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77 lines
3.9 KiB
HTML
<!--$Id: env_set_errfile.so,v 10.17 1999/12/20 08:52:29 bostic Exp $-->
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<!--$Id: m4.errset,v 10.8 2000/02/19 20:57:57 bostic Exp $-->
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<!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.-->
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<!--All rights reserved.-->
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<html>
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<head>
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<title>Berkeley DB: DbEnv::set_errfile</title>
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<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
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<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++">
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</head>
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<body bgcolor=white>
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<a name="2"><!--meow--></a>
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<table><tr valign=top>
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<td>
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<h1>DbEnv::set_errfile</h1>
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</td>
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<td width="1%">
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<a href="../api_cxx/cxx_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
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</td></tr></table>
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<hr size=1 noshade>
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<tt>
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<h3><pre>
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#include <db_cxx.h>
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<p>
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void DbEnv::set_errfile(FILE *errfile);
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</pre></h3>
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<h1>Description</h1>
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When an error occurs in the Berkeley DB library, an exception is thrown or an
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error return value is returned by the method. In some cases,
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however, the <b>errno</b> value may be insufficient to completely
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describe the cause of the error, especially during initial application
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debugging.
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<p>The DbEnv::set_errfile method is used to enhance the mechanism for reporting error
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messages to the application by setting a C library FILE * to be used for
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displaying additional Berkeley DB error messages. In some cases, when an error
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occurs, Berkeley DB will output an additional error message to the specified
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file reference.
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<p>Alternatively, you can use the <a href="../api_cxx/env_set_error_stream.html">DbEnv::set_error_stream</a> method to display
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the additional information via an output stream, or the
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<a href="../api_cxx/env_set_errcall.html">DbEnv::set_errcall</a> method to capture the additional error information in
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a way that does not use either output streams or C library FILE *'s. You
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should not mix these approaches.
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<p>The error message will consist of the prefix string and a colon
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("<b>:</b>") (if a prefix string was previously specified using
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<a href="../api_cxx/db_set_errpfx.html">Db::set_errpfx</a> or <a href="../api_cxx/env_set_errpfx.html">DbEnv::set_errpfx</a>), an error string, and
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a trailing <newline> character.
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<p>This error logging enhancement does not slow performance or significantly
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increase application size, and may be run during normal operation as well
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as during application debugging.
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<p>The DbEnv::set_errfile interface may be used to configure Berkeley DB at any time
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during the life of the application.
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<h3>Class</h3>
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<a href="../api_cxx/dbenv_class.html">DbEnv</a>
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<h1>See Also</h1>
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<a href="../api_cxx/env_close.html">DbEnv::close</a>,
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<a href="../api_cxx/env_open.html">DbEnv::open</a>,
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<a href="../api_cxx/env_remove.html">DbEnv::remove</a>,
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<a href="../api_cxx/db_err.html">DbEnv::err</a>,
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<a href="../api_cxx/env_strerror.html">DbEnv::strerror</a>,
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<a href="../api_cxx/env_version.html">DbEnv::version</a>,
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<a href="../api_cxx/env_set_cachesize.html">DbEnv::set_cachesize</a>,
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<a href="../api_cxx/env_set_errcall.html">DbEnv::set_errcall</a>,
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<a href="../api_cxx/env_set_errfile.html">DbEnv::set_errfile</a>,
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<a href="../api_cxx/env_set_error_stream.html">DbEnv::set_error_stream</a>,
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<a href="../api_cxx/env_set_errpfx.html">DbEnv::set_errpfx</a>,
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<a href="../api_cxx/env_set_flags.html">DbEnv::set_flags</a>,
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<a href="../api_cxx/env_set_mutexlocks.html">DbEnv::set_mutexlocks</a>,
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<a href="../api_cxx/env_set_paniccall.html">DbEnv::set_paniccall</a>,
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and
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<a href="../api_cxx/env_set_verbose.html">DbEnv::set_verbose</a>.
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</tt>
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<table><tr><td><br></td><td width="1%">
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<a href="../api_cxx/cxx_index.html"><img src="../images/api.gif" alt="API"></a><a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a>
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