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<concept id="GUID-9A5D0303-6C22-53A1-86DA-0431F726010B" xml:lang="en"><title>Messaging

Dependencies</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>The following are the major dependencies of other subsystems on the Messaging

subsystem: </p>

<ul>

<li id="GUID-E2E94CC5-C780-5B7C-8DC9-9CC4D4FF5853"><p> <b>File server:</b> needs

to be able to clone open file handles. This allow processes to access files

in another process’s data cages area. </p> </li>

<li id="GUID-2FE4E644-AA53-524E-9420-419F19515CC5"><p> <b>Task scheduler:</b> needs

to store the capabilities of the process that creates a schedule within the

task information for that schedule. The task scheduler must data cage the

schedule information. </p> </li>

<li id="GUID-0BAF2FEE-3D7E-58DF-A159-8F5F47B3307E"><p> <b>Kernel:</b> a process

needs to be able to obtain the Secure ID (SID) (that is allocated by the kernel

to a process) and capabilities of the process that started it. </p> </li>

<li id="GUID-C5550F67-A0B1-5564-B83C-573EBB8A6DA5"><p> <b>Application Architecture:</b> ability

to launch an application by passing an open file handle that can then be used

by the launched application. </p> </li>

<li id="GUID-386D0E24-24C6-5464-88E4-517C821B26DA"><p> <b>Central repository:</b> ability

to assign different security capabilities to settings within a repository,

and to be able to guarantee committing multiple settings. This can be either

as APIs to set an array of settings or as APIs to store settings in memory

and provide a commit to disk API. </p> </li>

<li id="GUID-A169571C-CFCB-52E3-A820-3FAE33623C95"><p> <b>ESock:</b> hosts

the service-providing protocol modules and network interfaces. </p> </li>

<li id="GUID-931E092A-C043-51FA-BE78-136FCC849882"><p> <b>ETel:</b> a telephony

server to provide a generic interface to initiate, control, and terminate

telephone calls. </p> </li>

<li id="GUID-5947368C-87C3-54AA-B8C8-5C529CA25627"><p> <b>SQL:</b> a component

that provides an SQL database service. </p> </li>

</ul>

</conbody><related-links>

<link href="GUID-4CEB52EC-8F08-53B7-A900-AF163316D442.dita"><linktext>Messaging

Overview</linktext></link>

<link href="GUID-5E8AA6B6-38EB-5347-BA30-F9FF4BF7C107.dita#GUID-5E8AA6B6-38EB-5347-BA30-F9FF4BF7C107/GUID-10265557-F31B-50B3-A955-A548A5A78D7B">

<linktext>Operating with the SQL database</linktext></link>

</related-links></concept>