Annotation of embedaddon/quagga/doc/mdate-sh, revision 1.1.1.3
1.1 misho 1: #!/bin/sh
2: # Get modification time of a file or directory and pretty-print it.
3:
1.1.1.2 misho 4: scriptversion=2010-08-21.06; # UTC
1.1 misho 5:
1.1.1.3 ! misho 6: # Copyright (C) 1995-2012 Free Software Foundation, Inc.
1.1 misho 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:
1.1.1.2 misho 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:
1.1 misho 40: case $1 in
41: '')
1.1.1.3 ! misho 42: echo "$0: No file. Try '$0 --help' for more information." 1>&2
1.1 misho 43: exit 1;
44: ;;
45: -h | --h*)
46: cat <<\EOF
47: Usage: mdate-sh [--help] [--version] FILE
48:
1.1.1.2 misho 49: Pretty-print the modification day of FILE, in the format:
50: 1 January 1970
1.1 misho 51:
52: Report bugs to <bug-automake@gnu.org>.
53: EOF
54: exit $?
55: ;;
56: -v | --v*)
57: echo "mdate-sh $scriptversion"
58: exit $?
59: ;;
60: esac
61:
1.1.1.2 misho 62: error ()
63: {
64: echo "$0: $1" >&2
65: exit 1
66: }
67:
68:
1.1 misho 69: # Prevent date giving response in another language.
70: LANG=C
71: export LANG
72: LC_ALL=C
73: export LC_ALL
74: LC_TIME=C
75: export LC_TIME
76:
77: # GNU ls changes its time format in response to the TIME_STYLE
1.1.1.3 ! misho 78: # variable. Since we cannot assume 'unset' works, revert this
1.1 misho 79: # variable to its documented default.
80: if test "${TIME_STYLE+set}" = set; then
81: TIME_STYLE=posix-long-iso
82: export TIME_STYLE
83: fi
84:
85: save_arg1=$1
86:
87: # Find out how to get the extended ls output of a file or directory.
88: if ls -L /dev/null 1>/dev/null 2>&1; then
89: ls_command='ls -L -l -d'
90: else
91: ls_command='ls -l -d'
92: fi
93: # Avoid user/group names that might have spaces, when possible.
94: if ls -n /dev/null 1>/dev/null 2>&1; then
95: ls_command="$ls_command -n"
96: fi
97:
1.1.1.3 ! misho 98: # A 'ls -l' line looks as follows on OS/2.
1.1 misho 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
1.1.1.3 ! misho 105: # user named "Jan", or "Feb", etc. However, it's unlikely that '/'
1.1 misho 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.
111: set x`$ls_command /`
112:
113: # Find which argument is the month.
114: month=
115: command=
116: until test $month
117: do
1.1.1.3 ! misho 118: test $# -gt 0 || error "failed parsing '$ls_command /' output"
1.1 misho 119: shift
120: # Add another shift to the command.
121: command="$command shift;"
122: case $1 in
123: Jan) month=January; nummonth=1;;
124: Feb) month=February; nummonth=2;;
125: Mar) month=March; nummonth=3;;
126: Apr) month=April; nummonth=4;;
127: May) month=May; nummonth=5;;
128: Jun) month=June; nummonth=6;;
129: Jul) month=July; nummonth=7;;
130: Aug) month=August; nummonth=8;;
131: Sep) month=September; nummonth=9;;
132: Oct) month=October; nummonth=10;;
133: Nov) month=November; nummonth=11;;
134: Dec) month=December; nummonth=12;;
135: esac
136: done
137:
1.1.1.3 ! misho 138: test -n "$month" || error "failed parsing '$ls_command /' output"
1.1.1.2 misho 139:
1.1 misho 140: # Get the extended ls output of the file or directory.
1.1.1.2 misho 141: set dummy x`eval "$ls_command \"\\\$save_arg1\""`
1.1 misho 142:
143: # Remove all preceding arguments
144: eval $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.
166: case $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;;
179: esac
180:
181: case $3 in
182: ???*) day=$1;;
183: *) day=$3; shift;;
184: esac
185:
186: # Here we have to deal with the problem that the ls output gives either
187: # the time of day or the year.
188: case $3 in
189: *:*) set `date`; eval year=\$$#
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;;
211: esac
212:
213: # The result.
214: echo $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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