Avery Pennarun | 6f6a8f1 | 2013-10-25 17:24:18 -0400 | [diff] [blame] | 1 | #!/bin/sh |
| 2 | # Get modification time of a file or directory and pretty-print it. |
| 3 | |
| 4 | scriptversion=2009-04-28.21; # UTC |
| 5 | |
| 6 | # Copyright (C) 1995, 1996, 1997, 2003, 2004, 2005, 2007, 2009 Free |
| 7 | # Software Foundation, Inc. |
| 8 | # written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, June 1995 |
| 9 | # |
| 10 | # This program is free software; you can redistribute it and/or modify |
| 11 | # it under the terms of the GNU General Public License as published by |
| 12 | # the Free Software Foundation; either version 2, or (at your option) |
| 13 | # any later version. |
| 14 | # |
| 15 | # This program is distributed in the hope that it will be useful, |
| 16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | # GNU General Public License for more details. |
| 19 | # |
| 20 | # You should have received a copy of the GNU General Public License |
| 21 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 22 | |
| 23 | # As a special exception to the GNU General Public License, if you |
| 24 | # distribute this file as part of a program that contains a |
| 25 | # configuration script generated by Autoconf, you may include it under |
| 26 | # the same distribution terms that you use for the rest of that program. |
| 27 | |
| 28 | # This file is maintained in Automake, please report |
| 29 | # bugs to <bug-automake@gnu.org> or send patches to |
| 30 | # <automake-patches@gnu.org>. |
| 31 | |
| 32 | case $1 in |
| 33 | '') |
| 34 | echo "$0: No file. Try \`$0 --help' for more information." 1>&2 |
| 35 | exit 1; |
| 36 | ;; |
| 37 | -h | --h*) |
| 38 | cat <<\EOF |
| 39 | Usage: mdate-sh [--help] [--version] FILE |
| 40 | |
| 41 | Pretty-print the modification time of FILE. |
| 42 | |
| 43 | Report bugs to <bug-automake@gnu.org>. |
| 44 | EOF |
| 45 | exit $? |
| 46 | ;; |
| 47 | -v | --v*) |
| 48 | echo "mdate-sh $scriptversion" |
| 49 | exit $? |
| 50 | ;; |
| 51 | esac |
| 52 | |
| 53 | # Prevent date giving response in another language. |
| 54 | LANG=C |
| 55 | export LANG |
| 56 | LC_ALL=C |
| 57 | export LC_ALL |
| 58 | LC_TIME=C |
| 59 | export LC_TIME |
| 60 | |
| 61 | # GNU ls changes its time format in response to the TIME_STYLE |
| 62 | # variable. Since we cannot assume `unset' works, revert this |
| 63 | # variable to its documented default. |
| 64 | if test "${TIME_STYLE+set}" = set; then |
| 65 | TIME_STYLE=posix-long-iso |
| 66 | export TIME_STYLE |
| 67 | fi |
| 68 | |
| 69 | save_arg1=$1 |
| 70 | |
| 71 | # Find out how to get the extended ls output of a file or directory. |
| 72 | if ls -L /dev/null 1>/dev/null 2>&1; then |
| 73 | ls_command='ls -L -l -d' |
| 74 | else |
| 75 | ls_command='ls -l -d' |
| 76 | fi |
| 77 | # Avoid user/group names that might have spaces, when possible. |
| 78 | if ls -n /dev/null 1>/dev/null 2>&1; then |
| 79 | ls_command="$ls_command -n" |
| 80 | fi |
| 81 | |
| 82 | # A `ls -l' line looks as follows on OS/2. |
| 83 | # drwxrwx--- 0 Aug 11 2001 foo |
| 84 | # This differs from Unix, which adds ownership information. |
| 85 | # drwxrwx--- 2 root root 4096 Aug 11 2001 foo |
| 86 | # |
| 87 | # To find the date, we split the line on spaces and iterate on words |
| 88 | # until we find a month. This cannot work with files whose owner is a |
| 89 | # user named `Jan', or `Feb', etc. However, it's unlikely that `/' |
| 90 | # will be owned by a user whose name is a month. So we first look at |
| 91 | # the extended ls output of the root directory to decide how many |
