_stat, _stat32, _stat64, _stati64, _stat32i64, _stat64i32, _wstat, _wstat32, _wstat64, _wstati64, _wstat32i64, _wstat64i32 (CRT)

Get status information on a file.

int _stat(
   const char *path,
   struct _stat *buffer 
);
int _stat32(
   const char *path,
   struct __stat32 *buffer 
);
int _stat64(
   const char *path,
   struct __stat64 *buffer 
);
int _stati64(
   const char *path,
   struct _stati64 *buffer 
);
int _stat32i64(str
   const char *path,
      struct _stat32i64 *buffer 
);
int _stat64i32(str
      const char *path,
   struct _stat64i32 *buffer 
);
int _wstat(
   const wchar_t *path,
   struct _stat *buffer 
);
int _wstat32(
   const wchar_t *path,
   struct __stat32 *buffer 
);
int _wstat64(
   const wchar_t *path,
   struct __stat64 *buffer 
);
int _wstati64(
   const wchar_t *path,
   struct _stati64 *buffer 
);
int _wstat32i64(
   const wchar_t *path,
   struct _stat32i64 *buffer 
);
int _wstat64i32(
   const wchar_t *path,
   struct _stat64i32 *buffer 
);

Parameters

path

Pointer to a string containing the path of existing file.

buffer

Pointer to structure that stores results.

Return Value

Each of these functions returns 0 if the file-status information is obtained. A return value of –1 indicates an error, in which case errno is set to ENOENT, indicating that the filename or path could not be found. A return value of EINVAL indicates an invalid parameter; errno is also set to EINVAL in this case.

See _doserrno, errno, _sys_errlist, and _sys_nerr for more information on this, and other, return codes.

The date stamp on a file can be represented if it is later than midnight, January 1, 1970, and before 23:59:59, December 31, 3000, UTC, unless you use _stat32 or _wstat32, or have defined _USE_32BIT_TIME_T, in which case the date can be represented only until 03:14:07 January 19, 2038, UTC.

Remarks

The _stat function obtains information about the file or directory specified by path and stores it in the structure pointed to by buffer. _stat automatically handles multibyte-character string arguments as appropriate, recognizing multibyte-character sequences according to the multibyte code page currently in use.

_wstat is a wide-character version of _stat; the path argument to _wstat is a wide-character string. _wstat and _stat behave identically except that _wstat does not handle multibyte-character strings.

Variations of these functions support 32- or 64-bit time types, and 32- or 64-bit file lengths. The first numerical suffix (32 or 64) indicates the size of the time type used; the second suffix is either i32 or i64, indicating whether the file size is represented as a 32-bit or 64-bit integer.

In Visual C++ 2005, _stat is equivalent to _stat64i32, and struct _stat contains a 64-bit time. This is true unless _USE_32BIT_TIME_T is defined, in which case the old behavior is in effect; _stat uses a 32-bit time, and struct _stat contains a 32-bit time. The same is true for _stati64.

This function validates its parameters. If either path or buffer is NULL, the invalid parameter handler is invoked, as described in Parameter Validation.

Time Type and File Length Type Variations of _stat
Functions _USE_32BIT_TIME_T defined? Time type File length type

_stat, _wstat

Not defined

64-bit

32-bit

_stat, _wstat

Defined

32-bit

32-bit

_stat32, _wstat32

Not affected by the macro definition

32-bit

32-bit

_stat64, _wstat64

Not affected by the macro definition

64-bit

64-bit

_stati64, _wstati64

Not defined

64-bit

64-bit

_stati64, _wstati64

Defined

32-bit

64-bit

_stat32i64, _wstat32i64

Not affected by the macro definition

32-bit

64-bit

_stat64i32, _wstat64i32

Not affected by the macro definition

64-bit

32-bit

Generic-Text Routine Mappings
TCHAR.H routine _UNICODE & _MBCS not defined _MBCS defined _UNICODE defined

_tstat

_stat

_stat

_wstat

_tstat64

_stat64

_stat64

_wstat64

_tstati64

_stati64

_stati64

_wstati64

_tstat32i64

_stat32i64

_stat32i64

_wstat32i64

_tstat64i32

_stat64i32

_stat64i32

_wstat64i32

The _stat structure, defined in SYS\STAT.H, includes the following fields.

st_gid

Numeric identifier of group that owns the file (UNIX-specific) This field will always be zero on Windows systems. A redirected file is classified as a Windows file.

st_atime

Time of last access of file. Valid on NTFS but not on FAT formatted disk drives.

st_ctime

Time of creation of file. Valid on NTFS but not on FAT formatted disk drives.

st_dev

Drive number of the disk containing the file (same as st_rdev).

st_ino

Number of the information node (the inode) for the file (UNIX-specific). On UNIX file systems, the inode describes the file date and time stamps, permissions, and content. When files are hard-linked to one another, they share the same inode. The inode, and therefore st_ino, has no meaning in the FAT, HPFS, or NTFS file systems.

st_mode

Bit mask for file-mode information. The _S_IFDIR bit is set if path specifies a directory; the _S_IFREG bit is set if path specifies an ordinary file or a device. User read/write bits are set according to the file's permission mode; user execute bits are set according to the filename extension.

st_mtime

Time of last modification of file.

st_nlink

Always 1 on non-NTFS file systems.

st_rdev

Drive number of the disk containing the file (same as st_dev).

st_size

Size of the file in bytes; a 64-bit integer for variations with the i64 suffix.

st_uid

Numeric identifier of user who owns file (UNIX-specific). This field will always be zero on Windows systems. A redirected file is classified as a Windows file.

If path refers to a device, the st_size, various time fields, st_dev, and st_rdev fields in the _stat structure are meaningless. Because STAT.H uses the _dev_t type that is defined in TYPES.H, you must include TYPES.H before STAT.H in your code.

Requirements

Routine Required header Optional headers Compatibility

_stat, _stat32, _stat64, _stati64, _stat32i64, _stat64i32

<sys/types.h> followed by <sys/stat.h>

<errno.h>

Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003

_wstat, _wstat32, _wstat64, _wstati64, _wstat32i64, _wstat64i32

<sys/types.h> followed by <sys/stat.h> or <wchar.h>

<errno.h>

Windows NT 4.0, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003

For additional compatibility information, see Compatibility in the Introduction.

Example

 Copy Code
// 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( void )
{
   struct _stat buf;
   int result;
   char timebuf[26];
   char* filename = "crt_stat.c";
   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.");
         exit(1);
      }
      printf( "Time modified : %s", timebuf );
   }
}

Sample Output

 
File size     : 732
Drive         : C:
Time modified : Thu Feb 07 14:39:36 2002

.NET Framework Equivalent

See Also

Reference

File Handling
_access, _waccess
_fstat, _fstat32, _fstat64, _fstati64, _fstat32i64, _fstat64i32
_getmbcp
_setmbcp