| /* |
| * CDDL HEADER START |
| * |
| * The contents of this file are subject to the terms of the |
| * Common Development and Distribution License (the "License"). |
| * You may not use this file except in compliance with the License. |
| * |
| * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
| * or http://www.opensolaris.org/os/licensing. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * |
| * When distributing Covered Code, include this CDDL HEADER in each |
| * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
| * If applicable, add the following below this CDDL HEADER, with the |
| * fields enclosed by brackets "[]" replaced with your own identifying |
| * information: Portions Copyright [yyyy] [name of copyright owner] |
| * |
| * CDDL HEADER END |
| */ |
| /* |
| * Copyright 2007 Sun Microsystems, Inc. All rights reserved. |
| * Use is subject to license terms. |
| */ |
| |
| /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ |
| /* All Rights Reserved */ |
| |
| /* |
| * University Copyright- Copyright (c) 1982, 1986, 1988 |
| * The Regents of the University of California |
| * All Rights Reserved |
| * |
| * University Acknowledgment- Portions of this document are derived from |
| * software developed by the University of California, Berkeley, and its |
| * contributors. |
| */ |
| |
| |
| #include <sys/types.h> |
| #include <sys/pathname.h> |
| #include <sys/kmem.h> |
| #include <sys/sysmacros.h> |
| |
| /* |
| * Pathname utilities. |
| * |
| * In translating file names we copy each argument file |
| * name into a pathname structure where we operate on it. |
| * Each pathname structure can hold "pn_bufsize" characters |
| * including a terminating null, and operations here support |
| * allocating and freeing pathname structures, fetching |
| * strings from user space, getting the next character from |
| * a pathname, combining two pathnames (used in symbolic |
| * link processing), and peeling off the first component |
| * of a pathname. |
| */ |
| |
| /* |
| * Allocate contents of pathname structure. Structure is typically |
| * an automatic variable in calling routine for convenience. |
| * |
| * May sleep in the call to kmem_alloc() and so must not be called |
| * from interrupt level. |
| */ |
| void |
| pn_alloc(struct pathname *pnp) |
| { |
| pn_alloc_sz(pnp, MAXPATHLEN); |
| } |
| void |
| pn_alloc_sz(struct pathname *pnp, size_t sz) |
| { |
| pnp->pn_buf = kmem_alloc(sz, KM_SLEEP); |
| pnp->pn_bufsize = sz; |
| #if 0 /* unused in ZoL */ |
| pnp->pn_path = pnp->pn_buf; |
| pnp->pn_pathlen = 0; |
| #endif |
| } |
| |
| /* |
| * Free pathname resources. |
| */ |
| void |
| pn_free(struct pathname *pnp) |
| { |
| /* pn_bufsize is usually MAXPATHLEN, but may not be */ |
| kmem_free(pnp->pn_buf, pnp->pn_bufsize); |
| pnp->pn_buf = NULL; |
| pnp->pn_bufsize = 0; |
| #if 0 /* unused in ZoL */ |
| pnp->pn_path = NULL; |
| pnp->pn_pathlen = 0; |
| #endif |
| } |