| /* |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * |
| * Test that sched_setscheduler() sets errno == EPERM when the requesting |
| * process does not have permission to set the scheduling parameters for the |
| * specified process, or does not have the appropriate privilege to invoke |
| * sched_setscheduler(). |
| * |
| * Atempt to change the policy of the process whose ID is 1 which is generally |
| * belongs to root. This test can not be run by root. |
| */ |
| |
| #define _XOPEN_SOURCE 600 |
| #include <stdio.h> |
| #include <sched.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <pwd.h> |
| #include <string.h> |
| #include "posixtest.h" |
| |
| /** Set the euid of this process to a non-root uid */ |
| int set_nonroot() |
| { |
| struct passwd *pw; |
| setpwent(); |
| /* search for the first user which is non root */ |
| while ((pw = getpwent()) != NULL) |
| if (strcmp(pw->pw_name, "root")) |
| break; |
| endpwent(); |
| if (pw == NULL) { |
| printf("There is no other user than current and root.\n"); |
| return 1; |
| } |
| |
| if (setuid(pw->pw_uid) != 0) { |
| if (errno == EPERM) { |
| printf("You don't have permission to change your UID.\n"); |
| return 1; |
| } |
| perror("An error occurs when calling seteuid()"); |
| return 1; |
| } |
| |
| printf("Testing with user '%s' (euid: %d)(uid: %d)\n", |
| pw->pw_name, (int)geteuid(), (int)getuid()); |
| return 0; |
| } |
| |
| int main() { |
| int result; |
| struct sched_param param; |
| |
| /* We assume process Number 1 is created by root */ |
| /* and can only be accessed by root */ |
| /* This test should be run under standard user permissions */ |
| if (getuid() == 0) { |
| if (set_nonroot() != 0) { |
| printf("Cannot run this test as non-root user\n"); |
| return PTS_UNTESTED; |
| } |
| } |
| |
| param.sched_priority = sched_get_priority_max(SCHED_FIFO); |
| |
| result = sched_setscheduler(1, SCHED_FIFO, ¶m); |
| |
| if (result == -1 && errno == EPERM) { |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } else if (errno != EPERM) { |
| perror("errno is not EPERM"); |
| return PTS_FAIL; |
| } else { |
| printf("The returned code is not -1.\n"); |
| return PTS_FAIL; |
| } |
| } |