fb - 日付・連番つきでファイルをコピーするスクリプトコマンド

#!/bin/sh
# fb - file backup with timestamp and sequensal numbers
# usage : $0 filename [filename [...]]

today=`date '+%Y%m%d'`

for fn in $*
do
  seq=''

  # file name conflict check
  while [ -e "${fn}.${today}${seq}" ]
    do
    seq=`expr ${seq:-0} - 1`
  done

  /bin/cp -aiv $fn "${fn}.${today}${seq}"
done