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1.1 root 1: #!/bin/sh
2: # Get modification time of a file or directory and pretty-print it.
3:
1.1.1.2 ! root 4: scriptversion=2015-04-09.19; # UTC
1.1 root 5:
1.1.1.2 ! root 6: # Copyright (C) 1995-2014 Free Software Foundation, Inc.
1.1 root 7: # written by Ulrich Drepper <[email protected]>, 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 <[email protected]> or send patches to
29: # <[email protected]>.
30:
31: if 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
38: fi
39:
40: case $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
47: Usage: mdate-sh [--help] [--version] FILE
48:
49: Pretty-print the modification day of FILE, in the format:
50: 1 January 1970
51:
52: Report bugs to <[email protected]>.
53: EOF
54: exit $?
55: ;;
56: -v | --v*)
57: echo "mdate-sh $scriptversion"
58: exit $?
59: ;;
60: esac
61:
62: error ()
63: {
64: echo "$0: $1" >&2
65: exit 1
66: }
67:
68:
69: # Prevent date giving response in another language.
70: LANG=C
71: export LANG
72: LC_ALL=C
73: export LC_ALL
74: LC_TIME=C
75: export LC_TIME
76:
1.1.1.2 ! root 77: # Use UTC to get reproducible result
! 78: TZ=UTC
! 79: export TZ
! 80:
1.1 root 81: # GNU ls changes its time format in response to the TIME_STYLE
82: # variable. Since we cannot assume 'unset' works, revert this
83: # variable to its documented default.
84: if test "${TIME_STYLE+set}" = set; then
85: TIME_STYLE=posix-long-iso
86: export TIME_STYLE
87: fi
88:
89: save_arg1=$1
90:
91: # Find out how to get the extended ls output of a file or directory.
92: if ls -L /dev/null 1>/dev/null 2>&1; then
93: ls_command='ls -L -l -d'
94: else
95: ls_command='ls -l -d'
96: fi
97: # Avoid user/group names that might have spaces, when possible.
98: if ls -n /dev/null 1>/dev/null 2>&1; then
99: ls_command="$ls_command -n"
100: fi
101:
102: # A 'ls -l' line looks as follows on OS/2.
103: # drwxrwx--- 0 Aug 11 2001 foo
104: # This differs from Unix, which adds ownership information.
105: # drwxrwx--- 2 root root 4096 Aug 11 2001 foo
106: #
107: # To find the date, we split the line on spaces and iterate on words
108: # until we find a month. This cannot work with files whose owner is a
109: # user named "Jan", or "Feb", etc. However, it's unlikely that '/'
110: # will be owned by a user whose name is a month. So we first look at
111: # the extended ls output of the root directory to decide how many
112: # words should be skipped to get the date.
113:
114: # On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below.
115: set x`$ls_command /`
116:
117: # Find which argument is the month.
118: month=
119: command=
120: until test $month
121: do
122: test $# -gt 0 || error "failed parsing '$ls_command /' output"
123: shift
124: # Add another shift to the command.
125: command="$command shift;"
126: case $1 in
127: Jan) month=January; nummonth=1;;
128: Feb) month=February; nummonth=2;;
129: Mar) month=March; nummonth=3;;
130: Apr) month=April; nummonth=4;;
131: May) month=May; nummonth=5;;
132: Jun) month=June; nummonth=6;;
133: Jul) month=July; nummonth=7;;
134: Aug) month=August; nummonth=8;;
135: Sep) month=September; nummonth=9;;
136: Oct) month=October; nummonth=10;;
137: Nov) month=November; nummonth=11;;
138: Dec) month=December; nummonth=12;;
139: esac
140: done
141:
142: test -n "$month" || error "failed parsing '$ls_command /' output"
143:
144: # Get the extended ls output of the file or directory.
145: set dummy x`eval "$ls_command \"\\\$save_arg1\""`
146:
147: # Remove all preceding arguments
148: eval $command
149:
150: # Because of the dummy argument above, month is in $2.
151: #
152: # On a POSIX system, we should have
153: #
154: # $# = 5
155: # $1 = file size
156: # $2 = month
157: # $3 = day
158: # $4 = year or time
159: # $5 = filename
160: #
161: # On Darwin 7.7.0 and 7.6.0, we have
162: #
163: # $# = 4
164: # $1 = day
165: # $2 = month
166: # $3 = year or time
167: # $4 = filename
168:
169: # Get the month.
170: case $2 in
171: Jan) month=January; nummonth=1;;
172: Feb) month=February; nummonth=2;;
173: Mar) month=March; nummonth=3;;
174: Apr) month=April; nummonth=4;;
175: May) month=May; nummonth=5;;
176: Jun) month=June; nummonth=6;;
177: Jul) month=July; nummonth=7;;
178: Aug) month=August; nummonth=8;;
179: Sep) month=September; nummonth=9;;
180: Oct) month=October; nummonth=10;;
181: Nov) month=November; nummonth=11;;
182: Dec) month=December; nummonth=12;;
183: esac
184:
185: case $3 in
186: ???*) day=$1;;
187: *) day=$3; shift;;
188: esac
189:
190: # Here we have to deal with the problem that the ls output gives either
191: # the time of day or the year.
192: case $3 in
193: *:*) set `date`; eval year=\$$#
194: case $2 in
195: Jan) nummonthtod=1;;
196: Feb) nummonthtod=2;;
197: Mar) nummonthtod=3;;
198: Apr) nummonthtod=4;;
199: May) nummonthtod=5;;
200: Jun) nummonthtod=6;;
201: Jul) nummonthtod=7;;
202: Aug) nummonthtod=8;;
203: Sep) nummonthtod=9;;
204: Oct) nummonthtod=10;;
205: Nov) nummonthtod=11;;
206: Dec) nummonthtod=12;;
207: esac
208: # For the first six month of the year the time notation can also
209: # be used for files modified in the last year.
210: if (expr $nummonth \> $nummonthtod) > /dev/null;
211: then
212: year=`expr $year - 1`
213: fi;;
214: *) year=$3;;
215: esac
216:
217: # The result.
218: echo $day $month $year
219:
220: # Local Variables:
221: # mode: shell-script
222: # sh-indentation: 2
223: # eval: (add-hook 'write-file-hooks 'time-stamp)
224: # time-stamp-start: "scriptversion="
225: # time-stamp-format: "%:y-%02m-%02d.%02H"
226: # time-stamp-time-zone: "UTC"
227: # time-stamp-end: "; # UTC"
228: # End:
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