1#!/bin/sh
2# Get modification time of a file or directory and pretty-print it.
3
4scriptversion=2005-02-07.09
5
6# Copyright (C) 1995, 1996, 1997, 2003, 2004, 2005 Free Software
7# 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, write to the Free Software Foundation,
22# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23
24# As a special exception to the GNU General Public License, if you
25# distribute this file as part of a program that contains a
26# configuration script generated by Autoconf, you may include it under
27# the same distribution terms that you use for the rest of that program.
28
29# This file is maintained in Automake, please report
30# bugs to <bug-automake@gnu.org> or send patches to
31# <automake-patches@gnu.org>.
32
33case $1 in
34  '')
35     echo "$0: No file.  Try \`$0 --help' for more information." 1>&2
36     exit 1;
37     ;;
38  -h | --h*)
39    cat <<\EOF
40Usage: mdate-sh [--help] [--version] FILE
41
42Pretty-print the modification time of FILE.
43
44Report bugs to <bug-automake@gnu.org>.
45EOF
46    exit $?
47    ;;
48  -v | --v*)
49    echo "mdate-sh $scriptversion"
50    exit $?
51    ;;
52esac
53
54# Prevent date giving response in another language.
55LANG=C
56export LANG
57LC_ALL=C
58export LC_ALL
59LC_TIME=C
60export LC_TIME
61
62save_arg1="$1"
63
64# Find out how to get the extended ls output of a file or directory.
65if ls -L /dev/null 1>/dev/null 2>&1; then
66  ls_command='ls -L -l -d'
67else
68  ls_command='ls -l -d'
69fi
70
71# A `ls -l' line looks as follows on OS/2.
72#  drwxrwx---        0 Aug 11  2001 foo
73# This differs from Unix, which adds ownership information.
74#  drwxrwx---   2 root  root      4096 Aug 11  2001 foo
75#
76# To find the date, we split the line on spaces and iterate on words
77# until we find a month.  This cannot work with files whose owner is a
78# user named `Jan', or `Feb', etc.  However, it's unlikely that `/'
79# will be owned by a user whose name is a month.  So we first look at
80# the extended ls output of the root directory to decide how many
81# words should be skipped to get the date.
82
83# On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below.
84set x`ls -l -d /`
85
86# Find which argument is the month.
87month=
88command=
89until test $month
90do
91  shift
92  # Add another shift to the command.
93  command="$command shift;"
94  case $1 in
95    Jan) month=January; nummonth=1;;
96    Feb) month=February; nummonth=2;;
97    Mar) month=March; nummonth=3;;
98    Apr) month=April; nummonth=4;;
99    May) month=May; nummonth=5;;
100    Jun) month=June; nummonth=6;;
101    Jul) month=July; nummonth=7;;
102    Aug) month=August; nummonth=8;;
103    Sep) month=September; nummonth=9;;
104    Oct) month=October; nummonth=10;;
105    Nov) month=November; nummonth=11;;
106    Dec) month=December; nummonth=12;;
107  esac
108done
109
110# Get the extended ls output of the file or directory.
111set dummy x`eval "$ls_command \"\$save_arg1\""`
112
113# Remove all preceding arguments
114eval $command
115
116# Because of the dummy argument above, month is in $2.
117#
118# On a POSIX system, we should have
119#
120# $# = 5
121# $1 = file size
122# $2 = month
123# $3 = day
124# $4 = year or time
125# $5 = filename
126#
127# On Darwin 7.7.0 and 7.6.0, we have
128#
129# $# = 4
130# $1 = day
131# $2 = month
132# $3 = year or time
133# $4 = filename
134
135# Get the month.
136case $2 in
137  Jan) month=January; nummonth=1;;
138  Feb) month=February; nummonth=2;;
139  Mar) month=March; nummonth=3;;
140  Apr) month=April; nummonth=4;;
141  May) month=May; nummonth=5;;
142  Jun) month=June; nummonth=6;;
143  Jul) month=July; nummonth=7;;
144  Aug) month=August; nummonth=8;;
145  Sep) month=September; nummonth=9;;
146  Oct) month=October; nummonth=10;;
147  Nov) month=November; nummonth=11;;
148  Dec) month=December; nummonth=12;;
149esac
150
151case $3 in
152  ???*) day=$1;;
153  *) day=$3; shift;;
154esac
155
156# Here we have to deal with the problem that the ls output gives either
157# the time of day or the year.
158case $3 in
159  *:*) set `date`; eval year=\$$#
160       case $2 in
161	 Jan) nummonthtod=1;;
162	 Feb) nummonthtod=2;;
163	 Mar) nummonthtod=3;;
164	 Apr) nummonthtod=4;;
165	 May) nummonthtod=5;;
166	 Jun) nummonthtod=6;;
167	 Jul) nummonthtod=7;;
168	 Aug) nummonthtod=8;;
169	 Sep) nummonthtod=9;;
170	 Oct) nummonthtod=10;;
171	 Nov) nummonthtod=11;;
172	 Dec) nummonthtod=12;;
173       esac
174       # For the first six month of the year the time notation can also
175       # be used for files modified in the last year.
176       if (expr $nummonth \> $nummonthtod) > /dev/null;
177       then
178	 year=`expr $year - 1`
179       fi;;
180  *) year=$3;;
181esac
182
183# The result.
184echo $day $month $year
185
186# Local Variables:
187# mode: shell-script
188# sh-indentation: 2
189# eval: (add-hook 'write-file-hooks 'time-stamp)
190# time-stamp-start: "scriptversion="
191# time-stamp-format: "%:y-%02m-%02d.%02H"
192# time-stamp-end: "$"
193# End:
194