NetBSD/usr.sbin/named/host/nslookup

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#!/bin/sh -
#
# @(#)nslookup e07@nikhef.nl (Eric Wassenaar) 940919
#
# Author: E.Wassenaar, Nikhef-H
# Version: 19-SEP-1994
# Revision:
#
# This utility emulates nslookup as a wrapper to host.
# It performs most, but not all, functions.
exec=echo
exec=
# ----------------------------------------------------------------------
# Setup environment.
# ----------------------------------------------------------------------
# This is where the ``host'' executable lives.
BINDIR=/usr/local/bin
PATH=${BINDIR}:/bin:/usr/bin:/usr/ucb ; export PATH
cmd=`basename $0`
options="[-l]"
usage="Usage: $cmd $options [server]"
# ----------------------------------------------------------------------
# Exit codes from <sysexits.h>
# ----------------------------------------------------------------------
EX_OK=0
EX_USAGE=64
EX_UNAVAILABLE=69
# ----------------------------------------------------------------------
# Setup defaults.
# ----------------------------------------------------------------------
name=""
zone=""
type=""
class=""
server=""
debug=""
verbose=""
norecurse=""
vc=""
# ----------------------------------------------------------------------
# Process arguments.
# ----------------------------------------------------------------------
for i
do
if [ "X$server" != "X" ]
then
echo "$usage" 1>&2 ; exit $EX_USAGE
fi
case "$i" in
-d) exec=echo ;;
-l) server=`hostname` ;;
-*) echo "$cmd: Unknown option $i" 1>&2 ; exit $EX_USAGE ;;
*) server="$i" ;;
esac
done
# ----------------------------------------------------------------------
# Choose between BSD or SYSV echo command.
# ----------------------------------------------------------------------
n=`echo -n`
if [ "$n" = "-n" ]
then
c='\c' ; n=''
else
n='-n' ; c=''
fi
# ----------------------------------------------------------------------
# Main loop.
# ----------------------------------------------------------------------
trap continue 2
while echo $n "> $c" ; read line
do
case "$line" in
"") continue ;;
*\**) continue ;;
*\!*) continue ;;
*\?*) line="help" ;;
esac
set - $line
command="$1"
case "$command" in
help)
cat <<!
exit | quit - exit from the program
help | ? - print this help message
set | set all - show all current settings
set [no]debug - increase debug output level
set [no]verbose - increase verbose output level
set [no]recurse - request recursive nameserver queries
set [no]vc - use virtual circuit for queries
set type=TYPE - query about the given resource record TYPE
set class=CLASS - query about the given resource record CLASS
server SERVER - contact the explicit server with name SERVER
server - show the name of the current explicit SERVER
NAME - query for NAME using all current settings
NAME SERVER - query for NAME at the given SERVER
ls ZONE - generate listing of the given name ZONE
ls - generate listing of the last given ZONE
ls ZONE [>]FILE - copy resource record output also to FILE
!
;;
exit|quit)
break
;;
set)
option="$2"
case "$option" in
""|all)
echo "name=$name"
echo "zone=$zone"
echo "server=$server"
echo "set type=$type"
echo "set class=$class"
echo "set debug=$debug"
echo "set verbose=$verbose"
echo "set norecurse=$norecurse"
echo "set vc=$vc"
;;
debug|debu|deb|de|d)
debug="-d $debug"
;;
nodebug|nodebu|nodeb|node|nod)
debug=""
;;
d2)
debug="-d -d"
verbose="-v -v"
;;
nod2)
debug=""
verbose=""
;;
verbose|verbos|verbo|verb|ver|ve|v)
verbose="-v $verbose"
;;
noverbose|noverbos|noverbo|noverb|nover|nove|nov)
verbose=""
;;
recurse|recurs|recur|recu|rec|re|r)
norecurse=""
;;
norecurse|norecurs|norecur|norecu|norec|nore|nor)
norecurse="-r"
;;
vc)
vc="-u"
;;
novc)
vc=""
;;
querytype=*|querytyp=*|queryty=*|queryt=*|\
query=*|quer=*|que=*|qu=*|q=*|\
type=*|typ=*|ty=*|t=*)
type=`echo $option | sed 's/.*=//'`
if [ "X$type" != "X" ]
then
type="-t $type"
fi
;;
querytype|querytyp|queryty|queryt|\
query|quer|que|qu|q|\
type|typ|ty|t)
type=""
;;
class=*|clas=*|cla=*|cl=*|c=*)
class=`echo $option | sed 's/.*=//'`
if [ "X$class" != "X" ]
then
class="-c $class"
fi
;;
class*|clas*|cla*|cl*|c*)
class=""
;;
*)
echo "Unknown option $option"
;;
esac
;;
server)
nserver="$2"
if [ "X$nserver" = "X" ]
then
if [ "X$server" = "X" ]
then
echo "No server defined"
else
echo "server=$server"
fi
else
server="$nserver"
fi
;;
ls)
nzone="$2"
if [ "X$nzone" = "X" ]
then
if [ "X$zone" = "X" ]
then
echo "No zone defined"
continue
fi
else
zone="$nzone"
fi
file=`echo "$3$4" | sed 's/>*//'`
if [ "X$file" != "X" ]
then
file="-f $file"
fi
options="$debug $verbose $norecurse $vc $file"
$exec host $options $type $class -l $zone $nserver
;;
[a-zA-Z0-9]*)
name="$1"
nserver="$2"
if [ "X$nserver" = "X" ]
then
nserver="$server"
fi
options="$debug $verbose $norecurse $vc"
$exec host $options $type $class $name $nserver
;;
*)
echo "Unknown command $command"
;;
esac
done
exit $EX_OK