src/privilege.c

   1 /*
   2  * charybdis: an advanced ircd.
   3  * privilege.c: Dynamic privileges API.
   4  *
   5  * Copyright (c) 2008 William Pitcock <nenolod@dereferenced.org>
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice is present in all copies.
  10  *
  11  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  12  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  13  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  14  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  15  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  16  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  17  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  18  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  19  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  20  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  21  * POSSIBILITY OF SUCH DAMAGE.
  22  */
  23
  24 #include <stdinc.h>
  25 #include "privilege.h"
  26
  27 static rb_dlink_list privilegeset_list = {};
  28
  29 int
  30 privilegeset_in_set(struct PrivilegeSet *set, const char *priv)
  31 {
  32         s_assert(set != NULL);
  33         s_assert(priv != NULL);
  34
  35         return strstr(set->privs, priv) != NULL;
  36 }
  37
  38 struct PrivilegeSet *
  39 privilegeset_set_new(const char *name, const char *privs, PrivilegeFlags flags)
  40 {
  41         struct PrivilegeSet *set;
  42
  43         s_assert(privilegeset_get(name) == NULL);
  44
  45         set = rb_malloc(sizeof(struct PrivilegeSet));
  46         set->refs = 1;
  47         set->name = rb_strdup(name);
  48         set->privs = rb_strdup(privs);
  49         set->flags = flags;
  50
  51         rb_dlinkAdd(set, &set->node, &privilegeset_list);
  52
  53         return set;
  54 }
  55
  56 struct PrivilegeSet *
  57 privilegeset_extend(struct PrivilegeSet *parent, const char *name, const char *privs, PrivilegeFlags flags)
  58 {
  59         struct PrivilegeSet *set;
  60
  61         s_assert(parent != NULL);
  62         s_assert(name != NULL);
  63         s_assert(privs != NULL);
  64         s_assert(privilegeset_get(name) == NULL);
  65
  66         set = rb_malloc(sizeof(struct PrivilegeSet));
  67         set->refs = 1;
  68         set->name = rb_strdup(name);
  69         set->flags = flags;
  70         set->privs = rb_malloc(strlen(parent->privs) + 1 + strlen(privs) + 1);
  71         strcpy(set->privs, parent->privs);
  72         strcat(set->privs, " ");
  73         strcat(set->privs, privs);
  74
  75         rb_dlinkAdd(set, &set->node, &privilegeset_list);
  76
  77         return set;
  78 }
  79
  80 struct PrivilegeSet *
  81 privilegeset_get(const char *name)
  82 {
  83         rb_dlink_node *iter;
  84
  85         s_assert(name != NULL);
  86
  87         RB_DLINK_FOREACH(iter, privilegeset_list.head)
  88         {
  89                 struct PrivilegeSet *set = (struct PrivilegeSet *) iter->data;
  90
  91                 if (!strcasecmp(set->name, name))
  92                         return set;
  93         }
  94
  95         return NULL;
  96 }
  97
  98 struct PrivilegeSet *
  99 privilegeset_ref(struct PrivilegeSet *set)
 100 {
 101         s_assert(set != NULL);
 102
 103         set->refs++;
 104
 105         return set;
 106 }
 107
 108 void
 109 privilegeset_unref(struct PrivilegeSet *set)
 110 {
 111         s_assert(set != NULL);
 112
 113         if (--set->refs == 0)
 114         {
 115                 rb_dlinkDelete(&set->node, &privilegeset_list);
 116
 117                 rb_free(set->name);
 118                 rb_free(set->privs);
 119                 rb_free(set);
 120         }
 121 }