Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 131 insertions, 0 deletions

diff --git a/REORG.TODO/socket/tst-accept4.c b/REORG.TODO/socket/tst-accept4.c
new file mode 100644
index 0000000000..a5cf3a237b
--- /dev/null
+++ b/REORG.TODO/socket/tst-accept4.c
@@ -0,0 +1,131 @@
+/* Test the accept4 function with differing flags arguments.
+   Copyright (C) 2017 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <support/check.h>
+#include <support/xsocket.h>
+#include <support/xunistd.h>
+#include <sys/socket.h>
+
+static bool
+is_nonblocking (int fd)
+{
+  int status = fcntl (fd, F_GETFL);
+  if (status < 0)
+    FAIL_EXIT1 ("fcntl (F_GETFL): %m");
+  return status & O_NONBLOCK;
+}
+
+static bool
+is_cloexec (int fd)
+{
+  int status = fcntl (fd, F_GETFD);
+  if (status < 0)
+    FAIL_EXIT1 ("fcntl (F_GETFD): %m");
+  return status & FD_CLOEXEC;
+}
+
+struct client
+{
+  int socket;
+  struct sockaddr_in address;
+};
+
+/* Perform a non-blocking connect to *SERVER_ADDRESS.  */
+static struct client
+client_connect (const struct sockaddr_in *server_address)
+{
+  struct client result;
+  result.socket = xsocket (AF_INET,
+                           SOCK_STREAM | SOCK_NONBLOCK | SOCK_CLOEXEC, 0);
+  TEST_VERIFY (is_nonblocking (result.socket));
+  TEST_VERIFY (is_cloexec (result.socket));
+  int ret = connect (result.socket, (const struct sockaddr *) server_address,
+                     sizeof (*server_address));
+  if (ret < 0 && errno != EINPROGRESS)
+    FAIL_EXIT1 ("client connect: %m");
+  socklen_t sa_len = sizeof (result.address);
+  xgetsockname (result.socket, (struct sockaddr *) &result.address,
+                &sa_len);
+  TEST_VERIFY (sa_len == sizeof (result.address));
+  return result;
+}
+
+static void
+check_same_address (const struct sockaddr_in *left,
+                    const struct sockaddr_in *right)
+{
+  TEST_VERIFY (left->sin_family == AF_INET);
+  TEST_VERIFY (right->sin_family == AF_INET);
+  TEST_VERIFY (left->sin_addr.s_addr == right->sin_addr.s_addr);
+  TEST_VERIFY (left->sin_port == right->sin_port);
+}
+
+static int
+do_test (void)
+{
+  /* Create server socket.  */
+  int server_socket = xsocket (AF_INET, SOCK_STREAM, 0);
+  TEST_VERIFY (!is_nonblocking (server_socket));
+  TEST_VERIFY (!is_cloexec (server_socket));
+  struct sockaddr_in server_address =
+    {
+      .sin_family = AF_INET,
+      .sin_addr = {.s_addr = htonl (INADDR_LOOPBACK) },
+    };
+  xbind (server_socket,
+         (struct sockaddr *) &server_address, sizeof (server_address));
+  {
+    socklen_t sa_len = sizeof (server_address);
+    xgetsockname (server_socket, (struct sockaddr *) &server_address,
+                  &sa_len);
+    TEST_VERIFY (sa_len == sizeof (server_address));
+  }
+  xlisten (server_socket, 5);
+
+  for (int do_nonblock = 0; do_nonblock < 2; ++do_nonblock)
+    for (int do_cloexec = 0; do_cloexec < 2; ++do_cloexec)
+      {
+        int sockflags = 0;
+        if (do_nonblock)
+          sockflags |= SOCK_NONBLOCK;
+        if (do_cloexec)
+          sockflags |= SOCK_CLOEXEC;
+
+        struct client client = client_connect (&server_address);
+        struct sockaddr_in client_address;
+        socklen_t sa_len = sizeof (client_address);
+        int client_socket = xaccept4 (server_socket,
+                                      (struct sockaddr *) &client_address,
+                                      &sa_len, sockflags);
+        TEST_VERIFY (sa_len == sizeof (client_address));
+        TEST_VERIFY (is_nonblocking (client_socket) == do_nonblock);
+        TEST_VERIFY (is_cloexec (client_socket) == do_cloexec);
+        check_same_address (&client.address, &client_address);
+        xclose (client_socket);
+        xclose (client.socket);
+      }
+
+  xclose (server_socket);
+  return 0;
+}
+
+#include <support/test-driver.c>