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-rw-r--r--apps/examples/ostest/waitpid.c269
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diff --git a/apps/examples/ostest/waitpid.c b/apps/examples/ostest/waitpid.c
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+/****************************************************************************
+ * examples/ostest/waitpid.c
+ *
+ * Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/wait.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <signal.h>
+#include <errno.h>
+
+#include "ostest.h"
+
+#ifdef CONFIG_SCHED_WAITPID
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define RETURN_STATUS 14
+#define NCHILDREN 3
+#define PRIORITY 100
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static int g_waitpids[NCHILDREN];
+
+/****************************************************************************
+ * Priviate Functions
+ ****************************************************************************/
+
+static int waitpid_main(int argc, char *argv[])
+{
+ pid_t me = getpid();
+
+ printf("waitpid_main: PID %d Started\n", me);
+ sleep(3);
+ printf("waitpid_main: PID %d exitting with result=%d\n", me, RETURN_STATUS);
+ return RETURN_STATUS;
+}
+
+static void waitpid_start_children(void)
+{
+ int ret;
+ int i;
+
+ for (i = 0; i < NCHILDREN; i++)
+ {
+ ret = TASK_CREATE("waitpid", PRIORITY, STACKSIZE, waitpid_main, NULL);
+ if (ret < 0)
+ {
+ printf("waitpid_start_child: ERROR Failed to start user_main\n");
+ }
+ else
+ {
+ printf("waitpid_start_child: Started waitpid_main at PID=%d\n", ret);
+ }
+
+ g_waitpids[i] = ret;
+ }
+}
+
+static void waitpid_last(void)
+{
+ int stat_loc;
+ int ret;
+
+ printf("waitpid_last: Waiting for PID=%d with waitpid()\n",
+ g_waitpids[NCHILDREN-1]);
+
+ ret = (int)waitpid(g_waitpids[NCHILDREN-1], &stat_loc, 0);
+ if (ret < 0)
+ {
+ int errcode = errno;
+ printf("waitpid_last: ERROR: PID %d waitpid failed: %d\n",
+ g_waitpids[NCHILDREN-1], errcode);
+ }
+ else if (stat_loc != RETURN_STATUS)
+ {
+ printf("waitpid_last: ERROR: PID %d return status is %d, expected %d\n",
+ g_waitpids[NCHILDREN-1], stat_loc, RETURN_STATUS);
+ }
+ else
+ {
+ printf("waitpid_last: PID %d waitpid succeeded with stat_loc=%d\n",
+ g_waitpids[NCHILDREN-1], stat_loc);
+ }
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+int waitpid_test(void)
+{
+#ifdef CONFIG_SCHED_HAVE_PARENT
+ siginfo_t info;
+#endif
+ int stat_loc;
+ int ret;
+
+ /* Start the children and wait for first one to complete */
+
+ printf("\nTest waitpid()\n");
+ waitpid_start_children();
+
+ printf("waitpid_test: Waiting for PID=%d with waitpid()\n", g_waitpids[0]);
+ ret = (int)waitpid(g_waitpids[0], &stat_loc, 0);
+ if (ret < 0)
+ {
+ int errcode = errno;
+ printf("waitpid_test: ERROR: PID %d waitpid failed: %d\n",
+ g_waitpids[0], errcode);
+ }
+ else if (ret != g_waitpids[0])
+ {
+ printf("waitpid_test: ERROR: PID %d wait returned PID %d\n",
+ g_waitpids[0], ret);
+ }
+ else if (stat_loc != RETURN_STATUS)
+ {
+ printf("waitpid_test: ERROR: PID %d return status is %d, expected %d\n",
+ g_waitpids[0], stat_loc, RETURN_STATUS);
+ }
+ else
+ {
+ printf("waitpid_test: PID %d waitpid succeeded with stat_loc=%d\n",
+ g_waitpids[0], stat_loc);
+ }
+
+ /* Wait a big to make sure that the other threads complete */
+
+ waitpid_last();
+ sleep(1);
+
+#ifdef CONFIG_SCHED_HAVE_PARENT
+ /* Start the children and wait for first one to complete */
+
+ printf("\nTest waitid(P_PID)\n");
+ waitpid_start_children();
+
+ printf("waitpid_test: Waiting for PID=%d with waitid()\n", g_waitpids[0]);
+ ret = waitid(P_PID, (id_t)g_waitpids[0], &info, WEXITED);
+ if (ret < 0)
+ {
+ int errcode = errno;
+ printf("waitpid_test: ERROR: PID %d waitid failed: %d\n",
+ g_waitpids[0], errcode);
+ }
+ else if (info.si_pid != g_waitpids[0])
+ {
+ printf("waitpid_test: ERROR: PID %d waitid returned PID %d\n",
+ g_waitpids[0], info.si_pid);
+ }
+ else if (info.si_status != RETURN_STATUS)
+ {
+ printf("waitpid_test: ERROR: PID %d return status is %d, expected %d\n",
+ info.si_pid, info.si_status, RETURN_STATUS);
+ }
+ else
+ {
+ printf("waitpid_test: waitid PID %d succeeded with si_status=%d\n",
+ info.si_pid, info.si_status);
+ }
+
+ /* Wait a big to make sure that the other threads complete */
+
+ waitpid_last();
+ sleep(1);
+
+ /* Start the children and wait for any one to complete */
+
+ printf("\nTest waitid(P_ALL)\n");
+ waitpid_start_children();
+
+ printf("waitpid_test: Waiting for any child with waitid()\n");
+ ret = waitid(P_ALL, 0, &info, WEXITED);
+ if (ret < 0)
+ {
+ int errcode = errno;
+ printf("waitpid_test: ERROR: waitid failed: %d\n", errcode);
+ }
+ else if (info.si_status != RETURN_STATUS)
+ {
+ printf("waitpid_test: ERROR: PID %d return status is %d, expected %d\n",
+ info.si_pid, info.si_status, RETURN_STATUS);
+ }
+ else
+ {
+ printf("waitpid_test: PID %d waitid succeeded with si_status=%d\n",
+ info.si_pid, info.si_status);
+ }
+
+ /* Wait a big to make sure that the other threads complete */
+
+ waitpid_last();
+ sleep(1);
+
+ /* Start the children and wait for first one to complete */
+
+ printf("\nTest wait()\n");
+ waitpid_start_children();
+
+ printf("waitpid_test: Waiting for any child with wait()\n");
+ ret = (int)wait(&stat_loc);
+ if (ret < 0)
+ {
+ int errcode = errno;
+ printf("waitpid_test: ERROR: wait failed: %d\n", errcode);
+ }
+ else if (stat_loc != RETURN_STATUS)
+ {
+ printf("waitpid_test: ERROR: PID %d return status is %d, expected %d\n",
+ ret, stat_loc, RETURN_STATUS);
+ }
+ else
+ {
+ printf("waitpid_test: PID %d wait succeeded with stat_loc=%d\n",
+ ret, stat_loc);
+ }
+
+ /* Wait a big to make sure that the other threads complete */
+
+ waitpid_last();
+ sleep(1);
+#endif
+
+ return 0;
+}
+
+#endif /* CONFIG_SCHED_WAITPID */
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