Am 19.04.20 um 10:00 schrieb Hubert Garavel:
Hi everyone,
At University Grenoble Alpes, I launched a master student project to try
fixing some bugs in Illumos/OpenIndiana. This way, the student can learn
the basics of an operating system, use Git, recompile a kernel, see
real-life C code, and so on.
As a first assignment, I chose bug #10041 (why does domainname display
" " instead of "") - https://www.illumos.org/issues/10041
I was initially expecting some error in character string handling,
like a pointer incremented one time too much. But, after looking
at the code of
illumos-gate/usr/src/cmd/keyserv/domainname.c
then, the code of getdomainname() in
illumos-gate/usr/src/lib/libnsl/rpc/getdname.c
and finally the code of sysinfo (SI_SRPC_DOMAIN, ...) in
illumos-gate/usr/src/uts/common/syscall/systeminfo.c
they all seem to be correct.
So, our current assumption is that, when the system boots, some
service modifies the domain name (initially set to "") to insert
a white space (" "). Potential suspects could be:
/proto/root_i386/usr/lib/ldap/idsconfig
/usr/src/cmd/svc/milestone/identity-domain
etc.
To find the right one, it would be helpful to trace the result
of the "domainname" command at every step of the boot sequence,
especially every time a service is launched.
Is there an easy way of doing this, e.g., using SMF or Dtrace?
(rather than manually patching the start scripts of all services).
Thanks for your help
Hubert
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Are you sure that this bug is still present in latest OI Hipster?
Here:
─➤ domainname | od -t a
0000000 lf
0000001
everything seems to be as expected.
Regards,
Andreas
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