mdate-sh revision 1.1.1.1
1#!/bin/sh 2# Get modification time of a file or directory and pretty-print it. 3 4scriptversion=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 32case $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 39Usage: mdate-sh [--help] [--version] FILE 40 41Pretty-print the modification time of FILE. 42 43Report bugs to <bug-automake@gnu.org>. 44EOF 45 exit $? 46 ;; 47 -v | --v*) 48 echo "mdate-sh $scriptversion" 49 exit $? 50 ;; 51esac 52 53# Prevent date giving response in another language. 54LANG=C 55export LANG 56LC_ALL=C 57export LC_ALL 58LC_TIME=C 59export LC_TIME 60 61# GNU ls changes its time format in response to the TIME_STYLE 62# variable. Since we cannot assume `unset' works, revert this 63# variable to its documented default. 64if test "${TIME_STYLE+set}" = set; then 65 TIME_STYLE=posix-long-iso 66 export TIME_STYLE 67fi 68 69save_arg1=$1 70 71# Find out how to get the extended ls output of a file or directory. 72if ls -L /dev/null 1>/dev/null 2>&1; then 73 ls_command='ls -L -l -d' 74else 75 ls_command='ls -l -d' 76fi 77# Avoid user/group names that might have spaces, when possible. 78if ls -n /dev/null 1>/dev/null 2>&1; then 79 ls_command="$ls_command -n" 80fi 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. 95set x`$ls_command /` 96 97# Find which argument is the month. 98month= 99command= 100until test $month 101do 102 shift 103 # Add another shift to the command. 104 command="$command shift;" 105 case $1 in 106 Jan) month=January; nummonth=1;; 107 Feb) month=February; nummonth=2;; 108 Mar) month=March; nummonth=3;; 109 Apr) month=April; nummonth=4;; 110 May) month=May; nummonth=5;; 111 Jun) month=June; nummonth=6;; 112 Jul) month=July; nummonth=7;; 113 Aug) month=August; nummonth=8;; 114 Sep) month=September; nummonth=9;; 115 Oct) month=October; nummonth=10;; 116 Nov) month=November; nummonth=11;; 117 Dec) month=December; nummonth=12;; 118 esac 119done 120 121# Get the extended ls output of the file or directory. 122set dummy x`eval "$ls_command \"\$save_arg1\""` 123 124# Remove all preceding arguments 125eval $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. 147case $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;; 160esac 161 162case $3 in 163 ???*) day=$1;; 164 *) day=$3; shift;; 165esac 166 167# Here we have to deal with the problem that the ls output gives either 168# the time of day or the year. 169case $3 in 170 *:*) set `date`; eval year=\$$# 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;; 192esac 193 194# The result. 195echo $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: 206