This file is indexed.

/usr/include/lua5.3/lfs.h is in lua-filesystem-dev 1.6.3-1.

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The actual contents of the file can be viewed below.

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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

#ifdef _WIN32
#define chdir(p) (_chdir(p))
#define getcwd(d, s) (_getcwd(d, s))
#define rmdir(p) (_rmdir(p))
#define fileno(f) (_fileno(f))
#endif


int luaopen_lfs (lua_State *L);