1/* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License version 2. 4 * 5 * This program is distributed in the hope that it will be useful, 6 * but WITHOUT ANY WARRANTY; without even the implied warranty of 7 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 8 * GNU General Public License for more details. 9 * 10 * 11 * Test that the scheduling policy and scheduling parameters are set for 12 * the calling process when pid == 0. 13 */ 14#include <sched.h> 15#include <stdio.h> 16#include <errno.h> 17#include <unistd.h> 18#include "posixtest.h" 19 20int main(){ 21 int result, new_priority, old_priority, max_prio; 22 int old_policy, new_policy, test_policy; 23 struct sched_param param; 24 25 if(sched_getparam(getpid(), ¶m) != 0) { 26 perror("An error occurs when calling sched_getparam()"); 27 return PTS_UNRESOLVED; 28 } 29 30 old_policy = sched_getscheduler(getpid()); 31 if(old_policy == -1) { 32 perror("An error occurs when calling sched_getscheduler()"); 33 return PTS_UNRESOLVED; 34 } 35 36 /* Make sure new_policy != old_policy */ 37 new_policy = (old_policy == SCHED_FIFO) ? SCHED_RR : SCHED_FIFO; 38 39 /* Make sure new_priority != old_priority */ 40 max_prio = sched_get_priority_max(new_policy); 41 old_priority = param.sched_priority; 42 new_priority = (old_priority == max_prio) ? 43 (param.sched_priority = sched_get_priority_min(new_policy)) : 44 (param.sched_priority = max_prio); 45 46 result = sched_setscheduler(0, new_policy, ¶m); 47 48 if(sched_getparam(getpid(), ¶m) != 0){ 49 perror("An error occurs when calling sched_getparam()"); 50 return PTS_UNRESOLVED; 51 } 52 53 test_policy = sched_getscheduler(getpid()); 54 if(test_policy == -1) { 55 perror("An error occurs when calling sched_getscheduler()"); 56 return PTS_UNRESOLVED; 57 } 58 59 if(result != -1 && param.sched_priority == new_priority && 60 test_policy == new_policy) { 61 printf("Test PASSED\n"); 62 return PTS_PASS; 63 } else if(result != -1 && 64 (param.sched_priority == old_priority || 65 test_policy == old_policy)) { 66 if(param.sched_priority == old_priority) { 67 printf("The param does not change\n"); 68 } 69 if(test_policy == old_policy) { 70 printf("The policy does not change\n"); 71 } 72 return PTS_FAIL; 73 } else if(result == -1 && errno == EPERM) { 74 printf("The process have not permission to change its own policy.\nTry to launch this test as root.\n"); 75 return PTS_UNRESOLVED; 76 } 77 78 perror("Unknow error"); 79 return PTS_FAIL; 80} 81