sh.dir.h revision 302408 
1/* $Header: /p/tcsh/cvsroot/tcsh/sh.dir.h,v 3.6 2002/03/08 17:36:46 christos Exp $ */
2/*
3 * sh.dir.h: Directory data structures and globals
4 */
5/*-
6 * Copyright (c) 1980, 1991 The Regents of the University of California.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33#ifndef _h_sh_dir
34#define _h_sh_dir
35/*
36 * Structure for entries in directory stack.
37 */
38struct directory {
39    struct directory *di_next;	/* next in loop */
40    struct directory *di_prev;	/* prev in loop */
41    unsigned short *di_count;	/* refcount of processes */
42    Char   *di_name;		/* actual name */
43};
44EXTERN struct directory *dcwd IZERO_STRUCT;	/* the one we are in now */
45EXTERN int symlinks;
46
47#define SYM_CHASE	1
48#define SYM_IGNORE	2
49#define SYM_EXPAND	3
50
51#define TRM(a) ((a) & TRIM)
52#define NTRM(a) (a)
53#define ISDOT(c) (NTRM((c)[0]) == '.' && ((NTRM((c)[1]) == '\0') || \
54		  (NTRM((c)[1]) == '/')))
55#define ISDOTDOT(c) (NTRM((c)[0]) == '.' && ISDOT(&((c)[1])))
56
57#endif				/* _h_sh_dir */
58