src/basic/capability-util.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   Copyright 2010 Lennart Poettering
   6 ***/
   7
   8 #include <stdbool.h>
   9 #include <stdint.h>
  10 #include <sys/capability.h>
  11 #include <sys/types.h>
  12
  13 #include "macro.h"
  14 #include "util.h"
  15
  16 #define CAP_ALL (uint64_t) -1
  17
  18 unsigned long cap_last_cap(void);
  19 #if 0 /// UNNEEDED by elogind
  20 int have_effective_cap(int value);
  21 int capability_bounding_set_drop(uint64_t keep, bool right_now);
  22 int capability_bounding_set_drop_usermode(uint64_t keep);
  23
  24 int capability_ambient_set_apply(uint64_t set, bool also_inherit);
  25 int capability_update_inherited_set(cap_t caps, uint64_t ambient_set);
  26
  27 int drop_privileges(uid_t uid, gid_t gid, uint64_t keep_capabilities);
  28
  29 int drop_capability(cap_value_t cv);
  30
  31 DEFINE_TRIVIAL_CLEANUP_FUNC(cap_t, cap_free);
  32 #define _cleanup_cap_free_ _cleanup_(cap_freep)
  33
  34 static inline void cap_free_charpp(char **p) {
  35         if (*p)
  36                 cap_free(*p);
  37 }
  38 #define _cleanup_cap_free_charp_ _cleanup_(cap_free_charpp)
  39 #endif // 0
  40
  41 static inline bool cap_test_all(uint64_t caps) {
  42         uint64_t m;
  43         m = (UINT64_C(1) << (cap_last_cap() + 1)) - 1;
  44         return FLAGS_SET(caps, m);
  45 }
  46
  47 #if 0 /// UNNEEDED by elogind
  48 bool ambient_capabilities_supported(void);
  49 #endif // 0