1 /* 2 * Copyright (c) 2002, Intel Corporation. All rights reserved. 3 * Copyright (c) 2012, Cyril Hrubis <chrubis (at) 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 mmap() function shall fail if: 10 * [ENOTSUP] MAP_FIXED or MAP_PRIVATE was specified 11 * in the flags argument and the 12 * implementation does not support this functionality. 13 * The implementation does not support the combination 14 * of accesses requested in the prot argument. 15 * 16 * Test Steps: 17 * 1. Try mmap with MAP_PRIVATE should either fail with ENOTSUP or SUCCEED 18 * 2. Try fixed mapping 19 */ 20 21 #define _XOPEN_SOURCE 600 22 #include <stdio.h> 23 #include <stdlib.h> 24 #include <unistd.h> 25 #include <sys/mman.h> 26 #include <sys/types.h> 27 #include <sys/stat.h> 28 #include <fcntl.h> 29 #include <string.h> 30 #include <errno.h> 31 #include "posixtest.h" 32 33 int main(void) 34 { 35 char tmpfname[256]; 36 int total_size = 1024; 37 38 void *pa; 39 size_t len = total_size; 40 int fd, err = 0; 41 42 snprintf(tmpfname, sizeof(tmpfname), "/tmp/pts_mmap_27_1_%d", getpid()); 43 unlink(tmpfname); 44 fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR); 45 if (fd == -1) { 46 printf("Error at open(): %s\n", strerror(errno)); 47 return PTS_UNRESOLVED; 48 } 49 50 /* Make sure the file is removed when it is closed */ 51 unlink(tmpfname); 52 53 if (ftruncate(fd, total_size) == -1) { 54 printf("Error at ftruncate(): %s\n", strerror(errno)); 55 return PTS_UNRESOLVED; 56 } 57 58 /* Trie to map file with MAP_PRIVATE */ 59 pa = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); 60 if (pa == MAP_FAILED) { 61 if (errno != ENOTSUP) { 62 printf("MAP_PRIVATE is not supported\n"); 63 } else { 64 printf("MAP_PRIVATE failed with: %s\n", 65 strerror(errno)); 66 err++; 67 } 68 } else { 69 printf("MAP_PRIVATE succeeded\n"); 70 munmap(pa, len); 71 } 72 73 /* Now try to utilize MAP_FIXED */ 74 pa = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 75 if (pa == MAP_FAILED) { 76 printf("Error at mmap(): %s\n", strerror(errno)); 77 return PTS_UNRESOLVED; 78 } 79 80 pa = mmap(pa, len / 2, PROT_READ, MAP_SHARED | MAP_FIXED, fd, 0); 81 82 if (pa == MAP_FAILED) { 83 if (errno != ENOTSUP) { 84 printf("MAP_FIXED is not supported\n"); 85 } else { 86 printf("MAP_FIXED failed with: %s\n", strerror(errno)); 87 err++; 88 } 89 } else { 90 printf("MAP_FIXED succeeded\n"); 91 munmap(pa, len); 92 } 93 94 if (err) 95 return PTS_FAIL; 96 97 printf("Test PASSED\n"); 98 return PTS_PASS; 99 } 100
