1 | #!/bin/sh
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2 |
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3 | scroll_top=1
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4 | scroll_bottom=15
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5 | scroll_count=4
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6 |
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7 | i=1
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8 | while [ $i -le 24 ]
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9 | do
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10 | printf 'line %2d ' $i
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11 | j=0
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12 | while [ $j -lt $i ]
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13 | do
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14 | printf '*'
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15 | j=$(($j + 1))
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16 | done
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17 | printf '\n'
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18 | i=$(($i + 1))
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19 | done
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20 |
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21 | printf 'about to scroll %d-%d up by %d... ' $scroll_top $scroll_bottom $scroll_count
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22 | sleep 2
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23 |
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24 | # set scroll region
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25 | printf "\e[${scroll_top};${scroll_bottom}r"
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26 |
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27 | # move to first line of scroll region
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28 | printf "\e[${scroll_top};1H"
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29 |
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30 | # scroll up
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31 | printf "\e[${scroll_count}M"
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32 |
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33 | sleep 2
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34 |
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35 | # clear scroll region
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36 | printf '\e[r'
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