Navigation: Language Reference > App E - Legacy Statements >====== SHARE (open data file for shared access)  ====== |    |
SHARE(file [,access mode])
| SHARE | Opens a FILE structure for processing. |
| file | The label of a FILE declaration. |
| access mode | A numeric constant, variable, or expression which determines the level of access granted to both the user opening the file, and other users in a multi-user system. If omitted, the default value is 42h (Read/Write, Deny None). |
The SHARE statement opens a FILE structure for processing and sets the access mode. The SHARE statement is exactly the same as the OPEN statement, with the exception of the default value of access mode.
The access mode is a bitmap which tells the operating system what access to grant the user opening the file and what access to deny to others using the file.
The actual values for each access level are:
Dec. Hex. Access
User Access: 0 0h Read Only
1 1h Write Only
2 2h Read/Write
Others Access: 0 0h Any Access (FCB compatibility mode)
16 10h Deny All
32 20h Deny Write
48 30h Deny Read
64 40h Deny None
Errors Posted: The same set of errors that may be posted by OPEN
Example:
ReadOnly EQUATE(0) !Access mode equates
WriteOnly EQUATE(1)
ReadWrite EQUATE(2)
DenyAll EQUATE(10h)
DenyWrite EQUATE(20h)
DenyRead EQUATE(30h)
DenyNone EQUATE(40h)
CODE
SHARE(Master,ReadOnly+DenyWrite) !Open read only mode
See Also: