Minijail policy file duplicate checker (https://crrev.com/c/2633956)

minijail-policy-dup-checker.elv

fn list-syscalls [file]{
  cat $file | eawk [f syscall @rest]{ if (str:has-suffix $syscall ':') { put $syscall[:-1] } }
}

fn find-dups [list]{
  map = [&]
  for item $list {
    if (has-key $map $item) {
      put $item
    }
    map[$item] = $true
  }
}

fn check-all [@files]{
  for file $files {
    dups = [(find-dups [(list-syscalls $file)])]
    if (!= 0 (count $dups)) {
      echo $file 'has duplicates:' $dups
    }
  }
}