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access language


NAME · USAGE · PARAMETERS · DESCRIPTION · EXAMPLES · BUGS

NAME

access -- test whether a file exists

USAGE

bool = access (filename)

PARAMETERS

filename
The name of the file whose existence is to be tested.

DESCRIPTION

Access is a boolean intrinsic function returning true ("yes") if the named file exists. Access can only be called as a function in an expression, not as a task.

EXAMPLES

1. Type a file if it exists.

    if (access ("lib$motd"))
	type ("lib$motd")
    else
	error (11, "File not found")

2. Tell if a file exists.

cl> = access ("lib$motd")

BUGS

An optional second argument should be added to test whether the named file can be accessed for reading or writing.


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