sh.dir.h revision 59243 
1/* $Header: /src/pub/tcsh/sh.dir.h,v 3.5 1997/10/27 22:44:26 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. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by the University of
20 *	California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37#ifndef _h_sh_dir
38#define _h_sh_dir
39/*
40 * Structure for entries in directory stack.
41 */
42struct directory {
43    struct directory *di_next;	/* next in loop */
44    struct directory *di_prev;	/* prev in loop */
45    unsigned short *di_count;	/* refcount of processes */
46    Char   *di_name;		/* actual name */
47};
48EXTERN struct directory *dcwd IZERO_STRUCT;	/* the one we are in now */
49EXTERN int symlinks;
50
51#define SYM_CHASE	1
52#define SYM_IGNORE	2
53#define SYM_EXPAND	3
54
55#define TRM(a) ((a) & TRIM)
56#define NTRM(a) (a)
57#define ISDOT(c) (NTRM((c)[0]) == '.' && ((NTRM((c)[1]) == '\0') || \
58		  (NTRM((c)[1]) == '/')))
59#define ISDOTDOT(c) (NTRM((c)[0]) == '.' && ISDOT(&((c)[1])))
60
61#endif				/* _h_sh_dir */
62