脚本学习 1

#!/usr/bin/env bash
path=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export path
#=================================================================#
#   system required:  centos, debian, ubuntu                      #
#   description: one click install ***-go server          #
#   author: teddysun <[e-mail]>                             #
#   thanks: @cyfdecyf <https://twitter.com/cyfdecyf>              #
#   intro:  https://teddysun.com/392.html                         #
#==================================================================

clear
echo
echo "#############################################################"
echo "# one click install ***-go server                   #"
echo "# intro: https://teddysun.com/392.html                      #"
echo "# author: teddysun <[e-mail]>                         #"
echo "# github: https://github.com/*/*-go     #"
echo "#############################################################"
echo

# current folder
cur_dir=`pwd`
# stream ciphers
ciphers=(
aes-256-cfb
aes-192-cfb
aes-128-cfb
aes-256-ctr
aes-192-ctr
aes-128-ctr
chacha20-ietf
chacha20
salsa20
rc4-md5
)
# color
red='\033[0;31m'
green='\033[0;32m'
yellow='\033[0;33m'
plain='\033[0m'

# make sure only root can run our script
[[ $euid -ne 0 ]] && echo -e "[${red}error${plain}] this script must be run as root!" && exit 1

#check system
check_sys(){
    local checktype=$1
    local value=$2

    local release=''
    local systempackage=''

    if [[ -f /etc/redhat-release ]]; then
        release="centos"
        systempackage="yum"
    elif grep -eqi "debian" /etc/issue; then
        release="debian"
        systempackage="apt"
    elif grep -eqi "ubuntu" /etc/issue; then
        release="ubuntu"
        systempackage="apt"
    elif grep -eqi "centos|red hat|redhat" /etc/issue; then
        release="centos"
        systempackage="yum"
    elif grep -eqi "debian|raspbian" /proc/version; then
        release="debian"
        systempackage="apt"
    elif grep -eqi "ubuntu" /proc/version; then
        release="ubuntu"
        systempackage="apt"
    elif grep -eqi "centos|red hat|redhat" /proc/version; then
        release="centos"
        systempackage="yum"
    fi

    if [[ "${checktype}" == "sysrelease" ]]; then
        if [ "${value}" == "${release}" ]; then
            return 0
        else
            return 1
        fi
    elif [[ "${checktype}" == "packagemanager" ]]; then
        if [ "${value}" == "${systempackage}" ]; then
            return 0
        else
            return 1
        fi
    fi
}

# get version
getversion(){
    if [[ -s /etc/redhat-release ]]; then
        grep -oe  "[0-9.]+" /etc/redhat-release
    else
        grep -oe  "[0-9.]+" /etc/issue
    fi
}

# centos version
centosversion(){
    if check_sys sysrelease centos; then
        local code=$1
        local version="$(getversion)"
        local main_ver=${version%%.*}
        if [ "$main_ver" == "$code" ]; then
            return 0
        else
            return 1
        fi
    else
        return 1
    fi
}

# is 64bit or not
is_64bit(){
    if [ `getconf word_bit` = '32' ] && [ `getconf long_bit` = '64' ] ; then
        return 0
    else
        return 1
    fi
}

# disable selinux
disable_selinux(){
    if [ -s /etc/selinux/config ] && grep 'selinux=enforcing' /etc/selinux/config; then
        sed -i 's/selinux=enforcing/selinux=disabled/g' /etc/selinux/config
        setenforce 0
    fi
}

get_ip(){
    local ip=$( ip addr | egrep -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}' | egrep -v "^192\.168|^172\.1[6-9]\.|^172\.2[0-9]\.|^172\.3[0-2]\.|^10\.|^127\.|^255\.|^0\." | head -n 1 )
    [ -z ${ip} ] && ip=$( wget -qo- -t1 -t2 ipv4.icanhazip.com )
    [ -z ${ip} ] && ip=$( wget -qo- -t1 -t2 ipinfo.io/ip )
    [ ! -z ${ip} ] && echo ${ip} || echo
}

get_char(){
    savedstty=`stty -g`
    stty -echo
    stty cbreak
    dd if=/dev/tty bs=1 count=1 2> /dev/null
    stty -raw
    stty echo
    stty $savedstty
}

