common.sh

common.sh

function is_ip() {
    local ip=$1
    local stat=1

    if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
        OIFS=$IFS
        IFS='.'
        ip=($ip)
        IFS=$OIFS
        [[ ${ip[0]} -le 255 && ${ip[1]} -le 255 \
            && ${ip[2]} -le 255 && ${ip[3]} -le 255 ]]
        stat=$?
    fi
    return $stat
}

# usage: is_ipv4_ip <ip>
is_ipv4_ip() {
    # test variable is an ip address or not
    # true: return 0
    # false: return 2

    [ "$1" = "" ] && return 2
    if ! echo "$1" | grep -q "^[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}$"; then
        return 2
    fi
    part1=$(echo $1|cut -d"." -f1)
    part2=$(echo $1|cut -d"." -f2)
    part3=$(echo $1|cut -d"." -f3)
    part4=$(echo $1|cut -d"." -f4)
    if [ $part1 -ge 0 -a $part1 -le 255 ] && \
       [ $part2 -ge 0 -a $part2 -le 255 ] && \
       [ $part3 -ge 0 -a $part3 -le 255 ] && \
       [ $part4 -ge 0 -a $part4 -le 255 ]; then
        return 0
    else
        return 2
    fi
}

# usage: is_priv_ipv4_ip <ip>
is_priv_ipv4_ip() {
    # test variable is an private ip address or not
    # true: return 0
    # false: return 1
    # bad ip: retrun 2
    is_ipv4_ip $1 || return $?
    convip() {
        re=$(echo $1 | awk -F. '{printf "%d",$1*256^3+$2*256^2+$3*256+$4}')
        echo "$re"
    }
    ip=$(convip $1)
    # 10.0.0.0    --   10.255.255.255   (167772160 -- 184549375)
    # 127.0.0.0   --   127.255.255.255  (2130706432 -- 2147483647)
    # 172.16.0.0  --   172.31.255.255   (2886729728 -- 2887778303)
    # 192.168.0.0  --  192.168.255.255  (3232235520 -- 3232301055)
    if [ $ip -ge 167772160 -a $ip -le 184549375 -o \
        $ip -ge 2130706432 -a $ip -le 2147483647 -o \
        $ip -ge 2886729728 -a $ip -le 2887778303 -o \
        $ip -ge 3232235520 -a $ip -le 3232301055 ]; then
        return 0
    else
        return 1
    fi
}

# escape spical chars
# usage: ere_quote string
ere_quote() {
    echo "$*" | sed 's/[]\.|$(){}?+*^]/\\&/g'
}

is_abs_path() {
    local path="$1"
    if [[ "$path" =~ ^/[-_./a-zA-Z0-9]+$ ]]; then
        if echo "$path" |grep -q -e "/\.\{1,\}/\{1\}" -e "/\{2,\}"; then
            return 1
        fi
        return 0
    fi
    return 1
}

is_url() {
    local url="$1"
    if [ "${#url}" -gt 100 ]; then
        return 1
    fi
    echo "$url" |grep -qi "^https\{0,1\}://\([0-9a-zA-Z-]\{1,\}\.\)\{1,\}[a-zA-Z]\{1,\}\(/.*\)\{0,\}$"
    if [ "$?" -eq 0 ]; then
        return 0
    else
        return 1
    fi
}