Recreate repo

group.c

@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-3.0-only */
+/* SPDX-FileCopyrightText: 2026 afiw <afiw@linuxposting.xyz> */
+
+/*
+ * can - query filesystem permissions
+ * Copyright (C) 2026 afiw <afiw@linuxposting.xyz>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, exclusively version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <err.h>
+#include <grp.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include "action.h"
+#include "group.h"
+
+bool can_group(struct group* gr, enum action action, char const* path) {
+  struct stat st;
+  if (stat(path, &st) == -1) {
+    err(EXIT_FAILURE, "%s", path); }
+  if (st.st_mode & other_bit_of_action(action)) {
+    return true; }
+  if (gr->gr_gid == st.st_gid) {
+    if (st.st_mode & group_bit_of_action(action)) {
+      return true; } }
+  return false; }