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| 1 | #!/bin/bash
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| 2 | #
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| 3 | # scrollbar - display scrolling text
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| 4 | #
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| 5 | # usage: scrollbar args
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| 6 | #
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| 7 | # A cute hack originally from Heiner Steven <hs@bintec.de>
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| 8 | #
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| 9 | # converted from ksh syntax to bash v2 syntax by Chet Ramey
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| 10 |
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| 11 | WIDTH=${COLUMNS:-80}
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| 12 | WMINUS=$(( $WIDTH - 1 ))
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| 13 |
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| 14 | [ $# -lt 1 ] && set -- TESTING
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| 15 |
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| 16 | # use the bash-2.02 printf builtin
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| 17 | Text=$(printf "%-${WIDTH}s" "$*")
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| 18 | Text=${Text// /_}
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| 19 |
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| 20 | while :
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| 21 | do
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| 22 | printf "%-.${WIDTH}s\r" "$Text"
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| 23 | LastC=${Text:${WMINUS}:1}
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| 24 | Text="$LastC""${Text%?}"
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| 25 | done
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