| /* |
| * Copyright (c) International Business Machines Corp., 2001 |
| * |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * Test Description: |
| * Call mmap() with prot parameter set to PROT_READ and with the file |
| * descriptor being open for read, to map a file creating mapped memory |
| * with read access. The minimum file permissions should be 0444. |
| * |
| * The call should succeed to create the mapped region with required |
| * attributes. |
| * |
| * Expected Result: |
| * mmap() should succeed returning the address of the mapped region, |
| * the mapped region should contain the contents of the mapped file. |
| * |
| * HISTORY |
| * 07/2001 Ported by Wayne Boyer |
| */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <string.h> |
| #include <signal.h> |
| #include <sys/stat.h> |
| #include <sys/mman.h> |
| |
| #include "test.h" |
| #include "usctest.h" |
| |
| #define TEMPFILE "mmapfile" |
| |
| char *TCID = "mmap02"; |
| int TST_TOTAL = 1; |
| |
| static char *addr; |
| static char *dummy; |
| static size_t page_sz; |
| static int fildes; |
| |
| static void setup(void); |
| static void cleanup(void); |
| |
| int main(int ac, char **av) |
| { |
| int lc; |
| char *msg; |
| |
| if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| |
| tst_count = 0; |
| |
| /* |
| * Call mmap to map the temporary file 'TEMPFILE' |
| * with read access. |
| */ |
| errno = 0; |
| addr = mmap(0, page_sz, PROT_READ, |
| MAP_FILE | MAP_SHARED, fildes, 0); |
| |
| /* Check for the return value of mmap() */ |
| if (addr == MAP_FAILED) { |
| tst_resm(TFAIL | TERRNO, "mmap of %s failed", TEMPFILE); |
| continue; |
| } |
| |
| if (STD_FUNCTIONAL_TEST) { |
| /* |
| * Read the file contents into the dummy |
| * string. |
| */ |
| if (read(fildes, dummy, page_sz) < 0) { |
| tst_brkm(TFAIL | TERRNO, cleanup, |
| "reading %s failed", TEMPFILE); |
| } |
| |
| /* |
| * Check whether mapped memory region has |
| * the file contents. |
| */ |
| if (memcmp(dummy, addr, page_sz)) { |
| tst_resm(TFAIL, "mapped memory area contains " |
| "invalid data"); |
| } else { |
| tst_resm(TPASS, |
| "Functionality of mmap() successful"); |
| } |
| } else { |
| tst_resm(TPASS, "call succeeded"); |
| } |
| |
| /* Clean up things in case we are looping */ |
| /* Unmap the mapped memory */ |
| if (munmap(addr, page_sz) != 0) { |
| tst_brkm(TFAIL | TERRNO, cleanup, "munmapping failed"); |
| } |
| |
| } |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| static void setup(void) |
| { |
| char *tst_buff; |
| |
| tst_sig(FORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| |
| /* Get the system page size */ |
| if ((page_sz = getpagesize()) < 0) { |
| tst_brkm(TFAIL, NULL, |
| "getpagesize() fails to get system page size"); |
| } |
| |
| /* Allocate space for the test buffer */ |
| if ((tst_buff = calloc(page_sz, sizeof(char))) == NULL) { |
| tst_brkm(TFAIL, NULL, "calloc failed (tst_buff)"); |
| } |
| |
| /* Fill the test buffer with the known data */ |
| memset(tst_buff, 'A', page_sz); |
| |
| tst_tmpdir(); |
| |
| /* Creat a temporary file used for mapping */ |
| if ((fildes = open(TEMPFILE, O_RDWR | O_CREAT, 0666)) < 0) { |
| free(tst_buff); |
| tst_brkm(TFAIL | TERRNO, cleanup, "opening %s failed", |
| TEMPFILE); |
| } |
| |
| /* Write test buffer contents into temporary file */ |
| if (write(fildes, tst_buff, page_sz) < page_sz) { |
| free(tst_buff); |
| tst_brkm(TFAIL | TERRNO, cleanup, |
| "writing to %s failed", TEMPFILE); |
| cleanup(); |
| } |
| |
| /* Free the memory allocated for test buffer */ |
| free(tst_buff); |
| |
| /* Change Mode permissions on Temporary file */ |
| if (fchmod(fildes, 0444) < 0) { |
| tst_brkm(TFAIL | TERRNO, cleanup, "fchmod(%s, 0444) failed", |
| TEMPFILE); |
| } |
| |
| /* Close the temporary file */ |
| if (close(fildes) < 0) { |
| tst_brkm(TFAIL | TERRNO, cleanup, "closing %s failed", |
| TEMPFILE); |
| } |
| |
| /* Open the temporary file again, - Readonly mode */ |
| if ((fildes = open(TEMPFILE, O_RDONLY)) < 0) { |
| tst_brkm(TFAIL, cleanup, "reopening %s readonly failed", |
| TEMPFILE); |
| } |
| |
| /* Allocate and initialize dummy string of system page size bytes */ |
| if ((dummy = calloc(page_sz, sizeof(char))) == NULL) { |
| tst_brkm(TFAIL, cleanup, "calloc failed (dummy)"); |
| } |
| |
| } |
| |
| static void cleanup(void) |
| { |
| close(fildes); |
| TEST_CLEANUP; |
| free(dummy); |
| tst_rmdir(); |
| } |