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 $
29 #include "opt_compat.h"
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/kern_syscall.h>
34 #include <sys/nlookup.h>
37 #include <sys/sysproto.h>
38 #include <sys/thread.h>
40 #include <sys/mplock2.h>
42 #include <arch_linux/linux.h>
43 #include <arch_linux/linux_proto.h>
44 #include "linux_util.h"
51 #define CAST_NOCHG(x) ((x == 0xFFFF) ? -1 : x)
57 sys_linux_chown16(struct linux_chown16_args *args)
59 struct nlookupdata nd;
63 error = linux_copyin_path(args->path, &path, LINUX_PATH_EXISTS);
68 kprintf(ARGS(chown16, "%s, %d, %d"), path, args->uid,
72 error = nlookup_init(&nd, path, UIO_SYSSPACE, NLC_FOLLOW);
74 error = kern_chown(&nd, CAST_NOCHG(args->uid),
75 CAST_NOCHG(args->gid));
79 linux_free_path(&path);
87 sys_linux_lchown16(struct linux_lchown16_args *args)
89 struct nlookupdata nd;
93 error = linux_copyin_path(args->path, &path, LINUX_PATH_EXISTS);
98 kprintf(ARGS(lchown16, "%s, %d, %d"), path, args->uid,
102 error = nlookup_init(&nd, path, UIO_SYSSPACE, 0);
104 error = kern_chown(&nd, CAST_NOCHG(args->uid),
105 CAST_NOCHG(args->gid));
109 linux_free_path(&path);
117 sys_linux_setgroups16(struct linux_setgroups16_args *args)
119 struct thread *td = curthread;
120 struct proc *p = td->td_proc;
121 struct ucred *newcred, *oldcred;
122 l_gid16_t linux_gidset[NGROUPS];
127 if (ldebug(setgroups16))
128 kprintf(ARGS(setgroups16, "%d, *"), args->gidsetsize);
131 ngrp = args->gidsetsize;
132 oldcred = td->td_ucred;
135 * cr_groups[0] holds egid. Setting the whole set from
136 * the supplied set will cause egid to be changed too.
137 * Keep cr_groups[0] unchanged to prevent that.
140 if ((error = priv_check_cred(oldcred, PRIV_CRED_SETGROUPS, 0)) != 0)
143 if ((u_int)ngrp >= NGROUPS)
147 newcred = crdup(oldcred);
149 error = copyin((caddr_t)args->gidset, linux_gidset,
150 ngrp * sizeof(l_gid16_t));
156 newcred->cr_ngroups = ngrp + 1;
158 bsd_gidset = newcred->cr_groups;
161 bsd_gidset[ngrp + 1] = linux_gidset[ngrp];
165 newcred->cr_ngroups = 1;
169 oldcred = p->p_ucred; /* deal with threads race */
170 p->p_ucred = newcred;
182 sys_linux_getgroups16(struct linux_getgroups16_args *args)
184 struct proc *p = curproc;
186 l_gid16_t linux_gidset[NGROUPS];
188 int bsd_gidsetsz, ngrp, error;
191 if (ldebug(getgroups16))
192 kprintf(ARGS(getgroups16, "%d, *"), args->gidsetsize);
196 bsd_gidset = cred->cr_groups;
197 bsd_gidsetsz = cred->cr_ngroups - 1;
200 * cr_groups[0] holds egid. Returning the whole set
201 * here will cause a duplicate. Exclude cr_groups[0]
205 if ((ngrp = args->gidsetsize) == 0) {
206 args->sysmsg_result = bsd_gidsetsz;
210 if ((u_int)ngrp < (u_int)bsd_gidsetsz)
214 while (ngrp < bsd_gidsetsz) {
215 linux_gidset[ngrp] = bsd_gidset[ngrp + 1];
219 error = copyout(linux_gidset, (caddr_t)args->gidset,
220 ngrp * sizeof(l_gid16_t));
224 args->sysmsg_result = ngrp;
229 * The FreeBSD native getgid(2) and getuid(2) also modify p->p_retval[1]
230 * when COMPAT_43 is defined. This globbers registers that
231 * are assumed to be preserved. The following lightweight syscalls fixes
232 * this. See also linux_getpid(2), linux_getgid(2) and linux_getuid(2) in
235 * linux_getgid16() - MP SAFE
236 * linux_getuid16() - MP SAFE
243 sys_linux_getgid16(struct linux_getgid16_args *args)
245 struct proc *p = curproc;
247 args->sysmsg_result = p->p_ucred->cr_rgid;
255 sys_linux_getuid16(struct linux_getuid16_args *args)
257 struct proc *p = curproc;
259 args->sysmsg_result = p->p_ucred->cr_ruid;
267 sys_linux_getegid16(struct linux_getegid16_args *args)
269 struct getegid_args bsd;
272 bsd.sysmsg_result = 0;
274 error = sys_getegid(&bsd);
275 args->sysmsg_result = bsd.sysmsg_result;
283 sys_linux_geteuid16(struct linux_geteuid16_args *args)
285 struct geteuid_args bsd;
288 bsd.sysmsg_result = 0;
290 error = sys_geteuid(&bsd);
291 args->sysmsg_result = bsd.sysmsg_result;
299 sys_linux_setgid16(struct linux_setgid16_args *args)
301 struct setgid_args bsd;
305 bsd.sysmsg_result = 0;
307 error = sys_setgid(&bsd);
308 args->sysmsg_result = bsd.sysmsg_result;
316 sys_linux_setuid16(struct linux_setuid16_args *args)
318 struct setuid_args bsd;
322 bsd.sysmsg_result = 0;
324 error = sys_setuid(&bsd);
325 args->sysmsg_result = bsd.sysmsg_result;
333 sys_linux_setregid16(struct linux_setregid16_args *args)
335 struct setregid_args bsd;
338 bsd.rgid = CAST_NOCHG(args->rgid);
339 bsd.egid = CAST_NOCHG(args->egid);
340 bsd.sysmsg_result = 0;
342 error = sys_setregid(&bsd);
343 args->sysmsg_result = bsd.sysmsg_result;
351 sys_linux_setreuid16(struct linux_setreuid16_args *args)
353 struct setreuid_args bsd;
356 bsd.ruid = CAST_NOCHG(args->ruid);
357 bsd.euid = CAST_NOCHG(args->euid);
358 bsd.sysmsg_result = 0;
360 error = sys_setreuid(&bsd);
361 args->sysmsg_result = bsd.sysmsg_result;
369 sys_linux_setresgid16(struct linux_setresgid16_args *args)
371 struct setresgid_args bsd;
374 bsd.rgid = CAST_NOCHG(args->rgid);
375 bsd.egid = CAST_NOCHG(args->egid);
376 bsd.sgid = CAST_NOCHG(args->sgid);
377 bsd.sysmsg_result = 0;
379 error = sys_setresgid(&bsd);
380 args->sysmsg_result = bsd.sysmsg_result;
388 sys_linux_setresuid16(struct linux_setresuid16_args *args)
390 struct setresuid_args bsd;
393 bsd.ruid = CAST_NOCHG(args->ruid);
394 bsd.euid = CAST_NOCHG(args->euid);
395 bsd.suid = CAST_NOCHG(args->suid);
396 bsd.sysmsg_result = 0;
398 error = sys_setresuid(&bsd);
399 args->sysmsg_result = bsd.sysmsg_result;