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BASH Script format, 10 years 9 months old.

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Thursday, April 5th, 2007 at 8:54:45am UTC 

  1. #!/bin/bash
  2.  
  3. # config
  4. _NETWORK="10.0.0.0/24" # your network/mask
  5. _DOMAIN="intra.wudnerlin.net" # your domain
  6. _INTERFACE="eth0" # your local interface
  7.  
  8. ip=""; host=""; mac=""; create=false; quiet=false;
  9.  
  10. function scan_usage {
  11. cat << EOT
  12. usage: scan [-c] [-h] [-q] [search-reg]
  13.  
  14. Options
  15.  -c      create output, usable as create arguments
  16.  -h      help
  17.  -q      quiet, minimal output
  18.  
  19. the optional regular expression is passed to egrep
  20. EOT
  21. exit;
  22. }
  23.  
  24. while getopts hcq o 2>/dev/null; do
  25.         case "$o" in
  26.                 h) scan_usage;;
  27.                 c) create=true;;
  28.                 q) quiet=true;;
  29.         esac
  30.         shift;
  31. done
  32.  
  33. oldifs="$IFS";
  34. IFS="
  35. ";
  36.  
  37. if [[ ! -z $1 && $1 == "help" ]]; then
  38.         scan_usage;
  39. fi
  40.  
  41. if [[ $create == false && $quiet == false ]]; then
  42.         echo -n "scanning $_NETWORK";
  43.         if [[ ! -z $1 && $1 != "help" ]]; then
  44.                 echo -n ", for $1";
  45.         fi
  46.         echo " ... please wait.";
  47. fi
  48.  
  49. for l in `nmap -sP $_NETWORK | grep ^Host | awk '{print $3"|"$2} ' |\
  50.         sed -e 's/[\(\)]//g'`; do
  51.        
  52.         # use search pattern if there is one
  53.         if [[ ! -z $1 ]]; then
  54.                 l=`echo $l | egrep $1`;
  55.                 if [[ -z $l ]]; then
  56.                         continue;
  57.                 fi
  58.         fi
  59.  
  60.         ip=`echo "$l" | cut -d'|' -f1`;
  61.         host=`echo "$l" | cut -d'|' -f2`; # | sed -e 's/'"asdfasdfasdf"'//';
  62.         host=`echo "$host" | sed -e 's/\.'$_DOMAIN'//'`;
  63.        
  64.         if [[ "`hostname`" != "$host" ]]; then
  65.                 mac=`arp $ip |grep ether| sed -e 's/.*\([0-9A-F:]\{17\}\).*/\1/'`;
  66.         else
  67.                 mac=`ifconfig | grep $_INTERFACE | sed -e 's/.*\([0-9A-F:]\{17\}\).*/\1/'`;
  68.         fi
  69.        
  70.         if [[ $create == false ]]; then
  71.                 echo -e "$ip\t$mac\t$host";
  72.         else
  73.                 echo -e "$host $ip $mac";
  74.         fi
  75. done
  76. IFS="$oldifs";
  77.  
  78. exit 0;

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