1f08c3bdfSopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later 2f08c3bdfSopenharmony_ci/* 3f08c3bdfSopenharmony_ci * Copyright (c) International Business Machines Corp., 2001 4f08c3bdfSopenharmony_ci * 07/2001 Ported by Wayne Boyer 5f08c3bdfSopenharmony_ci * Copyright (c) 2023 SUSE LLC Avinesh Kumar <avinesh.kumar@suse.com> 6f08c3bdfSopenharmony_ci */ 7f08c3bdfSopenharmony_ci 8f08c3bdfSopenharmony_ci/*\ 9f08c3bdfSopenharmony_ci * [Description] 10f08c3bdfSopenharmony_ci * 11f08c3bdfSopenharmony_ci * Verify that, mmap() call with PROT_READ and a file descriptor which is 12f08c3bdfSopenharmony_ci * open for read only, succeeds to map a file creating mapped memory with 13f08c3bdfSopenharmony_ci * read access. 14f08c3bdfSopenharmony_ci */ 15f08c3bdfSopenharmony_ci 16f08c3bdfSopenharmony_ci#include <stdlib.h> 17f08c3bdfSopenharmony_ci#include "tst_test.h" 18f08c3bdfSopenharmony_ci 19f08c3bdfSopenharmony_ci#define TEMPFILE "mmapfile" 20f08c3bdfSopenharmony_cistatic ssize_t page_sz; 21f08c3bdfSopenharmony_cistatic int fd; 22f08c3bdfSopenharmony_cistatic char *addr; 23f08c3bdfSopenharmony_cistatic char *buf; 24f08c3bdfSopenharmony_ci 25f08c3bdfSopenharmony_cistatic void setup(void) 26f08c3bdfSopenharmony_ci{ 27f08c3bdfSopenharmony_ci page_sz = getpagesize(); 28f08c3bdfSopenharmony_ci buf = SAFE_MALLOC(page_sz); 29f08c3bdfSopenharmony_ci memset(buf, 'A', page_sz); 30f08c3bdfSopenharmony_ci 31f08c3bdfSopenharmony_ci fd = SAFE_OPEN(TEMPFILE, O_RDWR | O_CREAT, 0666); 32f08c3bdfSopenharmony_ci SAFE_WRITE(SAFE_WRITE_ALL, fd, buf, page_sz); 33f08c3bdfSopenharmony_ci 34f08c3bdfSopenharmony_ci SAFE_FCHMOD(fd, 0444); 35f08c3bdfSopenharmony_ci SAFE_CLOSE(fd); 36f08c3bdfSopenharmony_ci fd = SAFE_OPEN(TEMPFILE, O_RDONLY); 37f08c3bdfSopenharmony_ci} 38f08c3bdfSopenharmony_ci 39f08c3bdfSopenharmony_cistatic void run(void) 40f08c3bdfSopenharmony_ci{ 41f08c3bdfSopenharmony_ci addr = SAFE_MMAP(NULL, page_sz, PROT_READ, MAP_FILE | MAP_SHARED, fd, 0); 42f08c3bdfSopenharmony_ci 43f08c3bdfSopenharmony_ci if (memcmp(buf, addr, page_sz) == 0) 44f08c3bdfSopenharmony_ci tst_res(TPASS, "mmap() functionality successful"); 45f08c3bdfSopenharmony_ci else 46f08c3bdfSopenharmony_ci tst_res(TFAIL, "mapped memory area contains invalid data"); 47f08c3bdfSopenharmony_ci 48f08c3bdfSopenharmony_ci SAFE_MUNMAP(addr, page_sz); 49f08c3bdfSopenharmony_ci} 50f08c3bdfSopenharmony_ci 51f08c3bdfSopenharmony_cistatic void cleanup(void) 52f08c3bdfSopenharmony_ci{ 53f08c3bdfSopenharmony_ci if (fd > 0) 54f08c3bdfSopenharmony_ci SAFE_CLOSE(fd); 55f08c3bdfSopenharmony_ci 56f08c3bdfSopenharmony_ci free(buf); 57f08c3bdfSopenharmony_ci} 58f08c3bdfSopenharmony_ci 59f08c3bdfSopenharmony_cistatic struct tst_test test = { 60f08c3bdfSopenharmony_ci .setup = setup, 61f08c3bdfSopenharmony_ci .cleanup = cleanup, 62f08c3bdfSopenharmony_ci .test_all = run, 63f08c3bdfSopenharmony_ci .needs_tmpdir = 1 64f08c3bdfSopenharmony_ci}; 65