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 */ 37 struct 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 }; 43 EXTERN struct directory *dcwd IZERO_STRUCT; /* the one we are in now */ 44 EXTERN 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