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The following tables list the various CA-Clipper commands and functions that open or create files.
Note "R/W" means read/write, and "Ro" means read-only.

Commands that open one file

	Open mode for file		Current
	Sharing	Access	DBF is...

`append ... from <FILE> ...`	shared	Ro	written to
`copy to <FILE> ...`	exclusive	R/W	read from
`copy structure ... to <FILE>`	exclusive	R/W	read from
`copy to <FILE> structure extended`	exclusive	R/W	read from
`create <FILE>`	exclusive	R/W	not used
`display ... to <FILE>`	exclusive	R/W	read from
`index on ... to <FILE>`	exclusive	R/W	read from
`join with <ALIAS> to <FILE> ...`	exclusive	R/W	read from
`list ... to file <FILE>`	exclusive	R/W	read from
`restore from <FILE> ...`	shared	Ro	not used
`save to <FILE> ...`	exclusive	R/W	not used
`set alternate to <FILE>`	exclusive	R/W	not used
`set printer to <FILE>`	exclusive	R/W	not used
`sort ... to <FILE>`	exclusive	R/W	read from
`text ... to file <FILE> ...`	exclusive	R/W	not used
`total on ... to <FILE> ...`	exclusive	R/W	read from

Commands that open two files

	Open mode for file		Current
	Sharing	Access	DBF is...

`copy file <FILE1>`	shared	Ro	not used
`to <FILE2>`	exclusive	R/W
`create <FILE1>`	exclusive	R/W	not used
`from <FILE2> (if exclusive on)`	exclusive	R/W
`(if exclusive off)`	shared	R/W
`label form <FILE1>`	shared	Ro	read from
`to file <FILE2>`	exclusive	R/W
`report form <FILE1>`	shared	Ro	read from
`to file <FILE2>`	exclusive	R/W
`type <FILE1>`	shared	Ro	not used
`to file <FILE2>`	exclusive	R/W

Commands that open multiple files

	Open mode for file		Current
	Sharing	Access	DBF is...

`set index to <FILE LIST>`	identical to the open mode of the current DBF		not used
`use <FILE> (if exclusive on)`	exclusive	R/W	not used
`(if exclusive off)`	shared	R/W
`index <FILE LIST>`	identical to the open mode of <FILE>

Functions that open one file

	Open mode for file		Current
	Sharing	Access	DBF is...

`fopen(<FILE> [,<OPEN MODE>])`	varies	varies	not used
`memoread(<FILE>)`	shared	Ro	not used
`memowrit(<FILE>)`	exclusive	R/W	not used