FSTAT

インテル® Fortran コンパイラー 19.0 デベロッパー・ガイドおよびリファレンス

Portability Function: Returns detailed information about a file specified by a external unit number.

Module

USE IFPORT

result = FSTAT (lunit,statb)

lunit

(Input) INTEGER(4). External unit number of the file to examine.

statb

(Output) INTEGER(4) or INTEGER(8). One-dimensional array of size 12; where the system information is stored. The elements of statb contain the following values:

Element	Description	Values or Notes
statb(1)	Device the file resides on	WS: Always 0 LX: System dependent
statb(2)	File inode number	WS: Always 0 LX: System dependent
statb(3)	Access mode of the file	See the table in Results
statb(4)	Number of hard links to the file	WS: Always 1 LX: System dependent
statb(5)	User ID of owner	WS: Always 1 LX: System dependent
statb(6)	Group ID of owner	WS: Always 1 LX: System dependent
statb(7)	Raw device the file resides on	WS: Always 0 LX: System dependent
statb(8)	Size of the file
statb(9)	Time when the file was last accessed¹	WS: Only available on non-FAT file systems; undefined on FAT systems LX: System dependent
statb(10)	Time when the file was last modified¹
statb(11)	Time of last file status change¹	WS: Same as stat(10) LX: System dependent
statb(12)	Blocksize for file system I/O operations	WS: Always 1 LX: System dependent
¹Times are in the same format returned by the TIME function (number of seconds since 00:00:00 Greenwich mean time, January 1, 1970).

Results

The result type is INTEGER(4). The result is zero if successful; otherwise, returns an error code equal to EINVAL (lunit is not a valid unit number, or is not open).

The access mode (the third element of statb) is a bitmap consisting of an IOR of the following constants:

Symbolic name	Constant	Description	Notes
S_IFMT	O'0170000'	Type of file
S_IFDIR	O'0040000'	Directory
S_IFCHR	O'0020000'	Character special	Never set on Windows* systems
S_IFBLK	O'0060000'	Block special	Never set on Windows systems
S_IFREG	O'0100000'	Regular
S_IFLNK	O'0120000'	Symbolic link	Never set on Windows systems
S_IFSOCK	O'0140000'	Socket	Never set on Windows systems
S_ISUID	O'0004000'	Set user ID on execution	Never set on Windows systems
S_ISGID	O'0002000'	Set group ID on execution	Never set on Windows systems
S_ISVTX	O'0001000'	Save swapped text	Never set on Windows systems
S_IRWXU	O'0000700'	Owner's file permissions
S_IRUSR, S_IREAD	O'0000400'	Owner's read permission	Always true on Windows systems
S_IWUSR, S_IWRITE	O'0000200'	Owner's write permission
S_IXUSR, S_IEXEC	O'0000100'	Owner's execute permission	Based on file extension (.EXE, .COM, .CMD, or .BAT)
S_IRWXG	O'0000070'	Group's file permissions	Same as S_IRWXU on Windows systems
S_IRGRP	O'0000040'	Group's read permission	Same as S_IRUSR on Windows systems
S_IWGRP	O'0000020'	Group's write permission	Same as S_IWUSR on Windows systems
S_IXGRP	O'0000010'	Group's execute permission	Same as S_IXUSR on Windows systems
S_IRWXO	O'0000007'	Other's file permissions	Same as S_IRWXU on Windows systems
S_IROTH	O'0000004'	Other's read permission	Same as S_IRUSR on Windows systems
S_IWOTH	O'0000002'	Other's write permission	Same as S_IWUSR on Windows systems
S_IXOTH	O'0000001'	Other's execute permission	Same as S_IXUSR on Windows systems

STAT returns the same information as FSTAT, but accesses files by name instead of external unit number.

Example

USE IFPORT
integer(4) statarray(12), istat
OPEN (unit=1,file='datfile.dat')
ISTAT = FSTAT (1, statarray)
if (.NOT. istat) then
    print *, statarray
end if

FSTAT

Module

Results

Example

See Also