user { "psareel":
        ensure  => "present",
        uid     => "37692",
        gid     => "1",
	password => "OBUxaTBWqPKf.",
        comment => "Pt Sareel",
        home    => "/home/psareel",
        shell   => "/usr/local/bin/bash",
    }

run this with something like
	echo | ./shadow.awk
	./shadow.awk <<< ""


#!/usr/bin/awk -f

BEGIN {
  passwd_file="/etc/passwd"
  shadow_file="shadow"
  FS=":"
}

{
  while (getline passwd < passwd_file) {
    if (split(passwd, passwd_array, ":") != 7) {
      print "problems reading passwd file"
      exit
    }

    user=passwd_array[1]
    uid=passwd_array[3]
    gid=passwd_array[4]
    comment=passwd_array[5]
    home=passwd_array[6]
comment => "PolicyKit,,,",
home => "/var/run/PolicyKit",
    shell=passwd_array[7]

    while (getline shadow < shadow_file) {
      if (split(shadow, shadow_array, ":") != 9) {
        print "problems reading shadow file"
        exit
      }

      if (shadow_array[1] == user) {
        password=shadow_array[2]
        break
      }
    }

    record=sprintf("user { \"%s\":\n", user)
    record=record "ensure => \"present\",\n"
    record=record sprintf("uid => \"%s\",\n", uid)
    record=record sprintf("gid => \"%s\",\n", gid)
    record=record sprintf("password => \"%s\",\n", password)
    record=record sprintf("comment => \"%s\",\n", comment)
    record=record sprintf("home => \"%s\",\n", home)
    record=record sprintf("shell => \"%s\",\n", shell)
    record=record "}\n"
    print record
  }
}