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
;