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Commits › b6c1d5d
Add input validation to lua functions
Baptiste Daroussin committed 5 years ago
commit b6c1d5d28ca0b9a4988daa41c79fc8fc11f82e46
parent 76f1719
1 file changed +15 -0
modified libpkg/lua_scripts.c
@@ -93,6 +93,9 @@ stack_dump(lua_State *L)
static int

lua_print_msg(lua_State *L)

{
+ 
	int n = lua_gettop(L);
+ 
	luaL_argcheck(L, n == 1, n > 1 ? 2 : n,
+ 
	    "pkg.print_msg takes exactly one argument");

	const char* str = luaL_checkstring(L, 1);

	lua_getglobal(L, "msgfd");

	int fd = lua_tointeger(L, -1);
@@ -105,6 +108,9 @@ lua_print_msg(lua_State *L)
static int

lua_pkg_copy(lua_State *L)

{
+ 
	int n = lua_gettop(L);
+ 
	luaL_argcheck(L, n == 2, n > 2 ? 3 : n,
+ 
	    "pkg.copy takes exactly two arguments");

	const char* src = luaL_checkstring(L, 1);

	const char* dst = luaL_checkstring(L, 2);

	char *buf1, *buf2;
@@ -176,6 +182,9 @@ lua_pkg_copy(lua_State *L)
static int

lua_pkg_filecmp(lua_State *L)

{
+ 
	int n = lua_gettop(L);
+ 
	luaL_argcheck(L, n == 2, n > 2 ? 3 : n,
+ 
	    "pkg.filecmp takes exactly two arguments");

	const char* file1 = luaL_checkstring(L, 1);

	const char* file2 = luaL_checkstring(L, 2);

	char *buf1, *buf2;
@@ -238,6 +247,9 @@ lua_pkg_filecmp(lua_State *L)
static int

lua_prefix_path(lua_State *L)

{
+ 
	int n = lua_gettop(L);
+ 
	luaL_argcheck(L, n == 1, n > 1 ? 2 : n,
+ 
	    "pkg.prefix_path takes exactly one argument");

	const char *str = luaL_checkstring(L, 1);

	lua_getglobal(L, "package");

	struct pkg *p = lua_touserdata(L, -1);
@@ -327,6 +339,9 @@ lua_os_rename(lua_State *L)
static int

lua_stat(lua_State *L)

{
+ 
	int n = lua_gettop(L);
+ 
	luaL_argcheck(L, n == 1, n > 1 ? 2 : n,
+ 
	    "pkg.stat takes exactly one argument");

	const char *path = RELATIVE_PATH(luaL_checkstring(L, 1));

	lua_getglobal(L, "package");

	struct pkg *pkg = lua_touserdata(L, -1);