include/capability.h

   1 /*
   2  * Copyright (c) 2012 William Pitcock <nenolod@dereferenced.org>.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice is present in all copies.
   7  *
   8  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   9  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  10  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  11  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  12  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  13  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  14  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  15  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  16  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  17  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  18  * POSSIBILITY OF SUCH DAMAGE.
  19  */
  20
  21 #ifndef __CAPABILITY_H__
  22 #define __CAPABILITY_H__
  23
  24 #include "stdinc.h"
  25 #include "rb_dictionary.h"
  26
  27 struct CapabilityIndex {
  28         const char *name;
  29         rb_dictionary *cap_dict;
  30         unsigned int highest_bit;
  31         rb_dlink_node node;
  32 };
  33
  34 #define CAP_ORPHANED    0x1
  35 #define CAP_REQUIRED    0x2
  36
  37 struct CapabilityEntry {
  38         const char *cap;
  39         unsigned int value;
  40         unsigned int flags;
  41         void *ownerdata;
  42 };
  43
  44 extern struct CapabilityEntry *capability_find(struct CapabilityIndex *idx, const char *cap);
  45 extern unsigned int capability_get(struct CapabilityIndex *idx, const char *cap, void **ownerdata);
  46 extern unsigned int capability_put(struct CapabilityIndex *idx, const char *cap, void *ownerdata);
  47 extern unsigned int capability_put_anonymous(struct CapabilityIndex *idx);
  48 extern void capability_orphan(struct CapabilityIndex *idx, const char *cap);
  49 extern void capability_require(struct CapabilityIndex *idx, const char *cap);
  50
  51 extern struct CapabilityIndex *capability_index_create(const char *name);
  52 extern void capability_index_destroy(struct CapabilityIndex *);
  53 extern const char *capability_index_list(struct CapabilityIndex *, unsigned int capability_mask);
  54 extern unsigned int capability_index_mask(struct CapabilityIndex *);
  55 extern unsigned int capability_index_get_required(struct CapabilityIndex *);
  56 extern void capability_index_stats(void (*cb)(const char *line, void *privdata), void *privdata);
  57
  58 #endif