# pre-installation settings
pre_install(){
    if ! check_sys packagemanager yum && ! check_sys packagemanager apt; then
        echo -e "$[{red}error${plain}] your os is not supported. please change os to centos/debian/ubuntu and try again."
        exit 1
    fi
    # set *-go config password
    echo "please enter password for *-go:"
    read -p "(default password: teddysun.com):" *pwd
    [ -z "${*pwd}" ] && *pwd="teddysun.com"
    echo
    echo "---------------------------"
    echo "password = ${*pwd}"
    echo "---------------------------"
    echo
    # set *-go config port
    while true
    do
    dport=$(shuf -i 9000-19999 -n 1)
    echo -e "please enter a port for *-go [1-65535]"
    read -p "(default port: ${dport}):" *port
    [ -z "${*port}" ] && *port=${dport}
    expr ${*port} + 1 &>/dev/null
    if [ $? -eq 0 ]; then
        if [ ${*port} -ge 1 ] && [ ${*port} -le 65535 ] && [ ${*port:0:1} != 0 ]; then
            echo
            echo "---------------------------"
            echo "port = ${*port}"
            echo "---------------------------"
            echo
            break
        fi
    fi
    echo -e "[${red}error${plain}] please enter a correct number [1-65535]"
    done

    # set * config stream ciphers
    while true
    do
    echo -e "please select stream cipher for *-go:"
    for ((i=1;i<=${#ciphers[@]};i++ )); do
        hint="${ciphers[$i-1]}"
        echo -e "${green}${i}${plain}) ${hint}"
    done
    read -p "which cipher you'd select(default: ${ciphers[0]}):" pick
    [ -z "$pick" ] && pick=1
    expr ${pick} + 1 &>/dev/null
    if [ $? -ne 0 ]; then
        echo -e "[${red}error${plain}] please enter a number"
        continue
    fi
    if [[ "$pick" -lt 1 || "$pick" -gt ${#ciphers[@]} ]]; then
        echo -e "[${red}error${plain}] please enter a number between 1 and ${#ciphers[@]}"
        continue
    fi
    *cipher=${ciphers[$pick-1]}
    echo
    echo "---------------------------"
    echo "cipher = ${*cipher}"
    echo "---------------------------"
    echo
    break
    done

    echo
    echo "press any key to start...or press ctrl+c to cancel"
    char=`get_char`
    #install necessary dependencies
    if check_sys packagemanager yum; then
        yum install -y wget unzip gzip curl nss
    elif check_sys packagemanager apt; then
        apt-get -y update
        apt-get install -y wget unzip gzip curl libnss3
    fi
    echo

}

# download *-go
download_files(){
    cd ${cur_dir}
    if is_64bit; then
        if ! wget --no-check-certificate -c https://dl.lamp.sh/*/*-server-linux64-1.2.2.gz; then
            echo -e "[${red}error${plain}] failed to download *-server-linux64-1.2.2.gz"
            exit 1
        fi
        gzip -d *-server-linux64-1.2.2.gz
        if [ $? -ne 0 ]; then
            echo -e "[${red}error${plain}] decompress *-server-linux64-1.2.2.gz failed"
            exit 1
        fi
        mv -f *-server-linux64-1.2.2 /usr/bin/*-server
    else
        if ! wget --no-check-certificate -c https://dl.lamp.sh/*/*-server-linux32-1.2.2.gz; then
            echo -e "[${red}error${plain}] failed to download *-server-linux32-1.2.2.gz"
            exit 1
        fi
        gzip -d *-server-linux32-1.2.2.gz
        if [ $? -ne 0 ]; then
            echo -e "[${red}error${plain}] decompress *-server-linux32-1.2.2.gz failed"
            exit 1
        fi
        mv -f *-server-linux32-1.2.2 /usr/bin/*-server
    fi

    # download start script
    if check_sys packagemanager yum; then
        if ! wget --no-check-certificate -o /etc/init.d/* https://raw.githubusercontent.com/teddysun/*_install/master/*-go; then
            echo -e "[${red}error${plain}] failed to download *-go auto start script!"
            exit 1
        fi
    elif check_sys packagemanager apt; then
        if ! wget --no-check-certificate -o /etc/init.d/* https://raw.githubusercontent.com/teddysun/*_install/master/*-go-debian; then
            echo -e "[${red}error${plain}] failed to download *-go auto start script!"
            exit 1
        fi
    fi
}

