What I am after is the meaning of such type and what interface can use it. It is explained in Posix spec that devt is used for device IDs. However, what device id means for any object described by a path, which can be a file, a directy, a fifo or a physical device? BUILDERS CONST. Is located in Mandaue City, Cebu, Philippines and is part of the Engineering Services Industry. BUILDERS CONST. Has 273 total employees across all of its locations and generates 4.388794E-6 million in sales (USD). I hope you can help me. I have written a small project using CxxTest on my main dev machine. Everything works great on this machine, no problems. However, I tried setting up this project on my bran. Oct 10, 2015 Warning on compile #366. Closed ruggb opened this issue Oct 10, 2015 9 comments Closed Warning on compile #366. Ruggb opened this issue Oct 10, 2015 9 comments. 'warning: initialization from incompatible pointer type u8gdevt u8gdevrot =. A device ID is represented using the type devt. Given major and minor device IDs, makedev combines these to produce a device ID, returned as the function result.
-->Gets information about an open file.
Syntax
Parameters
fd
File descriptor of the open file.
File descriptor of the open file.
buffer
Pointer to the structure to store results.
Pointer to the structure to store results.
Return Value
Returns 0 if the file-status information is obtained. A return value of -1 indicates an error. If the file descriptor is invalid or buffer is NULL, the invalid parameter handler is invoked, as described in Parameter Validation. If execution is allowed to continue, errno is set to EBADF, in the case of an invalid file descriptor, or to EINVAL, if buffer is NULL.
Remarks
The _fstat function obtains information about the open file associated with fd and stores it in the structure pointed to by buffer. The _stat structure, defined in SYSStat.h, contains the following fields.
Field | Meaning |
---|---|
st_atime | Time of the last file access. |
st_ctime | Time of the creation of the file. |
st_dev | If a device, fd; otherwise 0. |
st_mode | Bit mask for file-mode information. The _S_IFCHR bit is set if fd refers to a device. The _S_IFREG bit is set if fd refers to an ordinary file. The read/write bits are set according to the file's permission mode. _S_IFCHR and other constants are defined in SYSStat.h. |
st_mtime | Time of the last modification of the file. |
st_nlink | Always 1 on non-NTFS file systems. |
st_rdev | If a device, fd; otherwise 0. |
st_size | Size of the file in bytes. |
If fd refers to a device, the st_atime, st_ctime, st_mtime, and st_size fields are not meaningful.
Because Stat.h uses the _dev_t type, which is defined in Types.h, you must include Types.h before Stat.h in your code.
_fstat64, which uses the __stat64 structure, allows file-creation dates to be expressed up through 23:59:59, December 31, 3000, UTC; whereas the other functions only represent dates through 23:59:59 January 18, 2038, UTC. Midnight, January 1, 1970, is the lower bound of the date range for all these functions.
Variations of these functions support 32-bit or 64-bit time types and 32-bit 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.
_fstat is equivalent to _fstat64i32, 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; _fstat uses a 32-bit time, and struct_stat contains a 32-bit time. The same is true for _fstati64.
By default, this function's global state is scoped to the application. To change this, see Global state in the CRT.
![Dev_t Dev_t](/uploads/1/2/6/0/126047866/312854346.png)
Time Type and File Length Type Variations of _stat
Functions | _USE_32BIT_TIME_T defined? | Time type | File length type |
---|---|---|---|
_fstat | Not defined | 64-bit | 32-bit |
_fstat | Defined | 32-bit | 32-bit |
_fstat32 | Not affected by the macro definition | 32-bit | 32-bit |
_fstat64 | Not affected by the macro definition | 64-bit | 64-bit |
_fstati64 | Not defined | 64-bit | 64-bit |
_fstati64 | Defined | 32-bit | 64-bit |
_fstat32i64 | Not affected by the macro definition | 32-bit | 64-bit |
_fstat64i32 | Not affected by the macro definition | 64-bit | 32-bit |
Requirements
Function | Required header |
---|---|
_fstat | <sys/stat.h> and <sys/types.h> |
_fstat32 | <sys/stat.h> and <sys/types.h> |
_fstat64 | <sys/stat.h> and <sys/types.h> |
_fstati64 | <sys/stat.h> and <sys/types.h> |
_fstat32i64 | <sys/stat.h> and <sys/types.h> |
_fstat64i32 | <sys/stat.h> and <sys/types.h> |
For more compatibility information, see Compatibility.
Example
See also
File Handling
_access, _waccess
_chmod, _wchmod
_filelength, _filelengthi64
_stat, _wstat Functions
_access, _waccess
_chmod, _wchmod
_filelength, _filelengthi64
_stat, _wstat Functions
Dev_t Type C
-->Get status information on a file.
Parameters
C Dev_t Type 2
- path
Pointer to a string containing the path of existing file or directory. - 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.
Note
If path contains the location of a directory, it cannot contain a trailing backslash. If it does, -1 will be returned and errno will be set to ENOENT.
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
![C dev_t type 2 C dev_t type 2](/uploads/1/2/6/0/126047866/479446630.png)
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.
_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.
Note
_wstat does not work with Windows Vista symbolic links. In these cases, _wstat will always report a file size of 0. _stat does work correctly with symbolic links.
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 | 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 Best photo library management software for mac. | _stat32i64 | _wstat32i64 |
_tstat64i32 Topaz jones arcade download torrent. | _stat64i32 | _stat64i32 | _wstat64i32 |
The _stat structure, defined in SYSSTAT.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.
C Dev_t Types
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 |
---|---|---|
_stat, _stat32, _stat64, _stati64, _stat32i64, _stat64i32 | <sys/types.h> followed by <sys/stat.h> | <errno.h> |
_wstat, _wstat32, _wstat64, _wstati64, _wstat32i64, _wstat64i32 | <sys/types.h> followed by <sys/stat.h> or <wchar.h> | <errno.h> |
For additional compatibility information, see Compatibility in the Introduction.