xnu-1504.9.17.tar.gz

[apple/xnu.git] / bsd / kern / sysv_ipc.c

diff --git a/bsd/kern/sysv_ipc.c b/bsd/kern/sysv_ipc.c
index 789d379da4e39a15b58c526e7b66e263f6dc5cb3..95c23d418efb580d09459b9b0e3d319b5e31eac3 100644 (file)
--- a/bsd/kern/sysv_ipc.c
+++ b/bsd/kern/sysv_ipc.c
@@ -1,14 +1,19 @@
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
  * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
@@ -18,7 +23,7 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*     $NetBSD: sysv_ipc.c,v 1.7 1994/06/29 06:33:11 cgd Exp $ */
 
@@ -66,6 +71,11 @@
  * XXX: proc->p_acflag to suser()
  */
 
+/*
+ * Returns:    0                       Success
+ *             EPERM
+ *             EACCES
+ */
 int
 ipcperm(kauth_cred_t cred, struct ipc_perm *perm, int mode)
 {
@@ -82,12 +92,14 @@ ipcperm(kauth_cred_t cred, struct ipc_perm *perm, int mode)
                /* Check for group match. */
                mode >>= 3;
                if ((kauth_cred_ismember_gid(cred, perm->gid, &is_member) || !is_member) &&
-                   (kauth_cred_ismember_gid(cred, perm->cgid, &is_member) || !is_member))
+                   (kauth_cred_ismember_gid(cred, perm->cgid, &is_member) || !is_member)) {
                        /* Check for `other' match. */
                        mode >>= 3;
        }
+       }
 
        if (mode & IPC_M)
                return (0);
+
        return ((mode & perm->mode) == mode ? 0 : EACCES);
 }