+val validPasswd = CharVector.all (fn ch => Char.isAlphaNum ch
+ orelse ch = #"!"
+ orelse ch = #"."
+ orelse ch = #"-"
+ orelse ch = #"_")
+
+fun adduser {user, passwd} =
+ case passwd of
+ NONE => SOME "No password given"
+ | SOME passwd =>
+ if validPasswd passwd then
+ if Slave.shell [Config.MySQL.adduser, user, " ", passwd] then
+ NONE
+ else
+ SOME "Error executing CREATE USER script"
+ else
+ SOME "Password contains characters besides letters, digits, and !.-_"
+
+fun passwd {user, passwd} =
+ if validPasswd passwd then
+ if Slave.shell [Config.MySQL.passwd, user, " ", passwd] then
+ NONE
+ else
+ SOME "Error executing SET PASSWORD script"