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_getscheduler() sets errno == EPERM when the requesting 12 * process does not have permission 13 */ 14#define _XOPEN_SOURCE 600 15#include <stdio.h> 16#include <sched.h> 17#include <errno.h> 18#include <unistd.h> 19#include <sys/types.h> 20#include <pwd.h> 21#include <string.h> 22#include "posixtest.h" 23 24/** Set the euid of this process to a non-root uid */ 25int set_nonroot() 26{ 27 struct passwd *pw; 28 setpwent(); 29 /* search for the first user which is non root */ 30 while((pw = getpwent()) != NULL) 31 if(strcmp(pw->pw_name, "root")) 32 break; 33 endpwent(); 34 if(pw == NULL) { 35 printf("There is no other user than current and root.\n"); 36 return 1; 37 } 38 39 if(seteuid(pw->pw_uid) != 0) { 40 if(errno == EPERM) { 41 printf("You don't have permission to change your UID.\n"); 42 return 1; 43 } 44 perror("An error occurs when calling seteuid()"); 45 return 1; 46 } 47 48 printf("Testing with user '%s' (uid: %d)\n", 49 pw->pw_name, (int)geteuid()); 50 return 0; 51} 52 53int main(int argc, char **argv) 54{ 55 56 int result = -1; 57 58 /* We assume process Number 1 is created by root */ 59 /* and can only be accessed by root */ 60 /* This test should be run under standard user permissions */ 61 if (getuid() == 0) { 62 if (set_nonroot() != 0) { 63 printf("Cannot run this test as non-root user\n"); 64 return PTS_UNTESTED; 65 } 66 } 67 68 result = sched_getscheduler( 1 ); 69 70 if(result == -1 && errno == EPERM) { 71 printf("Test PASSED\n"); 72 return PTS_PASS; 73 } 74 if(result == 0) { 75 printf("The function sched_getscheduler has successed.\n"); 76 return PTS_FAIL; 77 } 78 if(errno != EPERM ) { 79 perror("errno is not EPERM"); 80 return PTS_FAIL; 81 } else { 82 perror("Unresolved test error"); 83 return PTS_UNRESOLVED; 84 } 85} 86 87 88