NetBSD-5.0.2/sys/compat/linux/common/linux_uid16.c
/* $NetBSD: linux_uid16.c,v 1.3 2008/05/20 15:48:24 njoly Exp $ */
/*-
* Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Frank van der Linden and Eric Haszlakiewicz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: linux_uid16.c,v 1.3 2008/05/20 15:48:24 njoly Exp $");
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/kauth.h>
#include <sys/syscallargs.h>
#include <compat/linux/common/linux_types.h>
#include <compat/linux/common/linux_signal.h>
#include <compat/linux/linux_syscallargs.h>
#define LINUXTOBSD_UID(u) \
(((u) == (linux_uid16_t)-1) ? -1 : (u))
#define LINUXTOBSD_GID(g) \
(((g) == (linux_gid16_t)-1) ? -1 : (g))
#define BSDTOLINUX_UID(u) \
(((u) & ~0xffff) ? (linux_uid16_t)65534 : (linux_uid16_t)(u))
#define BSDTOLINUX_GID(g) \
(((g) & ~0xffff) ? (linux_gid16_t)65534 : (linux_gid16_t)(g))
#ifndef COMPAT_LINUX32
int
linux_sys_chown16(struct lwp *l, const struct linux_sys_chown16_args *uap, register_t *retval)
{
/* {
syscallarg(const char *) path;
syscallarg(linux_uid16_t) uid;
syscallarg(linux_gid16_t) gid;
} */
struct sys___posix_chown_args bca;
SCARG(&bca, path) = SCARG(uap, path);
SCARG(&bca, uid) = LINUXTOBSD_UID(SCARG(uap, uid));
SCARG(&bca, gid) = LINUXTOBSD_GID(SCARG(uap, gid));
return sys___posix_chown(l, &bca, retval);
}
int
linux_sys_fchown16(struct lwp *l, const struct linux_sys_fchown16_args *uap, register_t *retval)
{
/* {
syscallarg(int) fd;
syscallarg(linux_uid16_t) uid;
syscallarg(linux_gid16_t) gid;
} */
struct sys___posix_fchown_args bfa;
SCARG(&bfa, fd) = SCARG(uap, fd);
SCARG(&bfa, uid) = LINUXTOBSD_UID(SCARG(uap, uid));
SCARG(&bfa, gid) = LINUXTOBSD_GID(SCARG(uap, gid));
return sys___posix_fchown(l, &bfa, retval);
}
int
linux_sys_lchown16(struct lwp *l, const struct linux_sys_lchown16_args *uap, register_t *retval)
{
/* {
syscallarg(char *) path;
syscallarg(linux_uid16_t) uid;
syscallarg(linux_gid16_t) gid;
} */
struct sys___posix_lchown_args bla;
SCARG(&bla, path) = SCARG(uap, path);
SCARG(&bla, uid) = LINUXTOBSD_UID(SCARG(uap, uid));
SCARG(&bla, gid) = LINUXTOBSD_GID(SCARG(uap, gid));
return sys___posix_lchown(l, &bla, retval);
}
int
linux_sys_setreuid16(struct lwp *l, const struct linux_sys_setreuid16_args *uap, register_t *retval)
{
/* {
syscallarg(linux_uid16_t) ruid;
syscallarg(linux_uid16_t) euid;
} */
struct sys_setreuid_args bsa;
SCARG(&bsa, ruid) = LINUXTOBSD_UID(SCARG(uap, ruid));
SCARG(&bsa, euid) = LINUXTOBSD_UID(SCARG(uap, euid));
return sys_setreuid(l, &bsa, retval);
}
int
linux_sys_setregid16(struct lwp *l, const struct linux_sys_setregid16_args *uap, register_t *retval)
{
/* {
syscallarg(linux_gid16_t) rgid;
syscallarg(linux_gid16_t) egid;
} */
struct sys_setregid_args bsa;
SCARG(&bsa, rgid) = LINUXTOBSD_GID(SCARG(uap, rgid));
SCARG(&bsa, egid) = LINUXTOBSD_GID(SCARG(uap, egid));
return sys_setregid(l, &bsa, retval);
}
int
linux_sys_setresuid16(struct lwp *l, const struct linux_sys_setresuid16_args *uap, register_t *retval)
{
/* {
syscallarg(linux_uid16_t) ruid;
syscallarg(linux_uid16_t) euid;
syscallarg(linux_uid16_t) suid;
} */
struct linux_sys_setresuid_args lsa;
SCARG(&lsa, ruid) = LINUXTOBSD_UID(SCARG(uap, ruid));
SCARG(&lsa, euid) = LINUXTOBSD_UID(SCARG(uap, euid));
SCARG(&lsa, suid) = LINUXTOBSD_UID(SCARG(uap, suid));
return linux_sys_setresuid(l, &lsa, retval);
}
int
linux_sys_setresgid16(struct lwp *l, const struct linux_sys_setresgid16_args *uap, register_t *retval)
