| /* |
| * Copyright (c) 2004, Bull S.A.. All rights reserved. |
| * Created by: Sebastien Decugis |
| |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write the Free Software Foundation, Inc., 59 |
| * Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| |
| * This sample test aims to check the following assertion: |
| * |
| * For the SCHED_FIFO and SCHED_RR scheduling policies, |
| * the child process inherits the policy and priority |
| * settings of the parent process during a fork() function. |
| |
| * The steps are: |
| * -> Change the parent's scheduling policy and parameter |
| * -> fork |
| * -> check the child inherited the same policy. |
| |
| * The test fails if the child does not inherit the parent's values. |
| |
| */ |
| |
| /* We are testing conformance to IEEE Std 1003.1, 2003 Edition */ |
| #define _POSIX_C_SOURCE 200112L |
| |
| /********************************************************************************************/ |
| /****************************** standard includes *****************************************/ |
| /********************************************************************************************/ |
| #include <pthread.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include <sys/wait.h> |
| #include <errno.h> |
| |
| #include <sched.h> |
| |
| /********************************************************************************************/ |
| /****************************** Test framework *****************************************/ |
| /********************************************************************************************/ |
| #include "../testfrmw/testfrmw.h" |
| #include "../testfrmw/testfrmw.c" |
| /* This header is responsible for defining the following macros: |
| * UNRESOLVED(ret, descr); |
| * where descr is a description of the error and ret is an int (error code for example) |
| * FAILED(descr); |
| * where descr is a short text saying why the test has failed. |
| * PASSED(); |
| * No parameter. |
| * |
| * Both three macros shall terminate the calling process. |
| * The testcase shall not terminate in any other maneer. |
| * |
| * The other file defines the functions |
| * void output_init() |
| * void output(char * string, ...) |
| * |
| * Those may be used to output information. |
| */ |
| |
| /********************************************************************************************/ |
| /********************************** Configuration ******************************************/ |
| /********************************************************************************************/ |
| #ifndef VERBOSE |
| #define VERBOSE 1 |
| #endif |
| |
| #define POLICY SCHED_FIFO |
| |
| /********************************************************************************************/ |
| /*********************************** Test case *****************************************/ |
| /********************************************************************************************/ |
| /* The main test function. */ |
| int main(int argc, char * argv[]) |
| { |
| int ret, param, status; |
| pid_t child, ctl; |
| |
| struct sched_param sp; |
| |
| /* Initialize output */ |
| output_init(); |
| |
| /* Change process policy and parameters */ |
| sp.sched_priority = param = sched_get_priority_max(POLICY); |
| |
| if (sp.sched_priority == -1) |
| { |
| UNRESOLVED(errno, "Failed to get max priority value"); |
| } |
| |
| ret = sched_setscheduler(0, POLICY, &sp); |
| |
| if (ret == -1) |
| { |
| UNRESOLVED(errno, "Failed to change process scheduling policy"); |
| } |
| |
| /* Create the child */ |
| child = fork(); |
| |
| if (child == -1) |
| { |
| UNRESOLVED(errno, "Failed to fork"); |
| } |
| |
| /* child */ |
| if (child == 0) |
| { |
| |
| /* Check the scheduling policy */ |
| ret = sched_getscheduler(0); |
| |
| if (ret == -1) |
| { |
| UNRESOLVED(errno, "Failed to read scheduling policy in child"); |
| } |
| |
| if (ret != POLICY) |
| { |
| FAILED("The scheduling policy was not inherited"); |
| } |
| |
| ret = sched_getparam(0, &sp); |
| |
| if (ret != 0) |
| { |
| UNRESOLVED(errno, "Failed to read scheduling parameter in child"); |
| } |
| |
| if (sp.sched_priority != param) |
| { |
| FAILED("The scheduling parameter was not inherited"); |
| } |
| |
| /* We're done */ |
| exit(PTS_PASS); |
| } |
| |
| /* Parent joins the child */ |
| ctl = waitpid(child, &status, 0); |
| |
| if (ctl != child) |
| { |
| UNRESOLVED(errno, "Waitpid returned the wrong PID"); |
| } |
| |
| if (!WIFEXITED(status) || (WEXITSTATUS(status) != PTS_PASS)) |
| { |
| FAILED("Child exited abnormally"); |
| } |
| |
| /* Test passed */ |
| #if VERBOSE > 0 |
| output("Test passed\n"); |
| |
| #endif |
| PASSED; |
| } |