Annotation of sys/compat/osf1/osf1_prot.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: osf1_prot.c,v 1.3 2007/03/15 10:22:30 art Exp $ */
! 2: /* $NetBSD: osf1_prot.c,v 1.2 1999/05/05 01:51:35 cgd Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1999 Christopher G. Demetriou. All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by Christopher G. Demetriou
! 18: * for the NetBSD Project.
! 19: * 4. The name of the author may not be used to endorse or promote products
! 20: * derived from this software without specific prior written permission
! 21: *
! 22: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 25: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 26: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 27: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 28: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 29: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 30: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 31: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 32: */
! 33:
! 34: /*
! 35: * Copyright (c) 1994, 1995 Carnegie-Mellon University.
! 36: * All rights reserved.
! 37: *
! 38: * Author: Chris G. Demetriou
! 39: *
! 40: * Permission to use, copy, modify and distribute this software and
! 41: * its documentation is hereby granted, provided that both the copyright
! 42: * notice and this permission notice appear in all copies of the
! 43: * software, derivative works or modified versions, and any portions
! 44: * thereof, and that both notices appear in supporting documentation.
! 45: *
! 46: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
! 47: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
! 48: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
! 49: *
! 50: * Carnegie Mellon requests users of this software to return to
! 51: *
! 52: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
! 53: * School of Computer Science
! 54: * Carnegie Mellon University
! 55: * Pittsburgh PA 15213-3890
! 56: *
! 57: * any improvements or extensions that they make and grant Carnegie the
! 58: * rights to redistribute these changes.
! 59: */
! 60:
! 61: #include <sys/param.h>
! 62: #include <sys/systm.h>
! 63: #include <sys/proc.h>
! 64: #include <sys/mount.h>
! 65: #include <sys/syscallargs.h>
! 66:
! 67: #include <compat/osf1/osf1.h>
! 68: #include <compat/osf1/osf1_syscallargs.h>
! 69: #include <compat/osf1/osf1_cvt.h>
! 70:
! 71: /*
! 72: * OSF/1 defines _POSIX_SAVED_IDS, which means that our normal
! 73: * setgid() won't work.
! 74: *
! 75: * If you change "uid" to "gid" in the discussion, below, about
! 76: * setuid(), you'll get a correct description of setgid().
! 77: */
! 78: int
! 79: osf1_sys_setgid(p, v, retval)
! 80: struct proc *p;
! 81: void *v;
! 82: register_t *retval;
! 83: {
! 84: struct osf1_sys_setgid_args *uap = v;
! 85: struct pcred *pc = p->p_cred;
! 86: gid_t gid = SCARG(uap, gid);
! 87: int error;
! 88:
! 89: if ((error = suser(p, 0)) != 0 &&
! 90: gid != pc->p_rgid && gid != pc->p_svgid)
! 91: return (error);
! 92:
! 93: pc->pc_ucred = crcopy(pc->pc_ucred);
! 94: pc->pc_ucred->cr_gid = gid;
! 95: if (error == 0) {
! 96: pc->p_rgid = gid;
! 97: pc->p_svgid = gid;
! 98: }
! 99: atomic_setbits_int(&p->p_flag, P_SUGID);
! 100: return (0);
! 101: }
! 102:
! 103: /*
! 104: * OSF/1 defines _POSIX_SAVED_IDS, which means that our normal
! 105: * setuid() won't work.
! 106: *
! 107: * Instead, by P1003.1b-1993, setuid() is supposed to work like:
! 108: * If the process has appropriate [super-user] privileges, the
! 109: * setuid() function sets the real user ID, effective user
! 110: * ID, and the saved set-user-ID to uid.
! 111: * If the process does not have appropriate privileges, but uid
! 112: * is equal to the real user ID or the saved set-user-ID, the
! 113: * setuid() function sets the effective user ID to uid; the
! 114: * real user ID and saved set-user-ID remain unchanged by
! 115: * this function call.
! 116: */
! 117: int
! 118: osf1_sys_setuid(p, v, retval)
! 119: struct proc *p;
! 120: void *v;
! 121: register_t *retval;
! 122: {
! 123: struct osf1_sys_setuid_args *uap = v;
! 124: struct pcred *pc = p->p_cred;
! 125: uid_t uid = SCARG(uap, uid);
! 126: int error;
! 127:
! 128: if ((error = suser(p, 0)) != 0 &&
! 129: uid != pc->p_ruid && uid != pc->p_svuid)
! 130: return (error);
! 131:
! 132: pc->pc_ucred = crcopy(pc->pc_ucred);
! 133: pc->pc_ucred->cr_uid = uid;
! 134: if (error == 0) {
! 135: (void)chgproccnt(pc->p_ruid, -1);
! 136: (void)chgproccnt(uid, 1);
! 137: pc->p_ruid = uid;
! 138: pc->p_svuid = uid;
! 139: }
! 140: atomic_setbits_int(&p->p_flag, P_SUGID);
! 141: return (0);
! 142: }
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