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Top Forums Shell Programming and Scripting Shell Script to Retry and Exit Post 302472922 by SkySmart on Thursday 18th of November 2010 12:37:17 PM
Old 11-18-2010
Shell Script to Retry and Exit

ok, so I'm trying to add a function to my local script that runs a command on a remote host. The reason why this is needed is that, there are other scripts that run different commands on the same remote host.

so the problem is that many times there are multiple scripts being run on the remote host, which then causes collisions and all the multiple scripts abort with a "Query Timed Out" message. All these scripts connect to port 1040 on the remote host...which is why i guess they time out.

i want to put something in my local script try to run to a command on the remote host three times. during those three times, if it doesn't run into any problems, the script should just break.

if anyone has a better idea than the below please let me know.

thanks

Code:
#!/bin/sh

x=3

while [ $x -le 4 ] ; do

response=`echo "external_cmd backup.sh" | nc -w 3 bogus.godaddy.com 1040`

if [ $? -eq 0 ] ; then

break

elif [ $? -ne 0 ] ; then

response=`echo "external_cmd backup.sh" | nc -w 3 bogus.godaddy.com 1040`

fi

done

this is a nagios script by the way.
 

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RSH(1)							      General Commands Manual							    RSH(1)

NAME
rsh - remote shell SYNOPSIS
rsh [-n] [-l username] host [command] host [-n] [-l username] [command] DESCRIPTION
Rsh connects to the specified host, and executes the specified command. Rsh copies its standard input to the remote command, the standard output of the remote command to its standard output, and the standard error of the remote command to its standard error. Interrupt, quit and terminate signals are propagated to the remote command; rsh normally terminates when the remote command does. The remote username used is the same as your local username, unless you specify a different remote name with the -l option. This remote name must be equivalent (in the sense of rlogin(1)) to the originating account; no provision is made for specifying a password with a com- mand. If you omit command, then instead of executing a single command, you will be logged in on the remote host using rlogin(1). Shell metacharacters which are not quoted are interpreted on local machine, while quoted metacharacters are interpreted on the remote machine. Thus the command rsh otherhost cat remotefile >> localfile appends the remote file remotefile to the localfile localfile, while rsh otherhost cat remotefile ">>" otherremotefile appends remotefile to otherremotefile. OPTIONS
-l username Specify the remote user name. -n Connect standard input of the remote command to /dev/null. Do this if rsh should not inadvertently read from standard input. SEE ALSO
rcp(1), rlogin(1), rhosts(5). BUGS
You cannot run an interactive command (like rogue(6) or vi(1)); use rlogin(1). 4.2 Berkeley Distribution April 29, 1985 RSH(1)
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