| 92 | # words should be skipped to get the date. |
| 93 | |
| 94 | # On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below. |
| 95 | set x`$ls_command /` |
| 96 | |
| 97 | # Find which argument is the month. |
| 98 | month= |
| 99 | command= |
| 100 | until test $month |
| 101 | do |
| 102 | shift |
| 103 | # Add another shift to the command. |
| 104 | command="$command shift;" |
| 105 | case $1 in |
| 106 | Jan) month=January; nummonth=1;; |
| 107 | Feb) month=February; nummonth=2;; |
| 108 | Mar) month=March; nummonth=3;; |
| 109 | Apr) month=April; nummonth=4;; |
| 110 | May) month=May; nummonth=5;; |
| 111 | Jun) month=June; nummonth=6;; |
| 112 | Jul) month=July; nummonth=7;; |
| 113 | Aug) month=August; nummonth=8;; |
| 114 | Sep) month=September; nummonth=9;; |
| 115 | Oct) month=October; nummonth=10;; |
| 116 | Nov) month=November; nummonth=11;; |
| 117 | Dec) month=December; nummonth=12;; |
| 118 | esac |
| 119 | done |
| 120 | |
| 121 | # Get the extended ls output of the file or directory. |
| 122 | set dummy x`eval "$ls_command \"\$save_arg1\""` |
| 123 | |
| 124 | # Remove all preceding arguments |
| 125 | eval $command |
| 126 | |
| 127 | # Because of the dummy argument above, month is in $2. |
| 128 | # |
| 129 | # On a POSIX system, we should have |
| 130 | # |
| 131 | # $# = 5 |
| 132 | # $1 = file size |
| 133 | # $2 = month |
| 134 | # $3 = day |
| 135 | # $4 = year or time |
| 136 | # $5 = filename |
| 137 | # |
| 138 | # On Darwin 7.7.0 and 7.6.0, we have |
| 139 | # |
| 140 | # $# = 4 |
| 141 | # $1 = day |
| 142 | # $2 = month |
| 143 | # $3 = year or time |
| 144 | # $4 = filename |
| 145 | |
| 146 | # Get the month. |
| 147 | case $2 in |
| 148 | Jan) month=January; nummonth=1;; |
| 149 | Feb) month=February; nummonth=2;; |
| 150 | Mar) month=March; nummonth=3;; |
| 151 | Apr) month=April; nummonth=4;; |
| 152 | May) month=May; nummonth=5;; |
| 153 | Jun) month=June; nummonth=6;; |
| 154 | Jul) month=July; nummonth=7;; |
| 155 | Aug) month=August; nummonth=8;; |
| 156 | Sep) month=September; nummonth=9;; |
| 157 | Oct) month=October; nummonth=10;; |
| 158 | Nov) month=November; nummonth=11;; |
| 159 | Dec) month=December; nummonth=12;; |
| 160 | esac |
| 161 | |
| 162 | case $3 in |
| 163 | ???*) day=$1;; |
| 164 | *) day=$3; shift;; |
| 165 | esac |
| 166 | |
| 167 | # Here we have to deal with the problem that the ls output gives either |
| 168 | # the time of day or the year. |
| 169 | case $3 in |
| 170 | *:*) set `date`; eval year=\$$# |
| 171 | case $2 in |
| 172 | Jan) nummonthtod=1;; |
| 173 | Feb) nummonthtod=2;; |
| 174 | Mar) nummonthtod=3;; |
| 175 | Apr) nummonthtod=4;; |
| 176 | May) nummonthtod=5;; |
| 177 | Jun) nummonthtod=6;; |
| 178 | Jul) nummonthtod=7;; |
| 179 | Aug) nummonthtod=8;; |
| 180 | Sep) nummonthtod=9;; |
| 181 | Oct) nummonthtod=10;; |
| 182 | Nov) nummonthtod=11;; |
| 183 | Dec) nummonthtod=12;; |
| 184 | esac |
| 185 | # For the first six month of the year the time notation can also |
| 186 | # be used for files modified in the last year. |
| 187 | if (expr $nummonth \> $nummonthtod) > /dev/null; |
| 188 | then |
| 189 | year=`expr $year - 1` |
| 190 | fi;; |
| 191 | *) year=$3;; |
| 192 | esac |
| 193 | |
| 194 | # The result. |
| 195 | echo $day $month $year |
| 196 | |
| 197 | # Local Variables: |
| 198 | # mode: shell-script |
| 199 | # sh-indentation: 2 |
| 200 | # eval: (add-hook 'write-file-hooks 'time-stamp) |
| 201 | # time-stamp-start: "scriptversion=" |
| 202 | # time-stamp-format: "%:y-%02m-%02d.%02H" |
| 203 | # time-stamp-time-zone: "UTC" |
| 204 | # time-stamp-end: "; # UTC" |
| 205 | # End: |