295 lines
8.0 KiB
C
295 lines
8.0 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: mmap02
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*
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* Test Description:
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* Call mmap() with prot parameter set to PROT_READ and with the file
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* descriptor being open for read, to map a file creating mapped memory
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* with read access. The minimum file permissions should be 0444.
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*
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* The call should succeed to create the mapped region with required
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* attributes.
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*
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* Expected Result:
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* mmap() should succeed returning the address of the mapped region,
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* the mapped region should contain the contents of the mapped file.
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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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* Log the errno and Issue a FAIL message.
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* Otherwise,
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* Verify the Functionality of system call
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* if successful,
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* Issue Functionality-Pass message.
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* Otherwise,
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* Issue Functionality-Fail message.
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* Cleanup:
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* Print timing stats if options given
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* Delete the temporary directory created.
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*
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* Usage: <for command-line>
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* mmap02 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
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* where, -c n : Run n copies concurrently.
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* -f : Turn off functionality Testing.
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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 <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <unistd.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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char *TCID="mmap02"; /* 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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char *addr; /* addr of memory mapped region */
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char *dummy; /* dummy string */
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size_t page_sz; /* system page size */
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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(); /* 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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/* 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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TEST(mmap(0, page_sz, PROT_READ,
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MAP_FILE|MAP_SHARED, fildes, 0));
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/* Check for the return value of mmap() */
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if (TEST_RETURN == (int)MAP_FAILED) {
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tst_resm(TFAIL, "mmap() Failed on %s, errno=%d : %s",
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TEMPFILE, errno, strerror(errno));
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continue;
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}
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/*
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* Perform functional verification if test
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* executed without (-f) option.
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*/
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if (STD_FUNCTIONAL_TEST) {
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/* Get the mmap return value */
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addr = (char *)TEST_RETURN;
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/*
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* Read the file contents into the dummy
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* string.
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*/
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if (read(fildes, dummy, page_sz) < 0) {
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tst_brkm(TFAIL, cleanup, "read() on %s Failed, "
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"error:%d", TEMPFILE, errno);
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}
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/*
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* Check whether mapped memory region has
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* the file contents.
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*/
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if (memcmp(dummy, addr, page_sz)) {
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tst_resm(TFAIL, "mapped memory area contains "
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"invalid data");
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} else {
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tst_resm(TPASS,
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"Functionality of mmap() successful");
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}
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} else {
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tst_resm(TPASS, "call succeeded");
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}
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/* Clean up things in case we are looping */
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/* Unmap the mapped memory */
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if (munmap(addr, page_sz) != 0) {
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tst_brkm(TFAIL, NULL, "munmap() fails to unmap the "
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"memory, 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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*
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* Get system page size, allocate and initialize the string dummy.
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* Initialize addr such that it is more than one page below the break
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* address of the process, and initialize one page region from addr
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* with char 'A'.
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* Create a temporary directory a file under it.
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* Write some known data into file and close it.
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* Change mode permissions on file to 0444.
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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(FORK, 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_RDWR | O_CREAT, 0666)) < 0) {
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tst_brkm(TFAIL, NULL, "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, sizeof(tst_buff)) < sizeof(tst_buff)) {
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tst_brkm(TFAIL, NULL, "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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/* Close the temporary file */
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if (close(fildes) < 0) {
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tst_brkm(TFAIL, cleanup, "close() Failed on %s, errno=%d : %s",
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TEMPFILE, errno, strerror(errno));
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}
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/* Change Mode permissions on Temporary file */
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if (chmod(TEMPFILE, 0444) < 0) {
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tst_brkm(TFAIL, cleanup, "chmod(%s, 0444) Failed, errno=%d : "
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"%s", TEMPFILE, errno, strerror(errno));
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}
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/* Open the temporary file again, - Readonly mode */
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if ((fildes = open(TEMPFILE, O_RDONLY)) < 0) {
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tst_brkm(TFAIL, cleanup, "open(%s, O_RDONLY) Failed, errno=%d "
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": %s", TEMPFILE, errno, strerror(errno));
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}
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/* Allocate and initialize dummy string of system page size bytes */
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if ((dummy = (char *)calloc(page_sz, sizeof(char))) == NULL) {
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tst_brkm(TFAIL, NULL, "calloc() failed to allocate space");
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tst_exit();
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}
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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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* Free the memory allocated to dummy variable.
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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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*/
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TEST_CLEANUP;
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/* Free the memory allocated for dummy string */
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if (dummy) {
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free(dummy);
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}
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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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