FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/sys/pathname.h

     /*
      * 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 https://opensource.org/licenses/CDDL-1.0.
     * 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 (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved.
     */
    
    /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
    /*        All Rights Reserved   */
    
    /*
     * Portions of this source code were derived from Berkeley 4.3 BSD
     * under license from the Regents of the University of California.
     */
    
    #ifndef _SYS_PATHNAME_H
    #define _SYS_PATHNAME_H
    
    #ifdef  __cplusplus
    extern "C" {
    #endif
    
    /*
     * Pathname structure.
     * System calls that operate on path names gather the path name
     * from the system call into this structure and reduce it by
     * peeling off translated components.  If a symbolic link is
     * encountered the new path name to be translated is also
     * assembled in this structure.
     *
     * By convention pn_buf is not changed once it's been set to point
     * to the underlying storage; routines which manipulate the pathname
     * do so by changing pn_path and pn_pathlen.  pn_pathlen is redundant
     * since the path name is null-terminated, but is provided to make
     * some computations faster.
     */
    typedef struct pathname {
            char    *pn_buf;                /* underlying storage */
            size_t  pn_bufsize;             /* total size of pn_buf */
    } pathname_t;
    
    extern void     pn_alloc(struct pathname *);
    extern void     pn_alloc_sz(struct pathname *, size_t);
    extern void     pn_free(struct pathname *);
    
    #ifdef  __cplusplus
    }
    #endif
    
    #endif  /* _SYS_PATHNAME_H */

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