DNS for SunOS 4.1.X systems

This documents provides directions necessary to enable DNS on SunOS 4.1.X systems. It was originally provided by Sun.

>SRDB ID: 3886
>
>SYNOPSIS: Using DNS without NIS
>
>DETAIL DESCRIPTION:
>
>Want to use DNS, but not NIS
>
>SOLUTION SUMMARY:
>
>MAKING A LIBC.SO for DNS without NIS
>
>		     This is a procedure that can be used to add name resolver
>		     routines into shared libc library in SunOS_4.1.
>
>		     First load "SHLIB CUSTOM" either from SunInstall or from
>		     add_services.
>
>		     Besure to have the file /etc/resolv.conf configured 
>		     properly. Test this with /usr/etc/nslookup.
>
>1. Become super user:
>
>	% su  (if necessary)
>
>2. Make a temporary directory:
>
>	% cd /usr/lib/shlib.etc
>	% mkdir tmp
>
>3. Change to the "tmp" directory just made, extract the pic .o from 
>   libc_pic.a and rm the file __.SYMDEF. The reason you need to do 
>   the 2 "mv" commands is because "ar" truncated filenames over 
>   16 characters.
>
>	% cd tmp
>	% ar x ../libc_pic.a
>	% rm __.SYMDEF
>	% mv rpc_dtablesize. rpc_dtablesize.o
>	% mv rpc_commondata. rpc_commondata.o
>	% ar x /usr/lib/libresolv.a
>
>    The libresolv.a (apparently) contains object modules position independant,
>    so they can be added to the libc_pic modules without fear.
>
>4. Remove the old routine to do the hostname/addr resolution:
>
>	% rm gethostent.o
>
>5. Remove the libresolv module that contains `strncasecmp' (which is now
>   in the main C library, so it is redundant):
>
>	% rm strcasecmp.o
>
>6.  % cd ..
>
>7.  Copy lorder-sparc to lorder-sparc.orig.  Edit the file lorder-sparc and
>    remove the reference to `gethostent.o' and add the references to the
>    resolver library routines by applying this patch:
>
>	remove	:	gethostent.o
>
>	   add	:	gethostnamadr.o 
>			sethostent.o 
>			res_query.o 
>			res_mkquery.o 
>			res_send.o 
>			res_debug.o 
>			res_comp.o 
>			res_init.o
>
>
>	% diff -rc2 lorder-sparc.orig lorder-sparc
>	*** lorder-sparc.orig   Thu Feb  8 05:27:46 1990
>	--- lorder-sparc	Mon Apr  9 12:58:59 1990
>	***************
>	*** 150,154 ****
>	  getwd.o
>	  getnetgrent.o
>	! gethostent.o
>	  ypxdr.o
>	  ttyname.o
>	--- 150,161 ----
>	  getwd.o
>	  getnetgrent.o
>	! gethostnamadr.o
>	! sethostent.o
>	! res_query.o
>	! res_mkquery.o
>	! res_send.o
>	! res_debug.o
>	! res_comp.o
>	! res_init.o
>	  ypxdr.o
>	  ttyname.o
>
>
>8. % make libc.so
>
>9. Now some libc.so.x.y.z built in the current directory.  It is recommended
>   that you test out this library at this point before installing it.  Can do
>   so by setting the environment LD_LIBRARY_PATH to the current directory, for
>   example:
>
>   	% setenv LD_LIBRARY_PATH `pwd`
>	% your_favorite_test_cmd  (ie. ping, ftp, telnet)
>
>   Once satisfied that the new library worked, proceed to install it with the
>   following commands:
>
>	% cp libc.so.x.y.z /usr/lib
>	% ldconfig
>	% unsetenv LD_LIBRARY_PATH
>
>10. Now running with the new library.  Verify this by doing a trace command
>    of let's say "date".
>
>	% trace date
>
>   The output should inform you that the new library is being used.
>
>
>
>BUG REPORT ID: n/a
>PATCH ID: n/a
>PRODUCT AREA: n/a
>PRODUCT: DNS
>SUNOS RELEASE: SunOS 4.1
>UNBUNDLED RELEASE: n/a
>HARDWARE: n/a