237 lines
6.3 KiB
C
237 lines
6.3 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* Test Name: mmap06
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*
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* Test Description:
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* Call mmap() to map a file creating a mapped region with read access
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* under the following conditions -
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* - The prot parameter is set to PROT_READ
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* - The file descriptor is open for writing.
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*
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* The call should fail to map the file.
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*
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* Expected Result:
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* mmap() should fail returning -1 and errno should get set to EACCES.
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*
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* Algorithm:
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* Setup:
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* Setup signal handling.
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* Pause for SIGUSR1 if option specified.
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* Create temporary directory.
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*
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* Test:
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* Loop if the proper options are given.
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* Execute system call
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* Check return code, if system call failed (return=-1)
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* if errno set == expected errno
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* Issue sys call fails with expected return value and errno.
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* Otherwise,
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* Issue sys call fails with unexpected errno.
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* Otherwise,
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* Issue sys call returns unexpected value.
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*
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* Cleanup:
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* Print errno log and/or timing stats if options given
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* Delete the temporary directory(s)/file(s) created.
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*
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* Usage: <for command-line>
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* mmap06 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
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* where, -c n : Run n copies concurrently.
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* -e : Turn on errno logging.
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* -i n : Execute test n times.
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* -I x : Execute test for x seconds.
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* -P x : Pause for x seconds between iterations.
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* -t : Turn on syscall timing.
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*
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* HISTORY
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* 07/2001 Ported by Wayne Boyer
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*
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* RESTRICTIONS:
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* None.
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*/
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#include <sys/types.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <string.h>
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#include <signal.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include "test.h"
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#include "usctest.h"
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#define TEMPFILE "mmapfile"
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const char *TCID="mmap06"; /* Test program identifier. */
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int TST_TOTAL=1; /* Total number of test cases. */
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extern int Tst_count; /* Test Case counter for tst_* routines */
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int exp_enos[]={EACCES, 0};
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size_t page_sz; /* system page size */
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char *addr; /* addr of memory mapped region */
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int fildes = -1; /* file descriptor for temporary file */
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void setup(); /* Main setup function of test */
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void cleanup(void) __attribute__((noreturn)); /* cleanup function for the test */
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int
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main(int ac, char **av)
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{
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int lc; /* loop counter */
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const char *msg; /* message returned from parse_opts */
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/* Parse standard options given to run the test. */
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msg = parse_opts(ac, av, (option_t *) NULL, NULL);
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if (msg != (char *) NULL) {
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tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
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tst_exit();
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}
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/* Perform global setup for test */
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setup();
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/* set the expected errnos... */
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TEST_EXP_ENOS(exp_enos);
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/* Check looping state if -i option given */
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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/* Reset Tst_count in case we are looping. */
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Tst_count=0;
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/*
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* Call mmap to map the temporary file 'TEMPFILE'
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* with read access.
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*/
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errno = 0;
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addr = mmap(0, page_sz, PROT_READ,
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MAP_FILE|MAP_SHARED, fildes, 0);
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TEST_ERRNO = errno;
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/* Check for the return value of mmap() */
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if (addr != MAP_FAILED) {
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tst_resm(TFAIL, "mmap() returned invalid value, "
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"expected: -1");
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/* Unmap the mapped memory */
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if (munmap(addr, page_sz) != 0) {
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tst_brkm(TBROK, cleanup, "munmap() failed");
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}
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continue;
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}
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TEST_ERROR_LOG(TEST_ERRNO);
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if (TEST_ERRNO == EACCES) {
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tst_resm(TPASS, "mmap() fails, 'fd' doesn't allow "
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"desired access, errno:%d", errno);
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} else {
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tst_resm(TFAIL, "mmap() fails, 'fd' doesn't allow "
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"desired access, invalid errno:%d", errno);
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}
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} /* End for TEST_LOOPING */
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/* Call cleanup() to undo setup done for the test. */
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cleanup();
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/*NOTREACHED*/
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} /* End main */
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/*
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* setup() - performs all ONE TIME setup for this test.
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* Get the system page size.
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* Create a temporary directory and a file under it.
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* Write some known data into file.
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*/
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void
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setup()
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{
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char *tst_buff; /* test buffer to hold known data */
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/* capture signals */
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tst_sig(NOFORK, DEF_HANDLER, cleanup);
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/* Pause if that option was specified */
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TEST_PAUSE;
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/* Get the system page size */
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if ((page_sz = getpagesize()) < 0) {
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tst_brkm(TFAIL, NULL,
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"getpagesize() fails to get system page size");
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tst_exit();
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}
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/* Allocate space for the test buffer */
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if ((tst_buff = (char *)calloc(page_sz, sizeof(char))) == NULL) {
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tst_brkm(TFAIL, NULL,
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"calloc() failed to allocate space for tst_buff");
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tst_exit();
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}
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/* Fill the test buffer with the known data */
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memset(tst_buff, 'A', page_sz);
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/* make a temp directory and cd to it */
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tst_tmpdir();
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/* Creat a temporary file used for mapping */
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if ((fildes = open(TEMPFILE, O_WRONLY | O_CREAT, 0666)) < 0) {
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tst_brkm(TFAIL, NULL,
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"open() on %s Failed, errno=%d : %s",
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TEMPFILE, errno, strerror(errno));
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free(tst_buff);
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cleanup();
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}
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/* Write test buffer contents into temporary file */
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if (write(fildes, tst_buff, page_sz) < page_sz) {
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tst_brkm(TFAIL, NULL,
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"write() on %s Failed, errno=%d : %s",
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TEMPFILE, errno, strerror(errno));
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free(tst_buff);
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cleanup();
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}
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/* Free the memory allocated for test buffer */
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free(tst_buff);
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}
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/*
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* cleanup() - performs all ONE TIME cleanup for this test at
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* completion or premature exit.
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* Remove the temporary directory created.
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*/
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void
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cleanup()
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{
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/*
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* print timing stats if that option was specified.
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* print errno log if that option was specified.
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*/
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TEST_CLEANUP;
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if (fildes >= 0)
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close (fildes);
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/* Remove tmp dir and all files in it */
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tst_rmdir();
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/* exit with return code appropriate for results */
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tst_exit();
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}
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