142 lines
4.8 KiB
C
142 lines
4.8 KiB
C
/* $NetBSD: osf1_prot.c,v 1.3 1999/08/16 02:59:24 simonb Exp $ */
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/*
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* Copyright (c) 1999 Christopher G. Demetriou. All rights reserved.
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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 Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1994, 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/mount.h>
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#include <sys/syscallargs.h>
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#include <compat/osf1/osf1.h>
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#include <compat/osf1/osf1_syscallargs.h>
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#include <compat/osf1/osf1_cvt.h>
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/*
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* OSF/1 defines _POSIX_SAVED_IDS, which means that our normal
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* setgid() won't work.
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*
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* If you change "uid" to "gid" in the discussion, below, about
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* setuid(), you'll get a correct description of setgid().
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*/
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int
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osf1_sys_setgid(p, v, retval)
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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 osf1_sys_setgid_args *uap = v;
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struct pcred *pc = p->p_cred;
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gid_t gid = SCARG(uap, gid);
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int error;
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if ((error = suser(pc->pc_ucred, &p->p_acflag)) != 0 &&
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gid != pc->p_rgid && gid != pc->p_svgid)
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return (error);
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pc->pc_ucred = crcopy(pc->pc_ucred);
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pc->pc_ucred->cr_gid = gid;
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if (error == 0) {
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pc->p_rgid = gid;
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pc->p_svgid = gid;
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}
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p->p_flag |= P_SUGID;
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return (0);
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}
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/*
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* OSF/1 defines _POSIX_SAVED_IDS, which means that our normal
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* setuid() won't work.
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*
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* Instead, by P1003.1b-1993, setuid() is supposed to work like:
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* If the process has appropriate [super-user] privileges, the
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* setuid() function sets the real user ID, effective user
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* ID, and the saved set-user-ID to uid.
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* If the process does not have appropriate privileges, but uid
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* is equal to the real user ID or the saved set-user-ID, the
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* setuid() function sets the effective user ID to uid; the
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* real user ID and saved set-user-ID remain unchanged by
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* this function call.
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*/
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int
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osf1_sys_setuid(p, v, retval)
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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 osf1_sys_setuid_args *uap = v;
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struct pcred *pc = p->p_cred;
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uid_t uid = SCARG(uap, uid);
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int error;
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if ((error = suser(pc->pc_ucred, &p->p_acflag)) != 0 &&
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uid != pc->p_ruid && uid != pc->p_svuid)
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return (error);
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pc->pc_ucred = crcopy(pc->pc_ucred);
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pc->pc_ucred->cr_uid = uid;
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if (error == 0) {
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(void)chgproccnt(pc->p_ruid, -1);
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(void)chgproccnt(uid, 1);
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pc->p_ruid = uid;
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pc->p_svuid = uid;
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}
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p->p_flag |= P_SUGID;
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return (0);
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}
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