| /* |
| * Copyright (c) 2002, Intel Corporation. All rights reserved. |
| * 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. |
| * |
| * MPR An implementation may permit accesses other than those specified by prot; |
| * however, if the Memory Protection option is supported, the implementation |
| * shall not permit a write to succeed where PROT_WRITE has not been set or |
| * shall not permit any access where PROT_NONE alone has been set. |
| * The implementation shall support at least the following values of prot: |
| * PROT_NONE, PROT_READ, PROT_WRITE, and the bitwise-inclusive OR of PROT_READ and |
| * PROT_WRITE. |
| * |
| * Test Step: |
| * |
| * If the Memory Protection option is supported: |
| * |
| * 1. Spawn a child process. |
| * 2. The child process mmap a memory region setting prot as PROT_NONE. |
| * 3. Try to read the mapped memory. |
| * 4. If the read will triger SIGSEGV, the PASS. |
| * |
| * Please refer to IEEE_1003.1-2001. 2.8.3.3 Memory Protection. |
| */ |
| |
| #define _XOPEN_SOURCE 600 |
| #include <sys/mman.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/wait.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <pthread.h> |
| #include <signal.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include "posixtest.h" |
| |
| #define TNAME "mmap/6-2.c" |
| |
| int main(void) |
| { |
| |
| #ifdef _POSIX_MEMORY_PROTECTION |
| char tmpfname[256]; |
| char* data; |
| int total_size = 1024; |
| |
| void *pa = NULL; |
| void *addr = NULL; |
| size_t size = total_size; |
| int flag = MAP_SHARED; |
| int fd; |
| off_t off = 0; |
| int prot; |
| |
| char * ch; |
| |
| pid_t child; |
| int status; |
| int sig_num; |
| |
| snprintf(tmpfname, sizeof(tmpfname), "/tmp/pts_mmap_6_2_%d", |
| getpid()); |
| unlink(tmpfname); |
| fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL, |
| S_IRUSR | S_IWUSR); |
| if (fd == -1) |
| { |
| printf(TNAME " Error at open(): %s\n", |
| strerror(errno)); |
| exit(PTS_UNRESOLVED); |
| } |
| unlink(tmpfname); |
| |
| child = fork(); |
| |
| if (child == 0) |
| { |
| fflush (NULL); |
| data = (char *) malloc(total_size); |
| memset(data, 'a', total_size); |
| if (write(fd, data, total_size) != total_size) |
| { |
| printf(TNAME "Error at write(): %s\n", |
| strerror(errno)); |
| exit(PTS_UNRESOLVED); |
| } |
| free(data); |
| |
| prot = PROT_NONE; |
| pa = mmap(addr, size, prot, flag, fd, off); |
| if (pa == MAP_FAILED) |
| { |
| printf("Test Fail: " TNAME " Error at mmap: %s\n", |
| strerror(errno)); |
| exit(PTS_FAIL); |
| } |
| |
| ch = pa; |
| /* Read acess */ |
| if (*ch != 'a') |
| { |
| printf ("Test Fail: " TNAME |
| " The file did not mapped to memory\n"); |
| exit(PTS_FAIL); |
| } |
| exit(0); |
| } |
| else if (child > 0) |
| { |
| waitpid(child, &status, 0); |
| close(fd); |
| if (WIFSTOPPED(status)) |
| { |
| sig_num = WSTOPSIG(status); |
| if (sig_num == SIGSEGV) |
| { |
| printf("Test Pass: " TNAME |
| " Got SIGSEGV when reading the mapped memory, " |
| "setting PROT_NONE\n"); |
| return PTS_PASS; |
| } |
| printf("Child process stopped by signal %d\n", sig_num); |
| } |
| if (WIFSIGNALED(status)) |
| { |
| sig_num = WTERMSIG(status); |
| if (sig_num == SIGSEGV) |
| { |
| printf ("Test Pass: " TNAME |
| " Got SIGSEGV when reading the mapped memory, " |
| " setting PROT_NOTE\n"); |
| return PTS_PASS; |
| } |
| printf("Child process terminated by signal %d\n", sig_num); |
| } |
| if (WIFEXITED(status)) |
| { |
| if (WEXITSTATUS(status) == 0) |
| { |
| printf ("Test FAIL: " TNAME |
| " Did not got SIGSEGV when reading the mapped memory," |
| " setting PROT_NOTE\n"); |
| return PTS_FAIL; |
| } |
| |
| } |
| printf ("Test Unresolved\n"); |
| return PTS_UNRESOLVED; |
| } |
| |
| #else |
| printf ("Test Unresolved: " TNAME |
| " _POSIX_MEMORY_PROTECTION not defined\n"); |
| return PTS_UNRESOLVED; |
| #endif |
| |
| } |