1/*-
2 * Copyright (c) 1997 Brian Somers <brian@Awfulhak.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/usr.sbin/ppp/id.c 202192 2010-01-13 17:54:32Z ed $
27 */
28
29#include <sys/param.h>
30#include <sys/socket.h>
31#include <sys/un.h>
32
33#include <sys/ioctl.h>
34#include <fcntl.h>
35#ifndef NONETGRAPH
36#include <netgraph.h>
37#endif
38#include <signal.h>
39#include <stdarg.h>
40#include <stdio.h>
41#include <string.h>
42#include <sysexits.h>
43#if defined(__FreeBSD__) && !defined(NOKLDLOAD)
44#include <sys/linker.h>
45#endif
46#include <unistd.h>
47#ifdef __OpenBSD__
48#include <util.h>
49#else
50#include <libutil.h>
51#endif
52#include <utmpx.h>
53
54#include "log.h"
55#include "main.h"
56#include "id.h"
57
58static int uid;
59static int euid;
60
61void
62ID0init()
63{
64 uid = getuid();
65 euid = geteuid();
66}
67
68static void
69ID0setuser(void)
70{
71 if (seteuid(uid) == -1) {
72 log_Printf(LogERROR, "ID0setuser: Unable to seteuid!\n");
73 AbortProgram(EX_NOPERM);
74 }
75}
76
77uid_t
78ID0realuid()
79{
80 return uid;
81}
82
83static void
84ID0set0(void)
85{
86 if (seteuid(euid) == -1) {
87 log_Printf(LogERROR, "ID0set0: Unable to seteuid!\n");
88 AbortProgram(EX_NOPERM);
89 }
90}
91
92int
93ID0ioctl(int fd, unsigned long req, void *arg)
94{
95 int ret;
96
97 ID0set0();
98 ret = ioctl(fd, req, arg);
99 log_Printf(LogID0, "%d = ioctl(%d, %lu, %p)\n", ret, fd, req, arg);
100 ID0setuser();
101 return ret;
102}
103
104int
105ID0unlink(const char *name)
106{
107 int ret;
108
109 ID0set0();
110 ret = unlink(name);
111 log_Printf(LogID0, "%d = unlink(\"%s\")\n", ret, name);
112 ID0setuser();
113 return ret;
114}
115
116int
117ID0socket(int domain, int type, int protocol)
118{
119 int ret;
120
121 ID0set0();
122 ret = socket(domain, type, protocol);
123 log_Printf(LogID0, "%d = socket(%d, %d, %d)\n", ret, domain, type, protocol);
124 ID0setuser();
125 return ret;
126}
127
128FILE *
129ID0fopen(const char *path, const char *mode)
130{
131 FILE *ret;
132
133 ID0set0();
134 ret = fopen(path, mode);
135 log_Printf(LogID0, "%p = fopen(\"%s\", \"%s\")\n", ret, path, mode);
136 ID0setuser();
137 return ret;
138}
139
140int
141ID0open(const char *path, int flags, ...)
142{
143 int ret;
144 va_list ap;
145
146 va_start(ap, flags);
147 ID0set0();
148 ret = open(path, flags, va_arg(ap, int));
149 log_Printf(LogID0, "%d = open(\"%s\", %d)\n", ret, path, flags);
150 ID0setuser();
151 va_end(ap);
152 return ret;
153}
154
155int
156ID0write(int fd, const void *data, size_t len)
157{
158 int ret;
159
160 ID0set0();
161 ret = write(fd, data, len);
162 log_Printf(LogID0, "%d = write(%d, data, %ld)\n", ret, fd, (long)len);
163 ID0setuser();
164 return ret;
165}
166
167int
168ID0uu_lock(const char *basettyname)
169{
170 int ret;
171
172 ID0set0();
173 ret = uu_lock(basettyname);
174 log_Printf(LogID0, "%d = uu_lock(\"%s\")\n", ret, basettyname);
175 ID0setuser();
176 return ret;
177}
178
179int
180ID0uu_lock_txfr(const char *basettyname, pid_t newpid)
181{
182 int ret;
183
184 ID0set0();
185 ret = uu_lock_txfr(basettyname, newpid);
186 log_Printf(LogID0, "%d = uu_lock_txfr(\"%s\", %ld)\n", ret, basettyname,
187 (long)newpid);
188 ID0setuser();
189 return ret;
190}
191
192int
193ID0uu_unlock(const char *basettyname)
194{
195 int ret;
196
197 ID0set0();
198 ret = uu_unlock(basettyname);
199 log_Printf(LogID0, "%d = uu_unlock(\"%s\")\n", ret, basettyname);
200 ID0setuser();
201 return ret;
202}
203
204void
205ID0login(const struct utmpx *ut)
206{
207 ID0set0();
208 pututxline(ut);
209 log_Printf(LogID0, "pututxline(\"%.*s\", \"%.*s\", \"%.*s\", \"%.*s\")\n",
210 (int)sizeof ut->ut_id, ut->ut_id,
211 (int)sizeof ut->ut_user, ut->ut_user,
212 (int)sizeof ut->ut_line, ut->ut_line,
213 (int)sizeof ut->ut_host, ut->ut_host);
214 ID0setuser();
215}
216
217void
218ID0logout(const struct utmpx *ut)
