[06e1086] | 1 | #!/bin/sh |
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| 2 | # Get modification time of a file or directory and pretty-print it. |
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| 3 | |
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| 4 | scriptversion=2010-08-21.06; # UTC |
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| 5 | |
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[d65de8a1] | 6 | # Copyright (C) 1995-2013 Free Software Foundation, Inc. |
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[06e1086] | 7 | # written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, June 1995 |
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| 8 | # |
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| 9 | # This program is free software; you can redistribute it and/or modify |
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| 10 | # it under the terms of the GNU General Public License as published by |
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| 11 | # the Free Software Foundation; either version 2, or (at your option) |
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| 12 | # any later version. |
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| 13 | # |
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| 14 | # This program is distributed in the hope that it will be useful, |
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| 15 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | # GNU General Public License for more details. |
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| 18 | # |
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| 19 | # You should have received a copy of the GNU General Public License |
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| 20 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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| 21 | |
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| 22 | # As a special exception to the GNU General Public License, if you |
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| 23 | # distribute this file as part of a program that contains a |
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| 24 | # configuration script generated by Autoconf, you may include it under |
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| 25 | # the same distribution terms that you use for the rest of that program. |
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| 26 | |
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| 27 | # This file is maintained in Automake, please report |
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| 28 | # bugs to <bug-automake@gnu.org> or send patches to |
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| 29 | # <automake-patches@gnu.org>. |
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| 30 | |
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| 31 | if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then |
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| 32 | emulate sh |
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| 33 | NULLCMD=: |
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| 34 | # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which |
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| 35 | # is contrary to our usage. Disable this feature. |
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| 36 | alias -g '${1+"$@"}'='"$@"' |
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| 37 | setopt NO_GLOB_SUBST |
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| 38 | fi |
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| 39 | |
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| 40 | case $1 in |
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| 41 | '') |
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| 42 | echo "$0: No file. Try '$0 --help' for more information." 1>&2 |
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| 43 | exit 1; |
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| 44 | ;; |
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| 45 | -h | --h*) |
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| 46 | cat <<\EOF |
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| 47 | Usage: mdate-sh [--help] [--version] FILE |
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| 48 | |
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| 49 | Pretty-print the modification day of FILE, in the format: |
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| 50 | 1 January 1970 |
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| 51 | |
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| 52 | Report bugs to <bug-automake@gnu.org>. |
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| 53 | EOF |
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| 54 | exit $? |
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| 55 | ;; |
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| 56 | -v | --v*) |
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| 57 | echo "mdate-sh $scriptversion" |
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| 58 | exit $? |
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| 59 | ;; |
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| 60 | esac |
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| 61 | |
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| 62 | error () |
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| 63 | { |
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| 64 | echo "$0: $1" >&2 |
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| 65 | exit 1 |
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| 66 | } |
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| 67 | |
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| 68 | |
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| 69 | # Prevent date giving response in another language. |
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| 70 | LANG=C |
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| 71 | export LANG |
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| 72 | LC_ALL=C |
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| 73 | export LC_ALL |
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| 74 | LC_TIME=C |
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| 75 | export LC_TIME |
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| 76 | |
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| 77 | # GNU ls changes its time format in response to the TIME_STYLE |
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| 78 | # variable. Since we cannot assume 'unset' works, revert this |
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| 79 | # variable to its documented default. |
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| 80 | if test "${TIME_STYLE+set}" = set; then |
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| 81 | TIME_STYLE=posix-long-iso |
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| 82 | export TIME_STYLE |
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| 83 | fi |
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| 84 | |
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| 85 | save_arg1=$1 |
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| 86 | |
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| 87 | # Find out how to get the extended ls output of a file or directory. |
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| 88 | if ls -L /dev/null 1>/dev/null 2>&1; then |
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| 89 | ls_command='ls -L -l -d' |
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| 90 | else |
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| 91 | ls_command='ls -l -d' |
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| 92 | fi |
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| 93 | # Avoid user/group names that might have spaces, when possible. |
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| 94 | if ls -n /dev/null 1>/dev/null 2>&1; then |
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| 95 | ls_command="$ls_command -n" |
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| 96 | fi |
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| 97 | |
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| 98 | # A 'ls -l' line looks as follows on OS/2. |
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| 99 | # drwxrwx--- 0 Aug 11 2001 foo |
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| 100 | # This differs from Unix, which adds ownership information. |
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| 101 | # drwxrwx--- 2 root root 4096 Aug 11 2001 foo |
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| 102 | # |
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| 103 | # To find the date, we split the line on spaces and iterate on words |
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| 104 | # until we find a month. This cannot work with files whose owner is a |
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| 105 | # user named "Jan", or "Feb", etc. However, it's unlikely that '/' |
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| 106 | # will be owned by a user whose name is a month. So we first look at |
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| 107 | # the extended ls output of the root directory to decide how many |
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| 108 | # words should be skipped to get the date. |
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| 109 | |
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| 110 | # On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below. |
