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Editing: mdate-sh
#!/bin/sh # Get modification time of a file or directory and pretty-print it. scriptversion=2018-03-07.03; # UTC # Copyright (C) 1995-2018 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 <https://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: $1" >&2 exit 1 } # Prevent date giving response in another language. LANG=C export LANG LC_ALL=C export LC_ALL LC_TIME=C export LC_TIME # Use UTC to get reproducible result. TZ=UTC0 export TZ # GNU ls changes its time format in response to the TIME_STYLE # variable. Since we cannot assume 'unset' works, revert this # variable to its documented default. if test "${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 'before-save-hook 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-time-zone: "UTC0" # time-stamp-end: "; # UTC" # End:
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