doc/mdate-sh

   1 #!/bin/sh
   2 # Get modification time of a file or directory and pretty-print it.
   3 # Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
   4 # written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, June 1995
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2, or (at your option)
   9 # any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software Foundation,
  18 # Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19
  20 # Prevent date giving response in another language.
  21 LANG=C
  22 export LANG
  23 LC_ALL=C
  24 export LC_ALL
  25 LC_TIME=C
  26 export LC_TIME
  27
  28 # Get the extended ls output of the file or directory.
  29 # On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below.
  30 if ls -L /dev/null 1>/dev/null 2>&1; then
  31   set - x`ls -L -l -d $1`
  32 else
  33   set - x`ls -l -d $1`
  34 fi
  35 # The month is at least the fourth argument
  36 # (3 shifts here, the next inside the loop).
  37 shift
  38 shift
  39 shift
  40
  41 # Find the month.  Next argument is day, followed by the year or time.
  42 month=
  43 until test $month
  44 do
  45   shift
  46   case $1 in
  47     Jan) month=January; nummonth=1;;
  48     Feb) month=February; nummonth=2;;
  49     Mar) month=March; nummonth=3;;
  50     Apr) month=April; nummonth=4;;
  51     May) month=May; nummonth=5;;
  52     Jun) month=June; nummonth=6;;
  53     Jul) month=July; nummonth=7;;
  54     Aug) month=August; nummonth=8;;
  55     Sep) month=September; nummonth=9;;
  56     Oct) month=October; nummonth=10;;
  57     Nov) month=November; nummonth=11;;
  58     Dec) month=December; nummonth=12;;
  59   esac
  60 done
  61
  62 day=$2
  63
  64 # Here we have to deal with the problem that the ls output gives either
  65 # the time of day or the year.
  66 case $3 in
  67   *:*) set `date`; eval year=\$$#
  68        case $2 in
  69          Jan) nummonthtod=1;;
  70          Feb) nummonthtod=2;;
  71          Mar) nummonthtod=3;;
  72          Apr) nummonthtod=4;;
  73          May) nummonthtod=5;;
  74          Jun) nummonthtod=6;;
  75          Jul) nummonthtod=7;;
  76          Aug) nummonthtod=8;;
  77          Sep) nummonthtod=9;;
  78          Oct) nummonthtod=10;;
  79          Nov) nummonthtod=11;;
  80          Dec) nummonthtod=12;;
  81        esac
  82        # For the first six month of the year the time notation can also
  83        # be used for files modified in the last year.
  84        if (expr $nummonth \> $nummonthtod) > /dev/null;
  85        then
  86          year=`expr $year - 1`
  87        fi;;
  88   *) year=$3;;
  89 esac
  90
  91 # The result.
  92 echo $day $month $year