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, 69 insertions, 0 deletions

diff --git a/nss/tst-getaddrinfo5.c b/nss/tst-getaddrinfo5.c
new file mode 100644
index 0000000..26a1643
--- /dev/null
+++ b/nss/tst-getaddrinfo5.c
@@ -0,0 +1,69 @@
+/* Test host lookup with double dots at the end, [BZ #16469].
+   Copyright (C) 2014-2023 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 <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <string.h>
+
+static int
+test (void)
+{
+  static char host1[] = "localhost..";
+  static char host2[] = "www.gnu.org..";
+  static char *hosts[] = { host1, host2 };
+  int i;
+  int pass = 0;
+
+  for (i = 0; i < sizeof (hosts) / sizeof (*hosts); i++)
+    {
+      char *host = hosts[i];
+      size_t len = strlen (host);
+      struct addrinfo *ai;
+
+      /* If the name doesn't resolve with a single dot at the
+	 end, skip it.  */
+      host[len-1] = 0;
+      if (getaddrinfo (host, NULL, NULL, &ai) != 0)
+	{
+	  printf ("resolving \"%s\" failed, skipping this hostname\n", host);
+	  continue;
+	}
+      printf ("resolving \"%s\" worked, proceeding to test\n", host);
+      freeaddrinfo (ai);
+
+      /* If it resolved with a single dot, check that it doesn't with
+	 a second trailing dot.  */
+      host[len-1] = '.';
+      if (getaddrinfo (host, NULL, NULL, &ai) == 0)
+	{
+	  printf ("resolving \"%s\" worked, test failed\n", host);
+	  return 1;
+	}
+      printf ("resolving \"%s\" failed, test passed\n", host);
+      pass = 1;
+    }
+
+  /* We want at least one successful name resolution for the test to
+     succeed.  */
+  return pass ? 0 : 2;
+}
+
+#define TEST_FUNCTION test ()
+#include "../test-skeleton.c"