1 files changed, 34 insertions, 0 deletions
diff --git a/src/basic/uid-range.h b/src/basic/uid-range.h
new file mode 100644
index 0000000..461a511
--- /dev/null
+++ b/src/basic/uid-range.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <stdbool.h>
+#include <sys/types.h>
+
+#include "macro.h"
+
+typedef struct UidRangeEntry {
+        uid_t start, nr;
+} UidRangeEntry;
+
+typedef struct UidRange {
+        UidRangeEntry *entries;
+        size_t n_entries;
+} UidRange;
+
+UidRange *uid_range_free(UidRange *range);
+DEFINE_TRIVIAL_CLEANUP_FUNC(UidRange*, uid_range_free);
+
+int uid_range_add_internal(UidRange **range, uid_t start, uid_t nr, bool coalesce);
+static inline int uid_range_add(UidRange **range, uid_t start, uid_t nr) {
+        return uid_range_add_internal(range, start, nr, true);
+}
+int uid_range_add_str(UidRange **range, const char *s);
+
+int uid_range_next_lower(const UidRange *range, uid_t *uid);
+
+bool uid_range_covers(const UidRange *range, uid_t start, uid_t nr);
+static inline bool uid_range_contains(const UidRange *range, uid_t uid) {
+        return uid_range_covers(range, uid, 1);
+}
+
+int uid_range_load_userns(UidRange **ret, const char *path);