[glibc] nss: Fix tst-nss-files-hosts-long on single-stack hosts (bug 24816)

[Florian Weimer <fw@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c75d20b5b27b0a60f0678236f51a4d3b0b058c00

commit c75d20b5b27b0a60f0678236f51a4d3b0b058c00
Author: Florian Weimer <fweimer@redhat.com>
Date:   Tue Sep 13 16:11:40 2022 +0200

    nss: Fix tst-nss-files-hosts-long on single-stack hosts (bug 24816)
    
    getent implicitly passes AI_ADDRCONFIG to getaddrinfo by default.
    Use --no-addrconfig to suppress that, so that both IPv4 and IPv6
    lookups succeed even if the address family is not supported by the
    host.
    
    Reviewed-by: Carlos O'Donell <carlos@redhat.com>

Diff:
---
 nss/tst-nss-files-hosts-long.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/nss/tst-nss-files-hosts-long.c b/nss/tst-nss-files-hosts-long.c
index 3942cf5fca..a7697e3143 100644
--- a/nss/tst-nss-files-hosts-long.c
+++ b/nss/tst-nss-files-hosts-long.c
@@ -28,14 +28,15 @@ do_test (void)
 {
   int ret;
 
-  /* Run getent to fetch the IPv4 address for host test4.
-     This forces /etc/hosts to be parsed.  */
-  ret = system("getent ahostsv4 test4");
+  /* Run getent to fetch the IPv4 address for host test4.  This forces
+     /etc/hosts to be parsed.  Use --no-addrconfig to return addresses
+     even in an IPv6-only environment.  */
+  ret = system("getent --no-addrconfig ahostsv4 test4");
   if (ret != 0)
     FAIL_EXIT1("ahostsv4 failed");
 
   /* Likewise for IPv6.  */
-  ret = system("getent ahostsv6 test6");
+  ret = system("getent --no-addrconfig  ahostsv6 test6");
   if (ret != 0)
     FAIL_EXIT1("ahostsv6 failed");