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/*
* Copyright (c) 2002, Intel Corporation. All rights reserved.
* Copyright (c) 2012, Cyril Hrubis <chrubis@suse.cz>
*
* This file is licensed under the GPL license. For the full content
* of this license, see the COPYING file at the top level of this
* source tree.
*
* The file descriptor fildes shall have been opened with read permission,
* regardless of the protection options specified. If PROT_WRITE is
* specified, the application shall ensure that it has opened the file
* descriptor fildes with write permission unless MAP_PRIVATE
* is specified in the flags parameter as described below.
*
* Test Steps:
* 1 Open a file with read only permition.
* 2. Mmap the file to a memory region setting prot as PROT_WRITE.
* 3. Setting flag as MAP_PRIVATE.
* 4. The mmap() should be sucessful.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include "posixtest.h"
#include "tempfile.h"
int main(void)
{
char tmpfname[PATH_MAX];
void *pa;
size_t size = 1024;
int fd;
/* Create the file */
PTS_GET_TMP_FILENAME(tmpfname, "pts_mmap_6_5");
unlink(tmpfname);
fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR);
if (fd == -1) {
printf("Error at open(): %s\n", strerror(errno));
return PTS_UNRESOLVED;
}
if (ftruncate(fd, size) == -1) {
printf("Error at ftruncate(): %s\n", strerror(errno));
return PTS_UNRESOLVED;
}
close(fd);
/* Open it readonly */
fd = open(tmpfname, O_RDONLY, S_IRUSR | S_IWUSR);
if (fd == -1) {
printf("Error at 2nd open(): %s\n", strerror(errno));
return PTS_UNRESOLVED;
}
unlink(tmpfname);
pa = mmap(NULL, size, PROT_WRITE, MAP_PRIVATE, fd, 0);
if (pa == MAP_FAILED) {
printf("Error at mmap(): %s\n", strerror(errno));
return PTS_FAIL;
}
munmap(pa, size);
close(fd);
printf("Successfully mapped readonly file with "
"PROT_WRITE, MAP_PRIVATE\n" "Test PASSED\n");
return PTS_PASS;
}
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