initial import of NetBSD tree

1 files changed, 63 insertions, 0 deletions

diff --git a/sys/kern/sysv_ipc.c b/sys/kern/sysv_ipc.c
new file mode 100644
index 00000000000..2761a9670c6
--- /dev/null
+++ b/sys/kern/sysv_ipc.c
@@ -0,0 +1,63 @@
+/*	$NetBSD: sysv_ipc.c,v 1.10 1995/06/03 05:53:28 mycroft Exp $	*/
+
+/*
+ * Copyright (c) 1995 Charles M. Hannum.  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 Charles M. Hannum.
+ * 4. The name of the author 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>
+#include <sys/mount.h>
+#include <sys/vnode.h>
+
+/*
+ * Check for ipc permission
+ */
+
+int
+ipcperm(cred, perm, mode)
+	struct ucred *cred;
+	struct ipc_perm *perm;
+	int mode;
+{
+
+	if (mode == IPC_M) {
+		if (cred->cr_uid == 0 ||
+		    cred->cr_uid == perm->uid ||
+		    cred->cr_uid == perm->cuid)
+			return (0);
+		return (EPERM);
+	}
+
+	if (vaccess(perm->mode, perm->uid, perm->gid, mode, cred) == 0 ||
+	    vaccess(perm->mode, perm->cuid, perm->cgid, mode, cred) == 0)
+		return (0);
+	return (EACCES);
+}