-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
#include <stdbool.h>
#include <stdint.h>
#include <sys/capability.h>
#include <sys/types.h>
#include "macro.h"
+#include "missing_capability.h"
#include "util.h"
#define CAP_ALL (uint64_t) -1
static inline bool cap_test_all(uint64_t caps) {
uint64_t m;
m = (UINT64_C(1) << (cap_last_cap() + 1)) - 1;
- return (caps & m) == m;
+ return FLAGS_SET(caps, m);
+}
+
+bool ambient_capabilities_supported(void);
+
+/* Identical to linux/capability.h's CAP_TO_MASK(), but uses an unsigned 1U instead of a signed 1 for shifting left, in
+ * order to avoid complaints about shifting a signed int left by 31 bits, which would make it negative. */
+#define CAP_TO_MASK_CORRECTED(x) (1U << ((x) & 31U))
+
+typedef struct CapabilityQuintet {
+ /* Stores all five types of capabilities in one go. Note that we use (uint64_t) -1 for unset here. This hence
+ * needs to be updated as soon as Linux learns more than 63 caps. */
+ uint64_t effective;
+ uint64_t bounding;
+ uint64_t inheritable;
+ uint64_t permitted;
+ uint64_t ambient;
+} CapabilityQuintet;
+
+assert_cc(CAP_LAST_CAP < 64);
+
+#define CAPABILITY_QUINTET_NULL { (uint64_t) -1, (uint64_t) -1, (uint64_t) -1, (uint64_t) -1, (uint64_t) -1 }
+
+static inline bool capability_quintet_is_set(const CapabilityQuintet *q) {
+ return q->effective != (uint64_t) -1 ||
+ q->bounding != (uint64_t) -1 ||
+ q->inheritable != (uint64_t) -1 ||
+ q->permitted != (uint64_t) -1 ||
+ q->ambient != (uint64_t) -1;
}
+
+int capability_quintet_enforce(const CapabilityQuintet *q);