CGIWrap - Installation Instructions

Quick Installation

Look at the notes to see if there are any hints for your platform.

Issue "./configure --help" to find out the various configuration options. You will need to specify some of them. At the very least, you will want to specify "--with-httpd-user=USERID".

Type "./configure <options>" with whatever options you need..

Type "make"

If you specified the installation directory in the options, you can type "make install" to do all the following steps.

Copy cgiwrap executable to your servers cgi-bin directory

Make cgiwrap owned by root, executable by all, and setuid. (Note: This step must be performed while logged in as "root")

chown root cgiwrap
chmod 4755 cgiwrap

Hardlink or symlink nph-cgiwrap, nph-cgiwrapd, cgiwrapd to cgiwrap in the cgi-bin directory.

ln [-s] cgiwrap cgiwrapd
ln [-s] cgiwrap nph-cgiwrap
ln [-s] cgiwrap nph-cgiwrapd

You can, if you wish, install it with less permissive permissions. (Eg. 4750) But if you do this, make sure that the group of cgiwrap is the same as the group that the server runs as.

*VERY IMPORTANT* - Do NOT allow any non-trusted user to run scripts directly out of the main cgi-bin directory, as this will allow them to use cgiwrap to run any of the other users scripts. The reason for this is that if they can run scripts as the same userid as the web server, they can subvert some of cgiwrap's security checks to allow them to run other users scripts. I recommend not running ANY scripts on the web server directly, once you have cgiwrap installed.

Configuration Options

The following are options available with the 'configure' command. Items in boldface are highly recommended. Defaults can be seen by issuing './configure --help' or by looking at the 'config.h' file after you have run 'configure'.

At an absolute minimum, you will probably want to specify the '--with-install-dir' and '--with-httpd-user' options.

path to perl executable to use
Specify the name of the local contact
Specify the local contact's email address
Specify the local contact's phone number
Specify a URL for the local contact
Specify a URL for this site
Specify a URL for a local copy of the cgiwrap docs
Add the '-Wall' option for compilation with gcc, this is intended primarily for development debugging.
group to install cgiwrap as
path to installation directory - this should be the path to your server's cgi-bin directory
path relative to home dir for cgi scripts
define what userid the web server is running as - this is required
don't check to make sure cgiwrap is being run by server userid - this is not recommended
disable check for matching owner
disable check for matching group
disable check for setuid script
disable check for setgid script
disable check for group writable script
disable check for world writable script
disable check for symlinked script
enable check for a valid user shell
--with-minimum-uid=UID set the minimum uid of user that can use cgiwrap
enable logging script execution to syslog
enable logging script execution to file
prevent users from storing scripts in subdirs
don't redirect stderr to stdout in scripts
disable use of initgroups() to clear non-userid auxilliary groups
disable use of setgroups() to add userid's auxilliary groups
use a file to rewrite user directories
don't fix the PATH_TRANSLATED variable (pre 3.5 behavior)
set PATH environment variable to STRING
set TZ environment variable to STRING
limit cpu time with setrlimit
limit total virtual memory with setrlimit
limit total available memory with setrlimit
limit writable file size with setrlimit
limit data segment size with setrlimit
limit stack segment size with setrlimit
limit core file size with setrlimit
limit resident set size with setrlimit
limit number of processes with setrlimit
limit number of open files with setrlimit
limit lockable memory with setrlimit
limit cgiwrap usage
limit cgiwrap usage
allow specifying hosts in allow/deny files
enable afs setpag() support

Password Protected Installation

The following are pecial additional instructions for installing a copy of cgiwrap that allows users to create access controlled scripts. For this to work, you will need to have a single common password file that will be used by all authenticated scripts.

Re run configure, specify "public_html/auth-cgi-bin" instead of "public_html/cgi-bin" for the cgi directory.

Type make.

Create a new server cgi-bin directory called "auth-cgi-bin", and install this new copy of cgiwrap into that directory the same way you installed it into the cgi-bin directory. (4 copies, and set permissions). You will now be able to use the url: http://server/auth-cgi-bin/cgiwrap...

To enable access control, place a .htaccess or equivalent file in the auth-cgi-bin directory where cgiwrap is located, that requires authentication to get at any file in that directory, but will allow any valid user to get through.

Now, your users can simply check: 1. That their script was executed by them (eg. check the real uid of the script to make sure someone else wasn't running it by hand) 2. That the REMOTE_USER environment variable contains a user name that they want to allow to access the script.

Supplementary Configuration

If you enabled the access file checking, you need to make sure and create the necessary files.

If you enabled the user directory rewriting feature, you need to create the configuration file that you specified in the configure run.