1 /* $NetBSD: linux32_uid16.c,v 1.2 2008/11/19 18:36:04 ad Exp $ */
2
3 /*-
4 * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
5 * Copyright (c) 2008 Nicolas Joly, all rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Emmanuel Dreyfus
18 * 4. The name of the author may not be used to endorse or promote
19 * products derived from this software without specific prior written
20 * permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
24 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 __KERNEL_RCSID(0, "$NetBSD: linux32_uid16.c,v 1.2 2008/11/19 18:36:04 ad Exp $");
37
38 #include <sys/param.h>
39 #include <sys/proc.h>
40 #include <sys/kauth.h>
41
42 #include <compat/netbsd32/netbsd32.h>
43
44 #include <compat/linux/common/linux_types.h>
45 #include <compat/linux/common/linux_signal.h>
46 #include <compat/linux/common/linux_ipc.h>
47 #include <compat/linux/common/linux_sem.h>
48 #include <compat/linux/linux_syscallargs.h>
49
50 #include <compat/linux32/common/linux32_types.h>
51 #include <compat/linux32/common/linux32_signal.h>
52 #include <compat/linux32/common/linux32_machdep.h>
53 #include <compat/linux32/linux32_syscallargs.h>
54
55 #define LINUX32TOBSD_UID(u) \
56 (((u) == (linux32_uid16_t)-1) ? -1 : (u))
57 #define LINUX32TOBSD_GID(g) \
58 (((g) == (linux32_gid16_t)-1) ? -1 : (g))
59
60 #define BSDTOLINUX32_UID(u) \
61 (((u) & ~0xffff) ? (linux32_uid16_t)65534 : (linux32_uid16_t)(u))
62 #define BSDTOLINUX32_GID(g) \
63 (((g) & ~0xffff) ? (linux32_gid16_t)65534 : (linux32_gid16_t)(g))
64
65 int
linux32_sys_chown16(struct lwp * l,const struct linux32_sys_chown16_args * uap,register_t * retval)66 linux32_sys_chown16(struct lwp *l, const struct linux32_sys_chown16_args *uap, register_t *retval)
67 {
68 /* {
69 syscallarg(const netbsd32_charp) path;
70 syscallarg(linux32_uid16_t) uid;
71 syscallarg(linux32_gid16_t) gid;
72 } */
73 struct sys___posix_chown_args ua;
74
75 NETBSD32TOP_UAP(path, const char);
76 SCARG(&ua, uid) = LINUX32TOBSD_UID(SCARG(uap, uid));
77 SCARG(&ua, gid) = LINUX32TOBSD_GID(SCARG(uap, gid));
78
79 return sys___posix_chown(l, &ua, retval);
80 }
81
82 int
linux32_sys_lchown16(struct lwp * l,const struct linux32_sys_lchown16_args * uap,register_t * retval)83 linux32_sys_lchown16(struct lwp *l, const struct linux32_sys_lchown16_args *uap, register_t *retval)
84 {
85 /* {
86 syscallarg(const netbsd32_charp) path;
87 syscallarg(linux32_uid16_t) uid;
88 syscallarg(linux32_gid16_t) gid;
89 } */
90 struct sys___posix_lchown_args ua;
91
92 NETBSD32TOP_UAP(path, const char);
93 SCARG(&ua, uid) = LINUX32TOBSD_UID(SCARG(uap, uid));
94 SCARG(&ua, gid) = LINUX32TOBSD_GID(SCARG(uap, gid));
95
96 return sys___posix_lchown(l, &ua, retval);
97 }
98
99 int
linux32_sys_fchown16(struct lwp * l,const struct linux32_sys_fchown16_args * uap,register_t * retval)100 linux32_sys_fchown16(struct lwp *l, const struct linux32_sys_fchown16_args *uap, register_t *retval)
