Annotation of embedaddon/quagga/doc/mdate-sh, revision 1.1.1.1

1.1       misho       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:

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