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<!--$Id: db_set_errfile.so,v 10.7 1999/12/20 08:52:28 bostic Exp $-->
<!--$Id: m4.errset,v 10.8 2000/02/19 20:57:57 bostic Exp $-->
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<h1>DB->set_errfile</h1>
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<h3><pre>
#include <db.h>
<p>
void
DB->set_errfile(DB *db, FILE *errfile);
</pre></h3>
<h1>Description</h1>
When an error occurs in the Berkeley DB library, a Berkeley DB error or an error
return value is returned by the function. In some cases, however,
the <b>errno</b> value may be insufficient to completely describe
the cause of the error especially during initial application debugging.
<p>The DB->set_errfile function is used to enhance the mechanism for reporting error
messages to the application by setting a C library FILE * to be used for
displaying additional Berkeley DB error messages. In some cases, when an error
occurs, Berkeley DB will output an additional error message to the specified
file reference.
<p>The error message will consist of the prefix string and a colon
("<b>:</b>") (if a prefix string was previously specified using
<a href="../api_c/db_set_errpfx.html">DB->set_errpfx</a> or <a href="../api_c/env_set_errpfx.html">DBENV->set_errpfx</a>), an error string, and
a trailing <newline> character.
<p>This error logging enhancement does not slow performance or significantly
increase application size, and may be run during normal operation as well
as during application debugging.
<p>For DB handles opened inside of Berkeley DB environments, calling the
DB->set_errfile function affects the entire environment and is equivalent to calling
the <a href="../api_c/env_set_errfile.html">DBENV->set_errfile</a> function.
<p>The DB->set_errfile interface may be used to configure Berkeley DB at any time
during the life of the application.
<h1>See Also</h1>
<a href="../api_c/env_close.html">DBENV->close</a>,
<a href="../api_c/env_create.html">db_env_create</a>,
<a href="../api_c/env_open.html">DBENV->open</a>,
<a href="../api_c/env_remove.html">DBENV->remove</a>,
<a href="../api_c/db_err.html">DBENV->err</a>,
<a href="../api_c/env_strerror.html">db_strerror</a>,
<a href="../api_c/env_version.html">db_version</a>,
<a href="../api_c/env_set_cachesize.html">DBENV->set_cachesize</a>,
<a href="../api_c/env_set_errcall.html">DBENV->set_errcall</a>,
<a href="../api_c/env_set_errfile.html">DBENV->set_errfile</a>,
<a href="../api_c/env_set_errpfx.html">DBENV->set_errpfx</a>,
<a href="../api_c/env_set_flags.html">DBENV->set_flags</a>,
<a href="../api_c/env_set_mutexlocks.html">DBENV->set_mutexlocks</a>,
<a href="../api_c/env_set_paniccall.html">DBENV->set_paniccall</a>,
and
<a href="../api_c/env_set_verbose.html">DBENV->set_verbose</a>.
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