2 * Copyright (c) 2001 The FreeBSD Project
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
26 * $FreeBSD: src/sys/compat/linux/linux_uid16.c,v 1.4.2.1 2001/10/21 03:57:35 marcel Exp $
27 * $DragonFly: src/sys/emulation/linux/linux_uid16.c,v 1.12 2006/12/23 00:27:02 swildner Exp $
30 #include "opt_compat.h"
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kern_syscall.h>
35 #include <sys/nlookup.h>
38 #include <sys/sysproto.h>
39 #include <sys/thread.h>
41 #include <arch_linux/linux.h>
42 #include <arch_linux/linux_proto.h>
43 #include "linux_util.h"
50 #define CAST_NOCHG(x) ((x == 0xFFFF) ? -1 : x)
53 sys_linux_chown16(struct linux_chown16_args *args)
55 struct nlookupdata nd;
59 error = linux_copyin_path(args->path, &path, LINUX_PATH_EXISTS);
64 kprintf(ARGS(chown16, "%s, %d, %d"), path, args->uid,
67 error = nlookup_init(&nd, path, UIO_SYSSPACE, NLC_FOLLOW);
69 error = kern_chown(&nd, CAST_NOCHG(args->uid),
70 CAST_NOCHG(args->gid));
73 linux_free_path(&path);
78 sys_linux_lchown16(struct linux_lchown16_args *args)
80 struct nlookupdata nd;
84 error = linux_copyin_path(args->path, &path, LINUX_PATH_EXISTS);
89 kprintf(ARGS(lchown16, "%s, %d, %d"), path, args->uid,
92 error = nlookup_init(&nd, path, UIO_SYSSPACE, 0);
94 error = kern_chown(&nd, CAST_NOCHG(args->uid),
95 CAST_NOCHG(args->gid));
98 linux_free_path(&path);
103 sys_linux_setgroups16(struct linux_setgroups16_args *args)
105 struct proc *p = curproc;
106 struct ucred *newcred, *oldcred;
107 l_gid16_t linux_gidset[NGROUPS];
112 if (ldebug(setgroups16))
113 kprintf(ARGS(setgroups16, "%d, *"), args->gidsetsize);
116 ngrp = args->gidsetsize;
117 oldcred = p->p_ucred;
120 * cr_groups[0] holds egid. Setting the whole set from
121 * the supplied set will cause egid to be changed too.
122 * Keep cr_groups[0] unchanged to prevent that.
125 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0)
131 newcred = crdup(oldcred);
133 error = copyin((caddr_t)args->gidset, linux_gidset,
134 ngrp * sizeof(l_gid16_t));
140 newcred->cr_ngroups = ngrp + 1;
142 bsd_gidset = newcred->cr_groups;
145 bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
149 newcred->cr_ngroups = 1;
153 p->p_ucred = newcred;
159 sys_linux_getgroups16(struct linux_getgroups16_args *args)
161 struct proc *p = curproc;
163 l_gid16_t linux_gidset[NGROUPS];
165 int bsd_gidsetsz, ngrp, error;
168 if (ldebug(getgroups16))
169 kprintf(ARGS(getgroups16, "%d, *"), args->gidsetsize);
173 bsd_gidset = cred->cr_groups;
174 bsd_gidsetsz = cred->cr_ngroups - 1;
177 * cr_groups[0] holds egid. Returning the whole set
178 * here will cause a duplicate. Exclude cr_groups[0]
182 if ((ngrp = args->gidsetsize) == 0) {
183 args->sysmsg_result = bsd_gidsetsz;
187 if (ngrp < bsd_gidsetsz)
191 while (ngrp < bsd_gidsetsz) {
192 linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
196 error = copyout(linux_gidset, (caddr_t)args->gidset,
197 ngrp * sizeof(l_gid16_t));
201 args->sysmsg_result = ngrp;
206 * The FreeBSD native getgid(2) and getuid(2) also modify p->p_retval[1]
207 * when COMPAT_43 or COMPAT_SUNOS is defined. This globbers registers that
208 * are assumed to be preserved. The following lightweight syscalls fixes
209 * this. See also linux_getpid(2), linux_getgid(2) and linux_getuid(2) in
212 * linux_getgid16() - MP SAFE
213 * linux_getuid16() - MP SAFE
217 sys_linux_getgid16(struct linux_getgid16_args *args)
219 struct proc *p = curproc;
221 args->sysmsg_result = p->p_ucred->cr_rgid;
226 sys_linux_getuid16(struct linux_getuid16_args *args)
228 struct proc *p = curproc;
230 args->sysmsg_result = p->p_ucred->cr_ruid;
235 sys_linux_getegid16(struct linux_getegid16_args *args)
237 struct getegid_args bsd;
240 bsd.sysmsg_result = 0;
242 error = sys_getegid(&bsd);
243 args->sysmsg_result = bsd.sysmsg_result;
248 sys_linux_geteuid16(struct linux_geteuid16_args *args)
250 struct geteuid_args bsd;
253 bsd.sysmsg_result = 0;
255 error = sys_geteuid(&bsd);
256 args->sysmsg_result = bsd.sysmsg_result;
261 sys_linux_setgid16(struct linux_setgid16_args *args)
263 struct setgid_args bsd;
267 bsd.sysmsg_result = 0;
269 error = sys_setgid(&bsd);
270 args->sysmsg_result = bsd.sysmsg_result;
275 sys_linux_setuid16(struct linux_setuid16_args *args)
277 struct setuid_args bsd;
281 bsd.sysmsg_result = 0;
283 error = sys_setuid(&bsd);
284 args->sysmsg_result = bsd.sysmsg_result;
289 sys_linux_setregid16(struct linux_setregid16_args *args)
291 struct setregid_args bsd;
294 bsd.rgid = CAST_NOCHG(args->rgid);
295 bsd.egid = CAST_NOCHG(args->egid);
296 bsd.sysmsg_result = 0;
298 error = sys_setregid(&bsd);
299 args->sysmsg_result = bsd.sysmsg_result;
304 sys_linux_setreuid16(struct linux_setreuid16_args *args)
306 struct setreuid_args bsd;
309 bsd.ruid = CAST_NOCHG(args->ruid);
310 bsd.euid = CAST_NOCHG(args->euid);
311 bsd.sysmsg_result = 0;
313 error = sys_setreuid(&bsd);
314 args->sysmsg_result = bsd.sysmsg_result;
319 sys_linux_setresgid16(struct linux_setresgid16_args *args)
321 struct setresgid_args bsd;
324 bsd.rgid = CAST_NOCHG(args->rgid);
325 bsd.egid = CAST_NOCHG(args->egid);
326 bsd.sgid = CAST_NOCHG(args->sgid);
327 bsd.sysmsg_result = 0;
329 error = sys_setresgid(&bsd);
330 args->sysmsg_result = bsd.sysmsg_result;
335 sys_linux_setresuid16(struct linux_setresuid16_args *args)
337 struct setresuid_args bsd;
340 bsd.ruid = CAST_NOCHG(args->ruid);
341 bsd.euid = CAST_NOCHG(args->euid);
342 bsd.suid = CAST_NOCHG(args->suid);
343 bsd.sysmsg_result = 0;
345 error = sys_setresuid(&bsd);
346 args->sysmsg_result = bsd.sysmsg_result;