ping_scan_linux

#! /bin/sh

# ping_scan_linux - Send an ICMP echo request to each of the IPs given.
# Copyright (C) 2018 Erik Auerswald <auerswal@unix-ag.uni-kl.de>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved.  This file is offered as-is,
# without any warranty.

# This is a simple implementation of a ping scan for use on GNU/Linux.
# It requires ping from iputils (or a ping with compatible output format
# and options).
#
# A full featured ping scan implementation can be found at my home page:
# https://www.unix-ag.uni-kl.de/~auerswal/ping_scan/
# or as part of my Single File Tools (SFT) collection:
# https://github.com/auerswal/sft

{ \
for i in "$@"; do \
  ping -c1 -q -W3 "$i" 2>/dev/null& \
done; \
wait; \
} \
| sed -n '/^---/{N;s/^--- \([^ ]*\) .*\n1 [^1]*1 rec.*$/\1 is alive/p}' \
| sort -t. -k1,1n -k2,2n -k3,3n -k4,4n -u
wait