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+/*
+ * Copyright (c) 1989, 1993
+ * The Regents of the University of California. 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 the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
+ *
+ * @(#)ucred.h 8.4 (Berkeley) 1/9/95
+ * $Id$
+ */
+
+#ifndef _SYS_UCRED_H_
+#define _SYS_UCRED_H_
+
+/*
+ * Credentials.
+ */
+struct ucred {
+ u_short cr_ref; /* reference count */
+ uid_t cr_uid; /* effective user id */
+ short cr_ngroups; /* number of groups */
+ gid_t cr_groups[NGROUPS]; /* groups */
+};
+#define cr_gid cr_groups[0]
+#define NOCRED ((struct ucred *)0) /* no credential available */
+#define FSCRED ((struct ucred *)-1) /* filesystem credential */
+
+#ifdef KERNEL
+#define crhold(cr) (cr)->cr_ref++
+
+struct ucred *crcopy __P((struct ucred *cr));
+struct ucred *crdup __P((struct ucred *cr));
+void crfree __P((struct ucred *cr));
+struct ucred *crget __P((void));
+int suser __P((struct ucred *cred, u_short *acflag));
+int groupmember __P((gid_t gid, struct ucred *cred));
+#endif /* KERNEL */
+
+#endif /* !_SYS_UCRED_H_ */