LXR linux/tools/perf/util/cap.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Capability utilities
   4 */
   5
   6#ifdef HAVE_LIBCAP_SUPPORT
   7
   8#include "cap.h"
   9#include <stdbool.h>
  10#include <sys/capability.h>
  11
  12bool perf_cap__capable(cap_value_t cap)
  13{
  14        cap_flag_value_t val;
  15        cap_t caps = cap_get_proc();
  16
  17        if (!caps)
  18                return false;
  19
  20        if (cap_get_flag(caps, cap, CAP_EFFECTIVE, &val) != 0)
  21                val = CAP_CLEAR;
  22
  23        if (cap_free(caps) != 0)
  24                return false;
  25
  26        return val == CAP_SET;
  27}
  28
  29#endif  /* HAVE_LIBCAP_SUPPORT */
  30