1#!/bin/sh
2# Get modification time of a file or directory and pretty-print it.
3
4scriptversion=2004-12-08.12
5
6# Copyright (C) 1995, 1996, 1997, 2003, 2004 Free Software Foundation, Inc.
7# written by Ulrich Drepper <drepper@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, write to the Free Software Foundation,
21# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22
23# As a special exception to the GNU General Public License, if you
24# distribute this file as part of a program that contains a
25# configuration script generated by Autoconf, you may include it under
26# the same distribution terms that you use for the rest of that program.
27
28# This file is maintained in Automake, please report
29# bugs to <bug-automake@gnu.org> or send patches to
30# <automake-patches@gnu.org>.
31
32case $1 in
33  '')
34     echo "$0: No file.  Try \`$0 --help' for more information." 1>&2
35     exit 1;
36     ;;
37  -h | --h*)
38    cat <<\EOF
39Usage: mdate-sh [--help] [--version] FILE
40
41Pretty-print the modification time of FILE.
42
43Report bugs to <bug-automake@gnu.org>.
44EOF
45    exit 0
46    ;;
47  -v | --v*)
48    echo "mdate-sh $scriptversion"
49    exit 0
50    ;;
51esac
52
53# Prevent date giving response in another language.
54LANG=C
55export LANG
56LC_ALL=C
57export LC_ALL
58LC_TIME=C
59export LC_TIME
60
61save_arg1="$1"
62
63# Find out how to get the extended ls output of a file or directory.
64if ls -L /dev/null 1>/dev/null 2>&1; then
65  ls_command='ls -L -l -d'
66else
67  ls_command='ls -l -d'
68fi
69
70# A `ls -l' line looks as follows on OS/2.
71#  drwxrwx---        0 Aug 11  2001 foo
72# This differs from Unix, which adds ownership information.
73#  drwxrwx---   2 root  root      4096 Aug 11  2001 foo
74#
75# To find the date, we split the line on spaces and iterate on words
76# until we find a month.  This cannot work with files whose owner is a
77# user named `Jan', or `Feb', etc.  However, it's unlikely that `/'
78# will be owned by a user whose name is a month.  So we first look at
79# the extended ls output of the root directory to decide how many
80# words should be skipped to get the date.
81
82# On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below.
83set x`ls -l -d /`
84
85# Find which argument is the month.
86month=
87command=
88until test $month
89do
90  shift
91  # Add another shift to the command.
92  command="$command shift;"
93  case $1 in
94    Jan) month=January; nummonth=1;;
95    Feb) month=February; nummonth=2;;
96    Mar) month=March; nummonth=3;;
97    Apr) month=April; nummonth=4;;
98    May) month=May; nummonth=5;;
99    Jun) month=June; nummonth=6;;
100    Jul) month=July; nummonth=7;;
101    Aug) month=August; nummonth=8;;
102    Sep) month=September; nummonth=9;;
103    Oct) month=October; nummonth=10;;
104    Nov) month=November; nummonth=11;;
105    Dec) month=December; nummonth=12;;
106  esac
107done
108
109# Get the extended ls output of the file or directory.
110set x`eval "$ls_command \"\$save_arg1\""`
111
112# Remove all preceding arguments
113eval $command
114
115# Get the month.  Next argument is day, followed by the year or time.
116case $1 in
117  Jan) month=January; nummonth=1;;
118  Feb) month=February; nummonth=2;;
119  Mar) month=March; nummonth=3;;
120  Apr) month=April; nummonth=4;;
121  May) month=May; nummonth=5;;
122  Jun) month=June; nummonth=6;;
123  Jul) month=July; nummonth=7;;
124  Aug) month=August; nummonth=8;;
125  Sep) month=September; nummonth=9;;
126  Oct) month=October; nummonth=10;;
127  Nov) month=November; nummonth=11;;
128  Dec) month=December; nummonth=12;;
129esac
130
131day=$2
132
133# Here we have to deal with the problem that the ls output gives either
134# the time of day or the year.
135case $3 in
136  *:*) set `date`; eval year=\$$#
137       case $2 in
138	 Jan) nummonthtod=1;;
139	 Feb) nummonthtod=2;;
140	 Mar) nummonthtod=3;;
141	 Apr) nummonthtod=4;;
142	 May) nummonthtod=5;;
143	 Jun) nummonthtod=6;;
144	 Jul) nummonthtod=7;;
145	 Aug) nummonthtod=8;;
146	 Sep) nummonthtod=9;;
147	 Oct) nummonthtod=10;;
148	 Nov) nummonthtod=11;;
149	 Dec) nummonthtod=12;;
150       esac
151       # For the first six month of the year the time notation can also
152       # be used for files modified in the last year.
153       if (expr $nummonth \> $nummonthtod) > /dev/null;
154       then
155	 year=`expr $year - 1`
156       fi;;
157  *) year=$3;;
158esac
159
160# The result.
161echo $day $month $year
162
163# Local Variables:
164# mode: shell-script
165# sh-indentation: 2
166# eval: (add-hook 'write-file-hooks 'time-stamp)
167# time-stamp-start: "scriptversion="
168# time-stamp-format: "%:y-%02m-%02d.%02H"
169# time-stamp-end: "$"
170# End:
171