asterisk users - Feb 2012 - Quick bash tip for finding free SIP extensions from your sip.conf

Created this function on one of my machines today, thought others might
find it useful:

freesip() {
comm -2 <(seq $2 $3) <(cat $1 | grep ^\\[ | sort | uniq | tr -d \[ | tr -d
\]) | grep ^[[:digit:]]
}

On RedHat/CentOS based systems you can create the following file to have
the function available on login:

/etc/profile.d/freesip.sh
# Free SIP extensions
freesip() {
  comm -2 <(seq $2 $3) <(cat $1 | grep ^\\[ | sort | uniq | tr -d \[ | tr
-d \]) | grep ^[[:digit:]]
}

Then if you have a large sip.conf and want to find a free extension between
200 and 299 you can login and do the following:

<begin fake results>
[host]$ freesip /etc/asterisk/sip.conf 200 299
200
201
233
245
[host]$
<end fake results>


-- 
Kyle Sexton
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On Thu, 2 Feb 2012, Kyle Sexton wrote:
> Created this function on one of my machines today, thought others might
find it useful:
> freesip() {
> comm -2 <(seq $2 $3) <(cat $1 | grep ^\\[ | sort | uniq | tr -d \[ |
tr -d \]) | grep ^[[:digit:]]
> }
Shave 4 processes:

freesip()
 	{
 	comm -2 -3\
 		<(seq $2 $3)\
 		<(grep ^\\[[[:digit:]] $1 | sort -u | tr -d \[])
 	}

-- 
Thanks in advance,
-------------------------------------------------------------------------
Steve Edwards       sedwards at sedwards.com      Voice: +1-760-468-3867 PST
Newline                                              Fax: +1-760-731-3000