219{
220 ID0set0();
221 pututxline(ut);
222 log_Printf(LogID0, "pututxline(\"%.*s\")\n",
223 (int)sizeof ut->ut_id, ut->ut_id);
224 ID0setuser();
225}
226
227int
228ID0bind_un(int s, const struct sockaddr_un *name)
229{
230 int result;
231
232 ID0set0();
233 result = bind(s, (const struct sockaddr *)name, sizeof *name);
234 log_Printf(LogID0, "%d = bind(%d, \"%s\", %d)\n",
235 result, s, name->sun_path, (int)sizeof(*name));
236 ID0setuser();
237 return result;
238}
239
240int
241ID0connect_un(int s, const struct sockaddr_un *name)
242{
243 int result;
244
245 ID0set0();
246 result = connect(s, (const struct sockaddr *)name, sizeof *name);
247 log_Printf(LogID0, "%d = connect(%d, \"%s\", %d)\n",
248 result, s, name->sun_path, (int)sizeof(*name));
249 ID0setuser();
250 return result;
251}
252
253int
254ID0kill(pid_t pid, int sig)
255{
256 int result;
257
258 ID0set0();
259 result = kill(pid, sig);
260 log_Printf(LogID0, "%d = kill(%ld, %d)\n", result, (long)pid, sig);
261 ID0setuser();
262 return result;
263}
264
265#if defined(__FreeBSD__) && !defined(NOKLDLOAD)
266int
267ID0kldload(const char *dev)
268{
269 int result;
270
271 ID0set0();
272 result = kldload(dev);
273 log_Printf(LogID0, "%d = kldload(\"%s\")\n", result, dev);
274 ID0setuser();
275 return result;
276}
277#endif
278
279#ifndef NONETGRAPH
280int
281ID0NgMkSockNode(const char *name, int *cs, int *ds)
282{
283 int result;
284
285 ID0set0();
286 result = NgMkSockNode(name, cs, ds);
287 log_Printf(LogID0, "%d = NgMkSockNode(\"%s\", &cs, &ds)\n",
288 result, name ? name : "");
289 ID0setuser();
290 return result;
291}
292#endif
2 * Copyright (c) 1997 Brian Somers <brian@Awfulhak.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/usr.sbin/ppp/id.c 202192 2010-01-13 17:54:32Z ed $
27 */
28
29#include <sys/param.h>
30#include <sys/socket.h>
31#include <sys/un.h>
32
33#include <sys/ioctl.h>
34#include <fcntl.h>
35#ifndef NONETGRAPH
36#include <netgraph.h>
37#endif
38#include <signal.h>
39#include <stdarg.h>
40#include <stdio.h>
41#include <string.h>
42#include <sysexits.h>
43#if defined(__FreeBSD__) && !defined(NOKLDLOAD)
44#include <sys/linker.h>
45#endif
46#include <unistd.h>
47#ifdef __OpenBSD__
48#include <util.h>
49#else
50#include <libutil.h>
51#endif
52#include <utmpx.h>
53
54#include "log.h"
55#include "main.h"
56#include "id.h"
57
58static int uid;
59static int euid;
60
61void
62ID0init()
63{
64 uid = getuid();
65 euid = geteuid();
66}
67
68static void
69ID0setuser(void)
70{
71 if (seteuid(uid) == -1) {
72 log_Printf(LogERROR, "ID0setuser: Unable to seteuid!\n");
73 AbortProgram(EX_NOPERM);
74 }
75}
76
77uid_t
78ID0realuid()
79{
80 return uid;
81}
82
83static void
84ID0set0(void)
85{
86 if (seteuid(euid) == -1) {
87 log_Printf(LogERROR, "ID0set0: Unable to seteuid!\n");
88 AbortProgram(EX_NOPERM);
89 }
90}
91
92int
93ID0ioctl(int fd, unsigned long req, void *arg)
94{
95 int ret;
96
97 ID0set0();
98 ret = ioctl(fd, req, arg);
99 log_Printf(LogID0, "%d = ioctl(%d, %lu, %p)\n", ret, fd, req, arg);
100 ID0setuser();
101 return ret;
102}
103
104int
105ID0unlink(const char *name)
106{
107 int ret;
108
109 ID0set0();
110 ret = unlink(name);
111 log_Printf(LogID0, "%d = unlink(\"%s\")\n", ret, name);
112 ID0setuser();
113 return ret;
114}
115
116int
117ID0socket(int domain, int type, int protocol)
118{
119 int ret;
120
121 ID0set0();
122 ret = socket(domain, type, protocol);
123 log_Printf(LogID0, "%d = socket(%d, %d, %d)\n", ret, domain, type, protocol);
124 ID0setuser();
125 return ret;
126}
127
128FILE *
129ID0fopen(const char *path, const char *mode)
130{
131 FILE *ret;
132
133 ID0set0();
134 ret = fopen(path, mode);
135 log_Printf(LogID0, "%p = fopen(\"%s\", \"%s\")\n", ret, path, mode);
136 ID0setuser();
137 return ret;
138}
139
140int
141ID0open(const char *path, int flags, ...)
