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#!/bin/sh
# Mark items as read/unread: the input is the read / unread URL per line.
usage() {
echo "usage: $0 <read|unread> [urlfile]" >&2
echo "" >&2
echo "An urlfile must be specified as an argument or with the environment variable \$SFEED_URL_FILE" >&2
exit 1
}
urlfile="${2:-${SFEED_URL_FILE}}"
if test -z "${urlfile}"; then
usage
fi
case "$1" in
read)
cat >> "${urlfile}"
;;
unread)
tmp=$(mktemp)
trap "rm -f ${tmp}" EXIT
test -f "${urlfile}" || touch "${urlfile}" 2>/dev/null
LC_ALL=C awk -F '\t' '
{ FILENR += (FNR == 1) }
FILENR == 1 { urls[$0] = 1 }
FILENR == 2 { if (!urls[$0]) { print $0 } }
END { exit(FILENR != 2) }' \
"-" "${urlfile}" > "${tmp}" && \
cp "${tmp}" "${urlfile}"
;;
*)
usage
;;
esac
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