contrib/tcsh-6/sh.dir.h

   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 */