From 686f0a1794863adc1fe4cb27e920081e9b20e94e Mon Sep 17 00:00:00 2001
From: "martin.holst@gmail.com"
 <martin.holst@gmail.com@ef4ab9da-24cd-11de-8aaa-f3a34680c41f>
Date: Sat, 28 Sep 2013 20:07:28 +0000
Subject: [PATCH] Moved script libraries into lualibs/folder, and added a patch
 to include the folder in the LUA_PATH (a.k.a package.path). See
 http://proxmark.org/forum/viewtopic.php?id=1750 for more details

---
 client/{ => lualibs}/commands.lua        |  0
 client/{ => lualibs}/getopt.lua          |  0
 client/{ => lualibs}/mf_default_keys.lua |  0
 client/{ => lualibs}/read14a.lua         |  0
 client/scripting.c                       | 30 ++++++++++++++++++++++++
 5 files changed, 30 insertions(+)
 rename client/{ => lualibs}/commands.lua (100%)
 rename client/{ => lualibs}/getopt.lua (100%)
 rename client/{ => lualibs}/mf_default_keys.lua (100%)
 rename client/{ => lualibs}/read14a.lua (100%)

diff --git a/client/commands.lua b/client/lualibs/commands.lua
similarity index 100%
rename from client/commands.lua
rename to client/lualibs/commands.lua
diff --git a/client/getopt.lua b/client/lualibs/getopt.lua
similarity index 100%
rename from client/getopt.lua
rename to client/lualibs/getopt.lua
diff --git a/client/mf_default_keys.lua b/client/lualibs/mf_default_keys.lua
similarity index 100%
rename from client/mf_default_keys.lua
rename to client/lualibs/mf_default_keys.lua
diff --git a/client/read14a.lua b/client/lualibs/read14a.lua
similarity index 100%
rename from client/read14a.lua
rename to client/lualibs/read14a.lua
diff --git a/client/scripting.c b/client/scripting.c
index 82d6ffc9..ae11d7ca 100644
--- a/client/scripting.c
+++ b/client/scripting.c
@@ -137,8 +137,33 @@ static int l_ukbhit(lua_State *L)
     return 1;
 }
 
+/**
+ * @brief Sets the lua path to include "./lualibs/?.lua", in order for a script to be
+ * able to do "require('foobar')" if foobar.lua is within lualibs folder.
+ * Taken from http://stackoverflow.com/questions/4125971/setting-the-global-lua-path-variable-from-c-c
+ * @param L
+ * @param path
+ * @return
+ */
+int setLuaPath( lua_State* L, const char* path )
+{
+    lua_getglobal( L, "package" );
+    lua_getfield( L, -1, "path" ); // get field "path" from table at top of stack (-1)
+    const char* cur_path = lua_tostring( L, -1 ); // grab path string from top of stack
+    int requiredLength = strlen(cur_path)+ strlen(path)+10; //A few bytes too many, whatever we can afford it
+    char * buf = malloc(requiredLength);
+    snprintf(buf, requiredLength, "%s;%s", cur_path, path);
+    lua_pop( L, 1 ); // get rid of the string on the stack we just pushed on line 5
+    lua_pushstring( L, buf ); // push the new one
+    lua_setfield( L, -2, "path" ); // set the field "path" in table at -2 with value at top of stack
+    lua_pop( L, 1 ); // get rid of package table from top of stack
+    return 0; // all done!
+}
+
+
 int set_pm3_libraries(lua_State *L)
 {
+
     static const luaL_Reg libs[] = {
         {"SendCommand",                 l_SendCommand},
         {"WaitForResponseTimeout",      l_WaitForResponseTimeout},
@@ -165,5 +190,10 @@ int set_pm3_libraries(lua_State *L)
 
     //-- remove the global environment table from the stack
     lua_pop(L, 1);
+
+    //-- Last but not least, add to the LUA_PATH (package.path in lua)
+    // so we can load libraries from the ./lualib/ - directory
+    setLuaPath(L,"./lualibs/?.lua");
+
     return 1;
 }
-- 
2.39.2