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 23 24int main(){ 25 struct sched_param param; 26 int child_pid, stat_loc, old_priority; 27 28 if(sched_getparam(0, ¶m) == -1) { 29 perror("An error occurs when calling sched_getparam()"); 30 return PTS_UNRESOLVED; 31 } 32 old_priority = param.sched_priority; 33 34 /* Create a child process which exit immediately */ 35 child_pid = fork(); 36 if(child_pid == -1){ 37 perror("An error occurs when calling fork()"); 38 return PTS_UNRESOLVED; 39 } else if (child_pid == 0){ 40 exit(0); 41 } 42 43 /* Wait for the child process to exit */ 44 if(wait(&stat_loc) == -1){ 45 perror("An error occurs when calling wait()"); 46 return PTS_UNRESOLVED; 47 } 48 49 /* Assume the pid is not yet reatributed to an other process */ 50 param.sched_priority++; 51 sched_setparam(child_pid, ¶m); 52 53 if(sched_getparam(0, ¶m) != 0){ 54 perror("An error occurs when calling sched_getparam()"); 55 return PTS_UNRESOLVED; 56 } 57 58 if(param.sched_priority == old_priority){ 59 printf("Test PASSED\n"); 60 return PTS_PASS; 61 } else { 62 printf("The priority have changed.\n"); 63 return PTS_FAIL; 64 } 65} 66