src/common/credentials.c

   1 /*
   2  * Copyright (C) 2020 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
   3  *
   4  * SPDX-License-Identifier: LGPL-2.1-only
   5  *
   6  */
   7
   8 #include <stdbool.h>
   9 #include "credentials.h"
  10
  11 LTTNG_HIDDEN
  12 uid_t lttng_credentials_get_uid(const struct lttng_credentials *creds)
  13 {
  14         return LTTNG_OPTIONAL_GET(creds->uid);
  15 }
  16
  17 LTTNG_HIDDEN
  18 gid_t lttng_credentials_get_gid(const struct lttng_credentials *creds)
  19 {
  20         return LTTNG_OPTIONAL_GET(creds->gid);
  21 }
  22
  23 LTTNG_HIDDEN
  24 bool lttng_credentials_is_equal_uid(const struct lttng_credentials *a,
  25                 const struct lttng_credentials *b)
  26 {
  27         LTTNG_ASSERT(a);
  28         LTTNG_ASSERT(b);
  29
  30         /* XOR on the is_set value */
  31         if (!!a->uid.is_set != !!b->uid.is_set) {
  32                 return false;
  33         }
  34
  35         if (!a->uid.is_set && !b->uid.is_set) {
  36                 return true;
  37         }
  38
  39         /* Both a and b are set. */
  40         return a->uid.value == b->uid.value;
  41 }
  42
  43 LTTNG_HIDDEN
  44 bool lttng_credentials_is_equal_gid(const struct lttng_credentials *a,
  45                 const struct lttng_credentials *b)
  46 {
  47         LTTNG_ASSERT(a);
  48         LTTNG_ASSERT(b);
  49
  50         /* XOR on the is_set value */
  51         if (!!a->gid.is_set != !!b->gid.is_set) {
  52                 return false;
  53         }
  54
  55         if (!a->gid.is_set && !b->gid.is_set) {
  56                 return true;
  57         }
  58
  59         /* Both a and b are set. */
  60         return a->gid.value == b->gid.value;
  61 }
  62
  63 LTTNG_HIDDEN
  64 bool lttng_credentials_is_equal(const struct lttng_credentials *a,
  65                 const struct lttng_credentials *b)
  66 {
  67         LTTNG_ASSERT(a);
  68         LTTNG_ASSERT(b);
  69
  70         return lttng_credentials_is_equal_uid(a, b) &&
  71                         lttng_credentials_is_equal_gid(a, b);
  72 }