BIND8, BIND9 static compilation problems

[Ivan Ivanovic]

----- Original Message ----- 
From: Mark Andrews
Sent: Friday, September 26, 2003 01:50
Subject: Re: BIND8, BIND9 static compilation problems 

Quoting Mark Andrews:
> Glibc contains a weak references to handle the differences
> between threaded and non-threaded builds.  BIND 8.4.2
> contains a work-around.
>
> lib/irs/irs_data.c:
> #ifdef _REENTRANT
> struct __res_state *
> .....................
> #endif

Hi Mark!
First, BIG thanks for your effort! Your patch helped me in creating
static binaries. You said that 8.4.2 contains corrections to this
problem but I didn't find 8.4.2 src on ftp.isc.org so I manually 
applied your patch to lib/irs/irs_data.c. It' worked fine :)

ldd named	not a dynamic executable
ldd named-xfer	not a dynamic executable

-rwxr-xr-x 1 dns dns   1173437 Sep 26 15:14 named
-rwxr-xr-x 1 dns dns	846726 Sep 26 15:14 named-xfer

named -v       
named 8.4.1-REL Fri Sep 26 15:07:39 CEST 2003

that's cool, but new problems arrived, as I couldn't start named
in chroot environment with -u and -g flags. Without -u/-g flags, 
named started successfully in chroot env of course started by root
user again. 


# chroot /chroot/dns /sbin/named -u dns -g dns
user "dns" unknown

etc/
ls -la 
-r--r--r--    1 root     root           11 Sep 26 15:27 group
-r--r--r--    1 root     root          696 Sep 26 15:26 localtime
-r--r--r--    1 root     root         7912 Sep 27 17:26 named.conf
-r--r--r--    1 root     root           27 Sep 27 17:32 passwd
-r--r--r--    1 root     root         5748 Sep 27 16:53 protocols
-r--r--r--    1 root     root           43 Sep 27 17:25 resolv.conf
-r--r--r--    1 root     root          150 Sep 27 17:19 services

cat passwd 
dns:x:1002:102::/:

cat group 
dns:x:102:

d--x--x--x    2 root     root         4096 Sep 26 15:24 dev/
drwxr-xr-x    2 root     root         4096 Sep 27 18:45 etc/
d--x--x--x    2 root     root         4096 Sep 27 18:17 sbin/
drwxr-xr-x    5 dns      dns          4096 Sep 26 15:13 var/


Now, as created all necessary directories and put all needed
files in, I was curios what more bind need, so I used statically
compiled strace.

chroot /chroot/dns sbin/strace -o trace.out /sbin/named -u dns -g dns

And voala, I get some interesting output from trace.out log file:

-- snip --

execve("/sbin/named", ["/sbin/named", "-u", "dns", "-g", "dns"], [/* 25 
vars */]) = 0
fcntl64(0, F_GETFD)                     = 0
fcntl64(1, F_GETFD)                     = 0
fcntl64(2, F_GETFD)                     = 0
geteuid32()                             = 0
getuid32()                              = 0
getegid32()                             = 0
getgid32()                              = 0
brk(0)                                  = 0x8155d48
brk(0x8156d48)                          = 0x8156d48
brk(0x8157000)                          = 0x8157000
brk(0x8158000)                          = 0x8158000
brk(0x815c000)                          = 0x815c000
old_mmap(NULL, 266240, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40000000
getuid32()                              = 0
getgid32()                              = 0
gettimeofday({1064682873, 942469}, NULL) = 0
getpid()                                = 4968
umask(022)                              = 022
socket(PF_UNIX, SOCK_STREAM, 0)         = 3
connect(3, {sa_family=AF_UNIX, path="/var/run/.nscd_socket"}, 110) = -1 
ENOENT (No such file or directory)
close(3)                                = 0
open("/etc/nsswitch.conf", O_RDONLY)    = -1 ENOENT (No such file or 
directory)
open("/etc/ld.so.cache", O_RDONLY)      = -1 ENOENT (No such file or 
directory)
open("/lib/libnss_compat.so.2", O_RDONLY) = -1 ENOENT (No such file or 
directory)
stat64("/lib", 0xbffff240)              = -1 ENOENT (No such file or 
directory)
open("/usr/lib/libnss_compat.so.2", O_RDONLY) = -1 ENOENT (No such file 
or directory)
stat64("/usr/lib", 0xbffff240)          = -1 ENOENT (No such file or 
directory)
write(2, "user \"dns\" unknown\n", 19)  = 19
exit_group(1)                           = ?

-- snap --

Why statically compiled binary send request for:
	/lib
	/usr/lib
	/etc/ld.so.cache
	/lib/libnss_compat.so.2
	/lib/libnss_files.so.2

Now, I grep't thru bind-src/ for "dlopen" and only 
binary files matched(?)

egrep -r "dlopen" src/*
Binary file src/bin/named/named matches
Binary file src/bin/named-xfer/named-xfer matches
Binary file src/bin/addr/addr matches
Binary file src/bin/dig/dig matches
Binary file src/bin/dnskeygen/dnskeygen matches
Binary file src/bin/dnsquery/dnsquery matches
Binary file src/bin/host/host matches
Binary file src/bin/irpd/irpd matches
Binary file src/bin/mkservdb/mkservdb matches
Binary file src/bin/ndc/ndc matches
Binary file src/bin/nslookup/nslookup matches
Binary file src/bin/nsupdate/nsupdate matches


Please advise... :)

Thanks again 
Ivan