1/* $NetBSD: pwgr.c,v 1.1 2012/03/17 16:33:14 jruoho Exp $ */
2/*
3 * Copyright (c) 2007 The NetBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
19 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
26 */
27
28/*
29 * This file implements replacements for all user/group-related functions
30 * called by id(1).  It provides fake but deterministic user and group
31 * information.  The details are as such:
32 * User root, uid 0, primary group 0 (wheel).
33 * User test, uid 100, primary group 100 (users), secondary group 0 (wheel).
34 */
35
36#include <sys/types.h>
37
38#include <errno.h>
39#include <grp.h>
40#include <pwd.h>
41#include <stdlib.h>
42#include <unistd.h>
43#include <string.h>
44
45char Login[16];
46struct group GrEntry;
47struct passwd PwEntry;
48
49gid_t
50getgid(void)
51{
52	return 100;
53}
54
55gid_t
56getegid(void)
57{
58	if (getenv("LIBFAKE_EGID_ROOT") != NULL)
59		return 0;
60	else
61		return 100;
62}
63
64uid_t
65getuid(void)
66{
67	return 100;
68}
69
70uid_t
71geteuid(void)
72{
73	if (getenv("LIBFAKE_EUID_ROOT") != NULL)
74		return 0;
75	else
76		return 100;
77}
78
79char *
80getlogin(void)
81{
82	strcpy(Login, "test");
83	return Login;
84}
85
86struct group *
87getgrgid(gid_t gid)
88{
89	struct group *g = &GrEntry;
90
91	memset(g, 0, sizeof(*g));
92	if (gid == 0) {
93		g->gr_name = __UNCONST("wheel");
94		g->gr_gid = 0;
95	} else if (gid == 100) {
96		g->gr_name = __UNCONST("users");
97		g->gr_gid = 100;
98	} else
99		g = NULL;
100
101	return g;
102}
103
104int
105getgrouplist(const char *name, gid_t basegid, gid_t *groups, int *ngroups)
106{
107	int cnt, ret;
108
109	if (strcmp(name, "root") == 0) {
110		if (*ngroups >= 1) {
111			groups[0] = basegid;
112			cnt = 1;
113		}
114
115		ret = (*ngroups >= cnt) ? 0 : -1;
116		*ngroups = cnt;
117	} else if (strcmp(name, "test") == 0) {
118		if (*ngroups >= 1) {
119			groups[0] = basegid;
120			cnt = 1;
121		}
122
123		if (*ngroups >= 2) {
124			groups[1] = 0;
125			cnt = 2;
126		}
127
128		ret = (*ngroups >= cnt) ? 0 : -1;
129		*ngroups = cnt;
130	} else
131		ret = -1;
132
133	return ret;
134}
135
136int
137getgroups(int gidsetlen, gid_t *gidset)
138{
139	if (gidsetlen < 2) {
140		errno = EINVAL;
141		return -1;
142	}
143
144	gidset[0] = 100;
145	gidset[1] = 0;
146	return 2;
147}
148
149struct passwd *
150getpwnam(const char *login)
151{
152	struct passwd *p = &PwEntry;
153
154	memset(p, 0, sizeof(*p));
155	if (strcmp(login, "root") == 0) {
156		p->pw_name = __UNCONST("root");
157		p->pw_uid = 0;
158		p->pw_gid = 0;
159	} else if (strcmp(login, "test") == 0) {
160		p->pw_name = __UNCONST("test");
161		p->pw_uid = 100;
162		p->pw_gid = 100;
163	} else
164		p = NULL;
165
166	return p;
167}
168
169struct passwd *
170getpwuid(uid_t uid)
171{
172	struct passwd *p = &PwEntry;
173
174	memset(p, 0, sizeof(*p));
175	if (uid == 0) {
176		p->pw_name = __UNCONST("root");
177		p->pw_uid = 0;
178		p->pw_gid = 0;
179	} else if (uid == 100) {
180		p->pw_name = __UNCONST("test");
181		p->pw_uid = 100;
182		p->pw_gid = 100;
183	} else
184		p = NULL;
185
186	return p;
187}
188