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<!-- (c) Copyright 1995 Digital Equipment Corporation. -->
<!-- (c) Copyright 1995 Hewlett-Packard Company. -->
<!-- (c) Copyright 1995 International Business Machines Corp. -->
<!-- (c) Copyright 1995 Sun Microsystems, Inc. -->
<!-- (c) Copyright 1995 Novell, Inc. -->
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<RefMeta>
<RefEntryTitle>Get_Modified</RefEntryTitle>
<ManVolNum>special file</ManVolNum>
</RefMeta>
<RefNameDiv>
<RefName><Symbol Role="Message">Get_Modified</Symbol></RefName>
<RefPurpose>ask whether an entity has been modified
</RefPurpose>
</RefNameDiv>
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<!-- (c) Copyright 1993, 1994, 1995 Hewlett-Packard Company-->
<!-- (c) Copyright 1993, 1994, 1995 International Business Machines Corp.-->
<!-- (c) Copyright 1993, 1994, 1995 Sun Microsystems, Inc.-->
<!-- (c) Copyright 1993, 1994, 1995 Novell, Inc.-->
<RefSynopsisDiv>
<Synopsis>[<Symbol Role="Variable">file</Symbol>] Get_Modified(in <Emphasis>type ID</Emphasis>,
        out boolean <Emphasis>modified</Emphasis>);
</Synopsis>
</RefSynopsisDiv>
<RefSect1>
<Title>DESCRIPTION</Title>
<Para>The
<Symbol Role="Message">Get_Modified</Symbol> request
asks whether any tool has modified a volatile,
non-shared (for example, in-memory) representation of the persistent
state of an entity (such as a file) with the intention of
eventually making that representation persistent.
</Para>
<Para>Thus, a tool should register a dynamic pattern for this request
when it has modified an entity of possible shared interest.
</Para>
<Para>The
<Emphasis>ID</Emphasis> argument is the identity of the persistent entity being asked about.
When its
<Symbol Role="Variable">type</Symbol> is
<Literal>File</Literal>, then
<Emphasis>ID</Emphasis> is unset (in other words, has a value of
<Literal>(char *)0</Literal>), and it refers to the file or directory
named in the message's file attribute.
</Para>
<Para>The
<Emphasis>modified</Emphasis> argument
argument is a
Boolean value indicating whether a volatile, non-shared
(for example, in-memory) representation of the entity has been
modified with the intention of eventually making that
representation persistent.
</Para>
</RefSect1>
<RefSect1>
<Title>ERRORS</Title>
<Para>The ToolTalk service may return one of the following errors
in processing the
<Symbol Role="Message">Get_Modified</Symbol> request:
</Para>
<VariableList>
<VarListEntry>
<Term>TT_ERR_NO_MATCH</Term>
<ListItem>
<Para>Since no handler could be found, the entity in question can be assumed
not to be modified.
</Para>
</ListItem>
</VarListEntry>
</VariableList>
</RefSect1>
<RefSect1>
<Title>APPLICATION USAGE</Title>
<Para>The
&cdeman.ttdt.file.join;, function
can be used to register for,
and transparently process, the
<Symbol Role="Message">Get_Modified</Symbol> request.
</Para>
<Para>The
<Symbol Role="Message">Get_Modified</Symbol> request can be sent with
&cdeman.ttdt.file.request;; &cdeman.ttdt.Get.Modified;, can send the
<Symbol Role="Message">Get_Modified</Symbol> request and block on the reply.
</Para>
</RefSect1>
<RefSect1>
<Title>SEE ALSO</Title>
<Para>&cdeman.ttdt.file.join;, &cdeman.ttdt.file.request;, &cdeman.ttdt.file.request;, &cdeman.ttdt.Get.Modified;; <Emphasis>Set_Modified</Emphasis> request.
</Para>
</RefSect1>
</RefEntry>
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