1#!/bin/sh 2# Get modification time of a file or directory and pretty-print it. 3 4scriptversion=2010-08-21.06; # UTC 5 6# Copyright (C) 1995, 1996, 1997, 2003, 2004, 2005, 2007, 2009, 2010 7# Free 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 32if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then 33 emulate sh 34 NULLCMD=: 35 # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which 36 # is contrary to our usage. Disable this feature. 37 alias -g '${1+"$@"}'='"$@"' 38 setopt NO_GLOB_SUBST 39fi 40 41case $1 in 42 '') 43 echo "$0: No file. Try \`$0 --help' for more information." 1>&2 44 exit 1; 45 ;; 46 -h | --h*) 47 cat <<\EOF 48Usage: mdate-sh [--help] [--version] FILE 49 50Pretty-print the modification day of FILE, in the format: 511 January 1970 52 53Report bugs to <bug-automake@gnu.org>. 54EOF 55 exit $? 56 ;; 57 -v | --v*) 58 echo "mdate-sh $scriptversion" 59 exit $? 60 ;; 61esac 62 63error () 64{ 65 echo "$0: $1" >&2 66 exit 1 67} 68 69 70# Prevent date giving response in another language. 71LANG=C 72export LANG 73LC_ALL=C 74export LC_ALL 75LC_TIME=C 76export LC_TIME 77 78# GNU ls changes its time format in response to the TIME_STYLE 79# variable. Since we cannot assume `unset' works, revert this 80# variable to its documented default. 81if test "${TIME_STYLE+set}" = set; then 82 TIME_STYLE=posix-long-iso 83 export TIME_STYLE 84fi 85 86save_arg1=$1 87 88# Find out how to get the extended ls output of a file or directory. 89if ls -L /dev/null 1>/dev/null 2>&1; then 90 ls_command='ls -L -l -d' 91else 92 ls_command='ls -l -d' 93fi 94# Avoid user/group names that might have spaces, when possible. 95if ls -n /dev/null 1>/dev/null 2>&1; then 96 ls_command="$ls_command -n" 97fi 98 99# A `ls -l' line looks as follows on OS/2. 100# drwxrwx--- 0 Aug 11 2001 foo 101# This differs from Unix, which adds ownership information. 102# drwxrwx--- 2 root root 4096 Aug 11 2001 foo 103# 104# To find the date, we split the line on spaces and iterate on words 105# until we find a month. This cannot work with files whose owner is a 106# user named `Jan', or `Feb', etc. However, it's unlikely that `/' 107# will be owned by a user whose name is a month. So we first look at 108# the extended ls output of the root directory to decide how many 109# words should be skipped to get the date. 110 111# On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below. 112set x`$ls_command /` 113 114# Find which argument is the month. 115month= 116command= 117until test $month 118do 119 test $# -gt 0 || error "failed parsing \`$ls_command /' output" 120 shift 121 # Add another shift to the command. 122 command="$command shift;" 123 case $1 in 124 Jan) month=January; nummonth=1;; 125 Feb) month=February; nummonth=2;; 126 Mar) month=March; nummonth=3;; 127 Apr) month=April; nummonth=4;; 128 May) month=May; nummonth=5;; 129 Jun) month=June; nummonth=6;; 130 Jul) month=July; nummonth=7;; 131 Aug) month=August; nummonth=8;; 132 Sep) month=September; nummonth=9;; 133 Oct) month=October; nummonth=10;; 134 Nov) month=November; nummonth=11;; 135 Dec) month=December; nummonth=12;; 136 esac 137done 138 139test -n "$month" || error "failed parsing \`$ls_command /' output" 140 141# Get the extended ls output of the file or directory. 142set dummy x`eval "$ls_command \"\\\$save_arg1\""` 143 144# Remove all preceding arguments 145eval $command 146 147# Because of the dummy argument above, month is in $2. 148# 149# On a POSIX system, we should have 150# 151# $# = 5 152# $1 = file size 153# $2 = month 154# $3 = day 155# $4 = year or time 156# $5 = filename 157# 158# On Darwin 7.7.0 and 7.6.0, we have 159# 160# $# = 4 161# $1 = day 162# $2 = month 163# $3 = year or time 164# $4 = filename 165 166# Get the month. 167case $2 in 168 Jan) month=January; nummonth=1;; 169 Feb) month=February; nummonth=2;; 170 Mar) month=March; nummonth=3;; 171 Apr) month=April; nummonth=4;; 172 May) month=May; nummonth=5;; 173 Jun) month=June; nummonth=6;; 174 Jul) month=July; nummonth=7;; 175 Aug) month=August; nummonth=8;; 176 Sep) month=September; nummonth=9;; 177 Oct) month=October; nummonth=10;; 178 Nov) month=November; nummonth=11;; 179 Dec) month=December; nummonth=12;; 180esac 181 182case $3 in 183 ???*) day=$1;; 184 *) day=$3; shift;; 185esac 186 187# Here we have to deal with the problem that the ls output gives either 188# the time of day or the year. 189case $3 in 190 *:*) set `date`; eval year=\$$# 191 case $2 in 192 Jan) nummonthtod=1;; 193 Feb) nummonthtod=2;; 194 Mar) nummonthtod=3;; 195 Apr) nummonthtod=4;; 196 May) nummonthtod=5;; 197 Jun) nummonthtod=6;; 198 Jul) nummonthtod=7;; 199 Aug) nummonthtod=8;; 200 Sep) nummonthtod=9;; 201 Oct) nummonthtod=10;; 202 Nov) nummonthtod=11;; 203 Dec) nummonthtod=12;; 204 esac 205 # For the first six month of the year the time notation can also 206 # be used for files modified in the last year. 207 if (expr $nummonth \> $nummonthtod) > /dev/null; 208 then 209 year=`expr $year - 1` 210 fi;; 211 *) year=$3;; 212esac 213 214# The result. 215echo $day $month $year 216 217# Local Variables: 218# mode: shell-script 219# sh-indentation: 2 220# eval: (add-hook 'write-file-hooks 'time-stamp) 221# time-stamp-start: "scriptversion=" 222# time-stamp-format: "%:y-%02m-%02d.%02H" 223# time-stamp-time-zone: "UTC" 224# time-stamp-end: "; # UTC" 225# End: 226