126 lines
4.6 KiB
C
126 lines
4.6 KiB
C
/* $NetBSD: kern_prot_43.c,v 1.3 1995/10/07 06:26:27 mycroft Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1989, 1990, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)kern_prot.c 8.6 (Berkeley) 1/21/94
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*/
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#include <sys/param.h>
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#include <sys/acct.h>
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#include <sys/systm.h>
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#include <sys/ucred.h>
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#include <sys/proc.h>
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#include <sys/timeb.h>
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#include <sys/times.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/syscallargs.h>
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/* ARGSUSED */
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int
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compat_43_sys_setregid(p, v, retval)
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register struct proc *p;
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void *v;
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register_t *retval;
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{
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struct compat_43_sys_setregid_args /* {
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syscallarg(int) rgid;
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syscallarg(int) egid;
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} */ *uap = v;
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struct sys_setegid_args segidargs;
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struct sys_setgid_args sgidargs;
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/*
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* There are five cases, described above in osetreuid()
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*/
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if (SCARG(uap, rgid) == (gid_t)-1) {
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if (SCARG(uap, egid) == (gid_t)-1)
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return (0); /* -1, -1 */
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SCARG(&segidargs, egid) = SCARG(uap, egid); /* -1, N */
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return (sys_setegid(p, &segidargs, retval));
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}
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if (SCARG(uap, egid) == (gid_t)-1) {
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SCARG(&segidargs, egid) = SCARG(uap, rgid); /* N, -1 */
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return (sys_setegid(p, &segidargs, retval));
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}
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SCARG(&sgidargs, gid) = SCARG(uap, rgid); /* N, N and N, M */
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return (sys_setgid(p, &sgidargs, retval));
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}
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/* ARGSUSED */
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int
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compat_43_sys_setreuid(p, v, retval)
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register struct proc *p;
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void *v;
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register_t *retval;
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{
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struct compat_43_sys_setreuid_args /* {
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syscallarg(int) ruid;
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syscallarg(int) euid;
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} */ *uap = v;
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struct sys_seteuid_args seuidargs;
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struct sys_setuid_args suidargs;
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/*
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* There are five cases, and we attempt to emulate them in
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* the following fashion:
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* -1, -1: return 0. This is correct emulation.
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* -1, N: call seteuid(N). This is correct emulation.
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* N, -1: if we called setuid(N), our euid would be changed
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* to N as well. the theory is that we don't want to
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* revoke root access yet, so we call seteuid(N)
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* instead. This is incorrect emulation, but often
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* suffices enough for binary compatibility.
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* N, N: call setuid(N). This is correct emulation.
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* N, M: call setuid(N). This is close to correct emulation.
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*/
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if (SCARG(uap, ruid) == (uid_t)-1) {
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if (SCARG(uap, euid) == (uid_t)-1)
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return (0); /* -1, -1 */
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SCARG(&seuidargs, euid) = SCARG(uap, euid); /* -1, N */
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return (sys_seteuid(p, &seuidargs, retval));
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}
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if (SCARG(uap, euid) == (uid_t)-1) {
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SCARG(&seuidargs, euid) = SCARG(uap, ruid); /* N, -1 */
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return (sys_seteuid(p, &seuidargs, retval));
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}
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SCARG(&suidargs, uid) = SCARG(uap, ruid); /* N, N and N, M */
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return (sys_setuid(p, &suidargs, retval));
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}
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