git.zerfleddert.de Git - micropolis/blob - src/tclx/tclsrc/pushd.tcl

   1 #
   2 # pushd.tcl --
   3 #
   4 # C-shell style directory stack procs.
   5 #
   6 #------------------------------------------------------------------------------
   7 # Copyright 1992 Karl Lehenbauer and Mark Diekhans.
   8 #
   9 # Permission to use, copy, modify, and distribute this software and its
  10 # documentation for any purpose and without fee is hereby granted, provided
  11 # that the above copyright notice appear in all copies.  Karl Lehenbauer and
  12 # Mark Diekhans make no representations about the suitability of this
  13 # software for any purpose.  It is provided "as is" without express or
  14 # implied warranty.
  15 #------------------------------------------------------------------------------
  16 # $Id: pushd.tcl,v 2.0 1992/10/16 04:52:06 markd Rel $
  17 #------------------------------------------------------------------------------
  18 #
  19
  20 #@package: TclX-directory_stack pushd popd dirs
  21
  22 global TCLENV(dirPushList)
  23
  24 set TCLENV(dirPushList) ""
  25
  26 proc pushd {args} {
  27     global TCLENV
  28
  29     if {[llength $args] > 1} {
  30         error "bad # args: pushd [dir_to_cd_to]"
  31     }
  32     set TCLENV(dirPushList) [linsert $TCLENV(dirPushList) 0 [pwd]]
  33
  34     if {[llength $args] != 0} {
  35         cd [glob $args]
  36     }
  37 }
  38
  39 proc popd {} {
  40     global TCLENV
  41
  42     if [llength $TCLENV(dirPushList)] {
  43         cd [lvarpop TCLENV(dirPushList)]
  44         pwd
  45     } else {
  46         error "directory stack empty"
  47     }
  48 }
  49
  50 proc dirs {} {
  51     global TCLENV
  52     echo [pwd] $TCLENV(dirPushList)
  53 }