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4.5 KiB
HTML
<!--$Id: db_err.so,v 10.11 1999/12/20 08:52:27 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->err</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->err</h1>
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</td>
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<td width="1%">
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<a href="../api_c/c_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.h>
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<p>
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void
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DBENV->err(DB_ENV *dbenv, int error, const char *fmt, ...);
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<p>
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void
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DBENV->errx(DB_ENV *dbenv, const char *fmt, ...);
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<p>
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void
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DB->err(DB *db, int error, const char *fmt, ...);
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<p>
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void
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DB->errx(DB *db, const char *fmt, ...);
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</pre></h3>
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<h1>Description</h1>
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<p>The DBENV->err, DBENV->errx, DB->err and
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DB->errx functions provide error messaging functionality for
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applications written using the Berkeley DB library.
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<p>The DBENV->err function constructs an error message consisting of the
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following elements:
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<p><blockquote><p><dl compact>
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<p><dt>An optional prefix string<dd>If no error callback function has been set using the
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<a href="../api_c/env_set_errcall.html">DBENV->set_errcall</a> function, any prefix string specified using the
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<a href="../api_c/env_set_errpfx.html">DBENV->set_errpfx</a> function, followed by two separating characters: a colon
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and a <space> character.
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<p><dt>An optional printf-style message<dd>The supplied message <b>fmt</b>, if non-NULL, where the ANSI C X3.159-1989 (ANSI C)
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printf function specifies how subsequent arguments are converted for
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output.
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<p><dt>A separator<dd>Two separating characters: a colon and a <space> character.
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<p><dt>A standard error string<dd>The standard system or Berkeley DB library error string associated with the
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<b>error</b> value, as returned by the <a href="../api_c/env_strerror.html">db_strerror</a> function.
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</dl>
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</blockquote>
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<p>This constructed error message is then handled as follows:
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<p><blockquote>
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<p>If an error callback function has been set (see <a href="../api_c/db_set_errcall.html">DB->set_errcall</a>
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and <a href="../api_c/env_set_errcall.html">DBENV->set_errcall</a>), that function is called with two
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arguments: any prefix string specified (see <a href="../api_c/db_set_errpfx.html">DB->set_errpfx</a> and
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<a href="../api_c/env_set_errpfx.html">DBENV->set_errpfx</a>), and the error message.
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<p>If a C library FILE * has been set (see <a href="../api_c/db_set_errfile.html">DB->set_errfile</a> and
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<a href="../api_c/env_set_errfile.html">DBENV->set_errfile</a>), the error message is written to that output
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stream.
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<p>If none of these output options has been configured, the error message
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is written to stderr, the standard error output stream.</blockquote>
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<p>The DBENV->errx and DB->errx functions perform identically to the
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DBENV->err and DB->err functions except that they do not append
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the final separator characters and standard error string to the error
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message.
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<h1>See Also</h1>
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<a href="../api_c/env_close.html">DBENV->close</a>,
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<a href="../api_c/env_create.html">db_env_create</a>,
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<a href="../api_c/env_open.html">DBENV->open</a>,
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<a href="../api_c/env_remove.html">DBENV->remove</a>,
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<a href="../api_c/db_err.html">DBENV->err</a>,
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<a href="../api_c/env_strerror.html">db_strerror</a>,
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<a href="../api_c/env_version.html">db_version</a>,
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<a href="../api_c/env_set_cachesize.html">DBENV->set_cachesize</a>,
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<a href="../api_c/env_set_errcall.html">DBENV->set_errcall</a>,
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<a href="../api_c/env_set_errfile.html">DBENV->set_errfile</a>,
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<a href="../api_c/env_set_errpfx.html">DBENV->set_errpfx</a>,
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<a href="../api_c/env_set_flags.html">DBENV->set_flags</a>,
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<a href="../api_c/env_set_mutexlocks.html">DBENV->set_mutexlocks</a>,
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<a href="../api_c/env_set_paniccall.html">DBENV->set_paniccall</a>,
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and
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<a href="../api_c/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_c/c_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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