关于RLFS文件系统，文件时间的问题

ifree

按照文档，使用如下函数设置文件的时间，获取文件时间。

设置文件时间代码：

[C] 纯文本查看 复制代码

void set_timestamp (void) {
  fsTime timedate;
 
  // Set time and date
  timedate.hr   = 17;
  timedate.min  = 30;
  timedate.sec  = 2;
 
  timedate.day  = 25;
  timedate.mon  = 10;
  timedate.year = 2019;
 
  // Modify the timestamps
  if (ftime_set ("file.txt", &timedate, &timedate, &timedate) == fsOK) {
    printf ("File create, last access and last write time were successfully modified.\n");
  }
  else {
    printf ("Failed to set the file timestamp.\n");
  }
}

查看文件时间代码

[C] 纯文本查看 复制代码

void get_timestamp (void) {
  fsTime create, access, write;
 
  // Get the timestamps
  if (ftime_get ("file.txt", &create, &access, &write) == fsOK) {
    printf ("File create, last access and last write time were successfully retrieved.\n");
 
    //Output the file create time and date information
    printf ("Create Time: %d:%d:%d, %d.%d.%d\n", create.hr,  create.min, create.sec, \
                                                 create.day, create.mon, create.year);
  }
  else {
    printf ("Failed to get the file timestamp.\n");
  }
}

这两个函数，运行printf的信息都是成功的，设置文件时间后，又重新打印文件时间，运行看到的结果都是正确的。

但是，把SD卡拔出来，插到电脑上看，文件时间就不对了。时间也看不出什么规律来。这是什么问题？

eric2013

没测试过这个函数，后面有时间了试试。

gallop020142

试试先用fclose关掉文件，再设置ftime_set