sh.dir.h revision 354195 
1/*
2 * sh.dir.h: Directory data structures and globals
3 */
4/*-
5 * Copyright (c) 1980, 1991 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32#ifndef _h_sh_dir
33#define _h_sh_dir
34/*
35 * Structure for entries in directory stack.
36 */
37struct directory {
38    struct directory *di_next;	/* next in loop */
39    struct directory *di_prev;	/* prev in loop */
40    unsigned short *di_count;	/* refcount of processes */
41    Char   *di_name;		/* actual name */
42};
43EXTERN struct directory *dcwd IZERO_STRUCT;	/* the one we are in now */
44EXTERN int symlinks;
45
46#define SYM_CHASE	1
47#define SYM_IGNORE	2
48#define SYM_EXPAND	3
49
50#define TRM(a) ((a) & TRIM)
51#define NTRM(a) (a)
52#define ISDOT(c) (NTRM((c)[0]) == '.' && ((NTRM((c)[1]) == '\0') || \
53		  (NTRM((c)[1]) == '/')))
54#define ISDOTDOT(c) (NTRM((c)[0]) == '.' && ISDOT(&((c)[1])))
55
56#endif				/* _h_sh_dir */
57