mdate-sh
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上传日期:2022-08-06
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文件大小:5k
- #!/bin/sh
- # Get modification time of a file or directory and pretty-print it.
- scriptversion=2003-11-09.00
- # Copyright (C) 1995, 1996, 1997, 2003 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, write to the Free Software Foundation,
- # Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- # 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>.
- 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 time of FILE.
- Report bugs to <bug-automake@gnu.org>.
- EOF
- exit 0
- ;;
- -v | --v*)
- echo "mdate-sh $scriptversion"
- exit 0
- ;;
- esac
- # Prevent date giving response in another language.
- LANG=C
- export LANG
- LC_ALL=C
- export LC_ALL
- LC_TIME=C
- export LC_TIME
- # GNU ls changes its time format in response to the TIME_STYLE variable, but
- # we cannot unset it since the V7 shell did not have an "unset" command.
- # The documentation says that the default is "posix-long-iso".
- #
- test "${TIME_STYLE+set}" = set && TIME_STYLE=posix-long-iso
- save_arg1="$1"
- # Find out how to get the extended ls output of a file or directory.
- if ls -L /dev/null 1>/dev/null 2>&1; then
- ls_command='ls -L -l -d'
- else
- ls_command='ls -l -d'
- fi
- # A `ls -l' line looks as follows on OS/2.
- # drwxrwx--- 0 Aug 11 2001 foo
- # This differs from Unix, which adds ownership information.
- # drwxrwx--- 2 root root 4096 Aug 11 2001 foo
- #
- # To find the date, we split the line on spaces and iterate on words
- # until we find a month. This cannot work with files whose owner is a
- # user named `Jan', or `Feb', etc. However, it's unlikely that `/'
- # will be owned by a user whose name is a month. So we first look at
- # the extended ls output of the root directory to decide how many
- # words should be skipped to get the date.
- # On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below.
- set - x`$ls_command /`
- # Find which argument is the month.
- month=
- command=
- until test $month
- do
- shift
- # Add another shift to the command.
- command="$command shift;"
- case $1 in
- Jan) month=January; nummonth=1;;
- Feb) month=February; nummonth=2;;
- Mar) month=March; nummonth=3;;
- Apr) month=April; nummonth=4;;
- May) month=May; nummonth=5;;
- Jun) month=June; nummonth=6;;
- Jul) month=July; nummonth=7;;
- Aug) month=August; nummonth=8;;
- Sep) month=September; nummonth=9;;
- Oct) month=October; nummonth=10;;
- Nov) month=November; nummonth=11;;
- Dec) month=December; nummonth=12;;
- esac
- done
- # Get the extended ls output of the file or directory.
- set - x`eval "$ls_command "$save_arg1""`
- # Remove all preceding arguments
- eval $command
- # Get the month. Next argument is day, followed by the year or time.
- 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
- day=$2
- # 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 $year
- # Local Variables:
- # mode: shell-script
- # sh-indentation: 2
- # eval: (add-hook 'write-file-hooks 'time-stamp)
- # time-stamp-start: "scriptversion="
- # time-stamp-format: "%:y-%02m-%02d.%02H"
- # time-stamp-end: "$"
- # End: