#!/bin/bash
# info: list system services
# options: [FORMAT]
#
# The function for obtaining the list of configured system services.


#----------------------------------------------------------#
#                    Variable&Function                     #
#----------------------------------------------------------#

# Argument defenition
format=${1-shell}

# Includes
source $VESTA/func/main.sh
source $VESTA/conf/vesta.conf

export PATH=$PATH:/sbin

get_srv_state() {
    srv=$1
    proc_name=${2-$1}

    # Check service status
    state='running'

    # Searching related pids
    if [ -z $3 ]; then
        pids=$(pidof $proc_name |tr ' ' '|')
    else
        pids=$(pidof -x $proc_name |tr ' ' '|')
    fi
    if [ -z "$pids" ] && [ "$proc_name" != 'nginx' ] ; then
        #fallback to pgrep
        pids=$(pgrep $proc_name |tr '\n' '|')
    fi
    if [ ! -z "$pids" ]; then
        pid=$(echo $pids|cut -f 1 -d \|)
        pids=$(egrep "$pids" $tmp_file)

        # Calculating CPU usage
        cpu=$(echo "$pids" |awk '{ sum += $2} END {print sum}')

        # Calculating memory usage
        mem=$(echo "$pids" |awk '{sum += $3} END {print sum/1024 }')
        mem=$(printf "%.0f\n" $mem)

        # Searching service uptime
        if [ -e "/var/run/$srv.pid" ]; then
            srv_file="/var/run/$srv.pid"
        fi
        if [ -z "$srv_file" ] && [ -e "/var/run/$srv/$srv.pid" ]; then
            srv_file="/var/run/$srv/$srv.pid"
        fi
        if [ -z $srv_file ] && [ -e "/proc/$pid" ]; then
            srv_file="/proc/$pid"
        fi
        if [ ! -z "$srv_file" ]; then
            mtime=$(stat -c "%Y" $srv_file)
            rtime=$((ctime - mtime))
            rtime=$((rtime  / 60))
        else
            rtime=0
        fi
    else
        # Service is stopped
        state='stopped'
        mem=0
        cpu=0
        rtime="0"
    fi
}


#----------------------------------------------------------#
#                       Action                             #
#----------------------------------------------------------#

# Save current proccess list
tmp_file=$(mktemp)
ps -eo pid,pcpu,size > $tmp_file

# Get current time
ctime=$(date +%s)

# Web
service=$WEB_SYSTEM
if [ ! -z "$service" ] && [ "$service" != 'remote' ]; then
    if [ "$service" == 'apache' ]; then
        service='httpd'
    fi
    get_srv_state $service
    str="NAME='$service' SYSTEM='web server' STATE='$state' CPU='$cpu'"
    str="$str MEM='$mem' RTIME='$rtime'"

fi

# Backend
service=$WEB_BACKEND
if [ ! -z "$service" ] && [ "$service" != 'remote' ]; then
    get_srv_state $service
    str="$str\nNAME='$service' SYSTEM='backend server' STATE='$state' CPU='$cpu'"
    str="$str MEM='$mem' RTIME='$rtime'"
fi

# Proxy
service=$PROXY_SYSTEM
if [ ! -z "$service" ] && [ "$service" != 'remote' ]; then
    get_srv_state $service
    str="$str\nNAME='$service' SYSTEM='reverse proxy' STATE='$state' CPU='$cpu'"
    str="$str MEM='$mem' RTIME='$rtime'"
fi


# DNS
service=$DNS_SYSTEM
if [ ! -z "$service" ] && [ "$service" != 'remote' ]; then
    if [ "$service" == 'bind' ] || [ "$service" == 'bind9' ]; then
        proc_name='named'
    fi
    get_srv_state $service $proc_name
    str="$str\nNAME='$service' SYSTEM='dns server' STATE='$state' CPU='$cpu'"
    str="$str MEM='$mem' RTIME='$rtime'"
fi

# MAIL
service=$MAIL_SYSTEM
if [ ! -z "$service" ] && [ "$service" != 'remote' ]; then
    get_srv_state $service
    str="$str\nNAME='$service' SYSTEM='mail server' STATE='$state' CPU='$cpu'"
    str="$str MEM='$mem' RTIME='$rtime'"
fi

# IMAP
service=$IMAP_SYSTEM
if [ ! -z "$service" ] && [ "$service" != 'remote' ]; then
    get_srv_state $service
    str="$str\nNAME='$service' SYSTEM='pop/imap server' STATE='$state'"
    str="$str CPU='$cpu' MEM='$mem' RTIME='$rtime'"
fi

