stat命令的实现-mysate（课上测试）

1. 提交学习stat（1）的截图
   

2. 推导出实现stat(1)需要的系统调用，并给出实现stat(1)的伪代码

   • 需要的系统调用：readdir() 、closedir()、fstat()、lstat()、fstatat()

   • 伪代码

     include <stdio.h>

     include <stdlib.h>

     include <unistd.h>

     include <sys/stat.h>

     include <dirent.h>

     int main(int argc, char *argv[])
     {
     if (argc < 2)
     {
     printf("Usage: %s \n", argv[0]);
     return 1;
     }
     struct stat stat_info;
     int lstat_result = lstat(argv[1], &stat_info);
     if (lstat_result == -1)
     {
     printf("Error: 无法获取 %s 的状态信息\n", argv[1]);
     return 1;
     }
     printf("File status for %s:\n", argv[1]);
     printf(" st_mode: %lu\n", stat_info.st_mode);
     printf(" st_size: %lu\n", stat_info.st_size);
     printf(" st_mtime: %lu\n", stat_info.st_mtime);
     printf(" st_ctime: %lu\n", stat_info.st_ctime);
     return 0;
     }

3. 编写产品代码 mystate.c，提交代码

   include <stdio.h>

   include <stdlib.h>

   include <unistd.h>

   include <sys/stat.h>

   include <dirent.h>

   int main(int argc, char *argv[]) {
   if (argc < 2) {
   printf("Usage: %s \n", argv[0]);
   return 1;
   }

   struct stat stat_info;
   int lstat_result = lstat(argv[1], &stat_info);

   if (lstat_result == -1) {
   printf("Error: 无法获取 %s 的状态信息\n", argv[1]);
   return 1;
   }

   printf("File status for %s:\n", argv[1]);
   printf(" st_mode: %lu\n", stat_info.st_mode);
   printf(" st_size: %lu\n", stat_info.st_size);
   printf(" st_mtime: %lu\n", stat_info.st_mtime);
   printf(" st_ctime: %lu\n", stat_info.st_ctime);

   return 0;
   }

4. 测试代码，mystat 与stat（1）对比，提交截图