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#!/bin/sh
# Interrupt a pipe with manual /dev/tty input to a program
self=pst
# Don't accept terminal as stdin
if [ -t 0 ] ; then
printf >&2 '%s: stdin is a term\n' "$self"
exit 2
fi
# Create a temporary directory with name in $td, and handle POSIX-ish traps to
# remove it when the script exits.
td=
cleanup() {
[ -n "$td" ] && rm -fr -- "$td"
if [ "$1" != EXIT ] ; then
trap - "$1"
kill "-$1" "$$"
fi
}
for sig in EXIT HUP INT TERM ; do
# shellcheck disable=SC2064
trap "cleanup $sig" "$sig"
done
td=$(mktd "$self") || exit
# Run the interactive command on the temporary file forcing /dev/tty as
# input/output
tf=$td/data
cat - > "$tf" || exit
"${@:-"${PAGER:-more}"}" "$tf" </dev/tty >/dev/tty
cat -- "$tf" || exit
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