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Split out implementation-specific back end code out of pwutil.c

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into pwutil_impl.c.  This will allow the main pwutil code to be
used for lookup methods other than getpw* and getgr*.
This commit is contained in:
Todd C. Miller
2012-09-21 16:25:01 -04:00
parent a7ce1909fe
commit 883e0ec3cc
5 changed files with 444 additions and 346 deletions
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66
plugins/sudoers/pwutil.h Normal file
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/*
* Copyright (c) 2010-2012
* Todd C. Miller <Todd.Miller@courtesan.com>
*
* 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 _PWUTIL_H
#define _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;
/* key */
union {
uid_t uid;
gid_t gid;
char *name;
} k;
/* datum */
union {
struct passwd *pw;
struct group *gr;
struct group_list *grlist;
} d;
};
/*
* Container structs to simpify size and offset calculations and guarantee
* proper aligment of struct passwd, group 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 *sudo_make_gritem(gid_t gid, const char *group);
struct cache_item *sudo_make_grlist_item(struct passwd *pw);
struct cache_item *sudo_make_pwitem(uid_t uid, const char *user);
#endif /* _PWUTIL_H */