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    Revision 816 - (hide annotations) (download) (as text)
    Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
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    -updated to busybox-1.13.4
    1 niro 816 <html><head><title>CGI Command line options</title></head><body><h1><img alt="" src="cl_files/CGIlogo.gif"> CGI Command line options</h1>
    2     <hr> <p>
    3    
    4     </p><h2>Specification</h2>
    5    
    6     The command line is only used in the case of an ISINDEX query. It is
    7     not used in the case of an HTML form or any as yet undefined query
    8     type. The server should search the query information (the <code>QUERY_STRING</code> environment variable) for a non-encoded
    9     = character to determine if the command line is to be used, if it
    10     finds one, the command line is not to be used. This trusts the clients
    11     to encode the = sign in ISINDEX queries, a practice which was
    12     considered safe at the time of the design of this specification. <p>
    13    
    14     For example, use the <a href="http://hoohoo.ncsa.uiuc.edu/cgi-bin/finger">finger script</a> and the ISINDEX interface to look up "httpd". You will see that the script will call itself with <code>/cgi-bin/finger?httpd</code> and will actually execute "finger httpd" on the command line and output the results to you.
    15     </p><p>
    16     If the server does find a "=" in the <code>QUERY_STRING</code>,
    17     then the command line will not be used, and no decoding will be
    18     performed. The query then remains intact for processing by an
    19     appropriate FORM submission decoder.
    20     Again, as an example, use <a href="http://hoohoo.ncsa.uiuc.edu/cgi-bin/finger?httpd=name">this hyperlink</a> to submit <code>"httpd=name"</code> to the finger script. Since this <code>QUERY_STRING</code>
    21     contained an unencoded "=", nothing was decoded, the script didn't know
    22     it was being submitted a valid query, and just gave you the default
    23     finger form.
    24     </p><p>
    25     If the server finds that it cannot send the string due to internal
    26     limitations (such as exec() or /bin/sh command line restrictions) the
    27     server should include NO command line information and provide the
    28     non-decoded query information in the environment
    29     variable <a href="http://hoohoo.ncsa.uiuc.edu/cgi/env.html#query"><code>QUERY_STRING</code></a>. </p><p>
    30     </p><hr>
    31     <h2>Examples</h2>
    32    
    33     Examples of the command line usage are much better <a href="http://hoohoo.ncsa.uiuc.edu/cgi/examples.html">demonstrated</a> than explained. For these
    34     examples, pay close attention to the script output which says what
    35     argc and argv are. <p>
    36    
    37     </p><hr>
    38    
    39     <a href="http://hoohoo.ncsa.uiuc.edu/cgi/interface.html"><img alt="[Back]" src="cl_files/back.gif">Return to the
    40     interface specification</a> <p>
    41    
    42     CGI - Common Gateway Interface
    43     </p><address><a href="http://hoohoo.ncsa.uiuc.edu/cgi/mailtocgi.html">cgi@ncsa.uiuc.edu</a></address>
    44    
    45    
    46     </body></html>