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 <sys/mplock2.h>
43 #include <arch_linux/linux.h>
44 #include <arch_linux/linux_proto.h>
45 #include "linux_util.h"
52 #define CAST_NOCHG(x) ((x == 0xFFFF) ? -1 : x)
58 sys_linux_chown16(struct linux_chown16_args *args)
60 struct nlookupdata nd;
64 error = linux_copyin_path(args->path, &path, LINUX_PATH_EXISTS);
69 kprintf(ARGS(chown16, "%s, %d, %d"), path, args->uid,
73 error = nlookup_init(&nd, path, UIO_SYSSPACE, NLC_FOLLOW);
75 error = kern_chown(&nd, CAST_NOCHG(args->uid),
76 CAST_NOCHG(args->gid));
80 linux_free_path(&path);
88 sys_linux_lchown16(struct linux_lchown16_args *args)
90 struct nlookupdata nd;
94 error = linux_copyin_path(args->path, &path, LINUX_PATH_EXISTS);
99 kprintf(ARGS(lchown16, "%s, %d, %d"), path, args->uid,
103 error = nlookup_init(&nd, path, UIO_SYSSPACE, 0);
105 error = kern_chown(&nd, CAST_NOCHG(args->uid),
106 CAST_NOCHG(args->gid));
110 linux_free_path(&path);
118 sys_linux_setgroups16(struct linux_setgroups16_args *args)
120 struct thread *td = curthread;
121 struct proc *p = td->td_proc;
122 struct ucred *newcred, *oldcred;
123 l_gid16_t linux_gidset[NGROUPS];
128 if (ldebug(setgroups16))
129 kprintf(ARGS(setgroups16, "%d, *"), args->gidsetsize);
132 ngrp = args->gidsetsize;
133 oldcred = td->td_ucred;
136 * cr_groups[0] holds egid. Setting the whole set from
137 * the supplied set will cause egid to be changed too.
138 * Keep cr_groups[0] unchanged to prevent that.
141 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0)
144 if ((u_int)ngrp >= NGROUPS)
148 newcred = crdup(oldcred);
150 error = copyin((caddr_t)args->gidset, linux_gidset,
151 ngrp * sizeof(l_gid16_t));
157 newcred->cr_ngroups = ngrp + 1;
159 bsd_gidset = newcred->cr_groups;
162 bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
166 newcred->cr_ngroups = 1;
170 oldcred = p->p_ucred; /* deal with threads race */
171 p->p_ucred = newcred;
183 sys_linux_getgroups16(struct linux_getgroups16_args *args)
185 struct proc *p = curproc;
187 l_gid16_t linux_gidset[NGROUPS];
189 int bsd_gidsetsz, ngrp, error;
192 if (ldebug(getgroups16))
193 kprintf(ARGS(getgroups16, "%d, *"), args->gidsetsize);
197 bsd_gidset = cred->cr_groups;
198 bsd_gidsetsz = cred->cr_ngroups - 1;
201 * cr_groups[0] holds egid. Returning the whole set
202 * here will cause a duplicate. Exclude cr_groups[0]
206 if ((ngrp = args->gidsetsize) == 0) {
207 args->sysmsg_result = bsd_gidsetsz;
211 if ((u_int)ngrp < (u_int)bsd_gidsetsz)
215 while (ngrp < bsd_gidsetsz) {
216 linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
220 error = copyout(linux_gidset, (caddr_t)args->gidset,
221 ngrp * sizeof(l_gid16_t));
225 args->sysmsg_result = ngrp;
230 * The FreeBSD native getgid(2) and getuid(2) also modify p->p_retval[1]
231 * when COMPAT_43 or COMPAT_SUNOS is defined. This globbers registers that
232 * are assumed to be preserved. The following lightweight syscalls fixes
233 * this. See also linux_getpid(2), linux_getgid(2) and linux_getuid(2) in
236 * linux_getgid16() - MP SAFE
237 * linux_getuid16() - MP SAFE
244 sys_linux_getgid16(struct linux_getgid16_args *args)
246 struct proc *p = curproc;
248 args->sysmsg_result = p->p_ucred->cr_rgid;
256 sys_linux_getuid16(struct linux_getuid16_args *args)
258 struct proc *p = curproc;
260 args->sysmsg_result = p->p_ucred->cr_ruid;
268 sys_linux_getegid16(struct linux_getegid16_args *args)
270 struct getegid_args bsd;
273 bsd.sysmsg_result = 0;
275 error = sys_getegid(&bsd);
276 args->sysmsg_result = bsd.sysmsg_result;
284 sys_linux_geteuid16(struct linux_geteuid16_args *args)
286 struct geteuid_args bsd;
289 bsd.sysmsg_result = 0;
291 error = sys_geteuid(&bsd);
292 args->sysmsg_result = bsd.sysmsg_result;
300 sys_linux_setgid16(struct linux_setgid16_args *args)
302 struct setgid_args bsd;
306 bsd.sysmsg_result = 0;
308 error = sys_setgid(&bsd);
309 args->sysmsg_result = bsd.sysmsg_result;
317 sys_linux_setuid16(struct linux_setuid16_args *args)
319 struct setuid_args bsd;
323 bsd.sysmsg_result = 0;
325 error = sys_setuid(&bsd);
326 args->sysmsg_result = bsd.sysmsg_result;
334 sys_linux_setregid16(struct linux_setregid16_args *args)
336 struct setregid_args bsd;
339 bsd.rgid = CAST_NOCHG(args->rgid);
340 bsd.egid = CAST_NOCHG(args->egid);
341 bsd.sysmsg_result = 0;
343 error = sys_setregid(&bsd);
344 args->sysmsg_result = bsd.sysmsg_result;
352 sys_linux_setreuid16(struct linux_setreuid16_args *args)
354 struct setreuid_args bsd;
357 bsd.ruid = CAST_NOCHG(args->ruid);
358 bsd.euid = CAST_NOCHG(args->euid);
359 bsd.sysmsg_result = 0;
361 error = sys_setreuid(&bsd);
362 args->sysmsg_result = bsd.sysmsg_result;
370 sys_linux_setresgid16(struct linux_setresgid16_args *args)
372 struct setresgid_args bsd;
375 bsd.rgid = CAST_NOCHG(args->rgid);
376 bsd.egid = CAST_NOCHG(args->egid);
377 bsd.sgid = CAST_NOCHG(args->sgid);
378 bsd.sysmsg_result = 0;
380 error = sys_setresgid(&bsd);
381 args->sysmsg_result = bsd.sysmsg_result;
389 sys_linux_setresuid16(struct linux_setresuid16_args *args)
391 struct setresuid_args bsd;
394 bsd.ruid = CAST_NOCHG(args->ruid);
395 bsd.euid = CAST_NOCHG(args->euid);
396 bsd.suid = CAST_NOCHG(args->suid);
397 bsd.sysmsg_result = 0;
399 error = sys_setresuid(&bsd);
400 args->sysmsg_result = bsd.sysmsg_result;