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| 111 | set x`$ls_command /` |
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| 112 | |
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| 113 | # Find which argument is the month. |
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| 114 | month= |
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| 115 | command= |
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| 116 | until test $month |
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| 117 | do |
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| 118 | test $# -gt 0 || error "failed parsing '$ls_command /' output" |
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| 119 | shift |
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| 120 | # Add another shift to the command. |
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| 121 | command="$command shift;" |
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| 122 | case $1 in |
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| 123 | Jan) month=January; nummonth=1;; |
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| 124 | Feb) month=February; nummonth=2;; |
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| 125 | Mar) month=March; nummonth=3;; |
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| 126 | Apr) month=April; nummonth=4;; |
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| 127 | May) month=May; nummonth=5;; |
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| 128 | Jun) month=June; nummonth=6;; |
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| 129 | Jul) month=July; nummonth=7;; |
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| 130 | Aug) month=August; nummonth=8;; |
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| 131 | Sep) month=September; nummonth=9;; |
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| 132 | Oct) month=October; nummonth=10;; |
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| 133 | Nov) month=November; nummonth=11;; |
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| 134 | Dec) month=December; nummonth=12;; |
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| 135 | esac |
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| 136 | done |
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| 137 | |
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| 138 | test -n "$month" || error "failed parsing '$ls_command /' output" |
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| 139 | |
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| 140 | # Get the extended ls output of the file or directory. |
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| 141 | set dummy x`eval "$ls_command \"\\\$save_arg1\""` |
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| 142 | |
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| 143 | # Remove all preceding arguments |
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| 144 | eval $command |
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| 145 | |
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| 146 | # Because of the dummy argument above, month is in $2. |
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| 147 | # |
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| 148 | # On a POSIX system, we should have |
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| 149 | # |
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| 150 | # $# = 5 |
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| 151 | # $1 = file size |
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| 152 | # $2 = month |
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| 153 | # $3 = day |
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| 154 | # $4 = year or time |
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| 155 | # $5 = filename |
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| 156 | # |
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| 157 | # On Darwin 7.7.0 and 7.6.0, we have |
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| 158 | # |
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| 159 | # $# = 4 |
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| 160 | # $1 = day |
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| 161 | # $2 = month |
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| 162 | # $3 = year or time |
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| 163 | # $4 = filename |
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| 164 | |
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| 165 | # Get the month. |
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| 166 | case $2 in |
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| 167 | Jan) month=January; nummonth=1;; |
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| 168 | Feb) month=February; nummonth=2;; |
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| 169 | Mar) month=March; nummonth=3;; |
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| 170 | Apr) month=April; nummonth=4;; |
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| 171 | May) month=May; nummonth=5;; |
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| 172 | Jun) month=June; nummonth=6;; |
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| 173 | Jul) month=July; nummonth=7;; |
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| 174 | Aug) month=August; nummonth=8;; |
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| 175 | Sep) month=September; nummonth=9;; |
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| 176 | Oct) month=October; nummonth=10;; |
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| 177 | Nov) month=November; nummonth=11;; |
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| 178 | Dec) month=December; nummonth=12;; |
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| 179 | esac |
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| 180 | |
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| 181 | case $3 in |
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| 182 | ???*) day=$1;; |
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| 183 | *) day=$3; shift;; |
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| 184 | esac |
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| 185 | |
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| 186 | # Here we have to deal with the problem that the ls output gives either |
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| 187 | # the time of day or the year. |
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| 188 | case $3 in |
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| 189 | *:*) set `date`; eval year=\$$# |
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| 190 | case $2 in |
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| 191 | Jan) nummonthtod=1;; |
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| 192 | Feb) nummonthtod=2;; |
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| 193 | Mar) nummonthtod=3;; |
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| 194 | Apr) nummonthtod=4;; |
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| 195 | May) nummonthtod=5;; |
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| 196 | Jun) nummonthtod=6;; |
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| 197 | Jul) nummonthtod=7;; |
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| 198 | Aug) nummonthtod=8;; |
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| 199 | Sep) nummonthtod=9;; |
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| 200 | Oct) nummonthtod=10;; |
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| 201 | Nov) nummonthtod=11;; |
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| 202 | Dec) nummonthtod=12;; |
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| 203 | esac |
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| 204 | # For the first six month of the year the time notation can also |
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| 205 | # be used for files modified in the last year. |
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| 206 | if (expr $nummonth \> $nummonthtod) > /dev/null; |
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| 207 | then |
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| 208 | year=`expr $year - 1` |
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| 209 | fi;; |
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| 210 | *) year=$3;; |
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| 211 | esac |
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| 212 | |
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| 213 | # The result. |
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| 214 | echo $day $month $year |
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| 215 | |
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| 216 | # Local Variables: |
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| 217 | # mode: shell-script |
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| 218 | # sh-indentation: 2 |
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| 219 | # eval: (add-hook 'write-file-hooks 'time-stamp) |
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| 220 | # time-stamp-start: "scriptversion=" |
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| 221 | # time-stamp-format: "%:y-%02m-%02d.%02H" |
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| 222 | # time-stamp-time-zone: "UTC" |
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| 223 | # time-stamp-end: "; # UTC" |
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| 224 | # End: |
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