134 lines
5.4 KiB
Plaintext
134 lines
5.4 KiB
Plaintext
<!-- $XConsortium: DatToDaT.sgm /main/6 1996/09/08 20:21:36 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.MAN30.rsml.1">]]>
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<![ %CDE.C.XO; [<RefEntry Id="XCDI.MAN30.rsml.1">]]>
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<RefMeta>
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<RefEntryTitle>DtDtsDataToDataType</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>DtDtsDataToDataType</Function></RefName>
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<RefPurpose>get the data type for a set of data
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</RefPurpose>
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</RefNameDiv>
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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 Remap="ANSI">
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<FuncSynopsisInfo>#include <Dt/Dts.h>
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</FuncSynopsisInfo>
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<FuncDef>char <Function>*DtDtsDataToDataType</Function></FuncDef>
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<ParamDef>const char *<Parameter>filepath</Parameter></ParamDef>
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<ParamDef>const void *<Parameter>buffer</Parameter></ParamDef>
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<ParamDef>const int <Parameter>size</Parameter></ParamDef>
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<ParamDef>const struct stat *<Parameter>stat_buff</Parameter></ParamDef>
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<ParamDef>const char *<Parameter>link_path</Parameter></ParamDef>
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<ParamDef>const struct stat *<Parameter>link_stat_buff</Parameter></ParamDef>
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<ParamDef>const char *<Parameter>opt_name</Parameter></ParamDef>
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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>DtDtsDataToDataType</Function> function determines
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the data type of a set of data,
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based on the information given in the non-
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<SystemItem Class="Constant">NULL</SystemItem> pointer arguments to the function.
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The function gathers any additional information, if it is needed,
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to compensate for the
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<SystemItem Class="Constant">NULL</SystemItem> arguments.
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For example, if the
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<Emphasis>filepath</Emphasis> argument is given, but the
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<Emphasis>stat_buff</Emphasis> argument is
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<SystemItem Class="Constant">NULL</SystemItem> and a
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<Emphasis>stat_buff</Emphasis> value is required to determine the data type,
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<Function>DtDtsDataToDataType</Function> calls the
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<Function>stat</Function>(2) function to obtain the information.
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</Para>
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<Para>The
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<Emphasis>filepath</Emphasis> argument is the pathname of a file.
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</Para>
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<Para>The
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<Symbol Role="Variable">buffer</Symbol> argument
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is a pointer to the buffer of the data to be typed.
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</Para>
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<Para>The
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<Symbol Role="Variable">size</Symbol> argument
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is the size of the buffer in bytes.
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</Para>
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<Para>The
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<Emphasis>stat_buff</Emphasis> argument
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is the buffer returned from a
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<Function>stat</Function>(2) or
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<Function>fstat</Function>(3) call for use in typing.
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</Para>
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<Para>The
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<Emphasis>link_path</Emphasis> argument
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is the pathname of the target file pointed to by a symbolic link.
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</Para>
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<Para>The
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<Emphasis>link_stat_buff</Emphasis> argument
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is the buffer returned from an
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<Function>lstat</Function>(2) call for use in typing.
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</Para>
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<Para>The
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<Emphasis>opt_name</Emphasis> argument can be used to specify a name to be associated with the buffer.
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If the
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<Emphasis>opt_name</Emphasis> argument is not
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<SystemItem Class="Constant">NULL</SystemItem>, it is used as a pseudo file name in typing;
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otherwise, certain attributes may be returned as
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<SystemItem Class="Constant">NULL</SystemItem> because the filename components could not be determined.
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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>DtDtsDataToDataType</Function> function returns a pointer to a data type string, or
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<SystemItem Class="Constant">NULL</SystemItem> if no value could be determined.
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</Para>
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</RefSect1>
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<RefSect1>
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<Title>APPLICATION USAGE</Title>
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<Para>The
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<Function>DtDtsDataToDataType</Function> function is generally used by applications such as file managers
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to improve performance.
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Typical applications should probably use
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&cdeman.DtDtsFileToDataType; or
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&cdeman.DtDtsBufferToDataType; instead.
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</Para>
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<Para>The
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<Emphasis>DtDtsBuffer</Emphasis>* functions assume that the buffer is readable and writable
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by the user, group and other file classes
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and select a type accordingly.
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An application requiring a type based on read-only
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permissions should use
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<Function>DtDtsDataToDataType</Function> with a
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<Emphasis>stat_buff</Emphasis> value created for this purpose:
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all fields should
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<SystemItem Class="Constant">NULL</SystemItem> except for the
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<Emphasis>st_mode</Emphasis> field,
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which should be set to:
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</Para>
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<InformalExample Remap="indent">
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<ProgramListing>S_IFREG | S_IROTH | S_IRGRP | S_IRUSR
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</ProgramListing>
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</InformalExample>
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</RefSect1>
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<RefSect1>
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<Title>SEE ALSO</Title>
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<Para><Filename Role="Header">Dt/Dts.h</Filename>, &cdeman.DtDtsLoadDataTypes;, &cdeman.DtDtsFileToDataType;, <![ %CDE.C.CDE; [&cdeman.DtDtsBufferToDataType;, <Function>fstat</Function>(3), <Function>lstat</Function>(2), <Function>stat</Function>(2). ]]><![ %CDE.C.XO; [&cdeman.DtDtsBufferToDataType;; <Function>fstat</Function>(3), <Function>lstat</Function>(2), <Function>stat</Function>(2) in the &str-ZK;.
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]]></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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