Operating System File I/O [Revelation On-Line Wiki]

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====== Operating System File I/O ======

 

Operating system file input and output (I/O) commands provide direct access to operating system files. They include the capability to create, delete, and change data in these files. Use the Status function after these commands to report on the success or failure of their execution.

 

^Command^Description^
|[[copy_os_to_row|Copy_OS_To_Row routine]]|Copies one or more operating system files to a native table.|
|[[copy_row_to_os|Copy_Row_To_OS routine]]|Copies a row or a group of rows from one table to another.|
|[[dir|Dir()]]|Returns directory information about an operating system file.|
|[[dirlist|DirList()]]|Returns an array of operating system file names on the path established with InitDir.|
|[[drive|Drive()]]|Returns the current operating system path.|
|[[initdir|InitDir statement]]|Establishes a path and file mask for use with DirList().|
|[[osbread|OSBRead statement]]|Reads a section of an operating system file into a variable. The programmer can specify the size of the section to be read, as well as the location in the operating system file from which the data is to be read.|
|[[osbwrite|OSBWrite statement]]|Writes data from a variable into a section of an operating system file.|
|[[osclose|OSClose statement]]|Closes an operating system file opened with a previous OSOpen.|
|[[osdelete|OSDelete statement]]|Deletes an operating system file.|
|[[osopen|OSOpen statement]]|Opens an operating system file for use with the OSBRead and OSBWrite statements.\\ \\ **Note:** Unlike OpenInsight files, operating system files must be closed (with the OSClose command).|
|[[osread|OSRead statement]]|Reads the entire contents of an operating system file into a variable.|
|[[oswrite|OSWrite statement]]|Writes the contents of a variable to a operating system file. If the file exists, it will be overwritten. If it does not exist, it will be created.|
|[[setinitdiroptions|SetInitDirOptions subroutine]]|Used to set attributes for the file mask used by the [[initdir|InitDir statement]] and [[dirlist|DirList function]].|