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syscalls/mmap02: Rewrite the test using new LTP API
Signed-off-by: Avinesh Kumar <[email protected]>
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| // SPDX-License-Identifier: GPL-2.0-or-later | ||
| /* | ||
| * 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 | ||
| * 07/2001 Ported by Wayne Boyer | ||
| * Copyright (c) 2023 SUSE LLC Avinesh Kumar <[email protected]> | ||
| */ | ||
|
|
||
| /* | ||
| * 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. | ||
| /*\ | ||
| * [Description] | ||
| * | ||
| * 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 | ||
| * Verify that, mmap() call with PROT_READ and a file descriptor which is | ||
| * open for read only, succeeds to map a file creating mapped memory with | ||
| * read access. | ||
| */ | ||
| #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" | ||
|
|
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| #define TEMPFILE "mmapfile" | ||
|
|
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| char *TCID = "mmap02"; | ||
| int TST_TOTAL = 1; | ||
| #include <stdlib.h> | ||
| #include "tst_test.h" | ||
|
|
||
| #define TEMPFILE "mmapfile" | ||
| static ssize_t page_sz; | ||
| static int fd; | ||
| 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; | ||
|
|
||
| tst_parse_opts(ac, av, NULL, NULL); | ||
|
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| setup(); | ||
|
|
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| for (lc = 0; TEST_LOOPING(lc); lc++) { | ||
|
|
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| 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; | ||
| } | ||
|
|
||
| /* | ||
| * 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"); | ||
| } | ||
|
|
||
| /* 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 char *buf; | ||
|
|
||
| static void setup(void) | ||
| { | ||
| char *tst_buff; | ||
|
|
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| tst_sig(FORK, DEF_HANDLER, cleanup); | ||
|
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| TEST_PAUSE; | ||
|
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| page_sz = getpagesize(); | ||
| buf = SAFE_MALLOC(page_sz); | ||
| memset(buf, 'A', page_sz); | ||
|
|
||
| /* 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); | ||
| fd = SAFE_OPEN(TEMPFILE, O_RDWR | O_CREAT, 0666); | ||
| SAFE_WRITE(SAFE_WRITE_ALL, fd, buf, page_sz); | ||
|
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| tst_tmpdir(); | ||
|
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| /* 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) < (int)page_sz) { | ||
| free(tst_buff); | ||
| tst_brkm(TFAIL | TERRNO, cleanup, | ||
| "writing to %s failed", TEMPFILE); | ||
| } | ||
|
|
||
| /* Free the memory allocated for test buffer */ | ||
| free(tst_buff); | ||
|
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| /* 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); | ||
| } | ||
| SAFE_FCHMOD(fd, 0444); | ||
| SAFE_CLOSE(fd); | ||
| fd = SAFE_OPEN(TEMPFILE, O_RDONLY); | ||
| } | ||
|
|
||
| /* Open the temporary file again, - Readonly mode */ | ||
| if ((fildes = open(TEMPFILE, O_RDONLY)) < 0) { | ||
| tst_brkm(TFAIL, cleanup, "reopening %s readonly failed", | ||
| TEMPFILE); | ||
| } | ||
| static void run(void) | ||
| { | ||
| addr = SAFE_MMAP(NULL, page_sz, PROT_READ, MAP_FILE | MAP_SHARED, fd, 0); | ||
|
|
||
| /* 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)"); | ||
| } | ||
| if (memcmp(buf, addr, page_sz) == 0) | ||
| tst_res(TPASS, "mmap() functionality successful"); | ||
| else | ||
| tst_res(TFAIL, "mapped memory area contains invalid data"); | ||
|
|
||
| SAFE_MUNMAP(addr, page_sz); | ||
| } | ||
|
|
||
| static void cleanup(void) | ||
| { | ||
| close(fildes); | ||
| free(dummy); | ||
| tst_rmdir(); | ||
| if (fd > 0) | ||
| SAFE_CLOSE(fd); | ||
|
|
||
| free(buf); | ||
| } | ||
|
|
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| static struct tst_test test = { | ||
| .setup = setup, | ||
| .cleanup = cleanup, | ||
| .test_all = run, | ||
| .needs_tmpdir = 1 | ||
| }; |