NetBSD/sys/compat/osf1/osf1_prot.c

145 lines
4.9 KiB
C

/* $NetBSD: osf1_prot.c,v 1.4 2001/11/13 02:09:14 lukem Exp $ */
/*
* Copyright (c) 1999 Christopher G. Demetriou. All rights reserved.
*
* 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 Christopher G. Demetriou
* for the NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* Copyright (c) 1994, 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: osf1_prot.c,v 1.4 2001/11/13 02:09:14 lukem Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/syscallargs.h>
#include <compat/osf1/osf1.h>
#include <compat/osf1/osf1_syscallargs.h>
#include <compat/osf1/osf1_cvt.h>
/*
* OSF/1 defines _POSIX_SAVED_IDS, which means that our normal
* setgid() won't work.
*
* If you change "uid" to "gid" in the discussion, below, about
* setuid(), you'll get a correct description of setgid().
*/
int
osf1_sys_setgid(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct osf1_sys_setgid_args *uap = v;
struct pcred *pc = p->p_cred;
gid_t gid = SCARG(uap, gid);
int error;
if ((error = suser(pc->pc_ucred, &p->p_acflag)) != 0 &&
gid != pc->p_rgid && gid != pc->p_svgid)
return (error);
pc->pc_ucred = crcopy(pc->pc_ucred);
pc->pc_ucred->cr_gid = gid;
if (error == 0) {
pc->p_rgid = gid;
pc->p_svgid = gid;
}
p->p_flag |= P_SUGID;
return (0);
}
/*
* OSF/1 defines _POSIX_SAVED_IDS, which means that our normal
* setuid() won't work.
*
* Instead, by P1003.1b-1993, setuid() is supposed to work like:
* If the process has appropriate [super-user] privileges, the
* setuid() function sets the real user ID, effective user
* ID, and the saved set-user-ID to uid.
* If the process does not have appropriate privileges, but uid
* is equal to the real user ID or the saved set-user-ID, the
* setuid() function sets the effective user ID to uid; the
* real user ID and saved set-user-ID remain unchanged by
* this function call.
*/
int
osf1_sys_setuid(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
struct osf1_sys_setuid_args *uap = v;
struct pcred *pc = p->p_cred;
uid_t uid = SCARG(uap, uid);
int error;
if ((error = suser(pc->pc_ucred, &p->p_acflag)) != 0 &&
uid != pc->p_ruid && uid != pc->p_svuid)
return (error);
pc->pc_ucred = crcopy(pc->pc_ucred);
pc->pc_ucred->cr_uid = uid;
if (error == 0) {
(void)chgproccnt(pc->p_ruid, -1);
(void)chgproccnt(uid, 1);
pc->p_ruid = uid;
pc->p_svuid = uid;
}
p->p_flag |= P_SUGID;
return (0);
}