213 lines
8.3 KiB
Plaintext
213 lines
8.3 KiB
Plaintext
<!-- $XConsortium: dtsrinit.sgm 1996 -->
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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="CDE.SEARCH.DtSearchInit">]]>
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<refmeta><refentrytitle>DtSearchInit</refentrytitle>
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<manvolnum>library call</manvolnum></refmeta>
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<refnamediv>
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<refname><function>DtSearchInit</function></refname>
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<refpurpose>Initialize
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the DtSearch online API for subsequent calls</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<funcsynopsis>
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<funcsynopsisinfo>#include <Dt/Search.h></funcsynopsisinfo>
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<funcdef>int <function>DtSearchInit</function></funcdef>
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<paramdef>void <parameter>*argv0</parameter></paramdef>
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<paramdef>char <parameter>*userid</parameter></paramdef>
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<paramdef>long <parameter>switches</parameter></paramdef>
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<paramdef>char <parameter>*ocf_file</parameter></paramdef>
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<paramdef>FILE <parameter>*err_file</parameter></paramdef>
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<paramdef>char <parameter>***dbnames</parameter></paramdef>
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<paramdef>int <parameter>*dbcount</parameter></paramdef>
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</funcsynopsis></refsynopsisdiv><refsect1>
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<title>DESCRIPTION</title>
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<para><function>DtSearchInit</function> opens databases and other files and
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initializes the search engine API for subsequent requests. It must be
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the first online DtSearch function called.
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</para>
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<para><function>DtSearchInit</function> may be called only once, although
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<function>DtSrReinit</function> may be called at any time after
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<function>DtSearchInit</function>.
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</para>
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<para>If this function fails, the caller should display the MessageList returned
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and exit; no subsequent requests will be possible.
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</para>
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</refsect1>
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<refsect1>
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<title>ARGUMENTS</title>
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<variablelist>
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<varlistentry><term><symbol role="Variable">argv0</symbol></term>
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<listitem>
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<para>Specifies the program name to be assembled into usage, error, and debug
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messages from the API. It is intended to be the value of
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<symbol role="Variable">argv[0]</symbol> from <literal>main</literal>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><symbol role="Variable">userid</symbol></term>
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<listitem>
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<para>Specifies a 1- to 8-character name to use for log messages to distinguish between
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users and applications where multiple copies of the engine are running.
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</para>
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<para>If NULL, the first 8 characters of the <systemitem class="environvar">LOGNAME</systemitem> environment variable are used.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><symbol role="Variable">switches</symbol></term>
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<listitem>
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<para>Specifies a set of bit switches used principally to enable printing debugging
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statements and controlling <function>signal</function> registration.
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</para>
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<variablelist>
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<varlistentry><term><Symbol>DtSrInNOLOCALE</Symbol></term>
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<listitem>
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<para>Do not execute <function>setlocale</function> within <function>DtSearchInit</function>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><Symbol>DtSrInSIGNAL</Symbol></term>
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<listitem>
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<para>Register DtSearch abort signal handlers.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><Symbol>DtSrInENAB_NOHUP</Symbol></term>
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<listitem>
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<para>Reenable NOHUP for offline background programs. This is also the normal
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action unless <Symbol>DtSrInSIGNAL</Symbol> has been specified, in
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which case normal action is to abort on <Symbol>SIGHUP</Symbol>
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signal.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><Symbol>DtSrInIDEBUG</Symbol></term>
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<listitem>
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<para>Writes initialization trace messages
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to <symbol role="Variable">err_file</symbol>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><Symbol>DtSrInSDEBUG</Symbol></term>
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<listitem>
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<para>Writes query and search trace messages
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to <symbol role="Variable">err_file</symbol>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><Symbol>DtSrInRDEBUG</Symbol></term>
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<listitem>
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<para>Writes document retrieval trace messages
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to <symbol role="Variable">err_file</symbol>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><Symbol>DtSrInANY_DEBUG</Symbol></term>
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<listitem>
