From leroy.tennison at verizon.net  Tue Oct  7 00:00:10 2014
From: leroy.tennison at verizon.net (Leroy Tennison)
Date: Tue, 07 Oct 2014 00:00:10 -0500
Subject: [NTLUG:Discuss] Scripting help
In-Reply-To: <54262612.8070204@verizon.net>
References: <201409261503.s8QF35Gm010835@egsner.cirr.com>
	<54262612.8070204@verizon.net>
Message-ID: <5433735A.7040804@verizon.net>

Eric's approach worked, thanks:

hostlist=""
while read host; do hostlist="$hostlist $host"; done
(paste the line-delimited lists of hosts followed by a Ctrl-D here)
for i in $hostlist; do telnet $i; done

On 09/26/2014 09:50 PM, Leroy Tennison wrote:
> Thanks for your reply.  In response to your first question, the script 
> is hosted on the system I'm connecting to via ssh.  More specifically, 
> the local host is Windows, the ssh client is Putty and only the remote 
> system is Linux.  I do not have file system write access on the Linux 
> machine which makes things challenging. I write the script 
> interactively, pasting in my list at the appropriate place.
>
> I "played around" with your final script and may have come up with a 
> solution:
>
> hosts="host1
> host2
> host3";
> for i in $hosts; do echo aaa $i bbb; done                (I'm testing 
> from home where no host list exists so 'echo aaa $i bbb' shows the 
> command)
>
> What I got was:
>
> aaa host1 bbb
> aaa host2 bbb
> aaa host3 bbb
>
> which looks like what I want.  A test Monday will tell...
>
> On 09/26/2014 10:03 AM, Eric Schnoebelen wrote:
>> Leroy Tennison writes:
>> - I'm trying to get telnet to repetitively connect to a 
>> newline-delimited
>> - list of devices.  In other words, if I have device1, device2 and 
>> device3
>> - then what I want is:
>> -
>> - telnet device1
>> - telnet device2
>> - telnet device3
>> -
>> - I've used three devices as an example but my lists are much longer. 
>> For
>> - reasons too complicated to go into, this has to be done via ssh to a
>> - Linux machine where I have no file system access (so the list has 
>> to be
>> - pasted into the script interactively).
>>
>> Is the script hosted locally or on the system you're using SSH
>> to connect too?
>>
>> If the script, and the list of devices are in files locally,
>> something like this could work:
>>
>>      for h in  host1 host2.. ; do
>>     ssh gateway telnet $h
>>      done
>>
>> If the script is remote, but can take an argument set (aka, it
>> looked like this:
>>      for h in "$@"; do
>>     telnet $h
>>      done
>> )
>>
>> it could be called as
>>
>>      ssh gateway <script> $(cat <devices>)
>>
>> - I've tried using grave around the list and setting IFS to a space with
>> - similar results.  I considered using 'read' but have initially decided
>> - against it because I don't want the script constrained to a given 
>> number
>> - of list entries.
>>
>> Why would using read constrain you to a limited number of
>> entries?  Here's a small shell program to keep gobbling the read
>> values, and turn it into a single variable that can be parsed by
>> the for subcommand:
>>
>>      hosts=""
>>      while read host ; do
>>     hosts="$hosts '$host'"
>>      done
>>      for h in $hosts; do
>>     telnet $h
>>      done
>>
>> -- 
>> Eric Schnoebelen        eric at cirr.com        http://www.cirr.com
>>     Five boxes preserve our freedoms:
>>             soap, ballot, witness, jury, and cartridge
>>
>> _______________________________________________
>> http://www.ntlug.org/mailman/listinfo/discuss
>>
>
>
> _______________________________________________
> http://www.ntlug.org/mailman/listinfo/discuss
>



From cjcox at acm.org  Thu Oct  9 21:13:04 2014
From: cjcox at acm.org (Christopher Cox)
Date: Thu, 09 Oct 2014 21:13:04 -0500
Subject: [NTLUG:Discuss] Scripting help
In-Reply-To: <54238AF2.8080506@verizon.net>
References: <54238AF2.8080506@verizon.net>
Message-ID: <543740B0.1040601@acm.org>

On 09/24/2014 10:24 PM, Leroy Tennison wrote:
> I'm trying to get telnet to repetitively connect to a newline-delimited list of
> devices.  In other words, if I have device1, device2 and device3 then what I
> want is:
> 
> telnet device1
> telnet device2
> telnet device3
> 

xargs -n1 telnet <<HERE
device1
device2
device3
...
deviceN
HERE





From leroy.tennison at verizon.net  Fri Oct 10 23:06:59 2014
From: leroy.tennison at verizon.net (Leroy Tennison)
Date: Fri, 10 Oct 2014 23:06:59 -0500
Subject: [NTLUG:Discuss] Scripting help
In-Reply-To: <543740B0.1040601@acm.org>
References: <54238AF2.8080506@verizon.net> <543740B0.1040601@acm.org>
Message-ID: <5438ACE3.6090800@verizon.net>

Well, interesting result, it obviously did telnet to the devices (got 
Trying .., Connected to..., Escape character is ..)  but then 
"Connection closed by foreign host." before ever showing me the login 
screen (three times, once for each device in my list).  BTW, I'm 
discovering that things which work on bash in SuSE 12.2 (bash 4.2.45(1)) 
don't work on RHEL 5 (bash 3.2.25(1)).

On 10/09/2014 09:13 PM, Christopher Cox wrote:
> On 09/24/2014 10:24 PM, Leroy Tennison wrote:
>> I'm trying to get telnet to repetitively connect to a newline-delimited list of
>> devices.  In other words, if I have device1, device2 and device3 then what I
>> want is:
>>
>> telnet device1
>> telnet device2
>> telnet device3
>>
> xargs -n1 telnet <<HERE
> device1
> device2
> device3
> ...
> deviceN
> HERE
>
>
>
>
> _______________________________________________
> http://www.ntlug.org/mailman/listinfo/discuss
>