| /* |
| * 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. |
| * |
| * The st_atime field of the mapped file may be marked for update |
| * at any time between the mmap() call and the corresponding munmap() |
| * call. The initial read or write reference to a mapped region |
| * shall cause the file¡¯s st_atime field to be marked for update if |
| * it has not already been marked for update. |
| * |
| * Test Steps: |
| * 1. Do stat before mmap() and after munmap(), |
| * also after writing the mapped region. |
| * 2. Compare whether st_atime has been updated. |
| */ |
| |
| /* adam.li@intel.com: On linux, it looks mmap() will update |
| * st_atime, write to the mapped region will not cause the update |
| * */ |
| |
| #define _XOPEN_SOURCE 600 |
| |
| #include <pthread.h> |
| #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" |
| |
| #define TNAME "mmap/13-1.c" |
| |
| int main() |
| { |
| char tmpfname[256]; |
| char* data; |
| long total_size; |
| |
| void *pa = NULL; |
| void *addr = NULL; |
| size_t size; |
| int flag; |
| int fd; |
| off_t off = 0; |
| int prot; |
| |
| total_size = 1024; |
| size = total_size; |
| |
| struct stat stat_buff, stat_buff2; |
| time_t atime1, atime2, atime3; |
| |
| char *ch; |
| |
| snprintf(tmpfname, sizeof(tmpfname), "/tmp/pts_mmap_13_1_%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); |
| } |
| |
| data = (char *) malloc(total_size); |
| memset(data, 'a', total_size); |
| printf("Time before write(): %ld\n", time(NULL)); |
| if (write(fd, data, total_size) != total_size) |
| { |
| printf(TNAME "Error at write(): %s\n", |
| strerror(errno)); |
| unlink(tmpfname); |
| exit(PTS_UNRESOLVED); |
| } |
| free(data); |
| |
| if (stat(tmpfname, &stat_buff) == -1) |
| { |
| printf(TNAME " Error at 1st stat(): %s\n", |
| strerror(errno)); |
| unlink(tmpfname); |
| exit(PTS_UNRESOLVED); |
| } |
| /* atime1: write */ |
| atime1 = stat_buff.st_atime; |
| |
| sleep(1); |
| |
| flag = MAP_SHARED; |
| prot = PROT_READ | PROT_WRITE; |
| printf("Time before mmap(): %ld\n", time(NULL)); |
| pa = mmap(addr, size, prot, flag, fd, off); |
| if (pa == MAP_FAILED) |
| { |
| printf ("Test Fail: " TNAME " Error at mmap: %s\n", |
| strerror(errno)); |
| unlink(tmpfname); |
| exit(PTS_FAIL); |
| } |
| |
| if (stat(tmpfname, &stat_buff2) == -1) |
| { |
| printf(TNAME " Error at 2nd stat(): %s\n", |
| strerror(errno)); |
| unlink(tmpfname); |
| exit(PTS_UNRESOLVED); |
| } |
| /* for mmap */ |
| atime2 = stat_buff2.st_atime; |
| |
| /* Wait a while in case the precision of the sa_time |
| * is not acurate enough to reflect the change |
| */ |
| sleep(1); |
| |
| /* write reference to mapped memory */ |
| ch = pa; |
| *ch = 'b'; |
| |
| printf("Time before munmap(): %ld\n", time(NULL)); |
| munmap(pa, size); |
| |
| /* FIXME: Update the in-core meta data to the disk */ |
| fsync(fd); |
| close(fd); |
| if (stat(tmpfname, &stat_buff) == -1) |
| { |
| printf(TNAME " Error at 3rd stat(): %s\n", |
| strerror(errno)); |
| unlink(tmpfname); |
| exit(PTS_UNRESOLVED); |
| } |
| /* atime3: write to memory */ |
| atime3 = stat_buff.st_atime; |
| |
| printf("atime1: %d, atime2: %d, atime3: %d\n", |
| (int)atime1, (int)atime2, (int)atime3); |
| if (atime1 != atime3 || |
| atime1 != atime2) |
| { |
| printf ("Test Pass\n"); |
| unlink(tmpfname); |
| exit(PTS_PASS); |
| } |
| |
| printf("Test Fail " TNAME " st_atime did not update properly\n"); |
| unlink(tmpfname); |
| return PTS_FAIL; |
| } |