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1 | #!/bin/sh | ||
2 | # Get modification time of a file or directory and pretty-print it. | ||
3 | |||
4 | scriptversion=2009-04-28.21; # UTC | ||
5 | |||
6 | # Copyright (C) 1995, 1996, 1997, 2003, 2004, 2005, 2007, 2009 Free | ||
7 | # Software 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, see <http://www.gnu.org/licenses/>. | ||
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 | |||
32 | case $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 | ||
39 | Usage: mdate-sh [--help] [--version] FILE | ||
40 | |||
41 | Pretty-print the modification time of FILE. | ||
42 | |||
43 | Report bugs to <bug-automake@gnu.org>. | ||
44 | EOF | ||
45 | exit $? | ||
46 | ;; | ||
47 | -v | --v*) | ||
48 | echo "mdate-sh $scriptversion" | ||
49 | exit $? | ||
50 | ;; | ||
51 | esac | ||
52 | |||
53 | # Prevent date giving response in another language. | ||
54 | LANG=C | ||
55 | export LANG | ||
56 | LC_ALL=C | ||
57 | export LC_ALL | ||
58 | LC_TIME=C | ||
59 | export LC_TIME | ||
60 | |||
61 | # GNU ls changes its time format in response to the TIME_STYLE | ||
62 | # variable. Since we cannot assume `unset' works, revert this | ||
63 | # variable to its documented default. | ||
64 | if test "${TIME_STYLE+set}" = set; then | ||
65 | TIME_STYLE=posix-long-iso | ||
66 | export TIME_STYLE | ||
67 | fi | ||
68 | |||
69 | save_arg1=$1 | ||
70 | |||
71 | # Find out how to get the extended ls output of a file or directory. | ||
72 | if ls -L /dev/null 1>/dev/null 2>&1; then | ||
73 | ls_command='ls -L -l -d' | ||
74 | else | ||
75 | ls_command='ls -l -d' | ||
76 | fi | ||
77 | # Avoid user/group names that might have spaces, when possible. | ||
78 | if ls -n /dev/null 1>/dev/null 2>&1; then | ||
79 | ls_command="$ls_command -n" | ||
80 | fi | ||
81 | |||
82 | # A `ls -l' line looks as follows on OS/2. | ||
83 | # drwxrwx--- 0 Aug 11 2001 foo | ||
84 | # This differs from Unix, which adds ownership information. | ||
85 | # drwxrwx--- 2 root root 4096 Aug 11 2001 foo | ||
86 | # | ||
87 | # To find the date, we split the line on spaces and iterate on words | ||
88 | # until we find a month. This cannot work with files whose owner is a | ||
89 | # user named `Jan', or `Feb', etc. However, it's unlikely that `/' | ||
90 | # will be owned by a user whose name is a month. So we first look at | ||
91 | # the extended ls output of the root directory to decide how many | ||
92 | # words should be skipped to get the date. | ||
93 | |||
94 | # On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below. | ||
95 | set x`$ls_command /` | ||
96 | |||
97 | # Find which argument is the month. | ||
98 | month= | ||
99 | command= | ||
100 | until test $month | ||
101 | do | ||
102 | shift | ||
103 | # Add another shift to the command. | ||
104 | command="$command shift;" | ||
105 | case $1 in | ||
106 | Jan) month=January; nummonth=1;; | ||
107 | Feb) month=February; nummonth=2;; | ||
108 | Mar) month=March; nummonth=3;; | ||
109 | Apr) month=April; nummonth=4;; | ||
110 | May) month=May; nummonth=5;; | ||
111 | Jun) month=June; nummonth=6;; | ||
112 | Jul) month=July; nummonth=7;; | ||
113 | Aug) month=August; nummonth=8;; | ||
114 | Sep) month=September; nummonth=9;; | ||
115 | Oct) month=October; nummonth=10;; | ||
116 | Nov) month=November; nummonth=11;; | ||
117 | Dec) month=December; nummonth=12;; | ||
118 | esac | ||
119 | done | ||
120 | |||
121 | # Get the extended ls output of the file or directory. | ||
122 | set dummy x`eval "$ls_command \"\$save_arg1\""` | ||
123 | |||
124 | # Remove all preceding arguments | ||
125 | eval $command | ||
126 | |||
127 | # Because of the dummy argument above, month is in $2. | ||
128 | # | ||
129 | # On a POSIX system, we should have | ||
130 | # | ||
131 | # $# = 5 | ||
132 | # $1 = file size | ||
133 | # $2 = month | ||
134 | # $3 = day | ||
135 | # $4 = year or time | ||
136 | # $5 = filename | ||
137 | # | ||
138 | # On Darwin 7.7.0 and 7.6.0, we have | ||
139 | # | ||
140 | # $# = 4 | ||
141 | # $1 = day | ||
142 | # $2 = month | ||
143 | # $3 = year or time | ||
144 | # $4 = filename | ||
145 | |||
146 | # Get the month. | ||
147 | case $2 in | ||
148 | Jan) month=January; nummonth=1;; | ||
149 | Feb) month=February; nummonth=2;; | ||
150 | Mar) month=March; nummonth=3;; | ||
151 | Apr) month=April; nummonth=4;; | ||
152 | May) month=May; nummonth=5;; | ||
153 | Jun) month=June; nummonth=6;; | ||
154 | Jul) month=July; nummonth=7;; | ||
155 | Aug) month=August; nummonth=8;; | ||
156 | Sep) month=September; nummonth=9;; | ||
157 | Oct) month=October; nummonth=10;; | ||
158 | Nov) month=November; nummonth=11;; | ||
159 | Dec) month=December; nummonth=12;; | ||
160 | esac | ||
161 | |||
162 | case $3 in | ||
163 | ???*) day=$1;; | ||
164 | *) day=$3; shift;; | ||
165 | esac | ||
166 | |||
167 | # Here we have to deal with the problem that the ls output gives either | ||
168 | # the time of day or the year. | ||
169 | case $3 in | ||
170 | *:*) set `date`; eval year=\$$# | ||
171 | case $2 in | ||
172 | Jan) nummonthtod=1;; | ||
173 | Feb) nummonthtod=2;; | ||
174 | Mar) nummonthtod=3;; | ||
175 | Apr) nummonthtod=4;; | ||
176 | May) nummonthtod=5;; | ||
177 | Jun) nummonthtod=6;; | ||
178 | Jul) nummonthtod=7;; | ||
179 | Aug) nummonthtod=8;; | ||
180 | Sep) nummonthtod=9;; | ||
181 | Oct) nummonthtod=10;; | ||
182 | Nov) nummonthtod=11;; | ||
183 | Dec) nummonthtod=12;; | ||
184 | esac | ||
185 | # For the first six month of the year the time notation can also | ||
186 | # be used for files modified in the last year. | ||
187 | if (expr $nummonth \> $nummonthtod) > /dev/null; | ||
188 | then | ||
189 | year=`expr $year - 1` | ||
190 | fi;; | ||
191 | *) year=$3;; | ||
192 | esac | ||
193 | |||
194 | # The result. | ||
195 | echo $day $month $year | ||
196 | |||
197 | # Local Variables: | ||
198 | # mode: shell-script | ||
199 | # sh-indentation: 2 | ||
200 | # eval: (add-hook 'write-file-hooks 'time-stamp) | ||
201 | # time-stamp-start: "scriptversion=" | ||
202 | # time-stamp-format: "%:y-%02m-%02d.%02H" | ||
203 | # time-stamp-time-zone: "UTC" | ||
204 | # time-stamp-end: "; # UTC" | ||
205 | # End: | ||