无expect登录ssh服务器脚本 - Szopen Xiao

本脚本不需要 expect 可以完成简单认证并登录 ssh 服务器，

脚本原理是利用 ssh 的 SSH_ASKPASS 环境变量来实现密码认证,脚本代码如下:

#!/bin/bash
tf="/tmp/sshconnect"
trap 'rm -rf $tf;wait;exit' INT 
trap 'rm -rf $tf;wait;exit' TERM
nt=`date +%s`
echopass=0
if [ -f $tf ];then
    ftime=`stat -c %X $tf`
    ((vt=$nt-$ftime))
    if [ $vt -gt 1 ];then
        rm -rf $tf 
        store=''
    else
        store=`cat $tf`
    fi  

else
    store=''
fi

if [ -z $store ];then
    if [ $# -eq 0 ];then
        echo 'no server given'
        exit 500 
    else
        h=$1
    fi  
else
    h=$store
    echopass=1
fi

##################################
# 以下增加服务器登录信息
#
if [ $h == 'server_name1' ];then
    host='user1@server_address1'
    pass='password1'
elif [ $h == 'server_name2' ];then
    host='user2@server_address2'
    pass='password2'
else
    echo 'given server name invaild'
    exit 500
fi

#################################
if [ $echopass == 1 ];then
    echo $pass
    rm -rf $tf
    exit
fi
echo "$h" > $tf
setsid env SSH_ASKPASS="$selffile" DISPLAY='none:0' ssh $host 
rm -rf $tf