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 * policy value is not defined in the sched.h header. 13 * 14 * The test attempt to set the policy to a very improbable value. 15 * Steps: 16 * 1. Get the old policy and priority. 17 * 2. Call sched_setscheduler with invalid args. 18 * 3. Check that the policy and priority have not changed. 19 * 20 * Orignal author unknown 21 * Updated: Peter W. Morreale <pmorreale AT novell DOT com> 22 * Date: 09.07.2011 23 */ 24 25 #include <sched.h> 26 #include <stdio.h> 27 #include <limits.h> 28 #include <errno.h> 29 #include <string.h> 30 #include <unistd.h> 31 #include "posixtest.h" 32 33 #define ERR_MSG(f, rc) printf("Failed: %s rc: %d errno: %s\n", \ 34 f, rc, strerror(errno)) 35 36 int main(void) 37 { 38 int old_priority, old_policy, new_policy; 39 struct sched_param param; 40 int invalid_policy; 41 char *label; 42 pid_t pid = getpid(); 43 int rc; 44 45 invalid_policy = INT_MAX; 46 47 label = "sched_getparam()"; 48 rc = sched_getparam(pid, ¶m); 49 if (rc) 50 goto unresolved; 51 old_priority = param.sched_priority; 52 53 label = "sched_getscheduler()"; 54 rc = sched_getscheduler(pid); 55 if (rc < 0) 56 goto unresolved; 57 old_policy = rc; 58 59 label = "sched_setscheduler() - invalid policy succeeded?"; 60 rc = sched_setscheduler(0, invalid_policy, ¶m); 61 if (!rc) 62 goto unresolved; 63 64 label = "sched_getparam()"; 65 rc = sched_getparam(pid, ¶m); 66 if (rc) 67 goto unresolved; 68 69 label = "sched_getscheduler()"; 70 rc = sched_getscheduler(pid); 71 if (rc < 0) 72 goto unresolved; 73 new_policy = rc; 74 75 if (old_policy != new_policy) { 76 printf("Failed: invalid policy change, old: %u, new %u\n", 77 old_policy, new_policy); 78 return PTS_FAIL; 79 } 80 81 if (old_priority != param.sched_priority) { 82 printf("Failed: invalid priority change, old: %u, new %u\n", 83 old_priority, param.sched_priority); 84 return PTS_FAIL; 85 } 86 87 printf("Test PASSED\n"); 88 return PTS_PASS; 89 90 unresolved: 91 ERR_MSG(label, rc); 92 return PTS_UNRESOLVED; 93 } 94