101 {
102 /* {
103 syscallarg(int) fd;
104 syscallarg(linux32_uid16_t) uid;
105 syscallarg(linux32_gid16_t) gid;
106 } */
107 struct sys___posix_fchown_args ua;
108
109 SCARG(&ua, fd) = SCARG(uap, fd);
110 SCARG(&ua, uid) = LINUX32TOBSD_UID(SCARG(uap, uid));
111 SCARG(&ua, gid) = LINUX32TOBSD_GID(SCARG(uap, gid));
112
113 return sys___posix_fchown(l, &ua, retval);
114 }
115
116 int
linux32_sys_getgroups16(struct lwp * l,const struct linux32_sys_getgroups16_args * uap,register_t * retval)117 linux32_sys_getgroups16(struct lwp *l, const struct linux32_sys_getgroups16_args *uap, register_t *retval)
118 {
119 /* {
120 syscallarg(int) gidsetsize;
121 syscallarg(linux32_gid16p_t) gidset;
122 } */
123 struct linux_sys_getgroups16_args ua;
124
125 NETBSD32TO64_UAP(gidsetsize);
126 NETBSD32TOP_UAP(gidset, linux_gid16_t);
127
128 return linux_sys_getgroups16(l, &ua, retval);
129 }
130
131 int
linux32_sys_setgroups16(struct lwp * l,const struct linux32_sys_setgroups16_args * uap,register_t * retval)132 linux32_sys_setgroups16(struct lwp *l, const struct linux32_sys_setgroups16_args *uap, register_t *retval)
133 {
134 /* {
135 syscallarg(int) gidsetsize;
136 syscallarg(linux32_gid16p_t) gidset;
137 } */
138 struct linux_sys_setgroups16_args ua;
139
140 NETBSD32TO64_UAP(gidsetsize);
141 NETBSD32TOP_UAP(gidset, linux_gid16_t);
142
143 return linux_sys_setgroups16(l, &ua, retval);
144 }
145
146 int
linux32_sys_setreuid16(struct lwp * l,const struct linux32_sys_setreuid16_args * uap,register_t * retval)147 linux32_sys_setreuid16(struct lwp *l, const struct linux32_sys_setreuid16_args *uap, register_t *retval)
148 {
149 /* {
150 syscallarg(linux32_uid16_t) ruid;
151 syscallarg(linux32_uid16_t) euid;
152 } */
153 struct sys_setreuid_args bsa;
154
155 SCARG(&bsa, ruid) = LINUX32TOBSD_UID(SCARG(uap, ruid));
156 SCARG(&bsa, euid) = LINUX32TOBSD_UID(SCARG(uap, euid));
157
158 return sys_setreuid(l, &bsa, retval);
159 }
160
161 int
linux32_sys_setregid16(struct lwp * l,const struct linux32_sys_setregid16_args * uap,register_t * retval)162 linux32_sys_setregid16(struct lwp *l, const struct linux32_sys_setregid16_args *uap, register_t *retval)
163 {
164 /* {
165 syscallarg(linux32_gid16_t) rgid;
166 syscallarg(linux32_gid16_t) egid;
167 } */
168 struct sys_setregid_args bsa;
169
170 SCARG(&bsa, rgid) = LINUX32TOBSD_GID(SCARG(uap, rgid));
171 SCARG(&bsa, egid) = LINUX32TOBSD_GID(SCARG(uap, egid));
172
173 return sys_setregid(l, &bsa, retval);
174 }
175
176 int
linux32_sys_setresuid16(struct lwp * l,const struct linux32_sys_setresuid16_args * uap,register_t * retval)177 linux32_sys_setresuid16(struct lwp *l, const struct linux32_sys_setresuid16_args *uap, register_t *retval)
178 {
179 /* {
180 syscallarg(linux32_uid16_t) ruid;
181 syscallarg(linux32_uid16_t) euid;
