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Annotation of embedaddon/sudo/plugins/sudoers/pwutil.h, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (c) 2010-2013 Todd C. Miller <Todd.Miller@courtesan.com>
                      3:  *
                      4:  * Permission to use, copy, modify, and 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 appear in all copies.
                      7:  *
                      8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                      9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     12:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     13:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     14:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     15:  */
                     16: 
                     17: #ifndef _SUDOERS_PWUTIL_H
                     18: #define _SUDOERS_PWUTIL_H
                     19: 
                     20: #define ptr_to_item(p) ((struct cache_item *)((char *)p - offsetof(struct cache_item_##p, p)))
                     21: 
                     22: /*
                     23:  * Generic cache element.
                     24:  */
                     25: struct cache_item {
                     26:     unsigned int refcnt;
                     27:     /* key */
                     28:     union {
                     29:        uid_t uid;
                     30:        gid_t gid;
                     31:        char *name;
                     32:     } k;
                     33:     /* datum */
                     34:     union {
                     35:        struct passwd *pw;
                     36:        struct group *gr;
                     37:        struct group_list *grlist;
                     38:     } d;
                     39: };
                     40: 
                     41: /*
                     42:  * Container structs to simpify size and offset calculations and guarantee
                     43:  * proper aligment of struct passwd, group and group_list.
                     44:  */
                     45: struct cache_item_pw {
                     46:     struct cache_item cache;
                     47:     struct passwd pw;
                     48: };
                     49: 
                     50: struct cache_item_gr {
                     51:     struct cache_item cache;
                     52:     struct group gr;
                     53: };
                     54: 
                     55: struct cache_item_grlist {
                     56:     struct cache_item cache;
                     57:     struct group_list grlist;
                     58:     /* actually bigger */
                     59: };
                     60: 
                     61: struct cache_item *sudo_make_gritem(gid_t gid, const char *group);
                     62: struct cache_item *sudo_make_grlist_item(struct passwd *pw, char * const *groups, char * const *gids);
                     63: struct cache_item *sudo_make_pwitem(uid_t uid, const char *user);
                     64: 
                     65: #endif /* _SUDOERS_PWUTIL_H */