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#!/usr/bin/python # 07-07-04 # v1.0.0 # cgi-shell.py # A simple CGI that executes arbitrary shell commands. # Copyright Michael Foord # You are free to modify, use and relicense this code. # No warranty express or implied for the accuracy, fitness to purpose or otherwise for this code.... # Use at your own risk !!! # E-mail michael AT foord DOT me DOT uk # Maintained at www.voidspace.org.uk/atlantibots/pythonutils.html """ A simple CGI script to execute shell commands via CGI. """ ################################################################ # Imports try: import cgitb; cgitb.enable() except: pass import sys, cgi, os sys.stderr = sys.stdout from time import strftime import traceback from StringIO import StringIO from traceback import print_exc ################################################################ # constants fontline = '' versionstring = 'Version 1.0.0 7th July 2004' if os.environ.has_key("SCRIPT_NAME"): scriptname = os.environ["SCRIPT_NAME"] else: scriptname = "" METHOD = '"POST"' ################################################################ # Private functions and variables def getform(valuelist, theform, notpresent=''): """This function, given a CGI form, extracts the data from it, based on valuelist passed in. Any non-present values are set to '' - although this can be changed. (e.g. to return None so you can test for missing keywords - where '' is a valid answer but to have the field missing isn't.)""" data = {} for field in valuelist: if not theform.has_key(field): data[field] = notpresent else: if type(theform[field]) != type([]): data[field] = theform[field].value else: values = map(lambda x: x.value, theform[field]) # allows for list type values data[field] = values return data theformhead = """cgi-shell.py - a CGI by Fuzzyman

Welcome to cgi-shell.py -
a Python CGI

By Fuzzyman
"""+fontline +"Version : " + versionstring + """, Running on : """ + strftime('%I:%M %p, %A %d %B, %Y')+'.

' theform = """

Enter Command





""" bodyend = '' errormess = '

Something Went Wrong


'

################################################################
# main body of the script

if __name__ == '__main__':
    print "Content-type: text/html"         # this is the header to the server
    print                                   # so is this blank line
    form = cgi.FieldStorage()
    data = getform(['cmd'],form)
    thecmd = data['cmd']
    print theformhead
    print theform
    if thecmd:
        print '


'
        print 'Command : ', thecmd, '

'
        print 'Result : 

'
        try:
            child_stdin, child_stdout = os.popen2(thecmd)
            child_stdin.close()
            result = child_stdout.read()
            child_stdout.close()
            print result.replace('\n', '
')

        except Exception, e:                      # an error in executing the command
            print errormess
            f = StringIO()
            print_exc(file=f)
            a = f.getvalue().splitlines()
            for line in a:
                print line

    print bodyend


"""
TODO/ISSUES



CHANGELOG

07-07-04        Version 1.0.0
A very basic system for executing shell commands.
I may expand it into a proper 'environment' with session persistence...
"""
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