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/* $OpenBSD: kern_prot_43.c,v 1.2 1996/08/02 20:34:42 niklas Exp $ */
/* $NetBSD: kern_prot_43.c,v 1.3 1995/10/07 06:26:27 mycroft Exp $ */
/*
* Copyright (c) 1982, 1986, 1989, 1990, 1991, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)kern_prot.c 8.6 (Berkeley) 1/21/94
*/
#include <sys/param.h>
#include <sys/acct.h>
#include <sys/systm.h>
#include <sys/ucred.h>
#include <sys/proc.h>
#include <sys/timeb.h>
#include <sys/times.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/syscallargs.h>
/* ARGSUSED */
int
compat_43_sys_setregid(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct compat_43_sys_setregid_args /* {
syscallarg(int) rgid;
syscallarg(int) egid;
} */ *uap = v;
struct sys_setegid_args segidargs;
struct sys_setgid_args sgidargs;
/*
* There are five cases, described above in osetreuid()
*/
if (SCARG(uap, rgid) == (gid_t)-1) {
if (SCARG(uap, egid) == (gid_t)-1)
return (0); /* -1, -1 */
SCARG(&segidargs, egid) = SCARG(uap, egid); /* -1, N */
return (sys_setegid(p, &segidargs, retval));
}
if (SCARG(uap, egid) == (gid_t)-1) {
SCARG(&segidargs, egid) = SCARG(uap, rgid); /* N, -1 */
return (sys_setegid(p, &segidargs, retval));
}
SCARG(&sgidargs, gid) = SCARG(uap, rgid); /* N, N and N, M */
return (sys_setgid(p, &sgidargs, retval));
}
/* ARGSUSED */
int
compat_43_sys_setreuid(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct compat_43_sys_setreuid_args /* {
syscallarg(int) ruid;
syscallarg(int) euid;
} */ *uap = v;
struct sys_seteuid_args seuidargs;
struct sys_setuid_args suidargs;
/*
* There are five cases, and we attempt to emulate them in
* the following fashion:
* -1, -1: return 0. This is correct emulation.
* -1, N: call seteuid(N). This is correct emulation.
* N, -1: if we called setuid(N), our euid would be changed
* to N as well. the theory is that we don't want to
* revoke root access yet, so we call seteuid(N)
* instead. This is incorrect emulation, but often
* suffices enough for binary compatibility.
* N, N: call setuid(N). This is correct emulation.
* N, M: call setuid(N). This is close to correct emulation.
*/
if (SCARG(uap, ruid) == (uid_t)-1) {
if (SCARG(uap, euid) == (uid_t)-1)
return (0); /* -1, -1 */
SCARG(&seuidargs, euid) = SCARG(uap, euid); /* -1, N */
return (sys_seteuid(p, &seuidargs, retval));
}
if (SCARG(uap, euid) == (uid_t)-1) {
SCARG(&seuidargs, euid) = SCARG(uap, ruid); /* N, -1 */
return (sys_seteuid(p, &seuidargs, retval));
}
SCARG(&suidargs, uid) = SCARG(uap, ruid); /* N, N and N, M */
return (sys_setuid(p, &suidargs, retval));
}
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