# config *
config_*(){
    if [ ! -d /etc/* ]; then
        mkdir -p /etc/*
    fi
    cat > /etc/*/config.json<<-eof
{
    "server":"0.0.0.0",
    "server_port":${*port},
    "local_port":1080,
    "password":"${*pwd}",
    "method":"${*cipher}",
    "timeout":300
}
eof
}

# firewall set
firewall_set(){
    echo -e "[${green}info${plain}] firewall set start..."
    if centosversion 6; then
        /etc/init.d/iptables status > /dev/null 2>&1
        if [ $? -eq 0 ]; then
            iptables -l -n | grep -i ${*port} > /dev/null 2>&1
            if [ $? -ne 0 ]; then
                iptables -i input -m state --state new -m tcp -p tcp --dport ${*port} -j accept
                iptables -i input -m state --state new -m udp -p udp --dport ${*port} -j accept
                /etc/init.d/iptables save
                /etc/init.d/iptables restart
            else
                echo -e "[${green}info${plain}] port ${*port} has been set up."
            fi
        else
            echo -e "[${yellow}warning${plain}] iptables looks like shutdown or not installed, please manually set it if necessary."
        fi
    elif centosversion 7; then
        systemctl status firewalld > /dev/null 2>&1
        if [ $? -eq 0 ]; then
            default_zone=$(firewall-cmd --get-default-zone)
            firewall-cmd --permanent --zone=${default_zone} --add-port=${*port}/tcp
            firewall-cmd --permanent --zone=${default_zone} --add-port=${*port}/udp
            firewall-cmd --reload
        else
            echo -e "[${yellow}warning${plain}] firewalld looks like not running or not installed, please enable port ${*port} manually if necessary."
        fi
    fi
    echo -e "[${green}info${plain}] firewall set completed..."
}

# install ***-go
install(){

    if [ -f /usr/bin/*-server ]; then
        echo "***-go server install success!"
        chmod +x /usr/bin/*-server
        chmod +x /etc/init.d/*

        if check_sys packagemanager yum; then
            chkconfig --add *
            chkconfig * on
        elif check_sys packagemanager apt; then
            update-rc.d -f * defaults
        fi

        /etc/init.d/* start
        if [ $? -ne 0 ]; then
            echo -e "[${red}error${plain}] ***-go server start failed!"
        fi
    else
        echo
        echo -e "[${red}error${plain}] ***-go server install failed!"
        exit 1
    fi

    clear
    echo
    echo -e "congratulations, ***-go server install completed!"
    echo -e "your server ip        : \033[41;37m $(get_ip) \033[0m"
    echo -e "your server port      : \033[41;37m ${*port} \033[0m"
    echo -e "your password         : \033[41;37m ${*pwd} \033[0m"
    echo -e "your encryption method: \033[41;37m ${*cipher} \033[0m"
    echo
    echo "welcome to visit:https://teddysun.com/392.html"
    echo "enjoy it!"
    echo
}

# uninstall ***-go
uninstall_*_go(){
    printf "are you sure uninstall *-go? (y/n) "
    printf "\n"
    read -p "(default: n):" answer
    [ -z ${answer} ] && answer="n"
    if [ "${answer}" == "y" ] || [ "${answer}" == "y" ]; then
        ps -ef | grep -v grep | grep -i "*-server" > /dev/null 2>&1
        if [ $? -eq 0 ]; then
            /etc/init.d/* stop
        fi
        if check_sys packagemanager yum; then
            chkconfig --del *
        elif check_sys packagemanager apt; then
            update-rc.d -f * remove
        fi
        # delete config file
        rm -rf /etc/*
        # delete *
        rm -f /etc/init.d/*
        rm -f /usr/bin/*-server
        echo "***-go uninstall success!"
    else
        echo
        echo "uninstall cancelled, nothing to do..."
        echo
    fi
}

# install ***-go
install_*_go(){
    disable_selinux
    pre_install
    download_files
    config_*
    if check_sys packagemanager yum; then
        firewall_set
    fi
    install
}

# initialization step
action=$1
[ -z $1 ] && action=install
case "$action" in
    install|uninstall)
        ${action}_*_go
        ;;
    *)
        echo "arguments error! [${action}]"
        echo "usage: `basename $0` [install|uninstall]"
        ;;
esac