1 #!/bin/sh 2 # Get modification time of a file or directory and pretty-print it. 3 4 scriptversion=2010-08-21.06; # UTC 5 6 # Copyright (C) 1995-2013 Free Software Foundation, Inc. 7 # written by Ulrich Drepper <drepper (at] gnu.ai.mit.edu>, June 1995 8 # 9 # This program is free software; you can redistribute it and/or modify 10 # it under the terms of the GNU General Public License as published by 11 # the Free Software Foundation; either version 2, or (at your option) 12 # any later version. 13 # 14 # This program is distributed in the hope that it will be useful, 15 # but WITHOUT ANY WARRANTY; without even the implied warranty of 16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 # GNU General Public License for more details. 18 # 19 # You should have received a copy of the GNU General Public License 20 # along with this program. If not, see <http://www.gnu.org/licenses/>. 21 22 # As a special exception to the GNU General Public License, if you 23 # distribute this file as part of a program that contains a 24 # configuration script generated by Autoconf, you may include it under 25 # the same distribution terms that you use for the rest of that program. 26 27 # This file is maintained in Automake, please report 28 # bugs to <bug-automake (at] gnu.org> or send patches to 29 # <automake-patches (at] gnu.org>. 30 31 if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then 32 emulate sh 33 NULLCMD=: 34 # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which 35 # is contrary to our usage. Disable this feature. 36 alias -g '${1+"$@"}'='"$@"' 37 setopt NO_GLOB_SUBST 38 fi 39 40 case $1 in 41 '') 42 echo "$0: No file. Try '$0 --help' for more information." 1>&2 43 exit 1; 44 ;; 45 -h | --h*) 46 cat <<\EOF 47 Usage: mdate-sh [--help] [--version] FILE 48 49 Pretty-print the modification day of FILE, in the format: 50 1 January 1970 51 52 Report bugs to <bug-automake@gnu.org>. 53 EOF 54 exit $? 55 ;; 56 -v | --v*) 57 echo "mdate-sh $scriptversion" 58 exit $? 59 ;; 60 esac 61 62 error () 63 { 64 echo "$0: $1" >&2 65 exit 1 66 } 67 68 69 # Prevent date giving response in another language. 70 LANG=C 71 export LANG 72 LC_ALL=C 73 export LC_ALL 74 LC_TIME=C 75 export LC_TIME 76 77 # GNU ls changes its time format in response to the TIME_STYLE 78 # variable. Since we cannot assume 'unset' works, revert this 79 # variable to its documented default. 80 if test "${TIME_STYLE+set}" = set; then 81 TIME_STYLE=posix-long-iso 82 export TIME_STYLE 83 fi 84 85 save_arg1=$1 86 87 # Find out how to get the extended ls output of a file or directory. 88 if ls -L /dev/null 1>/dev/null 2>&1; then 89 ls_command='ls -L -l -d' 90 else 91 ls_command='ls -l -d' 92 fi 93 # Avoid user/group names that might have spaces, when possible. 94 if ls -n /dev/null 1>/dev/null 2>&1; then 95 ls_command="$ls_command -n" 96 fi 97 98 # A 'ls -l' line looks as follows on OS/2. 99 # drwxrwx--- 0 Aug 11 2001 foo 100 # This differs from Unix, which adds ownership information. 101 # drwxrwx--- 2 root root 4096 Aug 11 2001 foo 102 # 103 # To find the date, we split the line on spaces and iterate on words 104 # until we find a month. This cannot work with files whose owner is a 105 # user named "Jan", or "Feb", etc. However, it's unlikely that '/' 106 # will be owned by a user whose name is a month. So we first look at 107 # the extended ls output of the root directory to decide how many 108 # words should be skipped to get the date. 109 110 # On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below. 111 set x`$ls_command /` 112 113 # Find which argument is the month. 114 month= 115 command= 116 until test $month 117 do 118 test $# -gt 0 || error "failed parsing '$ls_command /' output" 119 shift 120 # Add another shift to the command. 121 command="$command shift;" 122 case $1 in 123 Jan) month=January; nummonth=1;; 124 Feb) month=February; nummonth=2;; 125 Mar) month=March; nummonth=3;; 126 Apr) month=April; nummonth=4;; 127 May) month=May; nummonth=5;; 128 Jun) month=June; nummonth=6;; 129 Jul) month=July; nummonth=7;; 130 Aug) month=August; nummonth=8;; 131 Sep) month=September; nummonth=9;; 132 Oct) month=October; nummonth=10;; 133 Nov) month=November; nummonth=11;; 134 Dec) month=December; nummonth=12;; 135 esac 136 done 137 138 test -n "$month" || error "failed parsing '$ls_command /' output" 139 140 # Get the extended ls output of the file or directory. 141 set dummy x`eval "$ls_command \"\\\$save_arg1\""` 142 143 # Remove all preceding arguments 144 eval $command 145 146 # Because of the dummy argument above, month is in $2. 147 # 148 # On a POSIX system, we should have 149 # 150 # $# = 5 151 # $1 = file size 152 # $2 = month 153 # $3 = day 154 # $4 = year or time 155 # $5 = filename 156 # 157 # On Darwin 7.7.0 and 7.6.0, we have 158 # 159 # $# = 4 160 # $1 = day 161 # $2 = month 162 # $3 = year or time 163 # $4 = filename 164 165 # Get the month. 166 case $2 in 167 Jan) month=January; nummonth=1;; 168 Feb) month=February; nummonth=2;; 169 Mar) month=March; nummonth=3;; 170 Apr) month=April; nummonth=4;; 171 May) month=May; nummonth=5;; 172 Jun) month=June; nummonth=6;; 173 Jul) month=July; nummonth=7;; 174 Aug) month=August; nummonth=8;; 175 Sep) month=September; nummonth=9;; 176 Oct) month=October; nummonth=10;; 177 Nov) month=November; nummonth=11;; 178 Dec) month=December; nummonth=12;; 179 esac 180 181 case $3 in 182 ???*) day=$1;; 183 *) day=$3; shift;; 184 esac 185 186 # Here we have to deal with the problem that the ls output gives either 187 # the time of day or the year. 188 case $3 in 189 *:*) set `date`; eval year=\$$# 190 case $2 in 191 Jan) nummonthtod=1;; 192 Feb) nummonthtod=2;; 193 Mar) nummonthtod=3;; 194 Apr) nummonthtod=4;; 195 May) nummonthtod=5;; 196 Jun) nummonthtod=6;; 197 Jul) nummonthtod=7;; 198 Aug) nummonthtod=8;; 199 Sep) nummonthtod=9;; 200 Oct) nummonthtod=10;; 201 Nov) nummonthtod=11;; 202 Dec) nummonthtod=12;; 203 esac 204 # For the first six month of the year the time notation can also 205 # be used for files modified in the last year. 206 if (expr $nummonth \> $nummonthtod) > /dev/null; 207 then 208 year=`expr $year - 1` 209 fi;; 210 *) year=$3;; 211 esac 212 213 # The result. 214 echo $day $month $year 215 216 # Local Variables: 217 # mode: shell-script 218 # sh-indentation: 2 219 # eval: (add-hook 'write-file-hooks 'time-stamp) 220 # time-stamp-start: "scriptversion=" 221 # time-stamp-format: "%:y-%02m-%02d.%02H" 222 # time-stamp-time-zone: "UTC" 223 # time-stamp-end: "; # UTC" 224 # End: 225
