OSF DCE Administration Guide--Core Components

OSF DCE Administration Guide—Core Components

• The string binding for the host where the server resides. String bindings can

represent security servers, DTS servers, and audit daemons. They cannot represent

CDS servers. An example of a string binding is {ncacn_ip_tcp 110.15.22.131}. The

DCE control program resolves the binding to the appropriate service on the host.

• The name of the cell. This form applies only to registry operations. For a remote

cell, specify a global cell name, for example /.../my_cell.goodco.com. For the local

cell you can specify the root as /.:. These operations use an arbitrary server that is

suitable for the operation.

2.6.9 Last Security Server Used (_b(sec))

The _b(sec) convenience variable holds the name of the security server used for the most

recent registry operation. The DCE control program sets this variable based on previous

registry operations. Consequently, users can view, but not set, this variable.

One reason to read the value of this variable is to check which registry performed the

most recent operation as shown in the following example:

dcecp> puts $_b(sec)

/.../my_cell.goodco.com/subsys/dce/sec/master

dcecp>

Registry operations use the value of the _b(sec) variable in conjunction with the value of

the _s(sec) variable to determine which security server to use. Refer to Section 2.6.8 for

information about the _s(sec) variable and how these values work together for registry

operations.

2.7 Measuring and Counting with Expressions

The expr command offers ﬂexible ways to express and use arithmetic functions in your

scripts. Expressions are useful for things like comparing numeric information such as the

number of elements in a list, setting thresholds for monitoring purposes, incrementing

counters that control your script’s execution, and producing statistical information.

A simple dcecp expression is a combination of an operator like + (add) or * (multiply)

and some operands. The expr command takes one argument—the expression—so

parentheses or braces may be needed if your expression has spaces. Use parentheses to

control grouping in expressions. Expressions can also be nested. All of the following

are valid expressions:

dcecp> expr {2 + 3}

dcecp> expr 2+3

dcecp> set x 24

2− 14 Tandem Computers Incorporated 124243