{
/* {
syscallarg(linux_gid16_t) rgid;
syscallarg(linux_gid16_t) egid;
syscallarg(linux_gid16_t) sgid;
} */
struct linux_sys_setresgid_args lsa;
SCARG(&lsa, rgid) = LINUXTOBSD_GID(SCARG(uap, rgid));
SCARG(&lsa, egid) = LINUXTOBSD_GID(SCARG(uap, egid));
SCARG(&lsa, sgid) = LINUXTOBSD_GID(SCARG(uap, sgid));
return linux_sys_setresgid(l, &lsa, retval);
}
int
linux_sys_getresuid16(struct lwp *l, const struct linux_sys_getresuid16_args *uap, register_t *retval)
{
/* {
syscallarg(linux_uid16_t *) ruid;
syscallarg(linux_uid16_t *) euid;
syscallarg(linux_uid16_t *) suid;
} */
kauth_cred_t pc = l->l_cred;
int error;
uid_t buid;
linux_uid16_t luid;
buid = kauth_cred_getuid(pc);
luid = BSDTOLINUX_UID(buid);
if ((error = copyout(&luid, SCARG(uap, ruid), sizeof(luid))) != 0)
return error;
buid = kauth_cred_geteuid(pc);
luid = BSDTOLINUX_UID(buid);
if ((error = copyout(&luid, SCARG(uap, euid), sizeof(luid))) != 0)
return error;
buid = kauth_cred_getsvuid(pc);
luid = BSDTOLINUX_UID(buid);
return (copyout(&luid, SCARG(uap, suid), sizeof(luid)));
}
int
linux_sys_getresgid16(struct lwp *l, const struct linux_sys_getresgid16_args *uap, register_t *retval)
{
/* {
syscallarg(linux_gid16_t *) rgid;
syscallarg(linux_gid16_t *) egid;
syscallarg(linux_gid16_t *) sgid;
} */
kauth_cred_t pc = l->l_cred;
int error;
gid_t bgid;
linux_gid16_t lgid;
bgid = kauth_cred_getgid(pc);
lgid = BSDTOLINUX_GID(bgid);
if ((error = copyout(&lgid, SCARG(uap, rgid), sizeof(lgid))) != 0)
return error;
bgid = kauth_cred_getegid(pc);
lgid = BSDTOLINUX_GID(bgid);
if ((error = copyout(&lgid, SCARG(uap, egid), sizeof(lgid))) != 0)
return error;
bgid = kauth_cred_getsvgid(pc);
lgid = BSDTOLINUX_GID(bgid);
return (copyout(&lgid, SCARG(uap, sgid), sizeof(lgid)));
}
#endif /* !COMPAT_LINUX32 */
int
linux_sys_getgroups16(struct lwp *l, const struct linux_sys_getgroups16_args *uap, register_t *retval)
{
/* {
syscallarg(int) gidsetsize;
syscallarg(linux_gid16_t *) gidset;
} */
linux_gid16_t lset[16];
linux_gid16_t *gidset;
unsigned int ngrps;
int i, n, j;
int error;
ngrps = kauth_cred_ngroups(l->l_cred);
*retval = ngrps;
if (SCARG(uap, gidsetsize) == 0)
return 0;
if (SCARG(uap, gidsetsize) < ngrps)
return EINVAL;
gidset = SCARG(uap, gidset);
for (i = 0; i < (n = ngrps); i += n, gidset += n) {
n -= i;
if (n > __arraycount(lset))
n = __arraycount(lset);
for (j = 0; j < n; j++)
lset[j] = kauth_cred_group(l->l_cred, i + j);
error = copyout(lset, gidset, n * sizeof(lset[0]));
if (error != 0)
return error;
}
return 0;
}
/*
* It is very unlikly that any problem using 16bit groups is written
* to allow for more than 16 of them, so don't bother trying to
* support that.
*/
#define COMPAT_NGROUPS16 16
int
linux_sys_setgroups16(struct lwp *l, const struct linux_sys_setgroups16_args *uap, register_t *retval)
{
/* {
syscallarg(int) gidsetsize;
syscallarg(linux_gid16_t *) gidset;
} */
linux_gid16_t lset[COMPAT_NGROUPS16];
kauth_cred_t ncred;
int error;
gid_t grbuf[COMPAT_NGROUPS16];
unsigned int i, ngroups = SCARG(uap, gidsetsize);
if (ngroups > COMPAT_NGROUPS16)
return EINVAL;
error = copyin(SCARG(uap, gidset), lset, ngroups);
if (error != 0)
return error;
for (i = 0; i < ngroups; i++)
grbuf[i] = lset[i];
ncred = kauth_cred_alloc();
error = kauth_cred_setgroups(ncred, grbuf, SCARG(uap, gidsetsize),
-1, UIO_SYSSPACE);
if (error != 0) {
kauth_cred_free(ncred);
return error;
}
return kauth_proc_setgroups(l, ncred);
}