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 20 int main(void) 21 { 22 int result, new_priority, old_priority, max_prio; 23 int old_policy, new_policy, test_policy; 24 struct sched_param param; 25 26 if (sched_getparam(getpid(), ¶m) != 0) { 27 perror("An error occurs when calling sched_getparam()"); 28 return PTS_UNRESOLVED; 29 } 30 31 old_policy = sched_getscheduler(getpid()); 32 if (old_policy == -1) { 33 perror("An error occurs when calling sched_getscheduler()"); 34 return PTS_UNRESOLVED; 35 } 36 37 /* Make sure new_policy != old_policy */ 38 new_policy = (old_policy == SCHED_FIFO) ? SCHED_RR : SCHED_FIFO; 39 40 /* Make sure new_priority != old_priority */ 41 max_prio = sched_get_priority_max(new_policy); 42 old_priority = param.sched_priority; 43 new_priority = (old_priority == max_prio) ? 44 (param.sched_priority = sched_get_priority_min(new_policy)) : 45 (param.sched_priority = max_prio); 46 47 result = sched_setscheduler(0, new_policy, ¶m); 48 49 if (sched_getparam(getpid(), ¶m) != 0) { 50 perror("An error occurs when calling sched_getparam()"); 51 return PTS_UNRESOLVED; 52 } 53 54 test_policy = sched_getscheduler(getpid()); 55 if (test_policy == -1) { 56 perror("An error occurs when calling sched_getscheduler()"); 57 return PTS_UNRESOLVED; 58 } 59 60 if (result != -1 && param.sched_priority == new_priority && 61 test_policy == new_policy) { 62 printf("Test PASSED\n"); 63 return PTS_PASS; 64 } else if (result != -1 && 65 (param.sched_priority == old_priority || 66 test_policy == old_policy)) { 67 if (param.sched_priority == old_priority) { 68 printf("The param does not change\n"); 69 } 70 if (test_policy == old_policy) { 71 printf("The policy does not change\n"); 72 } 73 return PTS_FAIL; 74 } else if (result == -1 && errno == EPERM) { 75 printf 76 ("The process have not permission to change its own policy.\nTry to launch this test as root.\n"); 77 return PTS_UNRESOLVED; 78 } 79 80 perror("Unknow error"); 81 return PTS_FAIL; 82 } 83
