Lock folder in swift

The Locked checkbox in the Finder is implemented at the API level as the UF_IMMUTABLE flag in chflags (see its man page, although make sure to look at section 2 of the manual because section 1 has a similarly named page for the chflags tool). You can see this in Terminal:

% ls -ldO {un,}locked
drwxr-xr-x  2 quinn  staff  uchg 64  8 Nov 10:00 locked
drwxr-xr-x  2 quinn  staff  -    64  8 Nov 10:00 unlocked

Setting this from Swift is tricky because none of the standard high-level APIs (FileManager and URL) support this. The easiest option, IMO, is to call BSD directly. For example:

import Foundation

func main() {
    let u = URL(fileURLWithPath: "/Users/quinn/Test/unlocked")
    let success = chflags(u.path, CUnsignedInt(UF_IMMUTABLE)) >= 0
    if !success {
        let error = NSError(domain: NSPOSIXErrorDomain, code: Int(errno), userInfo: nil)
        print("failed, error: \(error)")
        return
    }
    print("success")
}

main()

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—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"

Thanks it was very useful