1f08c3bdfSopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later 2f08c3bdfSopenharmony_ci/* 3f08c3bdfSopenharmony_ci * Copyright (c) 2021, BELLSOFT. All rights reserved. 4f08c3bdfSopenharmony_ci * Copyright (c) International Business Machines Corp., 2001 5f08c3bdfSopenharmony_ci */ 6f08c3bdfSopenharmony_ci 7f08c3bdfSopenharmony_ci/*\ 8f08c3bdfSopenharmony_ci * [Description] 9f08c3bdfSopenharmony_ci * 10f08c3bdfSopenharmony_ci * Testcase to test whether sched_setscheduler(2) sets the errnos 11f08c3bdfSopenharmony_ci * correctly. 12f08c3bdfSopenharmony_ci * 13f08c3bdfSopenharmony_ci * [Algorithm] 14f08c3bdfSopenharmony_ci * 15f08c3bdfSopenharmony_ci * Call sched_setscheduler as a non-root uid, and expect EPERM 16f08c3bdfSopenharmony_ci * to be returned. 17f08c3bdfSopenharmony_ci * 18f08c3bdfSopenharmony_ci */ 19f08c3bdfSopenharmony_ci 20f08c3bdfSopenharmony_ci#include <stdlib.h> 21f08c3bdfSopenharmony_ci#include <errno.h> 22f08c3bdfSopenharmony_ci#include <pwd.h> 23f08c3bdfSopenharmony_ci#include <sys/types.h> 24f08c3bdfSopenharmony_ci 25f08c3bdfSopenharmony_ci#include "tst_test.h" 26f08c3bdfSopenharmony_ci#include "tst_sched.h" 27f08c3bdfSopenharmony_ci 28f08c3bdfSopenharmony_cistatic uid_t nobody_uid; 29f08c3bdfSopenharmony_ci 30f08c3bdfSopenharmony_cistatic void setup(void) 31f08c3bdfSopenharmony_ci{ 32f08c3bdfSopenharmony_ci struct passwd *pw = SAFE_GETPWNAM("nobody"); 33f08c3bdfSopenharmony_ci 34f08c3bdfSopenharmony_ci tst_res(TINFO, "Testing %s variant", sched_variants[tst_variant].desc); 35f08c3bdfSopenharmony_ci 36f08c3bdfSopenharmony_ci nobody_uid = pw->pw_uid; 37f08c3bdfSopenharmony_ci} 38f08c3bdfSopenharmony_ci 39f08c3bdfSopenharmony_cistatic void run(void) 40f08c3bdfSopenharmony_ci{ 41f08c3bdfSopenharmony_ci struct sched_variant *tv = &sched_variants[tst_variant]; 42f08c3bdfSopenharmony_ci pid_t pid = SAFE_FORK(); 43f08c3bdfSopenharmony_ci 44f08c3bdfSopenharmony_ci if (!pid) { 45f08c3bdfSopenharmony_ci struct sched_param p = { .sched_priority = 1 }; 46f08c3bdfSopenharmony_ci 47f08c3bdfSopenharmony_ci SAFE_SETEUID(nobody_uid); 48f08c3bdfSopenharmony_ci TST_EXP_FAIL(tv->sched_setscheduler(0, SCHED_FIFO, &p), EPERM, 49f08c3bdfSopenharmony_ci "sched_setscheduler(0, SCHED_FIFO, %d)", 50f08c3bdfSopenharmony_ci p.sched_priority); 51f08c3bdfSopenharmony_ci exit(0); 52f08c3bdfSopenharmony_ci } 53f08c3bdfSopenharmony_ci tst_reap_children(); 54f08c3bdfSopenharmony_ci} 55f08c3bdfSopenharmony_ci 56f08c3bdfSopenharmony_cistatic struct tst_test test = { 57f08c3bdfSopenharmony_ci .forks_child = 1, 58f08c3bdfSopenharmony_ci .needs_root = 1, 59f08c3bdfSopenharmony_ci .setup = setup, 60f08c3bdfSopenharmony_ci .test_variants = ARRAY_SIZE(sched_variants), 61f08c3bdfSopenharmony_ci .test_all = run, 62f08c3bdfSopenharmony_ci}; 63