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2714 | cejka | 1 | # $NetBSD: pushd,v 1.7 1995/05/11 21:31:15 christos Exp $ |
2 | # Copyright (c) 1991, 1993 |
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3 | # The Regents of the University of California. All rights reserved. |
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4 | # |
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5 | # This code is derived from software contributed to Berkeley by |
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6 | # Kenneth Almquist. |
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7 | # |
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8 | # Redistribution and use in source and binary forms, with or without |
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9 | # modification, are permitted provided that the following conditions |
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10 | # are met: |
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11 | # 1. Redistributions of source code must retain the above copyright |
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12 | # notice, this list of conditions and the following disclaimer. |
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13 | # 2. Redistributions in binary form must reproduce the above copyright |
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14 | # notice, this list of conditions and the following disclaimer in the |
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15 | # documentation and/or other materials provided with the distribution. |
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16 | # 3. All advertising materials mentioning features or use of this software |
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17 | # must display the following acknowledgement: |
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18 | # This product includes software developed by the University of |
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19 | # California, Berkeley and its contributors. |
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20 | # 4. Neither the name of the University nor the names of its contributors |
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21 | # may be used to endorse or promote products derived from this software |
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22 | # without specific prior written permission. |
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23 | # |
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24 | # THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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25 | # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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26 | # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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27 | # ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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28 | # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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29 | # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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30 | # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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31 | # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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32 | # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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33 | # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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34 | # SUCH DAMAGE. |
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35 | # |
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36 | # @(#)pushd 8.2 (Berkeley) 5/4/95 |
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37 | |||
38 | # pushd, popd, and dirs --- written by Chris Bertin |
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39 | # Pixel Computer Inc. ...!wjh12!pixel!pixutl!chris |
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40 | # as modified by Patrick Elam of GTRI and Kenneth Almquist at UW |
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41 | |||
42 | pushd () { |
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43 | SAVE=`pwd` |
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44 | if [ "$1" = "" ] |
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45 | then if [ "$DSTACK" = "" ] |
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46 | then echo "pushd: directory stack empty." |
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47 | return 1 |
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48 | fi |
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49 | set $DSTACK |
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50 | cd $1 || return |
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51 | shift 1 |
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52 | DSTACK="$*" |
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53 | else cd $1 > /dev/null || return |
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54 | fi |
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55 | DSTACK="$SAVE $DSTACK" |
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56 | dirs |
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57 | } |
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58 | |||
59 | popd () { |
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60 | if [ "$DSTACK" = "" ] |
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61 | then echo "popd: directory stack empty." |
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62 | return 1 |
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63 | fi |
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64 | set $DSTACK |
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65 | cd $1 |
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66 | shift |
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67 | DSTACK=$* |
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68 | dirs |
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69 | } |
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70 | |||
71 | dirs () { |
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72 | echo "`pwd` $DSTACK" |
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73 | return 0 |
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74 | } |