182 syscallarg(linux32_uid16_t) suid;
183 } */
184 struct linux32_sys_setresuid_args lsa;
185
186 SCARG(&lsa, ruid) = LINUX32TOBSD_UID(SCARG(uap, ruid));
187 SCARG(&lsa, euid) = LINUX32TOBSD_UID(SCARG(uap, euid));
188 SCARG(&lsa, suid) = LINUX32TOBSD_UID(SCARG(uap, suid));
189
190 return linux32_sys_setresuid(l, &lsa, retval);
191 }
192
193 int
linux32_sys_setresgid16(struct lwp * l,const struct linux32_sys_setresgid16_args * uap,register_t * retval)194 linux32_sys_setresgid16(struct lwp *l, const struct linux32_sys_setresgid16_args *uap, register_t *retval)
195 {
196 /* {
197 syscallarg(linux32_gid16_t) rgid;
198 syscallarg(linux32_gid16_t) egid;
199 syscallarg(linux32_gid16_t) sgid;
200 } */
201 struct linux32_sys_setresgid_args lsa;
202
203 SCARG(&lsa, rgid) = LINUX32TOBSD_GID(SCARG(uap, rgid));
204 SCARG(&lsa, egid) = LINUX32TOBSD_GID(SCARG(uap, egid));
205 SCARG(&lsa, sgid) = LINUX32TOBSD_GID(SCARG(uap, sgid));
206
207 return linux32_sys_setresgid(l, &lsa, retval);
208 }
209
210 int
linux32_sys_getresuid16(struct lwp * l,const struct linux32_sys_getresuid16_args * uap,register_t * retval)211 linux32_sys_getresuid16(struct lwp *l, const struct linux32_sys_getresuid16_args *uap, register_t *retval)
212 {
213 /* {
214 syscallarg(linux32_uid16p_t) ruid;
215 syscallarg(linux32_uid16p_t) euid;
216 syscallarg(linux32_uid16p_t) suid;
217 } */
218 kauth_cred_t pc = l->l_cred;
219 int error;
220 uid_t buid;
221 linux32_uid16_t luid;
222
223 buid = kauth_cred_getuid(pc);
224 luid = BSDTOLINUX32_UID(buid);
225 if ((error = copyout(&luid, SCARG_P32(uap, ruid), sizeof(luid))) != 0)
226 return error;
227
228 buid = kauth_cred_geteuid(pc);
229 luid = BSDTOLINUX32_UID(buid);
230 if ((error = copyout(&luid, SCARG_P32(uap, euid), sizeof(luid))) != 0)
231 return error;
232
233 buid = kauth_cred_getsvuid(pc);
234 luid = BSDTOLINUX32_UID(buid);
235 return (copyout(&luid, SCARG_P32(uap, suid), sizeof(luid)));
236 }
237
238 int
linux32_sys_getresgid16(struct lwp * l,const struct linux32_sys_getresgid16_args * uap,register_t * retval)239 linux32_sys_getresgid16(struct lwp *l, const struct linux32_sys_getresgid16_args *uap, register_t *retval)
240 {
241 /* {
242 syscallarg(linux32_gid16p_t) rgid;
243 syscallarg(linux32_gid16p_t) egid;
244 syscallarg(linux32_gid16p_t) sgid;
245 } */
246 kauth_cred_t pc = l->l_cred;
247 int error;
248 gid_t bgid;
249 linux32_gid16_t lgid;
250
251 bgid = kauth_cred_getgid(pc);
252 lgid = BSDTOLINUX32_GID(bgid);
253 if ((error = copyout(&lgid, SCARG_P32(uap, rgid), sizeof(lgid))) != 0)
254 return error;
255
256 bgid = kauth_cred_getegid(pc);
257 lgid = BSDTOLINUX32_GID(bgid);
258 if ((error = copyout(&lgid, SCARG_P32(uap, egid), sizeof(lgid))) != 0)
259 return error;
260
261 bgid = kauth_cred_getsvgid(pc);
262 lgid = BSDTOLINUX32_GID(bgid);
263 return (copyout(&lgid, SCARG_P32(uap, sgid), sizeof(lgid)));
264 }
265