age

   1 #!/bin/sh
   2
   3 #==============================================================================
   4 # age
   5 # File ID: 9b034192-0a68-11e2-98ae-fefdb24f8e10
   6 # Author: Øyvind A. Holm <sunny@sunbase.org>
   7 # License: GNU General Public License version 2 or later.
   8 #==============================================================================
   9
  10 progname=age
  11 VERSION=0.2.0
  12
  13 opt_help=0
  14 opt_quiet=0
  15 opt_seconds=0
  16 opt_verbose=0
  17 while test -n "$1"; do
  18         case "$1" in
  19         -h|--help) opt_help=1; shift ;;
  20         -q|--quiet) opt_quiet=$(($opt_quiet + 1)); shift ;;
  21         -s|--seconds) opt_seconds=1; shift ;;
  22         -v|--verbose) opt_verbose=$(($opt_verbose + 1)); shift ;;
  23         --version) echo $progname $VERSION; exit 0 ;;
  24         --) shift; break ;;
  25         *)
  26                 if printf '%s\n' "$1" | grep -q ^-; then
  27                         echo "$progname: $1: Unknown option" >&2
  28                         exit 1
  29                 else
  30                         break
  31                 fi
  32         break ;;
  33         esac
  34 done
  35 opt_verbose=$(($opt_verbose - $opt_quiet))
  36
  37 if test "$opt_help" = "1"; then
  38         test $opt_verbose -gt 0 && { echo; echo $progname $VERSION; }
  39         cat <<END
  40
  41 Print number of seconds since the UTC timestamp specified on the command
  42 line, use format "YYYY-MM-DD [HH:MM[:SS]]" or any other format
  43 understood by sqlite3. If two timestamps are specified, print number of
  44 seconds between them.
  45
  46 Usage: $progname [options] date1 [date2]
  47
  48 Options:
  49
  50   -h, --help
  51     Show this help.
  52   -q, --quiet
  53     Be more quiet. Can be repeated to increase silence.
  54   -s, --seconds
  55     Display seconds instead of the default datefmt(1) output.
  56   -v, --verbose
  57     Increase level of verbosity. Can be repeated.
  58   --version
  59     Print version information.
  60
  61 END
  62         exit 0
  63 fi
  64
  65 test -z "$1" && {
  66         echo $progname: Missing arguments >&2
  67         exit 1
  68 }
  69 begin=$1
  70 end=now # Memento mori
  71 test -n "$2" && end=$2
  72
  73 cat <<END | sqlite3 | (test "$opt_seconds" = "1" && cat || datefmt)
  74 SELECT strftime('%s', datetime('$end'))
  75        - strftime('%s', datetime('$begin'));
  76 END
  77
  78 # vim: set ts=8 sw=8 sts=8 noet fo+=w tw=79 fenc=UTF-8 :