#!/bin/ksh
#
# $Id: lsd,v 1.4 2009/01/01 01:57:12 vogelke Exp $
#
# list all of the files in a directory modified within
# a given range of dates, or on just one specific date.
#
# relies on GNU versions of find and date.
#
# usage: lsd -s date [-e date] file [file...]
# -s date: start (or only) date.
# -e date: end date (optional); defaults to start plus 1 day.
#
# example:
#   me% lsd -s 'aug 10' -e 'aug 14' /tmp
#   -rw-r--r-- bin bin    41473 2007-08-10+23:59:04 /bkup/2007-08-10
#   -rw-r--r-- bin bin    59073 2007-08-11+23:59:04 /bkup/2007-08-11
#   -rw-r--r-- bin bin  1095227 2007-08-12+23:59:03 /bkup/2007-08-12
#   -rw-r--r-- bin bin    48586 2007-08-13+23:59:04 /bkup/2007-08-13
#   -rw-r--r-- bin bin    88148 2007-08-14+23:59:03 /bkup/2007-08-14

PATH=/bin:/usr/bin:/usr/local/bin:/opt/sfw/bin
export PATH
tag=`basename $0`

# Return epoch equivalent of a day starting at midnight.
midnight () {
    x=`gdate -d "$1" "+%Y/%m/%d"`
    rc=`gdate -d $x +%s`
    echo $rc
}

die () {
    echo "$tag: $*" >& 2
    exit 1
}

# Set the starting and ending dates.

while getopts "e:s:" flag
do
    case "$flag" in
        s)  start=`midnight "$OPTARG"` ;;
        e)  end=`midnight "$OPTARG"` ;;
    esac
done

case "$start" in
    "") start=`midnight today` ;;
    *)  ;;
esac

case "$end" in
    "")     end=$((start+86400)) ;;
    $start) end=$((start+86400)) ;;
    *)      end=$((end+86400)) ;;    # want the end of the day.
esac

test "$start" -le "$end" || die "dates out of order"

case "$*" in
    "") set . ;;
    *)  ;;
esac

# Print files plus mod times in epoch format, weed out
# everything not between desired dates.  This will mess
# up if you have a tab embedded in a filename, but you
# deserve that for putting tabs in filenames.

shift $((OPTIND-1))

gfind $* -maxdepth 1 -printf "%T@\t%M\t%u\t%s\t%T+\t%p\n" |
    sort -n |
    awk '
      BEGIN { FS = "\t" }
      $6 != "." {
        if ($1 >= '"$start"' && $1 <= '"$end"')
          printf "%s %8s %8d %s %s\n", $2,$3,$4,$5,$6
      }'

exit 0