contrib/tcsh-6/sh.dir.h

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