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Code Issues Releases Wiki Activity

Add fileExists() Lua function

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fgenesis 2014-02-12 16:59:14 +01:00
parent a9712944ed
commit 00ab9a38b6
1 changed files with 37 additions and 0 deletions
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37
Aquaria/ScriptInterface.cpp
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@ -656,6 +656,32 @@ inline float interpolateVec3(lua_State *L, InterpolatedVector& vec, int argOffs)
getBool(L, argOffs+6)); // ease
}
static void safePath(lua_State *L, const std::string& path)
{
// invalid characters for file/path names.
// Filter out \ as well, it'd work on on win32 only, so it's not supposed to be used.
size_t invchr = path.find_first_of("\\\":*?<>|");
if(invchr != std::string::npos)
{
lua_pushfstring(L, "Invalid char in path/file name: %c", path[invchr]);
lua_error(L);
}
// Block attempts to access files outside of the "safe area"
if(path.length())
{
if(path[0] == '/')
{
lua_pushliteral(L, "Absolute paths are not allowed");
lua_error(L);
}
if(path.find("../") != std::string::npos)
{
lua_pushliteral(L, "Accessing parent is not allowed");
lua_error(L);
}
}
}
//----------------------------------//
@ -833,6 +859,15 @@ luaFunc(loadfile_caseinsensitive)
}
}
luaFunc(fileExists)
{
const std::string s = getString(L);
safePath(L, s);
std::string res;
bool there = findFile_helper(s.c_str(), res);
luaReturnBool(there);
}
// ----- RenderObject common functions -----
@ -8801,6 +8836,8 @@ static const struct {
{"dofile", l_dofile_caseinsensitive},
{"loadfile", l_loadfile_caseinsensitive},
luaRegister(fileExists),
luaRegister(debugBreak),
luaRegister(setIgnoreAction),
luaRegister(isIgnoreAction),