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<para>Equivalent to (<Symbol>DtSrInIDEBUG</Symbol> | <Symbol>DtSrInSDEBUG</Symbol> |<Symbol>DtSrInRDEBUG</Symbol>)
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><Symbol>DtSrInRDWR</Symbol></term>
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<listitem>
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<para>Opens database files for both read
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and write. The default is read-only.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>For example, to enable trace statements only for search and retrieval
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operations, pass <symbol role="Variable">switches</symbol> as (<Symbol>DtSrInSDEBUG</Symbol> | <Symbol>DtSrInRDEBUG</Symbol>). Pass zero for <symbol role="Variable">switches</symbol> for most normal API operations.</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><symbol role="Variable">ocf_file</symbol></term>
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<listitem>
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<para>Specifies the fully qualified path and base file name of the API ocf configuration
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file. If NULL, the initialization function looks for an <filename>ocf</filename>
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file with a base name of either <filename>dtsearch.ocf</filename> or
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<filename>austext.ocf</filename> in the directory specified by the <systemitem class="environvar">DTSROCFPATH</systemitem> environment variable, in the current working directory,
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or in the HOME directory, in that order. See &cdeman.dtsrocffile; for the format
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of an ocf file.</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><symbol role="Variable">err_file</symbol></term>
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<listitem>
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<para>Specifies a pointer to a previously opened text stream file where the API will write
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fatal error and debug trace messages. The normal value passed for
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<symbol role="Variable">err_file</symbol> is NULL, in which case such messages will
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be written to <filename>stderr</filename>.</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><symbol role="Variable">dbnames</symbol></term>
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<listitem>
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<para>Specifies an address where a pointer to an array of static database name string
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pointers will be placed. Each string identifies a single database successfully
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opened by this function.
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</para>
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<para>A database name string from this array will be used in most later API
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function calls.</para>
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<para>The <symbol role="Variable">dbn</symbol> member in
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<structname>DtSrResult</structname> is an index into this array.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><symbol role="Variable">dbcount</symbol></term>
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<listitem>
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<para>Specifies a pointer to the <StructName Role="typedef">int</StructName> where the size of the
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<symbol role="Variable">dbnames</symbol> array will be stored.
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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><refsect1>
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<title>RETURN VALUE</title>
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<para><function>DtSearchInit</function> returns <systemitem class="constant">DtSrOK</systemitem>, and possible messages on the
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MessageList, if the API is successfully initialized. It returns
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<systemitem class="constant">DtSrFAIL</systemitem> and messages on the
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MessageList if the API cannot be successfully initialized.
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</para>
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</refsect1><refsect1>
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<title>ENVIRONMENT VARIABLES</title>
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<variablelist>
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<varlistentry><term><systemitem class="environvar">LOGNAME</systemitem></term>
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<listitem>
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<para>First 8 characters are used for <symbol role="Variable">userid</symbol>
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if that argument is not passed.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><systemitem class="environvar">DTSROCFPATH</systemitem></term>
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<listitem>
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<para>Specifies a directory where the API
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configuration <filename>ocf</filename> file may be located. Used in lieu
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of specifying the <symbol role="Variable">ocf_file</symbol> argument.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><systemitem class="environvar">HOME</systemitem></term>
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<listitem>
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<para>Specifies an alternative directory
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in which to look for the ocf file if the <symbol role="Variable">ocf_file</symbol>
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argument is not passed, if the <systemitem class="environvar">DTSROCFPATH</systemitem> environment variable is not specified, or if the ocf file is
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not found either in the <systemitem class="environvar">DTSROCFPATH</systemitem>
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directory or in the current working directory.
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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>SEE ALSO</title>
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<para>&cdeman.DtSrAPI;,
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&cdeman.DtSearchReinit;,
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&cdeman.DtSearchGetMessages;,
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&cdeman.dtsrocffile;,
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&cdeman.DtSearch;
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</para>
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</refsect1></refentry>
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