PURPOSE of /tools/glibc/Regression/bz501595-RHEL4-getnameinfo-should-return-EAI-NONAME
Description: Test for bz501595 ([RHEL4] getnameinfo() should return EAI_NONAME)
Author: Petr Muller <pmuller@redhat.com>
Bug summary: [RHEL4] getnameinfo() should return EAI_NONAME when both nodename and servname are set to null and flag is set to NI_NAMEREQD
Bugzilla link: https://bugzilla.redhat.com/show_bug.cgi?id=501595

Description:

+++ This bug was initially created as a clone of Bug #489419 +++

Description of Problem:
glibc getnameinfo() returns 0 when both nodename and servname are set to null and flag is set to 'NI_NAMEREQD'.

The synopsis of function getnameinfo is:
       int getnameinfo(const struct sockaddr *sa, socklen_t salen, char *node, socklen_t nodelen, char *service, socklen_t servicelen, int flags);

RFC3493 tells that getnameinfo() should returns 'EAI_NONAME' when both nodename and servname are null.  So when use getnameinfo() with both nodename and servname are null and the NI_NAMEREQD flag is set, glibc should return 'EAI_NONAME' rather than 0.


Version-Release number of selected component:
glibc-2.3.4-2.43


How reproducible:
every time


Step to Reproduce:
1. gcc function-nodename-servname-null.c
2. ./a.out


Actual Results:
# ./a.out
==Both nodename and servname are null if the NI_NAMEREQD flag is set==
ERROR:return 0, expect error EAI_NONAME
<=== NG ===>


Expected Results:
# ./a.out
==Both nodename and servname are null if the NI_NAMEREQD flag is set==
<=== OK ===>


Additional Info:
Upstream patch:
http://sourceware.org/cgi-bin/cvsweb.cgi/libc/inet/getnameinfo.c.diff?r1=1.36&r2=1.37&cvsroot=glibc