370 lines
11 KiB
C
370 lines
11 KiB
C
/****************************************************************************
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* examples/ostest/waitpid.c
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*
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* Copyright (C) 2013 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/wait.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <signal.h>
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#include <errno.h>
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#include "ostest.h"
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#ifdef CONFIG_SCHED_WAITPID
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define RETURN_STATUS 14
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#define NCHILDREN 3
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#define PRIORITY 100
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static int g_waitpids[NCHILDREN];
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/****************************************************************************
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* Priviate Functions
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****************************************************************************/
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#ifdef CONFIG_BUILD_KERNEL
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int main(int argc, FAR char *argv[])
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#else
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static int waitpid_main(int argc, char *argv[])
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#endif
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{
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pid_t me = getpid();
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printf("waitpid_main: PID %d Started\n", me);
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sleep(3);
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printf("waitpid_main: PID %d exitting with result=%d\n", me, RETURN_STATUS);
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return RETURN_STATUS;
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}
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static void waitpid_start_children(void)
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{
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int ret;
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int i;
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for (i = 0; i < NCHILDREN; i++)
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{
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ret = task_create("waitpid", PRIORITY, STACKSIZE, waitpid_main, NULL);
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if (ret < 0)
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{
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printf("waitpid_start_child: ERROR Failed to start waitpid_main\n");
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}
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else
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{
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printf("waitpid_start_child: Started waitpid_main at PID=%d\n", ret);
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}
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g_waitpids[i] = ret;
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}
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}
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static void waitpid_last(void)
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{
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pid_t pid = -1;
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int stat_loc;
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int ret;
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int i;
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/* Find the last child thread that was started successfully */
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for (i = NCHILDREN-1; i > 0; i--)
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{
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if (g_waitpids[i] >= 0)
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{
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pid = i;
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break;
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}
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}
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/* Is there any thread to wait for? */
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if (pid < 0)
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{
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printf("waitpid_last: ERROR: Nothing to wait for\n");
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return;
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}
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printf("waitpid_last: Waiting for PID=%d with waitpid()\n",
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g_waitpids[NCHILDREN-1]);
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ret = (int)waitpid(g_waitpids[NCHILDREN-1], &stat_loc, 0);
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if (ret < 0)
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{
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int errcode = errno;
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/* Unfortunately, this main thread does not retain child status. If
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* child status is enabled (via CONFIG_SCHED_CHILD_STATUS), ostest_main()
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* disables the feature by calling sigactin with SA_NOCLDWAIT.
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*/
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if (errcode == ECHILD)
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{
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printf("waitpid_last: PASS: PID %d waitpid failed with ECHILD. That may be\n",
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g_waitpids[NCHILDREN-1]);
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printf(" acceptable because child status is disabled on this thread.\n");
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}
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else
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{
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printf("waitpid_last: ERROR: PID %d waitpid failed: %d\n",
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g_waitpids[NCHILDREN-1], errcode);
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}
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}
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else if (WEXITSTATUS(stat_loc) != RETURN_STATUS)
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{
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printf("waitpid_last: ERROR: PID %d return status is %d, expected %d\n",
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g_waitpids[NCHILDREN-1], WEXITSTATUS(stat_loc), RETURN_STATUS);
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}
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else
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{
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printf("waitpid_last: PASS: PID %d waitpid succeeded with stat_loc=%04x\n",
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g_waitpids[NCHILDREN-1], stat_loc);
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}
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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int waitpid_test(void)
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{
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#ifdef CONFIG_SCHED_HAVE_PARENT
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siginfo_t info;
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#endif
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int stat_loc;
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int ret;
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/* Start the children and wait for first one to complete */
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printf("\nTest waitpid()\n");
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waitpid_start_children();
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printf("waitpid_test: Waiting for PID=%d with waitpid()\n", g_waitpids[0]);
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ret = (int)waitpid(g_waitpids[0], &stat_loc, 0);
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if (ret < 0)
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{
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int errcode = errno;
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/* Unfortunately, this main thread does not retain child status. If
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* child status is enabled (via CONFIG_SCHED_CHILD_STATUS), ostest_main()
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* disables the feature by calling sigactin with SA_NOCLDWAIT.
