testcases/network/stress/ssh/ssh-stress02-rmt

#!/bin/sh

################################################################################
##                                                                            ##
## Copyright (c) International Business Machines  Corp., 2005                 ##
##                                                                            ##
## This program is free software;  you can redistribute it and#or modify      ##
## it under the terms of the GNU General Public License as published by       ##
## the Free Software Foundation; either version 2 of the License, or          ##
## (at your option) any later version.                                        ##
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## This program is distributed in the hope that it will be useful, but        ##
## WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY ##
## or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License   ##
## for more details.                                                          ##
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## You should have received a copy of the GNU General Public License          ##
## along with this program;  if not, write to the Free Software               ##
## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA    ##
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################################################################################
#
# File:
#   ssh-stress02-rmt
#
# Description:
#   This is the remote script for ssh-ipv${IP_VER}-stress02
#
# Author:
#   Mitsuru Chinen <mitch@jp.ibm.com>
#
# Arguments:
#   $1: version of IP
#   $2: IP address log into
#   $3: ssh_config file
#   $4: quantity of connection
#   $5: duration
#
# Exit Value:
#    0: Success
#   >0: Fail
#
# History:
#	Oct 19 2005 - Created (Mitsuru Chinen)
#
#-----------------------------------------------------------------------
# Uncomment line below for debug output.
#trace_logic=${trace_logic:-"set -x"}
$trace_logic

# Check the arguments
if [ $# -ne 5 ]; then
    echo "Usage: $0 IP_version server_addr config_dir connect_quantity duration"
    exit 1
fi
ip_ver="$1"
server_ipaddr="$2"
ssh_config="$3"
connect_quontity="$4"
duration="$5"

# Unset the maximum number of processes
ulimit -u unlimited

# Specify the option of ssh accoring to the version of IP
case $ip_ver in
    4)
    ver_opt="-4"
    ;;
    6)
    ver_opt="-6"
    ;;
    *)
    echo "$ver_opt is unknown IP version"
    exit 1
    ;;
esac
    
# Check the connectivity first
if [ ! -f $ssh_config ]; then
    echo "$ssh_config is something wrong."
    exit 1
fi
ssh $ver_opt -F $ssh_config $server_ipaddr "true </dev/null >/dev/null 2>&1" >/dev/null 2>&1
if [ $? -ne 0 ]; then
    echo "Failed to connect $server_ipaddr"
    exit 1
fi

# 
# Mail loop
#
start_epoc=`date +%s`
while true ; do
    # Exit when the specified seconds have passed.
    current_epoc=`date +%s`
    elapse_epoc=`expr $current_epoc - $start_epoc`
    if [ $elapse_epoc -ge $duration ]; then
	break
    fi

    # Do not make ssh connection over the specified quontity
    ssh_num=`jobs | wc -l`
    if [ $ssh_num -ge $connect_quontity ]; then
	sleep 1
	continue;
    fi

    # specified wait time and login time
    wait_sec=`expr $RANDOM \* 3 / 32768`
    login_sec=`expr $RANDOM \* 10 / 32768`

    # Login to the server
    (sleep $wait_sec ; ssh $ver_opt -F $ssh_config -l root $server_ipaddr "sleep $login_sec </dev/null >/dev/null 2>&1") >/dev/null 2>&1  &
done

# wait for the finish of all process
wait

# Check the connectivity again
ssh $ver_opt -F $ssh_config $server_ipaddr "true </dev/null >/dev/null 2>&1" >/dev/null 2>&1
if [ $? -ne 0 ]; then
    echo "Failed to connect $server_ipaddr. ssh connectivity is lost."
    exit 1
fi

exit 0