175 lines
4.2 KiB
Bash
Executable File
175 lines
4.2 KiB
Bash
Executable File
#!/bin/bash -e
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#---------------------------------------------------------------------
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# Script to display a "binary clock" using unicode characters from the
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# braille block.
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#
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# Designed to work with the wonderful byobu(1) but can be run
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# stand-alone.
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#---------------------------------------------------------------------
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#
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# Copyright (C) 2011 Canonical Ltd.
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#
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# Author: James Hunt <james.hunt@canonical.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, version 3 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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#---------------------------------------------------------------------
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script_name=${0##*/}
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# Selected Unicode Braille characters:
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#
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# 0x2800, 0x2880, 0x2820, 0x28a0, 0x2810, 0x2890, 0x2830, 0x28b0, 0x2808, 0x2888,
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# 0x2840, 0x28c0, 0x2860, 0x28e0, 0x2850, 0x28d0, 0x2870, 0x28f0, 0x2848, 0x28c8,
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# 0x2804, 0x2884, 0x2824, 0x28a4, 0x2814, 0x2894, 0x2834, 0x28b4, 0x280c, 0x288c,
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# 0x2844, 0x28c4, 0x2864, 0x28e4, 0x2854, 0x28d4, 0x287b, 0x28f4, 0x284c, 0x28cc,
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# 0x2802, 0x2882, 0x2822, 0x28a2, 0x2812, 0x2892, 0x2832, 0x28b2, 0x280a, 0x288a,
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# 0x2842, 0x28c2, 0x2862, 0x28e2, 0x2852, 0x28d2, 0x2872, 0x28f2, 0x284a, 0x28ca,
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# 0x2806, 0x2886
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#
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# Index of this array is 0-61 with character returned being
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# "two column" binary representation of a time segment.
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#
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binary=(⠀ ⢀ ⠠ ⢠ ⠐ ⢐ ⠰ ⢰ ⠈ ⢈ \
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⡀ ⣀ ⡠ ⣠ ⡐ ⣐ ⡰ ⣰ ⡈ ⣈ \
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⠄ ⢄ ⠤ ⢤ ⠔ ⢔ ⠴ ⢴ ⠌ ⢌ \
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⡄ ⣄ ⡤ ⣤ ⡔ ⣔ ⡻ ⣴ ⡌ ⣌ \
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⠂ ⢂ ⠢ ⢢ ⠒ ⢒ ⠲ ⢲ ⠊ ⢊ \
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⡂ ⣂ ⡢ ⣢ ⡒ ⣒ ⡲ ⣲ ⡊ ⣊ ⠆ ⢆)
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usage()
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{
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cat <<EOT
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Description: A clock that displays the time in binary.
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Usage: $script_name [options]
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Options:
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-b : Display binary clock (default)
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-h : Show this help.
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-l : Display leading zeros (hex and octal modes only).
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-m : Show time in 24-hour military format
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(default: 12-hour format).
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-n : Suppress newline at end of time.
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-o : Display time in octal (base 8).
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-s <sep> : Specify separator between hours and minutes
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(and seconds if not disabled).
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-u : Display alphabetics in upper-case (hex mode only).
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-x : Disable time in hexadecimal (base 16).
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-z : Disable display of seconds.
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EOT
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}
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suppress_seconds=n
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clock_type=binary
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format=std
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ending=""
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uppercase=n
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leading_zeros=n
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while getopts "bhlmnos:uxz" opt
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do
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case "$opt" in
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b)
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clock_type=binary
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;;
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h)
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usage
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exit 0
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;;
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l)
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leading_zeros=y
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;;
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m)
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format=mil
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;;
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n)
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ending=
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;;
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o)
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clock_type=oct
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;;
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s)
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sep=$OPTARG
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;;
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u)
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uppercase=y
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;;
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x)
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clock_type=hex
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;;
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z)
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suppress_seconds=y
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;;
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esac
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done
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if [ -z "$clock_type" ]
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then
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printf "%s\n" "ERROR: must specify clock type"
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exit 1
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fi
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shift $[$OPTIND-1]
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# get current time, handling 12-hour or 24-hour
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if [ $format = std ]
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then
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hrs_format=%l
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else
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hrs_format=%k
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fi
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time=($(date "+${hrs_format} %M %S"))
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h=$(printf ${time[0]})
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m=$(printf ${time[1]})
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s=$(printf ${time[2]})
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if [ $clock_type = binary ]
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then
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[ $suppress_seconds = n ] && seconds="${sep}${binary[10#$s]}"
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display_time="${binary[10#$h]}${sep}${binary[10#$m]}${seconds}${ending}"
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else
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if [ $clock_type = hex ]
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then
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conversion=x
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[ $uppercase = y ] && conversion=X
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else
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conversion=o
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fi
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precision=
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[ $leading_zeros = y ] && precision=.2
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base_format=%2${precision}${conversion}
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hh=$(printf "$base_format" $h)
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hm=$(printf "$base_format" $m)
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[ "$suppress_seconds" = n ] && hs="${sep}$(printf "$base_format" $s)"
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display_time="${hh}${sep}${hm}${hs}${ending}"
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fi
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color k w
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printf "%s" "$display_time"
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color --
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