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 sched_setparam() sets errno == ESRCH when no process can be found 12 * corresponding to that specified by pid. 13 */ 14 #include <sched.h> 15 #include <stdio.h> 16 #include <errno.h> 17 #include <unistd.h> 18 #include <stdlib.h> 19 #include <sys/wait.h> 20 #include "posixtest.h" 21 22 int main(void) 23 { 24 struct sched_param param; 25 int child_pid, stat_loc, old_priority; 26 27 if (sched_getparam(0, ¶m) == -1) { 28 perror("An error occurs when calling sched_getparam()"); 29 return PTS_UNRESOLVED; 30 } 31 old_priority = param.sched_priority; 32 33 /* Create a child process which exit immediately */ 34 child_pid = fork(); 35 if (child_pid == -1) { 36 perror("An error occurs when calling fork()"); 37 return PTS_UNRESOLVED; 38 } else if (child_pid == 0) { 39 exit(0); 40 } 41 42 /* Wait for the child process to exit */ 43 if (wait(&stat_loc) == -1) { 44 perror("An error occurs when calling wait()"); 45 return PTS_UNRESOLVED; 46 } 47 48 /* Assume the pid is not yet reatributed to an other process */ 49 param.sched_priority++; 50 sched_setparam(child_pid, ¶m); 51 52 if (sched_getparam(0, ¶m) != 0) { 53 perror("An error occurs when calling sched_getparam()"); 54 return PTS_UNRESOLVED; 55 } 56 57 if (param.sched_priority == old_priority) { 58 printf("Test PASSED\n"); 59 return PTS_PASS; 60 } else { 61 printf("The priority have changed.\n"); 62 return PTS_FAIL; 63 } 64 } 65
