GETFILEINFOQQ

Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference

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ID 767251

Date 7/13/2023

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GETFILEINFOQQ

Portability Function: Returns information about the specified file. File names can contain wildcards (* and ?).

Module

USE IFPORT

result = GETFILEINFOQQ (files,buffer,handle)

files

(Input) Character*(*). Name or pattern of files you are searching for. Can include a full path and wildcards (* and ?).

buffer

(Output) Derived type FILE$INFO or derived type FILE$INFOI8. Information about a file that matches the search criteria in files.

The derived type FILE$INFO is defined in IFPORT.F90 as follows:

TYPE FILE$INFO
  INTEGER(4) CREATION             ! CREATION TIME (-1 on FAT)
  INTEGER(4) LASTWRITE            ! LAST WRITE TO FILE
  INTEGER(4) LASTACCESS           ! LAST ACCESS (-1 on FAT)
  INTEGER(4) LENGTH               ! LENGTH OF FILE
  INTEGER(4) PERMIT               ! FILE ACCESS MODE
  CHARACTER(255) NAME             ! FILE NAME
END TYPE FILE$INFO

The derived type FILE$INFOI8 is defined in IFPORT.F90 as follows:

TYPE FILE$INFOI8
  INTEGER(4) CREATION             ! CREATION TIME (-1 on FAT)
  INTEGER(4) LASTWRITE            ! LAST WRITE TO FILE
  INTEGER(4) LASTACCESS           ! LAST ACCESS (-1 on FAT)
  INTEGER(8) LENGTH               ! LENGTH OF FILE
  INTEGER(4) PERMIT               ! FILE ACCESS MODE
  CHARACTER(255) NAME             ! FILE NAME
END TYPE FILE$INFOI8

handle

(Input; output) INTEGER(4) on IA-32 architecture; INTEGER(8) on Intel® 64 architecture. Control mechanism. One of the following constants, defined in IFPORT.F90:

FILE$FIRST - First matching file found.
FILE$LAST - Previous file was the last valid file.
FILE$ERROR - No matching file found.

Results

The result type is INTEGER(4). The result is the nonblank length of the file name if a match was found, or 0 if no matching files were found.

To get information about one or more files, set the handle to FILE$FIRST and call GETFILEINFOQQ. This will return information about the first file which matches the name and return a handle. If the program wants more files, it should call GETFILEINFOQQ with the handle. GETFILEINFOQQ must be called with the handle until GETFILEINFOQQ sets handle to FILE$LAST, or system resources may be lost.

The derived-type element variables FILE$INFO%CREATION, FILE$INFO%LASTWRITE, and FILE$INFO%LASTACCESS contain packed date and time information that indicates when the file was created, last written to, and last accessed, respectively.

To break the time and date into component parts, call UNPACKTIMEQQ. FILE$INFO%LENGTH contains the length of the file in bytes. FILE$INFO%PERMIT contains a set of bit flags describing access information about the file as follows:

Bit flag	Access information for the file
FILE$ARCHIVE	Marked as having been copied to a backup device.
FILE$DIR	A subdirectory of the current directory. Each MS-DOS* directory contains two special files, "." and "..". These are directory aliases created by MS-DOS for use in relative directory notation. The first refers to the current directory, and the second refers to the current directory's parent directory.
FILE$HIDDEN	Hidden. It does not appear in the directory list you request from the command line, the Microsoft* visual development environment browser, or File Manager.
FILE$READONLY	Write-protected. You can read the file, but you cannot make changes to it.
FILE$SYSTEM	Used by the operating system.
FILE$VOLUME	A logical volume, or partition, on a physical disk drive. This type of file appears only in the root directory of a physical device.

You can use the constant FILE$NORMAL to check that all bit flags are set to 0. If the derived-type element variable FILE$INFO%PERMIT is equal to FILE$NORMAL, the file has no special attributes. The variable FILE$INFO%NAME contains the short name of the file, not the full path of the file.

If an error occurs, call GETLASTERRORQQ to retrieve the error message, such as:

ERR$NOENT: The file or path specified was not found.
ERR$NOMEM: Not enough memory is available to execute the command, the available memory has been corrupted, or an invalid block exists, indicating that the process making the call was not allocated properly.

Example

USE IFPORT
USE IFCORE
  CALL SHOWPERMISSION( )
END

! SUBROUTINE to demonstrate GETFILEINFOQQ
SUBROUTINE SHOWPERMISSION( )
USE IFPORT
  CHARACTER(80) files
  INTEGER(KIND=INT_PTR_KIND( )) handle
  INTEGER(4) length
  CHARACTER(5) permit
  TYPE (FILE$INFO) info
    WRITE (*, 900) ' Enter wildcard of files to view: '
    900 FORMAT (A, \)

    length = GETSTRQQ(files)
    handle = FILE$FIRST

    DO WHILE (.TRUE.)
      length = GETFILEINFOQQ(files, info, handle)
      IF ((handle .EQ. FILE$LAST) .OR. &
          (handle .EQ. FILE$ERROR)) THEN
         SELECT CASE (GETLASTERRORQQ( ))
           CASE (ERR$NOMEM)
             WRITE (*,*) 'Out of memory'
           CASE (ERR$NOENT)
             EXIT
           CASE DEFAULT
             WRITE (*,*) 'Invalid file or path name'
         END SELECT
      END IF

      permit = ' '
      IF ((info%permit .AND. FILE$HIDDEN) .NE. 0) &
         permit(1:1) = 'H'
      IF ((info%permit .AND. FILE$SYSTEM) .NE. 0) &
         permit(2:2) = 'S'
      IF ((info%permit .AND. FILE$READONLY) .NE. 0) &
         permit(3:3) = 'R'
      IF ((info%permit .AND. FILE$ARCHIVE) .NE. 0) &
         permit(4:4) = 'A'
      IF ((info%permit .AND. FILE$DIR) .NE. 0) &
         permit(5:5) = 'D'
      WRITE (*, 9000) info%name, info%length, permit
      9000 FORMAT (1X, A5, I9, ' ',A6)
    END DO
END SUBROUTINE

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