ff (version 2.2-14)

is.readonly: Get readonly status

Description

Get readonly status of an ff object

Usage

is.readonly(x, …)
# S3 method for ff
is.readonly(x, …)

Arguments

x

x

Value

logical scalar

Details

ff objects can be created/opened with readonly=TRUE. After each opening of the ff file readonly status is stored in the physical attributes and serves as the default for the next opening. Thus querying a closed ff object gives the last readonly status.

See Also

open.ff, physical

Examples

Run this code
# NOT RUN {
  x <- ff(1:12)
  is.readonly(x)
  close(x)
  open(x, readonly=TRUE)
  is.readonly(x)
  close(x)
  is.readonly(x)
  rm(x)
# }

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