checkAccess: Check file system access rights

In checkmate: Fast and Versatile Argument Checks

Check file system access rights

Description

Check file system access rights

Usage

checkAccess(x, access = "")

check_access(x, access = "")

assertAccess(x, access = "", .var.name = vname(x), add = NULL)

assert_access(x, access = "", .var.name = vname(x), add = NULL)

testAccess(x, access = "")

test_access(x, access = "")

expect_access(x, access = "", info = NULL, label = vname(x))

Arguments

x	[any] Object to check.
access	[character(1)] Single string containing possible characters ‘r’, ‘w’ and ‘x’ to force a check for read, write or execute access rights, respectively. Write and executable rights are not checked on Windows.
.var.name	[character(1)] Name of the checked object to print in assertions. Defaults to the heuristic implemented in vname.
add	[AssertCollection] Collection to store assertion messages. See AssertCollection.
info	[character(1)] Extra information to be included in the message for the testthat reporter. See expect_that.
label	[character(1)] Name of the checked object to print in messages. Defaults to the heuristic implemented in vname.

Value

Depending on the function prefix: If the check is successful, the functions assertAccess/assert_access return x invisibly, whereas checkAccess/check_access and testAccess/test_access return TRUE. If the check is not successful, assertAccess/assert_access throws an error message, testAccess/test_access returns FALSE, and checkAccess/check_access return a string with the error message. The function expect_access always returns an expectation.

See Also

Other filesystem: checkDirectoryExists(), checkFileExists(), checkPathForOutput()

Examples

# Is R's home directory readable?
testAccess(R.home(), "r")

# Is R's home directory writeable?
testAccess(R.home(), "w")

checkmate documentation built on Aug. 18, 2025, 5:36 p.m.