Re: [Pyparsing] parsing and extracting tac_plus.conf user data

[Asif I. <va...@gm...>]

On Sun, May 25, 2014 at 2:59 AM, Asif Iqbal <va...@gm...> wrote:

>
>
>
> On Sun, May 25, 2014 at 1:46 AM, Paul McGuire <pt...@au...> wrote:
>
>> Pyparsing only reports one because you only told it to get one.  Change
>> to:
>>
>>     result = OneOrMore(expr).parseString(data).asList()
>>
>
> I am using expr.scanString(data) instead to make sure only to pickup
> user block like user = foo { .. {..} .. }  and not get stuck if sees group
> = foo {.. {..} .. }
>

I am using this code

beginWith = Literal('user')

identifier = Word(alphas, alphanums)

expr = Group(beginWith + '=' + identifier + Optional(nestedCurlies))



> Here is a sample of how a real tac_plus.conf looks like and I am only
> parsing
> out the user blocks
>
> Here are some example tac_plus.conf file
>
> https://github.com/mkouhei/tacacs-plus/blob/master/debian/tac_plus.conf
>
> https://github.com/mirek186/BackUp/blob/master/tacProject/tac_plus.conf
>
>
>
>> and you'll process the rest of the file too.
>>
>> Also, you will find your results easier to process if you wrap expr in a
>> Group, as in:
>>
>>     expr = Group(Word(alphas) + '=' + Word(alphanums) +
>> Optional(nestedCurlies))
>>
>> -- Paul
>>
>>
>> -----Original Message-----
>> From: Asif Iqbal [mailto:va...@gm...]
>> Sent: Sunday, May 25, 2014 12:08 AM
>> To: pyp...@li...
>> Subject: [Pyparsing] parsing and extracting tac_plus.conf user data
>>
>> Hi All,
>>
>> I am trying to use pyparse to extract user data and it only picks up the
>> first block.
>>
>> Any idea what I am doing wrong? I am using python 2.7.6 on ubuntu trusty
>>
>> #!/usr/bin/python
>> import pprint, sys
>> #from pyparsing import Word, Literal, Forward, Group, ZeroOrMore, alphas
>> from pyparsing import *
>>
>> f = sys.argv[1]
>>
>> data = open(f,'r').read()
>>
>> nestedCurlies = nestedExpr('{','}')
>>
>> expr = Word(alphas) + '=' + Word(alphanums) + Optional(nestedCurlies)
>>
>> expr.ignore("#" + restOfLine)
>> result = expr.parseString(data).asList()
>>
>> pprint.pprint(result)
>>
>> Here is sample data file:
>>
>> user = aa06591 {
>>         pap = PAM
>>         login = PAM
>>     member = readonly
>>
>>     ## temporary commands so John can adjust resolver
>>     ## uplink speed/duplex on SVCS routers
>>
>>     cmd = interface {
>>         permit "Ethernet"
>>         deny .*
>>     }
>>
>>     cmd = speed {
>>         permit .*
>>     }
>>     cmd = duplex {
>>         permit .*
>>     }
>>     cmd = default {
>>         permit speed
>>         permit duplex
>>         deny .*
>>     }
>>     cmd = write {
>>         deny ^erase
>>         permit .*
>>     }
>> }
>> user = lukesd {
>>         pap = des 11uGIcdXQ6v9E
>>         login = file /etc/tacacs-passwd
>>         member = readonly
>> }
>> user = curryc {
>>     pap = PAM
>>         login = PAM
>>         member = implementation
>> }
>> user = rhodesw {
>>         pap = PAM
>>         login = PAM
>>         member = implementation
>> }
>> user = aa68442 {
>>         pap = PAM
>>         login = PAM
>>         member = implementation
>> }
>> user = jdimayu {
>>         pap = PAM
>>         login = PAM
>>     member = readonly
>> }
>>
>>
>> Here is the output, and it only displays the first block
>>
>> ['user',
>>  '=',
>>  'aa60591',
>>  ['pap',
>>   '=',
>>   'PAM',
>>   'login',
>>   '=',
>>   'PAM',
>>   'member',
>>   '=',
>>   'readonly',
>>   'cmd',
>>   '=',
>>   'interface',
>>   ['permit', '"Ethernet"', 'deny', '.*'],
>>   'cmd',
>>   '=',
>>   'speed',
>>   ['permit', '.*'],
>>   'cmd',
>>   '=',
>>   'duplex',
>>   ['permit', '.*'],
>>   'cmd',
>>   '=',
>>   'default',
>>   ['permit', 'speed', 'permit', 'duplex', 'deny', '.*'],
>>   'cmd',
>>   '=',
>>   'write',
>>   ['deny', '^erase', 'permit', '.*']]]
>>
>>
>>  --
>> Asif Iqbal
>> PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu
>> A: Because it messes up the order in which people normally read text.
>> Q: Why is top-posting such a bad thing?
>>
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>
>
> --
> Asif Iqbal
> PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu
> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
>
>


-- 
Asif Iqbal
PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?