OSF DCE Administration Guide--Core Components

OSF DCE Administration Guide—Core Components

uplevel level arg arg arg

The uplevel command is similar to eval; it concatenates arguments and executes them as

scripts but, unlike eval, uplevel executes the script in the context speciﬁed by level

rather than the current context. The level argument works the same in uplevel as it does

in upvar. Use the parent’s context with a level argument of 1. Use the context of a

ﬁrst-level procedure with a level argument of #1 .

If a proc command speciﬁes a command name that is already in effect, the new

procedure replaces the existing procedure with the same name. Except in unusual cases,

you should avoid naming new commands so that they replace existing built-in

commands.

You can rename or delete Tcl commands by using the rename command. For instance,

you could temporarily rename list to list.old and then use proc to create another

command called list. When you’re through using the manufactured list command, you

could rename list old to list, restoring the original function of list as in the following:

rename list list.old

proc list {} {

}

rename list.old list

Delete a command by omitting the second argument to the rename command. The

following example deletes the list command:

rename list

2.13 String Manipulation

Many DCE administrative operations return information of some sort. For instance, the

principal show operation returns information about a principal. Usually this information

is in the form of a list, as in the following example:

dcecp> principal show R_Parsons

{fullname {}}

{uid 15}

{uuid 0000000f-d6f9-21cd-8d00-0000c08adf56}

{alias no}

{quota unlimited}

{groups users}

dcecp>

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