# ANTIVIRUS
service=$ANTIVIRUS_SYSTEM
if [ ! -z "$service" ] && [ "$service" != 'remote' ]; then
    if [ -e "/etc/redhat-release" ]; then
        if [ "$ANTIVIRUS_SYSTEM" = 'clamav' ];then
            service='clamd'
        fi
        get_srv_state $service
    else
        if [ "$ANTIVIRUS_SYSTEM" = 'clamav-daemon' ];then
            clam_proc_name='clamd'
        fi
        get_srv_state $service $clam_proc_name
    fi
    str="$str\nNAME='$service' SYSTEM='email antivirus' STATE='$state'"
    str="$str CPU='$cpu' MEM='$mem' RTIME='$rtime'"
fi

# ANTISPAM
service=$ANTISPAM_SYSTEM
if [ ! -z "$service" ] && [ "$service" != 'remote' ]; then
    get_srv_state $service spamd
    str="$str\nNAME='$service' SYSTEM='email antispam' STATE='$state'"
    str="$str CPU='$cpu' MEM='$mem' RTIME='$rtime'"
fi

# DB
service=$DB_SYSTEM
if [ ! -z "$service" ] && [ "$service" != 'remote' ]; then
    for db in ${DB_SYSTEM//,/ }; do
        db_proc_name=''
        service="$db"
        if [ "$service" = 'mysql' ]; then
            if [ -e "/etc/redhat-release" ]; then
                service='mysqld'
                db_proc_name='mysqld'
                if [ -e "/usr/lib/systemd/system/mariadb.service" ]; then
                    service='mariadb'
                fi
            fi
        fi
        if [ "$service" == 'pgsql' ]; then
            service='postgresql'
            db_proc_name='postmaster'
            if [ ! -e "/etc/redhat-release" ]; then
                db_proc_name='postgres'
            fi
            if [ ! -e '/etc/init.d/postgresql' ]; then
                db_proc_name='postgres'
            fi
        fi
        get_srv_state $service $db_proc_name
        str="$str\nNAME='$service' SYSTEM='database server' STATE='$state'"
        str="$str CPU='$cpu' MEM='$mem' RTIME='$rtime'"
    done
fi

# FTP
service=$FTP_SYSTEM
if [ ! -z "$service" ] && [ "$service" != 'remote' ]; then
    get_srv_state $service
    str="$str\nNAME='$service' SYSTEM='ftp server' STATE='$state' CPU='$cpu'"
    str="$str MEM='$mem' RTIME='$rtime'"
fi

# CRON
service=$CRON_SYSTEM
if [ ! -z "$service" ] && [ "$service" != 'remote' ]; then
    get_srv_state $service
    str="$str\nNAME='$service' SYSTEM='job scheduler' STATE='$state'"
    str="$str CPU='$cpu' MEM='$mem' RTIME='$rtime'"
fi

# FIREWALL
service=$FIREWALL_SYSTEM
if [ ! -z "$service" ] && [ "$service" != 'remote' ]; then
    state="stopped"
    /sbin/iptables -L vesta >/dev/null 2>&1
    if [ "$?" -eq 0 ]; then
        state="running"
    fi
    str="$str\nNAME='$FIREWALL_SYSTEM' SYSTEM='firewall'"
    str="$str STATE='$state' CPU='0' MEM='0' RTIME='0'"
fi

# Fail2ban
service=$FIREWALL_EXTENSION
if [ ! -z "$service" ] && [ "$service" != 'remote' ]; then
    get_srv_state $service fail2ban-server script
    str="$str\nNAME='$service' SYSTEM='brute-force monitor' STATE='$state'"
    str="$str CPU='$cpu' MEM='$mem' RTIME='$rtime'"
fi


# Defining config
echo -e "$str" > $tmp_file
conf=$tmp_file

# Defining fileds to select
fields="\$NAME \$SYSTEM \$STATE \$CPU \$MEM \$RTIME"

# Listing services
case $format in 
    json)   json_list ;;
    plain)  nohead=1; shell_list ;;
    shell)  fields='$NAME $STATE $CPU $MEM $RTIME'
            shell_list | column -t ;;
    *)      check_args '1' '0' 'USER [FORMAT]'
esac

rm -f $tmp_file

#----------------------------------------------------------#
#                       Vesta                              #
#----------------------------------------------------------#

exit