/* * Copyright (c) 2010-2013, 2015-2017 Todd C. Miller <Todd.Miller@sudo.ws> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #ifndef SUDOERS_PWUTIL_H #define SUDOERS_PWUTIL_H #define ptr_to_item(p) ((struct cache_item *)((char *)p - offsetof(struct cache_item_##p, p))) /* * Generic cache element. */ struct cache_item { unsigned int refcnt; unsigned int type; /* only used for gidlist */ char registry[16]; /* AIX-specific, empty otherwise */ /* key */ union { uid_t uid; gid_t gid; char *name; } k; /* datum */ union { struct passwd *pw; struct group *gr; struct group_list *grlist; struct gid_list *gidlist; } d; }; /* * Container structs to simpify size and offset calculations and guarantee * proper aligment of struct passwd, group, gid_list and group_list. */ struct cache_item_pw { struct cache_item cache; struct passwd pw; }; struct cache_item_gr { struct cache_item cache; struct group gr; }; struct cache_item_grlist { struct cache_item cache; struct group_list grlist; /* actually bigger */ }; struct cache_item_gidlist { struct cache_item cache; struct gid_list gidlist; /* actually bigger */ }; struct cache_item *sudo_make_gritem(gid_t gid, const char *group); struct cache_item *sudo_make_grlist_item(const struct passwd *pw, char * const *groups); struct cache_item *sudo_make_gidlist_item(const struct passwd *pw, char * const *gids, unsigned int type); struct cache_item *sudo_make_pwitem(uid_t uid, const char *user); #endif /* SUDOERS_PWUTIL_H */