From: Meena Valliappan <lists@...>
Date: 2012-03-22T16:12:35+09:00
Subject: SSH hangs for a particular command in SSH.exec!(cmd)

Hi All,

   I am trying to connect the remote ssh server via ruby using
Net::SSH.It is working fine for me for all the commands provided via
script and i could able to read the output of the command successfully.
But when i use the below command it is getting stuck in SSH.exec!(cmd)
and control is not returned from the line. Only if i click Ctrl+c in
command line the script is getting ended.
The command is ./wcsadmin.sh start --> this is used to start the
processes of my application in remote server

Please find the below code snippet of my ruby script:

    Net::SSH.start(host, username, :password => password) do |ssh|
    puts 'before exit'
    output = ssh.exec!(/opt/wcsadmin.sh start)
    puts 'Executed command'

The output of the command when i do it manually is :

[root@test bin]# ./wcsadmin.sh start

Starting Network Control System...

This may take a few minutes...
stty: standard input: Invalid argument

Network Control System started successfully.

Starting SAM daemon...
Done.
Starting DA daemon...
Starting DA syslog daemon...
start

if i use ssh.exec('./wcsadmin.sh start') the only difference is the
above output is getting printed but still the program is never ended.I
need to manually end it by hitting ctrl+c.When i searched in google i
could find you can use nohup command('nohup /opt/wcsadmin.sh start
>/tmp/teststartserver.log 2>&1') to skip the hangup signals and tried
the same.This also writes the output to teststartserver.log but getting
hanged.Can anyone please help me out on this issue?

Thanks in Advance!

Thanks,
Meena

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