This file is indexed.

/usr/include/lua5.2/lfs.h is in lua-filesystem-dev 1.6.2-3.

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/*
** LuaFileSystem
** Copyright Kepler Project 2003 (http://www.keplerproject.org/luafilesystem)
**
** $Id: lfs.h,v 1.5 2008/02/19 20:08:23 mascarenhas Exp $
*/

/* Define 'chdir' for systems that do not implement it */
#ifdef NO_CHDIR
#define chdir(p)	(-1)
#define chdir_error	"Function 'chdir' not provided by system"
#else
#define chdir_error	strerror(errno)
#endif


int luaopen_lfs (lua_State *L);