Hello all, I finally got the fix for the DNS problem. Below is a copy of my
original request. I failed to metion in the problem that I wasn't running
NIS. Apparently Sun does not support systems running DNS without NIS. You
need a file libc.so.1.8.1 in /usr/shlib.etc to make DNS resolve names. I
was able to get the fix from Sun, it's included in this message. Thanks to
everyone who responded.
Craig Mcguinness <cmcgines@is.rpslmc.edu>
cxh@arsenic.berkeley.edu
eckhard@ts.go.dlr.de (Eckhard Rueggeberg)
cxh@arsenic.berkeley.edu
Matt_Mauss_-T@hqdev.3mail.3com.com
canuck@rice.edu (Mike Pearlman)
hand@cc.bellcore.com (hand,james c)
> Hello folks, I am having problems setting up name resolution on my system.
> First my system is sparc10 running 4.1.3. My system is a sub domain of
> basg.com. My domain is babss.basg.com. Nslookup works fine, the problem
> is if I try to ftp, telnet or ping just using the name of the system. The
> error that I get is host unknown. The system will not resolve names outside
> the babss.basg.com domain. I am stumped. One of my problems is I'm a rookie
> on the whole concept of DNS. Any information will be greatly appreciated.
Below is the Patch:
SRDB ID : 2170
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.x
First load "SHLIB CUSTOM" either from SunInstall or from
add_services.
Be sure 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:
This step did not work. Proceede with copying libc.so.1.8.1 to usr/lib
and do the ldconfig.
% 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.
SYMPTOMS : Can resolve addresses with nslookup, but can't ping,
telnet, or ftp to system by name.
KEYWORDS : shared library libc.so resolver nameserver
PRODUCT : DNS
----- End Included Message -----
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