142{
143 int ret;
144 va_list ap;
145
146 va_start(ap, flags);
147 ID0set0();
148 ret = open(path, flags, va_arg(ap, int));
149 log_Printf(LogID0, "%d = open(\"%s\", %d)\n", ret, path, flags);
150 ID0setuser();
151 va_end(ap);
152 return ret;
153}
154
155int
156ID0write(int fd, const void *data, size_t len)
157{
158 int ret;
159
160 ID0set0();
161 ret = write(fd, data, len);
162 log_Printf(LogID0, "%d = write(%d, data, %ld)\n", ret, fd, (long)len);
163 ID0setuser();
164 return ret;
165}
166
167int
168ID0uu_lock(const char *basettyname)
169{
170 int ret;
171
172 ID0set0();
173 ret = uu_lock(basettyname);
174 log_Printf(LogID0, "%d = uu_lock(\"%s\")\n", ret, basettyname);
175 ID0setuser();
176 return ret;
177}
178
179int
180ID0uu_lock_txfr(const char *basettyname, pid_t newpid)
181{
182 int ret;
183
184 ID0set0();
185 ret = uu_lock_txfr(basettyname, newpid);
186 log_Printf(LogID0, "%d = uu_lock_txfr(\"%s\", %ld)\n", ret, basettyname,
187 (long)newpid);
188 ID0setuser();
189 return ret;
190}
191
192int
193ID0uu_unlock(const char *basettyname)
194{
195 int ret;
196
197 ID0set0();
198 ret = uu_unlock(basettyname);
199 log_Printf(LogID0, "%d = uu_unlock(\"%s\")\n", ret, basettyname);
200 ID0setuser();
201 return ret;
202}
203
204void
205ID0login(const struct utmpx *ut)
206{
207 ID0set0();
208 pututxline(ut);
209 log_Printf(LogID0, "pututxline(\"%.*s\", \"%.*s\", \"%.*s\", \"%.*s\")\n",
210 (int)sizeof ut->ut_id, ut->ut_id,
211 (int)sizeof ut->ut_user, ut->ut_user,
212 (int)sizeof ut->ut_line, ut->ut_line,
213 (int)sizeof ut->ut_host, ut->ut_host);
214 ID0setuser();
215}
216
217void
218ID0logout(const struct utmpx *ut)
219{
220 ID0set0();
221 pututxline(ut);
222 log_Printf(LogID0, "pututxline(\"%.*s\")\n",
223 (int)sizeof ut->ut_id, ut->ut_id);
224 ID0setuser();
225}
226
227int
228ID0bind_un(int s, const struct sockaddr_un *name)
229{
230 int result;
231
232 ID0set0();
233 result = bind(s, (const struct sockaddr *)name, sizeof *name);
234 log_Printf(LogID0, "%d = bind(%d, \"%s\", %d)\n",
235 result, s, name->sun_path, (int)sizeof(*name));
236 ID0setuser();
237 return result;
238}
239
240int
241ID0connect_un(int s, const struct sockaddr_un *name)
242{
243 int result;
244
245 ID0set0();
246 result = connect(s, (const struct sockaddr *)name, sizeof *name);
247 log_Printf(LogID0, "%d = connect(%d, \"%s\", %d)\n",
248 result, s, name->sun_path, (int)sizeof(*name));
249 ID0setuser();
250 return result;
251}
252
253int
254ID0kill(pid_t pid, int sig)
255{
256 int result;
257
258 ID0set0();
259 result = kill(pid, sig);
260 log_Printf(LogID0, "%d = kill(%ld, %d)\n", result, (long)pid, sig);
261 ID0setuser();
262 return result;
263}
264
265#if defined(__FreeBSD__) && !defined(NOKLDLOAD)
266int
267ID0kldload(const char *dev)
268{
269 int result;
270
271 ID0set0();
272 result = kldload(dev);
273 log_Printf(LogID0, "%d = kldload(\"%s\")\n", result, dev);
274 ID0setuser();
275 return result;
276}
277#endif
278
279#ifndef NONETGRAPH
280int
281ID0NgMkSockNode(const char *name, int *cs, int *ds)
282{
283 int result;
284
285 ID0set0();
286 result = NgMkSockNode(name, cs, ds);
287 log_Printf(LogID0, "%d = NgMkSockNode(\"%s\", &cs, &ds)\n",
288 result, name ? name : "");
289 ID0setuser();
290 return result;
291}
292#endif