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commit e01979620025666633250b3e2d545fe59c629f73
Author: Vladimír Čunát <vladimir.cunat@nic.cz>
Date: Fri Nov 13 14:16:32 2020 +0100
fix map() command on 32-bit platforms; regressed in 5.2.0
LuaJIT FFI was using opendir() (etc.) variants with 32-bit inodes
but the C parts was using them as 64-bit inode variants.
Consequently the `struct dirent` layout didn't match and we were getting
filenames shifted by eight bytes.
Now the whole dir-listing lua function is written in C.
diff --git a/.luacheckrc b/.luacheckrc
index 0cf0b884..67bc18f6 100644
--- a/.luacheckrc
+++ b/.luacheckrc
@@ -20,6 +20,7 @@ new_read_globals = {
'user',
'verbose',
'worker',
+ 'kluautil_list_dir',
-- Sandbox declarations
'kB',
'MB',
diff --git a/NEWS b/NEWS
index 2eae3082..9d8cde99 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,10 @@
Knot Resolver X.Y.X (yyyy-mm-dd)
================================
+Bugfixes
+--------
+- fix map() command on 32-bit platforms; regressed in 5.2.0 (!1093)
+
Knot Resolver 5.2.0 (2020-11-11)
================================
diff --git a/daemon/bindings/impl.c b/daemon/bindings/impl.c
index d10f4525..d9ad0774 100644
--- a/daemon/bindings/impl.c
+++ b/daemon/bindings/impl.c
@@ -2,6 +2,7 @@
* SPDX-License-Identifier: GPL-3.0-or-later
*/
+#include <dirent.h>
#include <lua.h>
#include <lauxlib.h>
#include <string.h>
@@ -29,6 +30,29 @@ const char * lua_table_checkindices(lua_State *L, const char *keys[])
return NULL;
}
+/** Return table listing filenames in a given directory (ls -A). */
+static int kluautil_list_dir(lua_State *L)
+{
+ lua_newtable(L); // empty table even on errors
+
+ const char *path = lua_tolstring(L, 1, NULL);
+ if (!path) return 1;
+ DIR *dir = opendir(path);
+ if (!dir) return 1;
+
+ struct dirent *entry;
+ int lua_i = 1;
+ while ((entry = readdir(dir)) != NULL) {
+ if (strcmp(entry->d_name, ".") && strcmp(entry->d_name, "..")) {
+ lua_pushstring(L, entry->d_name);
+ lua_rawseti(L, -2, lua_i++);
+ }
+ }
+
+ closedir(dir);
+ return 1;
+}
+
/* Each of these just creates the correspondingly named lua table of functions. */
int kr_bindings_cache (lua_State *L); /* ./cache.c */
@@ -44,6 +68,9 @@ void kr_bindings_register(lua_State *L)
kr_bindings_modules(L);
kr_bindings_net(L);
kr_bindings_worker(L);
+
+ /* Finally some lua utils *written in C*, not really a binding. */
+ lua_register(L, "kluautil_list_dir", kluautil_list_dir);
}
void lua_error_p(lua_State *L, const char *fmt, ...)
diff --git a/daemon/lua/kluautil.lua b/daemon/lua/kluautil.lua
index 57912e7b..e73e952c 100644
--- a/daemon/lua/kluautil.lua
+++ b/daemon/lua/kluautil.lua
@@ -1,6 +1,5 @@
-- SPDX-License-Identifier: GPL-3.0-or-later
-local ffi = require('ffi')
local kluautil = {}
-- Get length of table
@@ -28,14 +27,6 @@ function kluautil.kr_table_unpack(tab)
return unpack(tab, 1, tab.n)
end
-ffi.cdef([[
- typedef struct __dirstream DIR;
- DIR *opendir(const char *name);
- struct dirent *readdir(DIR *dirp);
- int closedir(DIR *dirp);
- char *strerror(int errnum);
-]])
-
-- Fetch over HTTPS
function kluautil.kr_https_fetch(url, out_file, ca_file)
local http_ok, http_request = pcall(require, 'http.request')
@@ -88,26 +79,6 @@ function kluautil.kr_https_fetch(url, out_file, ca_file)
return true
end
--- List directory
-function kluautil.list_dir (path)
- local results = {}
- local dir = ffi.C.opendir(path)
- if dir == nil then
- return results
- end
-
- local entry = ffi.C.readdir(dir)
- while entry ~= nil do
- local entry_name = ffi.string(ffi.C.kr_dirent_name(entry))
- if entry_name ~= '.' and entry_name ~= '..' then
- table.insert(results, entry_name)
- end
- entry = ffi.C.readdir(dir)
- end
-
- ffi.C.closedir(dir)
-
- return results
-end
+kluautil.list_dir = kluautil_list_dir
return kluautil
|
