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# Read the standard input and only shows dots in the output, filtering out
# all the other characters. Designed to avoid bufferization so that when
# we get the output of redis-trib and want to show just the dots, we'll see
# the dots as soon as redis-trib will output them.
fconfigure stdin -buffering none
while 1 {
set c [read stdin 1]
if {$c eq {}} {
exit 0; # EOF
} elseif {$c eq {.}} {
puts -nonewline .
flush stdout
}
}
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