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8cd092c9 | 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: |