0.50 OpenSSL/0.9.7d DAV/2 PHP/4.3.8 mod_auth_remote/0.1 mod_auth_shadow/2.0 Server at ftgme2.selectbs.com Port 80
SERVER_SOFTWARE   Apache-AdvancedExtranetServer/2.0.50 (Mandrakelinux/3mdk) mod_perl/1.99_14 Perl/v5.8.5 auth_mysql/1.11 mod_auth_pgsql/2.0.2b1 auth_radius/1.7PR1 mod_layout/4.0.1a mod_ssl/2.0.50 OpenSSL/0.9.7d DAV/2 PHP/4.3.8 mod_auth_remote/0.1 mod_auth_shadow/2.0
CGI Setup:
Operating system:   Unix (linux)
Perl version:   5.8.5
@INC library path:   ../lib
/usr/lib/perl5/5.8.5/i386-linux-thread-multi
/usr/lib/perl5/5.8.5
/usr/lib/perl5/site_perl/5.8.5/i386-linux-thread-multi
/usr/lib/perl5/site_perl/5.8.5
/usr/lib/perl5/site_perl
/usr/lib/perl5/vendor_perl/5.8.5/i386-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.5
/usr/lib/perl5/vendor_perl/5.8.4/i386-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.4
/usr/lib/perl5/vendor_perl/5.8.3/i386-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.3
/usr/lib/perl5/vendor_perl/5.8.2/i386-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.2
/usr/lib/perl5/vendor_perl/5.8.1/i386-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.1
/usr/lib/perl5/vendor_perl
.
   Note: This is the Perl library path, used to load TWiki modules, third-party modules used by some plugins, and Perl built-in modules.
TWiki module in @INC path:   
   OK, TWiki.pm found (TWiki version: 01 Feb 2003)
Required Perl modules:   
   CGI (3.05)
   CGI::Carp (1.28)
   File::Copy (2.08)
   File::Spec (0.87)
   FileHandle (2.01)
Optional Perl modules:   
   Algorithm::Diff (1.01)
   MIME::Base64 (3.01)
   POSIX (1.08)
   Encode (2.01)
   Note: Optional module 'Unicode::MapUTF8' not installed - check TWiki documentation to see if your configuration needs this module.
   Note: Optional module 'Unicode::Map' not installed - check TWiki documentation to see if your configuration needs this module.
   Note: Optional module 'Unicode::Map8' not installed - check TWiki documentation to see if your configuration needs this module.
   Note: Optional module 'Jcode' not installed - check TWiki documentation to see if your configuration needs this module.
   Digest::MD5 (2.33)
   Digest::SHA1 (2.10)
   MIME::Base64 (3.01)
   Net::SMTP (2.29)
PATH_INFO:   
   Note: For a URL such as http://localhost/twiki/bin/testenv/foo/bar, the correct PATH_INFO is /foo/bar, without any prefixed path components. Test this now - particularly if you are using mod_perl, Apache or IIS, or are using a web hosting provider. The page resulting from the test link should have a PATH_INFO of /foo/bar.
mod_perl:   Not used for this script (mod_perl loaded into Apache)
User:   apache
   Note: Your CGI scripts are executing as this user.
   Warning: Since your CGI script is not running as user nobody, you need to change the locks in the *,v RCS files of the TWiki distribution from nobody to apache. Otherwise, changes to topics will not be logged by RCS.
Group(s):   apache apache
Test of TWiki.cfg Configuration:
$defaultUrlHost:   http://ftgme2.selectbs.com
   Note: This must match the protocol and host part (with optional port number) of the TWiki URL.
   Warning: This does not match HTTP_HOST
$scriptUrlPath:   /twiki/bin
   Note: This must match the 'cgi-bin' part of the URL used to access the TWiki cgi-bin directory.
$pubUrlPath:   /twiki/pub
   Note: This must be the URL of the public directory.This is not set correctly if the /twiki/pub/wikiHome.gif image below is broken:
$pubDir:   /home/httpd/twiki/pub
   Note: This is the public directory, as seen from the file system. It must correspond to $pubUrlPath.
$templateDir:   /home/httpd/twiki/templates
   Note: This is the TWiki template directory, as seen from the file system.
   Warning: Security issue: This directory should not be writable by the apache user.
$dataDir:   /home/httpd/twiki/data
   Note: This is the data directory where TWiki stores all topics.
$mailProgram:   /usr/sbin/sendmail -t -oi -oeq
   Note: This is the mail program TWiki uses to send mail.
$rcsDir:   /usr/bin
   Note: This is the directory where RCS is located.
RCS Version:   5.7
   Note: This is the version of RCS which will be used.
$lsCmd:   /bin/ls
   Note: This is the file list program TWiki uses to list topics.
$egrepCmd:   /bin/egrep
   Note: This is a program TWiki uses for search.
$fgrepCmd:   /bin/fgrep
   Note: This is a program TWiki uses for search.
$safeEnvPath:   /bin:/usr/bin
   Note: This is used to initialise the PATH variable, and is used to run the 'diff' program used by RCS, as well as to run shell programs such as Bourne shell or 'bash'.
Path and Shell Environment
Original PATH:   /sbin:/usr/sbin:/bin:/usr/bin:/usr/X11R6/bin
   Note: This is the PATH value passed in from the web server to this script - it is reset by TWiki scripts to the PATH below, and is provided here for comparison purposes only.
Current PATH:   /bin:/usr/bin
   Note: This is the actual PATH setting that will be used by Perl to run programs. It is normally identical to $safeEnvPath, unless that variable is empty.
diff:   GNU diff was found on the PATH - this is the recommended diff tool.
   Note: The 'diff' command is used by RCS to compare files. 

Environment

TWiki version:	01 Feb 2003
TWiki plugins:	as distributed
Server OS:	Mandrake Linux 10.0
Web server:	Apache-AdvancedExtranetServer/2.0.50 (Mandrakelinux/3mdk) mod_perl/1.99_14
Perl version:	5.8.5
Client OS:	Mandrake Linux 10.0
Web Browser:	Mozilla 1.7

-- FrankGriffin - 09 Aug 2004

Follow-up

Can you type in the url path to the wikiHome.gif image in the browser and see it? Do you get the same error?

I'm not sure why you have:

<Directory "/home/httpd/twiki">
  Options +ExecCGI
  SetHandler cgi-script
  Allow from all
</Directory>

in your httpd.conf. This should not be required, and may well be causing the problem (setting handler type cgi-script in the pub directory).

-- CrawfordCurrie - 14 Aug 2004

Answer