randsleep

   1 #!/usr/bin/env bash
   2
   3 #==============================================================================
   4 # randsleep
   5 # File ID: 23f387f0-7b1d-11ea-94a3-db5caa6d21d3
   6 #
   7 # Sleep for a random amount of time.
   8 #
   9 # Author: Øyvind A. Holm <sunny@sunbase.org>
  10 # License: GNU General Public License version 2 or later.
  11 #==============================================================================
  12
  13 progname=randsleep
  14 VERSION=0.1.0
  15
  16 ARGS="$(getopt -o "\
  17 h\
  18 q\
  19 v\
  20 " -l "\
  21 help,\
  22 quiet,\
  23 verbose,\
  24 version,\
  25 " -n "$progname" -- "$@")"
  26 test "$?" = "0" || exit 1
  27 eval set -- "$ARGS"
  28
  29 opt_help=0
  30 opt_quiet=0
  31 opt_verbose=0
  32 while :; do
  33         case "$1" in
  34                 -h|--help) opt_help=1; shift ;;
  35                 -q|--quiet) opt_quiet=$(($opt_quiet + 1)); shift ;;
  36                 -v|--verbose) opt_verbose=$(($opt_verbose + 1)); shift ;;
  37                 --version) echo $progname $VERSION; exit 0 ;;
  38                 --) shift; break ;;
  39                 *) echo $progname: Internal error >&2; exit 1 ;;
  40         esac
  41 done
  42 opt_verbose=$(($opt_verbose - $opt_quiet))
  43
  44 if test "$opt_help" = "1"; then
  45         test $opt_verbose -gt 0 && { echo; echo $progname $VERSION; }
  46         cat <<END
  47
  48 Sleep for a random amount of time.
  49
  50 Usage: $progname [options] [MIN_SECS [RANDOM_SECS]]
  51
  52 Sleep for MIN_SECS + RANDOM_SECS seconds. If no command line args are
  53 specified, use 30 for both values.
  54
  55 Options:
  56
  57   -h, --help
  58     Show this help.
  59   -q, --quiet
  60     Be more quiet. Can be repeated to increase silence.
  61   -v, --verbose
  62     Increase level of verbosity. Can be repeated. One -v displays a
  63     status message with sleep time.
  64   --version
  65     Print version information.
  66
  67 END
  68         exit 0
  69 fi
  70
  71 minsecs=30
  72 randsecs=30
  73
  74 test -n "$1" && minsecs="$1"
  75 test -n "$2" && randsecs="$2"
  76 if echo "$minsecs$randsecs" | tr -d '[0-9]' | grep -q .; then
  77         echo $progname: Arguments must be integer only >&2
  78         exit 1
  79 fi
  80
  81 test $randsecs -eq 0 && randsecs=1
  82 secs=$(($minsecs + $RANDOM % $randsecs))
  83 test $opt_verbose -ge 1 && echo -n $(date +%H:%M:%S) sleep $secs...
  84 sleep $secs
  85 test $opt_verbose -ge 1 && echo done
  86
  87 # vim: set ts=8 sw=8 sts=8 noet fo+=w tw=79 fenc=UTF-8 :