File glibc-fix-double-loopback.diff of Package glibc.7761
This fixes the problem of getent ahosts localhost returning 127.0.0.1
_twice_ on systems that have no ipv6 interfaces up (hence are regarded
as ipv4 only by the lookup code), but still have localhost entries for
::1 and 127.0.0.1 in /etc/hosts (like most current systems).
Remapping ::1 to 127.0.0.1 is bogus when /etc/hosts is correct.
bnc #684534, #606980
http://sources.redhat.com/bugzilla/show_bug.cgi?id=4980
Index: glibc-2.17.90/nss/nss_files/files-hosts.c
===================================================================
--- glibc-2.17.90.orig/nss/nss_files/files-hosts.c
+++ glibc-2.17.90/nss/nss_files/files-hosts.c
@@ -68,11 +68,6 @@ LINE_PARSER
{
if (IN6_IS_ADDR_V4MAPPED (entdata->host_addr))
memcpy (entdata->host_addr, entdata->host_addr + 12, INADDRSZ);
- else if (IN6_IS_ADDR_LOOPBACK (entdata->host_addr))
- {
- in_addr_t localhost = htonl (INADDR_LOOPBACK);
- memcpy (entdata->host_addr, &localhost, sizeof (localhost));
- }
else
/* Illegal address: ignore line. */
return 0;