1/* 2 * Copyright (c) 2002, Intel Corporation. All rights reserved. 3 * Copyright (c) 2012, Cyril Hrubis <chrubis@suse.cz> 4 * 5 * This file is licensed under the GPL license. For the full content 6 * of this license, see the COPYING file at the top level of this 7 * source tree. 8 * 9 * The off argument is constrained to be aligned and sized 10 * according to the value returned by 11 * sysconf() when passed _SC_PAGESIZE or _SC_PAGE_SIZE. 12 * 13 * The mmap() function shall fail if: [EINVAL] The addr argument (if MAP_FIXED 14 * was specified) or off is not a multiple of the page size as returned by 15 * sysconf(), or is considered invalid by the implementation. 16 * 17 * Test Steps: 18 * 1. Set 'off' a value which is not a multiple of page size; 19 * 2. Call mmap() and get EINVAL; 20 * 21 */ 22 23#define _XOPEN_SOURCE 600 24 25#include <stdio.h> 26#include <stdlib.h> 27#include <unistd.h> 28#include <sys/mman.h> 29#include <sys/types.h> 30#include <sys/stat.h> 31#include <sys/wait.h> 32#include <fcntl.h> 33#include <string.h> 34#include <errno.h> 35#include "posixtest.h" 36 37int main(void) 38{ 39 char tmpfname[256]; 40 long page_size; 41 long total_size; 42 43 void *pa; 44 size_t size; 45 int fd, saved_errno; 46 off_t off; 47 48 page_size = sysconf(_SC_PAGE_SIZE); 49 total_size = 3 * page_size; 50 size = page_size; 51 52 snprintf(tmpfname, sizeof(tmpfname), "/tmp/pts_mmap_11_1_%d", getpid()); 53 unlink(tmpfname); 54 fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR); 55 if (fd == -1) { 56 printf("Error at open(): %s\n", strerror(errno)); 57 return PTS_UNRESOLVED; 58 } 59 unlink(tmpfname); 60 61 if (ftruncate(fd, total_size) == -1) { 62 printf("Error at ftruncate(): %s\n", strerror(errno)); 63 return PTS_UNRESOLVED; 64 } 65 66 /* This offset is considered illegal, not a multiple of page_size, 67 * unless the page_size is 1 byte, which is considered impossible. 68 */ 69 off = page_size + 1; 70 errno = 0; 71 pa = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, off); 72 73 saved_errno = errno; 74 75 close(fd); 76 munmap(pa, size); 77 78 if (pa == MAP_FAILED && saved_errno == EINVAL) { 79 printf("Got EINVAL when 'off' is not multiple of page size\n"); 80 printf("Test PASSED\n"); 81 return PTS_PASS; 82 } 83 84 printf("Test FAILED: Did not get EINVAL" 85 " when 'off' is not a multiple of page size, get: %s\n", 86 strerror(saved_errno)); 87 88 return PTS_FAIL; 89} 90