diff options
author | dfr <dfr@FreeBSD.org> | 1994-09-13 14:47:38 +0000 |
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committer | dfr <dfr@FreeBSD.org> | 1994-09-13 14:47:38 +0000 |
commit | 580fe46632ff236a0f268c29705d04d44ad2f89a (patch) | |
tree | 0b43a166c9d31a9a5c55d5efd7085507563a3825 /sys/kern/sysv_ipc.c | |
parent | a7c9d6c8b52a067267445732a70349e616440364 (diff) | |
download | FreeBSD-src-580fe46632ff236a0f268c29705d04d44ad2f89a.zip FreeBSD-src-580fe46632ff236a0f268c29705d04d44ad2f89a.tar.gz |
Added SYSV ipcs.
Obtained from: NetBSD and FreeBSD-1.1.5
Diffstat (limited to 'sys/kern/sysv_ipc.c')
-rw-r--r-- | sys/kern/sysv_ipc.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/sys/kern/sysv_ipc.c b/sys/kern/sysv_ipc.c new file mode 100644 index 0000000..f0e907b --- /dev/null +++ b/sys/kern/sysv_ipc.c @@ -0,0 +1,69 @@ +/* $Id$ */ +/* $NetBSD: sysv_ipc.c,v 1.7 1994/06/29 06:33:11 cgd Exp $ */ + +/* + * Copyright (c) 1994 Herb Peyerl <hpeyerl@novatel.ca> + * 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 Herb Peyerl. + * 4. The name of Herb Peyerl 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. + */ + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/proc.h> +#include <sys/ipc.h> +#include <sys/systm.h> + +/* + * Check for ipc permission + */ + +int +ipcperm(cred, perm, mode) + struct ucred *cred; + struct ipc_perm *perm; + int mode; +{ + + if (cred->cr_uid == 0) + return (0); + + /* Check for user match. */ + if (cred->cr_uid != perm->cuid && cred->cr_uid != perm->uid) { + if (mode & IPC_M) + return (EPERM); + /* Check for group match. */ + mode >>= 3; + if (!groupmember(perm->gid, cred) && + !groupmember(perm->cgid, cred)) + /* Check for `other' match. */ + mode >>= 3; + } + + if (mode & IPC_M) + return (0); + return ((mode & perm->mode) == mode ? 0 : EACCES); +} |