46 lines
1.1 KiB
Modula-2
46 lines
1.1 KiB
Modula-2
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#!/bin/bash
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# usage:
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# [[ $(host_reachable host.net) ]] && echo sure || echo nope
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# or
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# host_reachable &> /dev/null && echo sure || echo nope
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# or
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host_reachable () {
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if [[ $(command -v nmap) ]] && [[ $2 ]]; then
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[[ $(nmap $1 -PN -p $2 | grep open) ]] && echo yes && return 0 || return 1
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fi
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if [[ $(command -v nc) ]] && [[ $2 ]]; then
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[[ $(nc -w 2 $1 $2) ]] && echo yes && return 0 || return 1
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fi
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if [[ $(command -v ping) ]]; then
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ping -c1 -W1 $1 &> /dev/null && echo yes && return 0 || return 1
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fi
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return 2 # return 2 to indicate no method was available
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}
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valid_ip()
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{
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local ip=$1
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local stat=1
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local res
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if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
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OIFS=$IFS
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IFS='.'
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ip=($ip)
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IFS=$OIFS
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[[ ${ip[0]} -le 255 && ${ip[1]} -le 255 \
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&& ${ip[2]} -le 255 && ${ip[3]} -le 255 ]]
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res=$([ $? == 0 ] && echo true || echo false)
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else
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res=false
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fi
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echo $res
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}
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get_domain() {
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local domain
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domain=$(echo $1 | awk -F\. '{print $(NF-1) FS $NF}')
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echo "$domain"
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}
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