trusty (5) cgi.5.gz

NAME

       cgi - Common Gateway Interface

DESCRIPTION

       The  Common  Gateway  Interface  is  a way to create dynamic web pages.  It defines rules for interaction
       between a program and the web server while the server talks to the client.  There are some  ways  to  use
       it.

ENVIRONMENT

       Normally  the webserver sets several environment variables to give some information to the CGI program so
       it can determine various stuff.

       AUTH_TYPE
              This reflects the authentification method used to validate a user.

       CONTENT_LENGTH
              The length of the data in bytes passed to the CGI program through standard input.  This is used by
              the POST method.

       CONTENT_TYPE
              The MIME type of the query data, such as "text/html", optional.

       DOCUMENT_ROOT
              This reflects the document root directory of the webserver.

       GATEWAY_INTERFACE
              Reflects the version of the Common Gateway Interface that the server is using

       HTTP_ACCEPT
              A comma separated list of MIME type that the client is willing to accept.

       HTTP_FROM
              The  email  address  of  the  user issuing the information request.  This is not supported by most
              browsers.

       HTTP_REFERER
              Reflects the URL from which this CGI program was accessed.

       HTTP_USER_AGENT
              The name, version and libraries of the browser making the request.  This information can  be  used
              to determine if the browser is capable of graphics and is able to display frames and tables.

       PATH_INFO
              This  shows  extra information that was passed to the CGI program via command line.  Normally it's
              empty or non-existent.

       PATH_TRANSLATED
              The translated path on the local filesystem.

       QUERY_STRING
              This variable refers to additional arguments that were appended to the CGI program - normally with
              the '?' sign.

       REMOTE_ADDR
              This refers to the host from which the information request was issued, as IP number.

       REMOTE_HOST
              This refers to the host from which the information request was issued.

       REMOTE_USER
              The authenticated name of the user.

       REQUEST_METHOD
              This  refers to the method with which the information request was issued.  Normally this is either
              GET or POST.

       SCRIPT_NAME
              The virtual name of the script being executed.

       SERVER_NAME
              The server's hostname or IP number.  This may be used to determine the correct paths or  resulting
              HTML code for CGI programs that are used on the same machine for several servers.

       SERVER_PROTOCOL
              This  is the name and version of the information protocol the request came in with.  Normally this
              is "HTTP/1.0" or "HTTP/1.1".

       SERVER_PORT
              This refers to the TCP/IP port on which the webserver is running.

       SERVER_SOFTWARE
              This reflects the name and revision of the webserver software.

AUTHOR

       This CGI library is written by Martin Schulze <joey@infodrom.org>.  If you have additions or improvements
       please get in touch with him.

SEE ALSO

       cgiDebug(3), cgiHeader(3), cgiSetType(3), cgiSetHeader(3), cgiGetValue(3), cgiGetVariables(3).