You aren't seeing the output from the 1st telnet session because the script is reading it instead of displaying it on the terminal. I was mistakenly expecting to see only PWR0 or PWR1 on the 1st (and only) line of output from telnet. Let's try a slight modification:
Code:
#!/bin/ksh
echo '*** Request amp status...'
{ sleep 2
echo '?p'
sleep 2
} | telnet 192.168.1.155 | while read power
do printf "%s\n" "$power"
if [ "$power" = "PWR1" ]
then echo '*** Amp power is on; send mute command...'
{ sleep 2
echo MZ
sleep 2
} | telnet 192.168.1.155
echo '*** Amp should be muted now.'
fi
done
This should let us see the output from both telnet sessions (assuming we do get a line from the 1st session that just contains "PWR1").
(I normally use ksh, but this script should also work with bash.)
Sorry I couldn't react earlier! I really like that you are helping me, but I've been busy last night so I couldnt try it any sooner(wife nagging ) .
I've tried you script and adjusted some tiny bits. Strange thing is that the pioneer amp gives a answer on the ?p question with PWR0, instead of 1... which you would expect. Anyway, I've tried your script it gave me this:
Code:
pi@domoticzpi ~ $ . /home/pi/domoticz/scripts/bash/versterkeruit1.sh
*** Request amp status...
Trying 192.168.1.155...
Connected to 192.168.1.155.
Escape character is '^]'.
BridgeCo AG Telnet server
PWR0
Connection closed by foreign host.
So there is something happing! but I it wont go any further. When I look at the telnet session closely it does not only give me the PWR0 answer sometimes, but sometimes a line with numbers. I guess this happens when something changes inside the amp. some sort of feedback. Then again, the script does not go any further so maybe this is not the problem.
I found a site which describes some kind of scripts which stores the output. I don't know if we can use this?
(im not allowed to post URL yet... so put the www infront
perceptiveautomation.com/userforum/viewtopic.php?f=11&t=6909&sid=0e816ef6a8c75d478492a4576b5c200d&start=15
Hi,
How to write a script to perform telnet/ftp operation.
Also please refer some site to get reference about shell scripting.
Thanks in advance
-Arun. (1 Reply)
I am trying to use telnet in shell script but getting following error
error
Connected to crmapp00.agf.ca.
Escape character is '^]'.
Connection closed by foreign host.
Script
#!/bin/ksh
PATH=/usr/sbin/:/usr/bin:/usr/ucb:/etc:/usr/local/bin:.
telnet HOSTNAME <<SCRIPT
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I was trying to use telnet in a script to access a certain processor on a certain port to view some processes. The problem is that when I use telnet the output is displayed for me.
The script is:
#!/bin/sh
cd /ahmed/ezzat/
rm ss7trace.log
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How do I write the script for the following
telnet 192.168.1.100 9002
if the result is less than 1 second. The script should say as port open
if the result takes more than 3 seconds. The script should display as port closed.
Thanks,
Charan (1 Reply)
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I would like to write a ad hoc shell script that would allow me to do some telnet tests to multiple IP's and ports at the same time . So, I want to determine which one is successful and which one fails. So, basically I would like the shell to spawn the telnet test and to break out of... (3 Replies)
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Hello,
I wrote a script for doing telnet.However the requirement got changed and now I have to write a telnet script that will
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Hello,
I wrote a script for doing telnet.However the requirement got changed and now I have to write a telnet script that will
1. Do the telnet from all the virtual ips in a box(Ex: x.x.x.x is the box ip, and x.x.x.1,x.x.x.2 etc are virtual ips associated with that box.)
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Discussion started by: coolkid
3 Replies
LEARN ABOUT DEBIAN
rxtelnet
RXTELNET(1) BSD General Commands Manual RXTELNET(1)NAME
rxtelnet -- start a telnet and forward X-connections.
SYNOPSIS
rxtelnet [-l username] [-k] [-t telnet_args] [-x xterm_args] [-K kx_args] [-w term_emulator] [-b telnet_program] [-n] [-v] host [port]
DESCRIPTION
The rxtelnet program starts an xterm window with a telnet to host host. From this window you will also be able to run X clients that will be
able to connect securely to your X server. If port is given, that port will be used instead of the default.
If setting up the X forwarding failes, rxtelnet will still telnet in to the remote host, but without X forwarding.
The supported options are:
-l Log in on the remote host as user username.
-k Disables keep-alives.
-t Send telnet_args as arguments to telnet.
-x Send xterm_args as arguments to xterm.
-X Send kx_args as arguments to kx.
-w Use term_emulator instead of xterm.
-b Use telnet_program instead of telnet.
-n Do not start any terminal emulator.
-v Be verbose.
EXAMPLE
To login from host foo (where your display is) to host bar, you might do the following.
1. On foo: rxtelnet bar
2. You will get a new window with a telnet to bar. In this window you will be able to start X clients.
SEE ALSO kx(1), rxterm(1), telnet(1), tenletxr(1), kxd(8)KTH_KRB March 7, 2004 KTH_KRB
05-13-2014
) .