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*/
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if (errcode == ECHILD)
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{
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printf("waitpid_test: PASS: PID %d waitpid failed with ECHILD. That may be\n",
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g_waitpids[NCHILDREN-1]);
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printf(" acceptable because child status is disabled on this thread.\n");
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}
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else
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{
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printf("waitpid_test: ERROR: PID %d waitpid failed: %d\n",
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g_waitpids[0], errcode);
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}
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}
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else if (ret != g_waitpids[0])
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{
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printf("waitpid_test: ERROR: PID %d wait returned PID %d\n",
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g_waitpids[0], ret);
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}
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else if (WEXITSTATUS(stat_loc) != RETURN_STATUS)
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{
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printf("waitpid_test: ERROR: PID %d return status is %d, expected %d\n",
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g_waitpids[0], WEXITSTATUS(stat_loc), RETURN_STATUS);
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}
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else
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{
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printf("waitpid_test: PID %d waitpid succeeded with stat_loc=%04x\n",
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g_waitpids[0], stat_loc);
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}
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/* Wait a bit to make sure that the other threads complete */
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waitpid_last();
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sleep(1);
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#ifdef CONFIG_SCHED_HAVE_PARENT
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/* Start the children and wait for first one to complete */
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printf("\nTest waitid(P_PID)\n");
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waitpid_start_children();
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printf("waitpid_test: Waiting for PID=%d with waitid()\n", g_waitpids[0]);
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ret = waitid(P_PID, (id_t)g_waitpids[0], &info, WEXITED);
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if (ret < 0)
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{
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int errcode = errno;
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/* Unfortunately, this main thread does not retain child status. If
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* child status is enabled (via CONFIG_SCHED_CHILD_STATUS), ostest_main()
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* disables the feature by calling sigactin with SA_NOCLDWAIT.
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*/
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if (errcode == ECHILD)
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{
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printf("waitpid_test: PASS: PID %d waitpid failed with ECHILD. That may be\n",
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g_waitpids[NCHILDREN-1]);
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printf(" acceptable because child status is disabled on this thread.\n");
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}
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else
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{
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printf("waitpid_test: ERROR: PID %d waitid failed: %d\n",
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g_waitpids[0], errcode);
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}
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}
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else if (info.si_pid != g_waitpids[0])
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{
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printf("waitpid_test: ERROR: PID %d waitid returned PID %d\n",
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g_waitpids[0], info.si_pid);
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}
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else if (info.si_status != RETURN_STATUS)
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{
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printf("waitpid_test: ERROR: PID %d return status is %d, expected %d\n",
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info.si_pid, info.si_status, RETURN_STATUS);
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}
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else
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{
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printf("waitpid_test: waitid PID %d succeeded with si_status=%d\n",
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info.si_pid, info.si_status);
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}
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/* Wait a bit to make sure that the other threads complete */
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waitpid_last();
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sleep(1);
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/* Start the children and wait for any one to complete */
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printf("\nTest waitid(P_ALL)\n");
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waitpid_start_children();
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printf("waitpid_test: Waiting for any child with waitid()\n");
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ret = waitid(P_ALL, 0, &info, WEXITED);
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if (ret < 0)
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{
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int errcode = errno;
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/* Unfortunately, this main thread does not retain child status. If
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* child status is enabled (via CONFIG_SCHED_CHILD_STATUS), ostest_main()
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* disables the feature by calling sigactin with SA_NOCLDWAIT.
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*/
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if (errcode == ECHILD)
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{
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printf("waitpid_test: PASS: PID %d waitpid failed with ECHILD. That may be\n",
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g_waitpids[NCHILDREN-1]);
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printf(" acceptable because child status is disabled on this thread.\n");
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}
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else
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{
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printf("waitpid_test: ERROR: waitid failed: %d\n", errcode);
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}
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}
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else if (info.si_status != RETURN_STATUS)
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{
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printf("waitpid_test: ERROR: PID %d return status is %d, expected %d\n",
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info.si_pid, info.si_status, RETURN_STATUS);
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}
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else
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{
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printf("waitpid_test: PID %d waitid succeeded with si_status=%d\n",
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info.si_pid, info.si_status);
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}
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/* Wait a bit to make sure that the other threads complete */
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waitpid_last();
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sleep(1);
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/* Start the children and wait for first one to complete */
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printf("\nTest wait()\n");
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waitpid_start_children();
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printf("waitpid_test: Waiting for any child with wait()\n");
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ret = (int)wait(&stat_loc);
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if (ret < 0)
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{
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int errcode = errno;
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/* Unfortunately, this main thread does not retain child status. If
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* child status is enabled (via CONFIG_SCHED_CHILD_STATUS), ostest_main()
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* disables the feature by calling sigactin with SA_NOCLDWAIT.
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*/
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if (errcode == ECHILD)
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{
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printf("waitpid_test: PASS: PID %d waitpid failed with ECHILD. That may be\n",
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g_waitpids[NCHILDREN-1]);
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printf(" acceptable because child status is disabled on this thread.\n");
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}
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else
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{
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printf("waitpid_test: ERROR: wait failed: %d\n", errcode);
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}
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}
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else if (WEXITSTATUS(stat_loc) != RETURN_STATUS)
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{
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printf("waitpid_test: ERROR: PID %d return status is %d, expected %d\n",
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ret, WEXITSTATUS(stat_loc), RETURN_STATUS);
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}
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else
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{
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printf("waitpid_test: PID %d wait succeeded with stat_loc=%04x\n",
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ret, stat_loc);
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}
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/* Wait a bit to make sure that the other threads complete */
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waitpid_last();
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sleep(1);
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#endif
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return 0;
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}
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#endif /* CONFIG_SCHED_WAITPID */
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