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 * The test create a child process which exit immediately and call 15 * sched_setparam with the pid of defunct child. 16 */ 17 #include <sched.h> 18 #include <stdio.h> 19 #include <errno.h> 20 #include <unistd.h> 21 #include <stdlib.h> 22 #include <sys/wait.h> 23 #include "posixtest.h" 24 25 int main(void) 26 { 27 struct sched_param param; 28 int result, child_pid, stat_loc; 29 30 if (sched_getparam(0, ¶m) == -1) { 31 perror("An error occurs when calling sched_getparam()"); 32 return PTS_UNRESOLVED; 33 } 34 35 /* Create a child process which exit immediately */ 36 child_pid = fork(); 37 if (child_pid == -1) { 38 perror("An error occurs when calling fork()"); 39 return PTS_UNRESOLVED; 40 } else if (child_pid == 0) { 41 exit(0); 42 } 43 44 /* Wait for the child process to exit */ 45 if (wait(&stat_loc) == -1) { 46 perror("An error occurs when calling wait()"); 47 return PTS_UNRESOLVED; 48 } 49 50 /* Assume the pid is not yet reatributed to an other process */ 51 result = sched_setparam(child_pid, ¶m); 52 53 if (result == -1 && errno == ESRCH) { 54 printf("Test PASSED\n"); 55 return PTS_PASS; 56 } else if (result != -1) { 57 printf("The returned code is not -1.\n"); 58 return PTS_FAIL; 59 } else if (errno == EPERM) { 60 printf 61 ("This process does not have the permission to invoke sched_setparam().\nTry to launch this test as root\n"); 62 return PTS_UNRESOLVED; 63 } else { 64 perror("errno is not ESRCH"); 65 return PTS_FAIL; 66 } 67 } 68
