[NTLUG:Discuss] Scripting help

[Leroy Tennison]

Thanks for the reply, I must admit, I'm learning a lot (the hard way) 
from this "exercise".  Went and read 'man xargs' because of your post 
and noticed:

"       -a file
               Read items from file instead of standard input.  If you 
use this option, stdin remains  unchanged  when  commands
               are run.  Otherwise, stdin is redirected from /dev/null.
"
This explains what you are saying perfectly.  It looks like my only 
option for using this approach is to create a file in /tmp (further 
investigation since my original post discovered this, wonder how the 
administrator will feel about that or if they would even notice).

On 10/13/2014 01:57 PM, Eric Schnoebelen wrote:
> Leroy Tennison writes:
> - 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)
>
> That's likely because telnet  does not have standard input when
> executed via xargs.  So, telnet gets connected, then tries to
> read from standard input, gets an EOF, and starts shutting down.
>
> - 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
>
> --
> Eric Schnoebelen		eric at cirr.com 		http://www.cirr.com
>        "Memory is like an orgasm. It's a lot better if you don't
> 	  have to fake it." -Seymore Cray, on virtual memory
>
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