时间:2008-07-24 14:55:12   来源:论坛整理  作者:  编辑:chinaitzhe

struct stat {
mode_t st_mode; /* file type & mode (permissions) */
ino_t st_ino; /* i-node number (serial number) */
dev_t st_dev; /* device number (file system) */
dev_t st_rdev; /* device number for special files */
nlink_t st_nlink; /* number of links */
uid_t st_uid; /* user ID of owner */
gid_t st_gid; /* group ID of owner */
off_t st_size; /* size in bytes, for regular files */
time_t st_atime; /* time of last access */
time_t st_mtime; /* time of last modification */
time_t st_ctime; /* time of last file status change */
blksize_t st_blksize; /* best I/O block size */
blkcnt_t st_blocks; /* number of disk blocks allocated */
};

#include <sys/stat.h>
#include <iostream>
using namespace std;

int main()
{
struct stat buf;
stat("main.cpp", &buf);
time_t buf.st_ctime < <endl;
return 0;
}

得到的是个负值 -1209766741，为什么？
网友回复:stat("main.cpp", &buf);
time_t buf.st_ctime < <endl; ??????????
网友回复:检查一下函数调用得结果，参照MSDN的示例：

C/C code

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int result = _stat("main.cpp", &buf);

if( result != 0 )

   {

      perror( "Problem getting information" );

      switch (errno)

      {

         case ENOENT:

           printf("File %s not found.\n", filename);

           break;

         case EINVAL:

           printf("Invalid parameter to _stat.\n");

           break;

         default:

           /* Should never be reached. */

           printf("Unexpected error in _stat.\n");

      }

   }

   else

   {

      // Output some of the statistics: 

      printf( "File size     : %ld\n", buf.st_size );

      printf( "Drive         : %c:\n", buf.st_dev   'A' );

      err = ctime_s(timebuf, 26, &buf.st_mtime);

      if (err)

      {

         printf("Invalid arguments to ctime_s.");

         exit(1);

      }

      printf( "Time modified : %s", timebuf );

   }

网友回复:

引用 1 楼 yyyapple 的回复:

stat("main.cpp", &buf);
time_t buf.st_ctime < <endl; ??????????

cout < <buf.st_ctime < <endl;


buf.st_ctime 是一个长整型time_t，cout应该可以输出啊，输出一个长整型。
网友回复:

引用 3 楼 cdhit 的回复:

引用 1 楼 yyyapple 的回复:
stat("main.cpp", &buf);
time_t buf.st_ctime < <endl; ??????????

cout < <buf.st_ctime < <endl;


buf.st_ctime 是一个长整型time_t，cout应该可以输出啊，输出一个长整型。

并且应该是一个正数，不该溢出。