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<!-- keywords: sqlite3_filename_database sqlite3_filename_journal sqlite3_filename_wal -->
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<a href="intro.html"><h2>SQLite C Interface</h2></a>
<h2>Translate filenames</h2>
</div>
<blockquote><pre>
const char *sqlite3_filename_database(sqlite3_filename);
const char *sqlite3_filename_journal(sqlite3_filename);
const char *sqlite3_filename_wal(sqlite3_filename);
</pre></blockquote>
<p>
These routines are available to <a href="../vfs.html">custom VFS implementations</a> for
translating filenames between the main database file, the journal file,
and the WAL file.</p>
<p>If F is the name of an sqlite database file, journal file, or WAL file
passed by the SQLite core into the VFS, then sqlite3_filename_database(F)
returns the name of the corresponding database file.</p>
<p>If F is the name of an sqlite database file, journal file, or WAL file
passed by the SQLite core into the VFS, or if F is a database filename
obtained from <a href="../c3ref/db_filename.html">sqlite3_db_filename()</a>, then sqlite3_filename_journal(F)
returns the name of the corresponding rollback journal file.</p>
<p>If F is the name of an sqlite database file, journal file, or WAL file
that was passed by the SQLite core into the VFS, or if F is a database
filename obtained from <a href="../c3ref/db_filename.html">sqlite3_db_filename()</a>, then
sqlite3_filename_wal(F) returns the name of the corresponding
WAL file.</p>
<p>In all of the above, if F is not the name of a database, journal or WAL
filename passed into the VFS from the SQLite core and F is not the
return value from <a href="../c3ref/db_filename.html">sqlite3_db_filename()</a>, then the result is
undefined and is likely a memory access violation.
</p><p>See also lists of
<a href="objlist.html">Objects</a>,
<a href="constlist.html">Constants</a>, and
<a href="funclist.html">Functions</a>.</p>
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