6.2 File Access Modes

GoFiler Legato Script Reference

Legato v 1.5b

Application v 5.24b

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Chapter Six — File Functions (continued)

6.2 File Access Modes

6.2.1 Access Modes

At the lowest level, Legato negotiates with the operating system to request file access permissions. Generally, under Windows, files are accessed as read or write with or without sharing. When sharing files, the allowed permissions must be set for other programs or users that may access the targeted file.

In addition to the above, each user group, folder and file may have securities settings and access rights that will impact the ability to script to access the data.

6.2.2 File Mode Codes

The following bits are used on various open and create operations:

Define		Bitwise Value	Description
Access Modes
	FO_READ	0x00000000	Read-Only (default)
	FO_WRITE	0x00000001	Read and Write Access
	FO_WANT_OVERLAPPED	0x00000004	Want Overlapped I/O
	FO_WANT_ATTRIBUTES	0x00000008	Want Attributes Changes
	FO_SHARE_READ	0x00000010	Allow Others to Open as Read
	FO_SHARE_WRITE	0x00000020	Allow Others to Open as Write
	FO_TEMP_FILE	0x00010001	Create/Delete Temporary File
	FO_DELAY_CREATE	0x00020001	Create Only, Delay on Share
	FO_CREATE_HIDDEN	0x00080000	Make Hidden on Create
	FO_ICM_EXCLUDE	0x00100000	Delete, Do Not Call ICM
	FO_WAIT_OPEN	0x00200000	Delay on Share (OpenFile only)
	FO_ALLOW_INHERIT_HANDLE	0x00400000	Set Security Descriptor to Inherit
	FO_FORCE_SPOOL	0x00800000	Forces Spool Out (requires create or FO_WRITE)
Applies to Some Operations
	FO_DO_NOT_CORRECT_NAME	0x10000000	Will Not Correct 8.3/Path Issues
	FO_NO_HTTP_CACHE	0x40000000	No Cache Request on HTTP Load
	FO_NO_ERROR_REPORT	0x80000000	Return Errors, No Message Box
Additional Modes
	FO_DELAY_FLAG	0x00020000	Delay on Share Error, Waits and Retries

Bits can be OR’d together for various effects. Some functions, such as CreateFile, will, by default, set FO_WRITE.

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