| /* |
| * 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() to map a file creating a mapped region with read access |
| * under the following conditions - |
| * - The prot parameter is set to PROT_WRITE |
| * - The file descriptor is open for writing. |
| * - The flags parameter has MAP_PRIVATE set. |
| * |
| * The call should fail to map the file. |
| * |
| * Expected Result: |
| * mmap() should fail returning -1 and errno should get set to EACCES. |
| * |
| * 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 = "mmap07"; |
| int TST_TOTAL = 1; |
| |
| static int exp_enos[] = { EACCES, 0 }; |
| |
| static size_t page_sz; |
| static char *addr; |
| 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(); |
| |
| TEST_EXP_ENOS(exp_enos); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| |
| tst_count = 0; |
| |
| /* |
| * Call mmap to map the temporary file 'TEMPFILE' |
| * with write access. |
| */ |
| errno = 0; |
| addr = mmap(0, page_sz, PROT_WRITE, |
| MAP_FILE | MAP_PRIVATE, fildes, 0); |
| TEST_ERRNO = errno; |
| |
| /* Check for the return value of mmap() */ |
| if (addr != MAP_FAILED) { |
| tst_resm(TFAIL | TERRNO, |
| "mmap() returned invalid value, expected: %p", |
| MAP_FAILED); |
| /* Unmap the mapped memory */ |
| if (munmap(addr, page_sz) != 0) { |
| tst_resm(TBROK, "munmap() failed"); |
| cleanup(); |
| } |
| continue; |
| } |
| TEST_ERROR_LOG(TEST_ERRNO); |
| if (TEST_ERRNO == EACCES) { |
| tst_resm(TPASS, "mmap failed with EACCES"); |
| } else { |
| tst_resm(TFAIL | TERRNO, |
| "mmap failed with unexpected errno"); |
| } |
| |
| } |
| cleanup(); |
| tst_exit(); |
| |
| } |
| |
| static void setup(void) |
| { |
| char *tst_buff; |
| |
| tst_sig(NOFORK, 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 to allocate space for 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_WRONLY | O_CREAT, 0666)) < 0) { |
| free(tst_buff); |
| tst_brkm(TFAIL, cleanup, "open() on %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, cleanup, "writing to %s failed", TEMPFILE); |
| } |
| |
| free(tst_buff); |
| } |
| |
| static void cleanup(void) |
| { |
| close(fildes); |
| TEST_CLEANUP; |
| tst_rmdir(); |
| } |