R: Get readonly status

is.readonly {ff} | R Documentation

## Get readonly status

### Description

Get readonly status of an ff object

### Usage

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

### Arguments

`x` | `x`
`...` | `...`

### 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.

### Value

logical scalar

### Author(s)

Jens Oehlschlägel

### See Also

`open.ff`, `physical`

### Examples

      x <- ff(1:12)
      is.readonly(x)
      close(x)
      open(x, readonly=TRUE)
      is.readonly(x)
      close(x)
      is.readonly(x)
      rm(x)

[Package ff version 2.2-13 Index]