source: rtems/mdate-sh @ e0caabe

Last change on this file since e0caabe was d65de8a1, checked in by Ralf Corsépius <ralf.corsepius@…>, on May 27, 2013 at 12:47:20 PM

Update from automake-1.13.2.

  • Property mode set to 100755
File size: 5.9 KB
Line 
1#!/bin/sh
2# Get modification time of a file or directory and pretty-print it.
3
4scriptversion=2010-08-21.06; # UTC
5
6# Copyright (C) 1995-2013 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, see <http://www.gnu.org/licenses/>.
21
22# As a special exception to the GNU General Public License, if you
23# distribute this file as part of a program that contains a
24# configuration script generated by Autoconf, you may include it under
25# the same distribution terms that you use for the rest of that program.
26
27# This file is maintained in Automake, please report
28# bugs to <bug-automake@gnu.org> or send patches to
29# <automake-patches@gnu.org>.
30
31if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
32  emulate sh
33  NULLCMD=:
34  # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which
35  # is contrary to our usage.  Disable this feature.
36  alias -g '${1+"$@"}'='"$@"'
37  setopt NO_GLOB_SUBST
38fi
39
40case $1 in
41  '')
42     echo "$0: No file.  Try '$0 --help' for more information." 1>&2
43     exit 1;
44     ;;
45  -h | --h*)
46    cat <<\EOF
47Usage: mdate-sh [--help] [--version] FILE
48
49Pretty-print the modification day of FILE, in the format:
501 January 1970
51
52Report bugs to <bug-automake@gnu.org>.
53EOF
54    exit $?
55    ;;
56  -v | --v*)
57    echo "mdate-sh $scriptversion"
58    exit $?
59    ;;
60esac
61
62error ()
63{
64  echo "$0: $1" >&2
65  exit 1
66}
67
68
69# Prevent date giving response in another language.
70LANG=C
71export LANG
72LC_ALL=C
73export LC_ALL
74LC_TIME=C
75export LC_TIME
76
77# GNU ls changes its time format in response to the TIME_STYLE
78# variable.  Since we cannot assume 'unset' works, revert this
79# variable to its documented default.
80if test "${TIME_STYLE+set}" = set; then
81  TIME_STYLE=posix-long-iso
82  export TIME_STYLE
83fi
84
85save_arg1=$1
86
87# Find out how to get the extended ls output of a file or directory.
88if ls -L /dev/null 1>/dev/null 2>&1; then
89  ls_command='ls -L -l -d'
90else
91  ls_command='ls -l -d'
92fi
93# Avoid user/group names that might have spaces, when possible.
94if ls -n /dev/null 1>/dev/null 2>&1; then
95  ls_command="$ls_command -n"
96fi
97
98# A 'ls -l' line looks as follows on OS/2.
99#  drwxrwx---        0 Aug 11  2001 foo
100# This differs from Unix, which adds ownership information.
101#  drwxrwx---   2 root  root      4096 Aug 11  2001 foo
102#
103# To find the date, we split the line on spaces and iterate on words
104# until we find a month.  This cannot work with files whose owner is a
105# user named "Jan", or "Feb", etc.  However, it's unlikely that '/'
106# will be owned by a user whose name is a month.  So we first look at
107# the extended ls output of the root directory to decide how many
108# words should be skipped to get the date.
109
110# On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below.
111set x`$ls_command /`
112
113# Find which argument is the month.
114month=
115command=
116until test $month
117do
118  test $# -gt 0 || error "failed parsing '$ls_command /' output"
119  shift
120  # Add another shift to the command.
121  command="$command shift;"
122  case $1 in
123    Jan) month=January; nummonth=1;;
124    Feb) month=February; nummonth=2;;
125    Mar) month=March; nummonth=3;;
126    Apr) month=April; nummonth=4;;
127    May) month=May; nummonth=5;;
128    Jun) month=June; nummonth=6;;
129    Jul) month=July; nummonth=7;;
130    Aug) month=August; nummonth=8;;
131    Sep) month=September; nummonth=9;;
132    Oct) month=October; nummonth=10;;
133    Nov) month=November; nummonth=11;;
134    Dec) month=December; nummonth=12;;
135  esac
136done
137
138test -n "$month" || error "failed parsing '$ls_command /' output"
139
140# Get the extended ls output of the file or directory.
141set dummy x`eval "$ls_command \"\\\$save_arg1\""`
142
143# Remove all preceding arguments
144eval $command
145
146# Because of the dummy argument above, month is in $2.
147#
148# On a POSIX system, we should have
149#
150# $# = 5
151# $1 = file size
152# $2 = month
153# $3 = day
154# $4 = year or time
155# $5 = filename
156#
157# On Darwin 7.7.0 and 7.6.0, we have
158#
159# $# = 4
160# $1 = day
161# $2 = month
162# $3 = year or time
163# $4 = filename
164
165# Get the month.
166case $2 in
167  Jan) month=January; nummonth=1;;
168  Feb) month=February; nummonth=2;;
169  Mar) month=March; nummonth=3;;
170  Apr) month=April; nummonth=4;;
171  May) month=May; nummonth=5;;
172  Jun) month=June; nummonth=6;;
173  Jul) month=July; nummonth=7;;
174  Aug) month=August; nummonth=8;;
175  Sep) month=September; nummonth=9;;
176  Oct) month=October; nummonth=10;;
177  Nov) month=November; nummonth=11;;
178  Dec) month=December; nummonth=12;;
179esac
180
181case $3 in
182  ???*) day=$1;;
183  *) day=$3; shift;;
184esac
185
186# Here we have to deal with the problem that the ls output gives either
187# the time of day or the year.
188case $3 in
189  *:*) set `date`; eval year=\$$#
190       case $2 in
191         Jan) nummonthtod=1;;
192         Feb) nummonthtod=2;;
193         Mar) nummonthtod=3;;
194         Apr) nummonthtod=4;;
195         May) nummonthtod=5;;
196         Jun) nummonthtod=6;;
197         Jul) nummonthtod=7;;
198         Aug) nummonthtod=8;;
199         Sep) nummonthtod=9;;
200         Oct) nummonthtod=10;;
201         Nov) nummonthtod=11;;
202         Dec) nummonthtod=12;;
203       esac
204       # For the first six month of the year the time notation can also
205       # be used for files modified in the last year.
206       if (expr $nummonth \> $nummonthtod) > /dev/null;
207       then
208         year=`expr $year - 1`
209       fi;;
210  *) year=$3;;
211esac
212
213# The result.
214echo $day $month $year
215
216# Local Variables:
217# mode: shell-script
218# sh-indentation: 2
219# eval: (add-hook 'write-file-hooks 'time-stamp)
220# time-stamp-start: "scriptversion="
221# time-stamp-format: "%:y-%02m-%02d.%02H"
222# time-stamp-time-zone: "UTC"
223# time-stamp-end: "; # UTC"
224# End:
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