107 lines
3.1 KiB
Plaintext
107 lines
3.1 KiB
Plaintext
<!-- $XConsortium: fd.sgm /main/5 1996/08/30 12:45:42 rws $ -->
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<!-- (c) Copyright 1995 Digital Equipment Corporation. -->
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<!-- (c) Copyright 1995 Hewlett-Packard Company. -->
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<!-- (c) Copyright 1995 International Business Machines Corp. -->
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<!-- (c) Copyright 1995 Sun Microsystems, Inc. -->
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<!-- (c) Copyright 1995 Novell, Inc. -->
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<!-- (c) Copyright 1995 FUJITSU LIMITED. -->
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<!-- (c) Copyright 1995 Hitachi. -->
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<![ %CDE.C.CDE; [<RefEntry Id="CDEMX.XCDI.MAN69.rsml.1">]]>
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<![ %CDE.C.XO; [<RefEntry Id="XCDI.MAN69.rsml.1">]]>
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<RefMeta>
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<RefEntryTitle>tt_fd</RefEntryTitle>
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<ManVolNum>library call</ManVolNum>
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</RefMeta>
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<RefNameDiv>
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<RefName><Function>tt_fd</Function></RefName>
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<RefPurpose>return a file descriptor
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</RefPurpose>
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</RefNameDiv>
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<!-- $XConsortium: fd.sgm /main/5 1996/08/30 12:45:42 rws $-->
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<!-- CDE Common Source Format, Version 1.0.0-->
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<!-- (c) Copyright 1993, 1994, 1995 Hewlett-Packard Company-->
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<!-- (c) Copyright 1993, 1994, 1995 International Business Machines Corp.-->
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<!-- (c) Copyright 1993, 1994, 1995 Sun Microsystems, Inc.-->
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<!-- (c) Copyright 1993, 1994, 1995 Novell, Inc.-->
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<RefSynopsisDiv>
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<FuncSynopsis>
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<FuncSynopsisInfo>#include <Tt/tt_c.h>
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</FuncSynopsisInfo>
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<FuncDef>int <Function>tt_fd</Function></FuncDef>
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<void>
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</FuncSynopsis>
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</RefSynopsisDiv>
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<RefSect1>
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<Title>DESCRIPTION</Title>
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<Para>The
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<Function>tt_fd</Function> function
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returns a file descriptor.
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The returned file descriptor alerts the process that a message has
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arrived for the default
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procid
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in the default session.
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</Para>
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<Para>File descriptors are either active or inactive.
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When the file descriptor becomes
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active, the process must call
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&cdeman.tt.message.receive; to receive the message.
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</Para>
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</RefSect1>
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<RefSect1>
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<Title>RETURN VALUE</Title>
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<Para>Upon successful completion, the
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<Function>tt_fd</Function> function returns the file descriptor for the current
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procid.
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The application can use
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&cdeman.tt.int.error; to extract one of the following
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<StructName Role="typedef">Tt_status</StructName> values from the returned integer:
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</Para>
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<VariableList>
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<VarListEntry>
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<Term>TT_OK</Term>
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<ListItem>
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<Para>The operation completed successfully.
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</Para>
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</ListItem>
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</VarListEntry>
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<VarListEntry>
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<Term>TT_ERR_NOMP</Term>
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<ListItem>
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<Para>The
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&cdeman.ttsession; process is not running and the ToolTalk service cannot restart it.
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</Para>
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</ListItem>
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</VarListEntry>
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<VarListEntry>
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<Term>TT_ERR_PROCID</Term>
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<ListItem>
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<Para>The current default process identifier is out of date or invalid.
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</Para>
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</ListItem>
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</VarListEntry>
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<VarListEntry>
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<Term>TT_ERR_SESSION</Term>
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<ListItem>
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<Para>The specified ToolTalk session is out of date or invalid.
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</Para>
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</ListItem>
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</VarListEntry>
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</VariableList>
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</RefSect1>
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<RefSect1>
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<Title>APPLICATION USAGE</Title>
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<Para>The application must have a separate file descriptor for each
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procid.
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To get an
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associated file descriptor, the application should use
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<Function>tt_fd</Function> each time it calls
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&cdeman.tt.open;.</Para>
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</RefSect1>
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<RefSect1>
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<Title>SEE ALSO</Title>
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<Para>&cdeman.Tt.tt.c.h;, &cdeman.tt.open;, &cdeman.tt.int.error;, &cdeman.tt.message.receive;.</Para>
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</RefSect1>
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</RefEntry>
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<!--fickle 1.12 mancsf-to-docbook 1.2 08/07/95 23:18:47-->
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