/* * Copyright (c) International Business Machines Corp., 2004 * Copyright (c) Linux Test Project, 2004-2017 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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. */ /* * DESCRIPTION * hugeshmget05 - test for EACCES error * * HISTORY * 03/2001 - Written by Wayne Boyer * 04/2004 - Updated by Robbie Williamson */ #include <sys/types.h> #include <sys/wait.h> #include <limits.h> #include "hugetlb.h" #include "hugetlb.h" static size_t shm_size; static int shm_id_1 = -1; static uid_t ltp_uid; static char *ltp_user = "nobody"; static long hugepages = 128; static struct tst_option options[] = { {"s:", &nr_opt, "-s num Set the number of the been allocated hugepages"}, {NULL, NULL, NULL} }; static void do_child(void); static void test_hugeshmget(void) { pid_t pid; int status; switch (pid = fork()) { case -1: tst_brk(TBROK | TERRNO, "fork"); case 0: /* set the user ID of the child to the non root user */ SAFE_SETUID(ltp_uid); do_child(); exit(0); default: /* wait for the child to return */ SAFE_WAITPID(pid, &status, 0); } } static void do_child(void) { TEST(shmget(shmkey, shm_size, SHM_HUGETLB | SHM_RW)); if (TST_RET != -1) { tst_res(TFAIL, "shmget succeeded unexpectedly"); return; } if (TST_ERR == EACCES) tst_res(TPASS | TTERRNO, "shmget failed as expected"); else tst_res(TFAIL | TTERRNO, "shmget failed unexpectedly " "- expect errno=EACCES, got"); } void setup(void) { long hpage_size; save_nr_hugepages(); if (nr_opt) hugepages = SAFE_STRTOL(nr_opt, 0, LONG_MAX); set_sys_tune("nr_hugepages", hugepages, 1); hpage_size = SAFE_READ_MEMINFO("Hugepagesize:") * 1024; shm_size = hpage_size * hugepages / 2; update_shm_size(&shm_size); shmkey = getipckey(); shm_id_1 = shmget(shmkey, shm_size, SHM_HUGETLB | SHM_RW | IPC_CREAT | IPC_EXCL); if (shm_id_1 == -1) tst_brk(TBROK | TERRNO, "shmget #setup"); /* get the userid for a non-root user */ ltp_uid = getuserid(ltp_user); } void cleanup(void) { rm_shm(shm_id_1); restore_nr_hugepages(); } static struct tst_test test = { .needs_root = 1, .options = options, .setup = setup, .cleanup = cleanup, .test_all = test_hugeshmget, };