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# Require a controlling input `terminal'.
tty -s || have_input_tty=no
test -t 1 || have_input_tty=no
if test "$have_input_tty" = no; then
echo "$0: This test must have a controlling input \`terminal'," 1>&2
echo " so it may not be run via \`batch', \`at', or \`rsh'." 1>&2
echo " On some systems, it may not even be run in the background." 1>&2
(exit 77); exit 77
fi
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