147 lines
3.3 KiB
C
147 lines
3.3 KiB
C
/*
|
|
* 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"
|
|
|
|
#define TEMPFILE "mmapfile"
|
|
|
|
char *TCID = "mmap07";
|
|
int TST_TOTAL = 1;
|
|
|
|
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;
|
|
|
|
tst_parse_opts(ac, av, NULL, NULL);
|
|
|
|
setup();
|
|
|
|
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;
|
|
}
|
|
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;
|
|
|
|
page_sz = getpagesize();
|
|
|
|
/* 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) < (int)page_sz) {
|
|
free(tst_buff);
|
|
tst_brkm(TFAIL, cleanup, "writing to %s failed", TEMPFILE);
|
|
}
|
|
|
|
free(tst_buff);
|
|
}
|
|
|
|
static void cleanup(void)
|
|
{
|
|
close(fildes);
|
|
tst_rmdir();
|
|
}
|