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 policy and scheduling parameters remain unchanged when the 12 * sched_priority member is not within the inclusive priority range for the 13 * scheduling policy. 14 * 15 * Test is done for all policy defined in the spec into a loop. 16 * Steps (into loop): 17 * 1. Get the old policy and priority. 18 * 2. Call sched_setscheduler with invalid args. 19 * 3. Check that the policy and priority have not changed. 20 */ 21 22 #include <errno.h> 23 #include <sched.h> 24 #include <stdio.h> 25 #include <unistd.h> 26 #include "posixtest.h" 27 28 struct unique { 29 int value; 30 char *name; 31 } sym[] = { 32 33 { 34 SCHED_FIFO, "SCHED_FIFO"}, { 35 SCHED_RR, "SCHED_RR"}, 36 #if defined(_POSIX_SPORADIC_SERVER)&&(_POSIX_SPORADIC_SERVER != -1) || defined(_POSIX_THREAD_SPORADIC_SERVER)&&(_POSIX_THREAD_SPORADIC_SERVER != -1) 37 { 38 SCHED_SPORADIC, "SCHED_SPORADIC"}, 39 #endif 40 { 41 SCHED_OTHER, "SCHED_OTHER"}, { 42 0, 0} 43 }; 44 45 int main(void) 46 { 47 int policy, invalid_priority, result = PTS_PASS; 48 int old_priority, old_policy, new_policy; 49 struct sched_param param; 50 51 struct unique *tst; 52 53 tst = sym; 54 while (tst->name) { 55 policy = tst->value; 56 fflush(stderr); 57 printf("Policy: %s\n", tst->name); 58 fflush(stdout); 59 60 if (sched_getparam(getpid(), ¶m) != 0) { 61 perror("An error occurs when calling sched_getparam()"); 62 return PTS_UNRESOLVED; 63 } 64 old_priority = param.sched_priority; 65 66 old_policy = sched_getscheduler(getpid()); 67 if (old_policy == -1) { 68 perror 69 ("An error occurs when calling sched_getscheduler()"); 70 return PTS_UNRESOLVED; 71 } 72 73 invalid_priority = sched_get_priority_max(policy); 74 if (invalid_priority == -1) { 75 perror 76 ("An error occurs when calling sched_get_priority_max()"); 77 return PTS_UNRESOLVED; 78 } 79 80 /* set an invalid priority */ 81 invalid_priority++; 82 param.sched_priority = invalid_priority; 83 84 sched_setscheduler(0, policy, ¶m); 85 86 if (sched_getparam(getpid(), ¶m) != 0) { 87 perror("An error occurs when calling sched_getparam()"); 88 return PTS_UNRESOLVED; 89 } 90 91 new_policy = sched_getscheduler(getpid()); 92 if (new_policy == -1) { 93 perror 94 ("An error occurs when calling sched_getscheduler()"); 95 return PTS_UNRESOLVED; 96 } 97 98 if (old_policy == new_policy && 99 old_priority == param.sched_priority) { 100 printf(" OK\n"); 101 } else { 102 if (param.sched_priority != old_priority) { 103 printf(" The param has changed\n"); 104 } 105 if (new_policy != old_policy) { 106 printf(" The policy has changed\n"); 107 } 108 result = PTS_FAIL; 109 } 110 111 tst++; 112 } 113 114 if (result == PTS_PASS) { 115 printf("Test PASSED\n"); 116 } 117 return result; 118 } 119