Given a file path that has a hostname per line, uses another script to get the IP for each host then tries an ICMP ping and returns those that reply

filetopingreply.sh

#!/bin/sh

# *********************************************************************
# script: filetopingreply
# summary: given a file path (assuming it has a host per line), uses 
#	   another script to get the IP for each host then tries 
#          an ICMP ping and returns those that reply
#	   NOTE: Backgrounds each PING to perform these faster!
# dependencies: filetoiplist (in same path as this script); grep
# by: e.a.soto, [email protected]
# 
# history
# =======
# 
# 2015-09-16: created.
# 
# *********************************************************************

# path to where this script stored (we assume dependent scripts are here too)
BASEDIR=$(dirname $0)

# check for required parameter
if [ $# -eq 0 ]
  then
    echo "File Path must be supplied!"
    exit 1
fi

# basic logic
# 
# use for to loop through each line in the output of filetoiplist
#  does "ping" command on each 
# pipes to grep looking for reply "bytes from"
# pipes to cut to get rid of extraneous characters

for ip in $($BASEDIR/filetoiplist.sh "$1")
  do ping -c1 $ip |
    grep "bytes from" |
    cut -d" " -f4 |
    cut -d":" -f1 &
done