1<!--$Id: set_func_dirlist.so,v 10.19 2004/08/13 03:39:02 bostic Exp $--> 2<!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> 3<!--See the file LICENSE for redistribution information.--> 4<html> 5<head> 6<title>Berkeley DB: db_env_set_func_dirlist</title> 7<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> 8<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> 9</head> 10<body bgcolor=white> 11<table width="100%"><tr valign=top> 12<td> 13<b>db_env_set_func_dirlist</b> 14</td> 15<td align=right> 16<a href="/api_c/api_core.html"><img src="/images/api.gif" alt="API"></a> 17<a href="/ref/toc.html"><img src="/images/ref.gif" alt="Ref"></a></td> 18</tr></table> 19<hr size=1 noshade> 20<tt> 21<b><pre> 22#include <db.h> 23<p> 24int 25db_env_set_func_dirlist(int (*func_dirlist)(const char *dir, char ***namesp, int *cntp)); 26</pre></b> 27<hr size=1 noshade> 28<b>Description: db_env_set_func_dirlist</b> 29<p>The Berkeley DB library requires the ability to read through a directory and 30create a list of files that the directory contains.</p> 31<p>The db_env_set_func_dirlist method configures all operations performed by a process and 32all of its threads of control, not operations confined to a single 33database environment.</p> 34<p>Although the db_env_set_func_dirlist method may be called at any time during the life of 35the application, it should normally be called before making calls to the 36<a href="/api_c/env_class.html">db_env_create</a> or <a href="/api_c/db_class.html">db_create</a> methods.</p> 37<p>The db_env_set_func_dirlist method 38returns a non-zero error value on failure 39and 0 on success. 40</p> 41<b>Parameters</b> <br> 42 <b>func_dirlist</b><ul compact><li>The <b>func_dirlist</b> parameter is the function which reads through 43a directory and returns a list of the files it contains. 44<p>The <b>dir</b> parameter to this function is the name of the directory 45to be searched.</p> 46<p>The function must return a pointer to an array of nul-terminated file 47names into the memory location to which the <b>namesp</b> parameter 48refers, and a count of the number of elements in the array into the 49memory location to which <b>cntp</b> refers.</p></ul> 50<p>The <b>func_dirlist</b> function must return the value of <b>errno</b> on 51failure and 0 on success.</p> 52<br> 53<br><b>See Also</b> 54<a href="/ref/program/runtime.html">Run-time configuration</a> 55</tt> 56<table width="100%"><tr><td><br></td><td align=right> 57<a href="/api_c/api_core.html"><img src="/images/api.gif" alt="API"></a><a href="/ref/toc.html"><img src="/images/ref.gif" alt="Ref"></a> 58</td></tr></table> 59<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> 60</body> 61</html> 62