[Nagiosplug-help] check_nt runs but just reports "(null)"

[Kevin O'Donnell]

Hi list!

I've performed the obligatory mailing list search but could not find any 
previous reports of my problem.  If anyone has seen this type of 
behaviour before I would really appreciate any help.

Every time I run check_nt, it just returns "(null)" and exists with code 
212.  I am using the precompiled version of check_nt from 
Distrib-1.06.2.zip on a Debian 3.0 box.  I've confirmed that the 
NSClient service is running on the destination windows server.

Thanks for your help!
Kevin.

% cd /src/NSClient-1.06.2/LinuxBin
% ./check_nt -H 192.168.20.57
(null)
% echo $?
212
% uname -a
Linux moseley 2.4.19 #3 SMP Mon Nov 25 08:53:44 PST 2002 i686 unknown

The service is running on my windows box.

% telnet 192.168.20.57 1248
Trying 192.168.20.57...
Connected to 192.168.20.57.
Escape character is '^]'.
Hi
ERROR:Wrong password^]
telnet> quit
Connection closed.

On a lark, I compiled check_nt from scract with no change in the 
results.  I had to change all references to "ssprintf" to "asprintf"
for this to work.  This still fails, though the exit code is different 
now.  (!)

% cd /src/NSClient-1.06.2/UnixSource
% gcc -o check_nt \
     -I/src/nagios-plugins-1.3.0-beta2/plugins \
     -L/usr/lib \
     /src/nagios-plugins-1.3.0-beta2/plugins/netutils.o \
     /src/nagios-plugins-1.3.0-beta2/plugins/utils.o \
     check_nt.c
% ./check_nt -H 192.168.20.57
(null)
% echo $?
192

And lastly, here is the output from a strace:

% strace ./check_nt -H 192.168.20.57
execve("./check_nt", ["./check_nt", "-H", "192.168.20.57"], [/* 22 vars 
*/]) = 0
uname({sys="Linux", node="moseley", ...}) = 0
brk(0)                                  = 0x804df20
open("/etc/ld.so.preload", O_RDONLY)    = -1 ENOENT (No such file or 
directory)
open("/usr/local/qt/lib/i686/mmx/libnsl.so.1", O_RDONLY) = -1 ENOENT (No 
such file or directory)
stat64("/usr/local/qt/lib/i686/mmx", 0xbffff014) = -1 ENOENT (No such 
file or directory)
open("/usr/local/qt/lib/i686/libnsl.so.1", O_RDONLY) = -1 ENOENT (No 
such file or directory)
stat64("/usr/local/qt/lib/i686", 0xbffff014) = -1 ENOENT (No such file 
or directory)
open("/usr/local/qt/lib/mmx/libnsl.so.1", O_RDONLY) = -1 ENOENT (No such 
file or directory)
stat64("/usr/local/qt/lib/mmx", 0xbffff014) = -1 ENOENT (No such file or 
directory)
open("/usr/local/qt/lib/libnsl.so.1", O_RDONLY) = -1 ENOENT (No such 
file or directory)
stat64("/usr/local/qt/lib", 0xbffff014) = -1 ENOENT (No such file or 
directory)
open("i686/mmx/libnsl.so.1", O_RDONLY)  = -1 ENOENT (No such file or 
directory)
open("i686/libnsl.so.1", O_RDONLY)      = -1 ENOENT (No such file or 
directory)
open("mmx/libnsl.so.1", O_RDONLY)       = -1 ENOENT (No such file or 
directory)
open("libnsl.so.1", O_RDONLY)           = -1 ENOENT (No such file or 
directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=14905, ...}) = 0
old_mmap(NULL, 14905, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40014000
close(3)                                = 0
open("/lib/libnsl.so.1", O_RDONLY)      = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0 ;\0\000"..., 
1024) = 1024
fstat64(3, {st_mode=S_IFREG|0644, st_size=69472, ...}) = 0
old_mmap(NULL, 80988, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x40018000
mprotect(0x40029000, 11356, PROT_NONE)  = 0
old_mmap(0x40029000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 
3, 0x10000) = 0x40029000
old_mmap(0x4002a000, 7260, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4002a000
close(3)                                = 0
open("i686/mmx/libresolv.so.2", O_RDONLY) = -1 ENOENT (No such file or 
directory)
open("i686/libresolv.so.2", O_RDONLY)   = -1 ENOENT (No such file or 
directory)
open("mmx/libresolv.so.2", O_RDONLY)    = -1 ENOENT (No such file or 
directory)
open("libresolv.so.2", O_RDONLY)        = -1 ENOENT (No such file or 
directory)
open("/lib/libresolv.so.2", O_RDONLY)   = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300\'\0"..., 
1024) = 1024
fstat64(3, {st_mode=S_IFREG|0644, st_size=56480, ...}) = 0
old_mmap(NULL, 65312, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x4002c000
mprotect(0x40039000, 12064, PROT_NONE)  = 0
old_mmap(0x40039000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 
3, 0xd000) = 0x40039000
old_mmap(0x4003a000, 7968, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4003a000
close(3)                                = 0
open("i686/mmx/libc.so.6", O_RDONLY)    = -1 ENOENT (No such file or 
directory)
open("i686/libc.so.6", O_RDONLY)        = -1 ENOENT (No such file or 
directory)
open("mmx/libc.so.6", O_RDONLY)         = -1 ENOENT (No such file or 
directory)
open("libc.so.6", O_RDONLY)             = -1 ENOENT (No such file or 
directory)
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\30\222"..., 
1024) = 1024
fstat64(3, {st_mode=S_IFREG|0755, st_size=1153784, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 
-1, 0) = 0x4003c000
old_mmap(NULL, 1166560, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x4003d000
mprotect(0x40150000, 40160, PROT_NONE)  = 0
old_mmap(0x40150000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 
3, 0x113000) = 0x40150000
old_mmap(0x40156000, 15584, PROT_READ|PROT_WRITE, 
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x40156000
close(3)                                = 0
munmap(0x40014000, 14905)               = 0
brk(0)                                  = 0x804df20
brk(0x804df40)                          = 0x804df40
brk(0x804e000)                          = 0x804e000
rt_sigaction(SIGALRM, {0x804a1a0, [ALRM], SA_RESTART|0x4000000}, 
{SIG_DFL}, 8) = 0
alarm(10)                               = 0
alarm(0)                                = 10
fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 8), ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 
-1, 0) = 0x40014000
write(1, "(null)\n", 7)                 = 7
munmap(0x40014000, 4096)                = 0
_exit(-1073743900)                      = ?