Visual C ++ 2015 Express:_stat在Windows XP上不起作用 [英] Visual C++ 2015 express: _stat not working on Windows XP
问题描述
运行以下使用Visual C ++编译的来自MSDN的_stat的示例将v140_xp
用作Platform Toolset
(目标Win32)的2015 Express在Windows 7上正常运行,但在我测试的多台计算机上的Windows XP上却无法正常运行.
// crt_stat.c
// This program uses the _stat function to
// report information about the file named crt_stat.c.
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <errno.h>
int main()
{
struct _stat buf;
int result;
char timebuf[26];
char* filename = "crt_stat.c"; // Absolute paths like "D:\\crt_stat.c" produce the same behaviour.
errno_t err;
// Get data associated with "crt_stat.c":
result = _stat( filename, &buf );
// Check if statistics are valid:
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." );
return 1;
}
printf( "Time modified : %s", timebuf );
}
}
Windows 7输出:
File size : 6
Drive : D:
Time modified : Tue Sep 8 10:06:57 2015
Windows XP输出:
Problem getting information: Invalid argument
Invalid parameter to _stat.
是的,crt_stat.c位于可执行文件目录中,该目录也是CWD. p>
这是Bug还是我错过了什么?
正如注释中指出的,它是example for _stat from MSDN compiled with Visual C++ 2015 Express using v140_xp
as Platform Toolset
(target Win32) runs normally on Windows 7 but not on Windows XP on several machines I tested.
// crt_stat.c
// This program uses the _stat function to
// report information about the file named crt_stat.c.
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <errno.h>
int main()
{
struct _stat buf;
int result;
char timebuf[26];
char* filename = "crt_stat.c"; // Absolute paths like "D:\\crt_stat.c" produce the same behaviour.
errno_t err;
// Get data associated with "crt_stat.c":
result = _stat( filename, &buf );
// Check if statistics are valid:
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." );
return 1;
}
printf( "Time modified : %s", timebuf );
}
}
Windows 7 output:
File size : 6
Drive : D:
Time modified : Tue Sep 8 10:06:57 2015
Windows XP output:
Problem getting information: Invalid argument
Invalid parameter to _stat.
And yes crt_stat.c is located in the executables directory which also is the CWD.
Is this a Bug or am I missing something?
As pointed out in the comments, it is a bug in the runtime. Right now (2015-09-09) the fix is not yet available in an update, but probably will be soon. A workaround is to use GetFileAttributesEx
instead.
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