Flesh out <sys/msg.h>, <sys/sem.h>, <sys/shm.h>.
Also fix <sys/ipc.h>.
Not useful except to systems/bringup folks for testing. Trivial tests
added, and double-checked under strace to see that things look right.
x86 -- which works differently to everything else -- tested on the host.
Bug: http://b/27952303
Change-Id: I328534e994ae9e90755f545478fba03038c0bb94
diff --git a/tests/sys_sem_test.cpp b/tests/sys_sem_test.cpp
new file mode 100644
index 0000000..5acc792
--- /dev/null
+++ b/tests/sys_sem_test.cpp
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <gtest/gtest.h>
+
+#include <errno.h>
+#include <sys/sem.h>
+
+#include "TemporaryFile.h"
+
+TEST(sys_sem, smoke) {
+ // Create a semaphore.
+ TemporaryDir dir;
+ key_t key = ftok(dir.dirname, 1);
+ int id = semget(key, 1, IPC_CREAT|0666);
+ ASSERT_NE(id, -1);
+
+ // Check semaphore info.
+ semid_ds ds;
+ memset(&ds, 0, sizeof(ds));
+ ASSERT_EQ(0, semctl(id, 0, IPC_STAT, &ds));
+ ASSERT_EQ(1U, ds.sem_nsems);
+
+ ASSERT_EQ(0, semctl(id, 0, GETVAL));
+
+ // Increment.
+ sembuf ops[] = {{ .sem_num = 0, .sem_op = 1, .sem_flg = 0 }};
+ ASSERT_EQ(0, semop(id, ops, 1));
+ ASSERT_EQ(1, semctl(id, 0, GETVAL));
+
+ // Test timeouts.
+ timespec ts = { .tv_sec = 0, .tv_nsec = 100 };
+ ops[0] = { .sem_num = 0, .sem_op = 0, .sem_flg = 0 };
+ errno = 0;
+ ASSERT_EQ(-1, semtimedop(id, ops, 1, &ts));
+ ASSERT_EQ(EAGAIN, errno);
+ ASSERT_EQ(1, semctl(id, 0, GETVAL));
+
+ // Decrement.
+ ops[0] = { .sem_num = 0, .sem_op = -1, .sem_flg = 0 };
+ ASSERT_EQ(0, semop(id, ops, 1));
+ ASSERT_EQ(0, semctl(id, 0, GETVAL));
+
+ // Destroy the semaphore.
+ ASSERT_EQ(0, semctl(id, 0, IPC_RMID));
+}
+
+TEST(sys_sem, semget_failure) {
+ errno = 0;
+ ASSERT_EQ(-1, semget(-1, -1, 0));
+ ASSERT_EQ(EINVAL, errno);
+}
+
+TEST(sys_sem, semctl_failure) {
+ errno = 0;
+ ASSERT_EQ(-1, semctl(-1, 0, IPC_RMID));
+ ASSERT_EQ(EINVAL, errno);
+}
+
+TEST(sys_sem, semop_failure) {
+ errno = 0;
+ ASSERT_EQ(-1, semop(-1, nullptr, 0));
+ ASSERT_EQ(EINVAL, errno);
+}
+
+TEST(sys_sem, semtimedop_failure) {
+ errno = 0;
+ ASSERT_EQ(-1, semtimedop(-1, nullptr, 0, nullptr));
+ ASSERT_EQ(EINVAL, errno);
+}