| #!/bin/sh |
| # Get modification time of a file or directory and pretty-print it. |
| |
| scriptversion=2010-08-21.06; # UTC |
| |
| # Copyright (C) 1995-2013 Free Software Foundation, Inc. |
| # written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, June 1995 |
| # |
| # This program is free software; you can redistribute it and/or modify |
| # it under the terms of the GNU General Public License as published by |
| # the Free Software Foundation; either version 2, or (at your option) |
| # any later version. |
| # |
| # This program is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| |
| # As a special exception to the GNU General Public License, if you |
| # distribute this file as part of a program that contains a |
| # configuration script generated by Autoconf, you may include it under |
| # the same distribution terms that you use for the rest of that program. |
| |
| # This file is maintained in Automake, please report |
| # bugs to <bug-automake@gnu.org> or send patches to |
| # <automake-patches@gnu.org>. |
| |
| if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then |
| emulate sh |
| NULLCMD=: |
| # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which |
| # is contrary to our usage. Disable this feature. |
| alias -g '${1+"$@"}'='"$@"' |
| setopt NO_GLOB_SUBST |
| fi |
| |
| case $1 in |
| '') |
| echo "$0: No file. Try '$0 --help' for more information." 1>&2 |
| exit 1; |
| ;; |
| -h | --h*) |
| cat <<\EOF |
| Usage: mdate-sh [--help] [--version] FILE |
| |
| Pretty-print the modification day of FILE, in the format: |
| 1 January 1970 |
| |
| Report bugs to <bug-automake@gnu.org>. |
| EOF |
| exit $? |
| ;; |
| -v | --v*) |
| echo "mdate-sh $scriptversion" |
| exit $? |
| ;; |
| esac |
| |
| error () |
| { |
| echo "$0: $1" >&2 |
| exit 1 |
| } |
| |
| |
| # Prevent date giving response in another language. |
| LANG=C |
| export LANG |
| LC_ALL=C |
| export LC_ALL |
| LC_TIME=C |
| export LC_TIME |
| |
| # GNU ls changes its time format in response to the TIME_STYLE |
| # variable. Since we cannot assume 'unset' works, revert this |
| # variable to its documented default. |
| if test "${TIME_STYLE+set}" = set; then |
| TIME_STYLE=posix-long-iso |
| export TIME_STYLE |
| fi |
| |
| save_arg1=$1 |
| |
| # Find out how to get the extended ls output of a file or directory. |
| if ls -L /dev/null 1>/dev/null 2>&1; then |
| ls_command='ls -L -l -d' |
| else |
| ls_command='ls -l -d' |
| fi |
| # Avoid user/group names that might have spaces, when possible. |
| if ls -n /dev/null 1>/dev/null 2>&1; then |
| ls_command="$ls_command -n" |
| fi |
| |
| # A 'ls -l' line looks as follows on OS/2. |
| # drwxrwx--- 0 Aug 11 2001 foo |
| # This differs from Unix, which adds ownership information. |
| # drwxrwx--- 2 root root 4096 Aug 11 2001 foo |
| # |
| # To find the date, we split the line on spaces and iterate on words |
| # until we find a month. This cannot work with files whose owner is a |
| # user named "Jan", or "Feb", etc. However, it's unlikely that '/' |
| # will be owned by a user whose name is a month. So we first look at |
| # the extended ls output of the root directory to decide how many |
| # words should be skipped to get the date. |
| |
| # On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below. |
| set x`$ls_command /` |
| |
| # Find which argument is the month. |
| month= |
| command= |
| until test $month |
| do |
| test $# -gt 0 || error "failed parsing '$ls_command /' output" |
| shift |
| # Add another shift to the command. |
| command="$command shift;" |
| case $1 in |
| Jan) month=January; nummonth=1;; |
| Feb) month=February; nummonth=2;; |
| Mar) month=March; nummonth=3;; |
| Apr) month=April; nummonth=4;; |
| May) month=May; nummonth=5;; |
| Jun) month=June; nummonth=6;; |
| Jul) month=July; nummonth=7;; |
| Aug) month=August; nummonth=8;; |
| Sep) month=September; nummonth=9;; |
| Oct) month=October; nummonth=10;; |
| Nov) month=November; nummonth=11;; |
| Dec) month=December; nummonth=12;; |
| esac |
| done |
| |
| test -n "$month" || error "failed parsing '$ls_command /' output" |
| |
| # Get the extended ls output of the file or directory. |
| set dummy x`eval "$ls_command \"\\\$save_arg1\""` |
| |
| # Remove all preceding arguments |
| eval $command |
| |
| # Because of the dummy argument above, month is in $2. |
| # |
| # On a POSIX system, we should have |
| # |
| # $# = 5 |
| # $1 = file size |
| # $2 = month |
| # $3 = day |
| # $4 = year or time |
| # $5 = filename |
| # |
| # On Darwin 7.7.0 and 7.6.0, we have |
| # |
| # $# = 4 |
| # $1 = day |
| # $2 = month |
| # $3 = year or time |
| # $4 = filename |
| |
| # Get the month. |
| case $2 in |
| Jan) month=January; nummonth=1;; |
| Feb) month=February; nummonth=2;; |
| Mar) month=March; nummonth=3;; |
| Apr) month=April; nummonth=4;; |
| May) month=May; nummonth=5;; |
| Jun) month=June; nummonth=6;; |
| Jul) month=July; nummonth=7;; |
| Aug) month=August; nummonth=8;; |
| Sep) month=September; nummonth=9;; |
| Oct) month=October; nummonth=10;; |
| Nov) month=November; nummonth=11;; |
| Dec) month=December; nummonth=12;; |
| esac |
| |
| case $3 in |
| ???*) day=$1;; |
| *) day=$3; shift;; |
| esac |
| |
| # Here we have to deal with the problem that the ls output gives either |
| # the time of day or the year. |
| case $3 in |
| *:*) set `date`; eval year=\$$# |
| case $2 in |
| Jan) nummonthtod=1;; |
| Feb) nummonthtod=2;; |
| Mar) nummonthtod=3;; |
| Apr) nummonthtod=4;; |
| May) nummonthtod=5;; |
| Jun) nummonthtod=6;; |
| Jul) nummonthtod=7;; |
| Aug) nummonthtod=8;; |
| Sep) nummonthtod=9;; |
| Oct) nummonthtod=10;; |
| Nov) nummonthtod=11;; |
| Dec) nummonthtod=12;; |
| esac |
| # For the first six month of the year the time notation can also |
| # be used for files modified in the last year. |
| if (expr $nummonth \> $nummonthtod) > /dev/null; |
| then |
| year=`expr $year - 1` |
| fi;; |
| *) year=$3;; |
| esac |
| |
| # The result. |
| echo $day $month $year |
| |
| # Local Variables: |
| # mode: shell-script |
| # sh-indentation: 2 |
| # eval: (add-hook 'write-file-hooks 'time-stamp) |
| # time-stamp-start: "scriptversion=" |
| # time-stamp-format: "%:y-%02m-%02d.%02H" |
| # time-stamp-time-zone: "UTC" |
| # time-stamp-end: "; # UTC" |
| # End: |