Annotation of sys/kern/sysv_ipc.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: sysv_ipc.c,v 1.5 2005/12/13 10:33:14 jsg Exp $ */
! 2: /* $NetBSD: sysv_ipc.c,v 1.10 1995/06/03 05:53:28 mycroft Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1995 Charles M. Hannum. 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 Charles M. Hannum.
! 18: * 4. The name of the author may not be used to endorse or promote products
! 19: * derived from this software without specific prior written permission.
! 20: *
! 21: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 22: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 23: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 24: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 25: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 26: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 27: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 28: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 29: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 30: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 31: */
! 32:
! 33: #include <sys/param.h>
! 34: #include <sys/kernel.h>
! 35: #include <sys/proc.h>
! 36: #include <sys/ipc.h>
! 37: #include <sys/systm.h>
! 38: #include <sys/mount.h>
! 39: #include <sys/vnode.h>
! 40:
! 41: /*
! 42: * Check for ipc permission
! 43: */
! 44:
! 45: int
! 46: ipcperm(struct ucred *cred, struct ipc_perm *perm, int mode)
! 47: {
! 48:
! 49: if (mode == IPC_M) {
! 50: if (cred->cr_uid == 0 ||
! 51: cred->cr_uid == perm->uid ||
! 52: cred->cr_uid == perm->cuid)
! 53: return (0);
! 54: return (EPERM);
! 55: }
! 56:
! 57: if (vaccess(perm->mode, perm->uid, perm->gid, mode, cred) == 0 ||
! 58: vaccess(perm->mode, perm->cuid, perm->cgid, mode, cred) == 0)
! 59: return (0);
! 60: return (EACCES);
! 61: }
CVSweb