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DEFINITION MODULE CFileSysOp ;
FROM SYSTEM IMPORT ADDRESS ;
(*
Description: provides access to filesystem operations.
The implementation module is written in C
and the parameters behave as their C
counterparts.
*)
TYPE
AccessMode = SET OF AccessStatus ;
AccessStatus = (F_OK, R_OK, W_OK, X_OK, A_FAIL) ;
PROCEDURE Unlink (filename: ADDRESS) : INTEGER ;
(*
Access - test access to a path or file. The behavior is
the same as defined in access(2). Except that
on A_FAIL is only used during the return result
indicating the underlying C access has returned
-1 (and errno can be checked).
*)
PROCEDURE Access (pathname: ADDRESS; mode: AccessMode) : AccessMode ;
(* Return TRUE if the caller can see the existance of the file or
directory on the filesystem. *)
(*
IsDir - return true if filename is a regular directory.
*)
PROCEDURE IsDir (dirname: ADDRESS) : BOOLEAN ;
(*
IsFile - return true if filename is a regular file.
*)
PROCEDURE IsFile (filename: ADDRESS) : BOOLEAN ;
(*
Exists - return true if pathname exists.
*)
PROCEDURE Exists (pathname: ADDRESS) : BOOLEAN ;
END CFileSysOp.
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