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Full Discussion: broken pipe error
Top Forums UNIX for Dummies Questions & Answers broken pipe error Post 302606793 by aimeet on Monday 12th of March 2012 08:03:19 PM
Old 03-12-2012
telnet using a script - broken pipe error

I'm new to scripting, and this forum has been invaluable in helping me out. I'm hoping I can get some personal help now though.

I have a korn script that takes a list of servers and either telnets or sshs into it (only some are set up for ssh). What I'm doing now is trying to telnet first, and if it doesn't work then I ssh. The problem is I get a broken pipe error if ssh is needed. The script still works fine, but people will be freaking out over the broken pipe. Is there a way to prevent the broken pipe error from showing, or a different way to check if the server should be telnet or ssh?

My current code:

Code:
(sleep 1
print <username>
sleep 1
print <password>
sleep 1
print "<some command I need output from>"
sleep 1
print "logout"
) | telnet server1 > $temp_file 2>/dev/null
 
if [ $? -ne 0 ]; then
    <code to ssh into server>
fi

I tried to build a file and do telnet < login_file but I couldn't get that work. I probably did that wrong though. Does anyone know how I'd build the file to redirect to the telnet command?

TIA!

Last edited by aimeet; 03-12-2012 at 09:19 PM.. Reason: please use code tags
 

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telnetrc(4)						     Kernel Interfaces Manual						       telnetrc(4)

NAME
telnetrc, .telnetrc - Specifies setup commands for a telnet session SYNOPSIS
$HOME/.telnetrc DESCRIPTION
The .telnetrc file contains the setup information for a telnet session. It is a hidden file in your home directory and must be readable by the user logging in. The file can consist of multiple entries for each remote host to which a user can connect. A remote host entry consists of multiple lines. The first line is the name of a remote host. The subsequent lines must begin with blank spaces, and contain telnet subcommands. These sub- commands are processed as though they were typed in manually. Lines beginning with a number sign (#) are comment lines. See telnet(1) for a complete list of telnet subcommands. To specify subcommands that apply to all systems, create an entry, using the word "DEFAULT" as the system name, and specify the telnet sub- commands in the subsequent lines. EXAMPLES
The following shows a sample .telnetrc file: # Beginning of telnetrc file # Default subcommands that apply to all systems DEFAULT environ undefine USER # First system entry system1 set echo toggle crlf # Second system entry system2 set echo mode line toggle crlf FILES
User-customized telnet startup values. RELATED INFORMATION
Commands: telnet(1). delim off telnetrc(4)
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