Add accept4 unit test to bionic.

Change-Id: I1cce5fb8dab16f03164fdd288f35a814d7c49c6a

tests/Android.mk

@@ -81,6 +81,7 @@ libBionicStandardTests_src_files := \
     system_properties_test.cpp \
     time_test.cpp \
     unistd_test.cpp \
+    accept4_test.cpp \
 
 libBionicStandardTests_cflags := \
     $(test_cflags) \

tests/accept4_test.cpp

@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * Contributed by: Intel Corporation, 2014
+ */
+
+#include <gtest/gtest.h>
+
+#if defined(__BIONIC__)
+  #define SOCK_CLOEXEC_SUPPORTED 1
+#elif defined(__GLIBC_PREREQ)
+  #if __GLIBC_PREREQ(2, 9)
+    #define SOCK_CLOEXEC_SUPPORTED 1
+  #endif
+#endif
+
+#if defined(SOCK_CLOEXEC_SUPPORTED)
+
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <fcntl.h>
+
+#define SOCK_PATH "test"
+
+static void* ConnectFn(void*) {
+  int fd = socket(PF_UNIX, SOCK_SEQPACKET | SOCK_CLOEXEC | SOCK_NONBLOCK, 0);
+  if (fd < 0) {
+    GTEST_LOG_(ERROR) << "socket call failed: " << strerror(errno);
+    return reinterpret_cast<void*>(-1);
+  }
+
+  struct sockaddr_un addr;
+  memset(&addr, 0, sizeof(addr));
+  addr.sun_family = AF_UNIX;
+  addr.sun_path[0] = '\0';
+  strcpy(addr.sun_path + 1, SOCK_PATH);
+
+  if (connect(fd, reinterpret_cast<struct sockaddr*>(&addr), sizeof(addr)) < 0) {
+    GTEST_LOG_(ERROR) << "connect call failed: " << strerror(errno);
+    close(fd);
+    return reinterpret_cast<void*>(-1);
+  }
+
+  close(fd);
+
+  return NULL;
+}
+#endif
+
+TEST(accept4, smoke) {
+#if defined(SOCK_CLOEXEC_SUPPORTED)
+  int fd = socket(PF_UNIX, SOCK_SEQPACKET, 0);
+  ASSERT_NE(fd, -1) << strerror(errno);
+
+  struct sockaddr_un addr;
+  memset(&addr, 0, sizeof(addr));
+  addr.sun_family = AF_UNIX;
+  addr.sun_path[0] = '\0';
+  strcpy(addr.sun_path + 1, SOCK_PATH);
+
+  ASSERT_NE(-1, bind(fd, reinterpret_cast<struct sockaddr*>(&addr), sizeof(addr))) << strerror(errno);
+
+  ASSERT_NE(-1, listen(fd, 1)) << strerror(errno);
+
+  pthread_t thread;
+  ASSERT_EQ(0, pthread_create(&thread, NULL, ConnectFn, NULL));
+
+  fd_set read_set;
+  FD_ZERO(&read_set);
+  FD_SET(fd, &read_set);
+  timeval tv;
+  tv.tv_sec = 5;
+  tv.tv_usec = 0;
+  ASSERT_LT(0, select(fd+1, &read_set, NULL, NULL, &tv));
+
+  socklen_t len = sizeof(addr);
+  int fd_acc = accept4(fd, reinterpret_cast<struct sockaddr*>(&addr), &len, SOCK_CLOEXEC);
+  ASSERT_NE(fd_acc, -1) << strerror(errno);
+
+  // Check that the flag was set properly.
+  ASSERT_EQ(FD_CLOEXEC, fcntl(fd_acc, F_GETFD) & FD_CLOEXEC);
+
+  void* ret_val;
+  pthread_join(thread, &ret_val);
+  ASSERT_EQ(NULL, ret_val);
+
+  close(fd_acc);
+  close(fd);
+#else
+  GTEST_LOG_(INFO) << "This test does nothing.\n";
+#endif
+}