Move getaddrinfo from 'posix' into 'nss'

getaddrinfo is an entry point for nss functionality.  This commit moves
it from 'sysdeps/posix' to 'nss', gets rid of the stub in 'posix', and
moves all associated tests as well.
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 67 insertions, 0 deletions

diff --git a/nss/tst-getaddrinfo4.c b/nss/tst-getaddrinfo4.c
new file mode 100644
index 0000000000..a5f1f628e9
--- /dev/null
+++ b/nss/tst-getaddrinfo4.c
@@ -0,0 +1,67 @@
+/* Test getaddrinfo return value, [BZ #15339].
+   Copyright (C) 2013-2023 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <netdb.h>
+
+static int
+try (const char *service, int family, int flags)
+{
+  struct addrinfo hints, *h, *ai;
+  int res;
+
+  memset (&hints, 0, sizeof hints);
+  hints.ai_family = family;
+  hints.ai_flags = flags;
+
+  errno = 0;
+  h = (family || flags) ? &hints : NULL;
+  res = getaddrinfo ("example.net", service, h, &ai);
+  switch (res)
+    {
+    case 0:
+    case EAI_AGAIN:
+    case EAI_NONAME:
+      printf ("SUCCESS getaddrinfo(service=%s, family=%d, flags=%d): %s: %m\n",
+              service ?: "NULL", family, flags, gai_strerror (res));
+      return 0;
+    }
+  printf ("FAIL getaddrinfo(service=%s, family=%d, flags=%d): %s: %m\n",
+          service ?: "NULL", family, flags, gai_strerror (res));
+  return 1;
+}
+
+static int
+do_test (void)
+{
+  int err = 0;
+  err |= try (NULL, 0, 0);
+  err |= try (NULL, AF_UNSPEC, AI_ADDRCONFIG);
+  err |= try (NULL, AF_INET, 0);
+  err |= try (NULL, AF_INET6, 0);
+  err |= try ("http", 0, 0);
+  err |= try ("http", AF_UNSPEC, AI_ADDRCONFIG);
+  err |= try ("http", AF_INET, 0);
+  err |= try ("http", AF_INET6, 0);
+  return err;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"