/usr/lib/ruby/vendor_ruby/specinfra/backend/powershell/support/check_file_access_rules.ps1 is in ruby-specinfra 2.35.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | function CheckFileAccessRules
{
param($path, $identity, $rules)
$accessRules = @((Get-Acl $path).access | Where-Object {$_.AccessControlType -eq 'Allow' -and $_.IdentityReference -eq $identity })
$match = @($accessRules | Where-Object {($_.FileSystemRights.ToString().Split(',') | % {$_.trim()} | ? {$rules -contains $_}) -ne $null})
$match.count -gt 0
}
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