1 files changed, 45 insertions, 0 deletions

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+#!/bin/sh
+# -*- sh -*-
+# update feeds, merge with old feeds using xargs in parallel mode (non-POSIX).
+
+# include script and reuse its functions, but do not start main().
+SFEED_UPDATE_INCLUDE="1" . sfeed_update
+# load config file, sets $config.
+loadconfig "$1"
+
+# process a single feed.
+# args are: config, tmpdir, name, feedurl, basesiteurl, encoding
+if [ "${SFEED_UPDATE_CHILD}" = "1" ]; then
+        sfeedtmpdir="$2"
+        _feed "$3" "$4" "$5" "$6"
+        exit $?
+fi
+
+# ...else parent mode:
+
+# feed(name, feedurl, basesiteurl, encoding)
+feed() {
+        # workaround: *BSD xargs doesn't handle empty fields in the middle.
+        name="${1:-$$}"
+        feedurl="${2:-http://}"
+        basesiteurl="${3:-${feedurl}}"
+        encoding="$4"
+
+        printf '%s\0%s\0%s\0%s\0%s\0%s\0' "${config}" "${sfeedtmpdir}" \
+                "${name}" "${feedurl}" "${basesiteurl}" "${encoding}"
+}
+
+# fetch feeds and store in temporary directory.
+sfeedtmpdir="$(mktemp -d '/tmp/sfeed_XXXXXX')"
+mkdir -p "${sfeedtmpdir}/feeds"
+touch "${sfeedtmpdir}/ok"
+# make sure path exists.
+mkdir -p "${sfeedpath}"
+# print feeds for parallel processing with xargs.
+feeds | SFEED_UPDATE_CHILD="1" xargs -r -0 -P "${maxjobs}" -L 6 "$(readlink -f "$0")"
+status=$?
+# check error exit status indicator for parallel jobs.
+test -f "${sfeedtmpdir}/ok" || status=1
+# cleanup temporary files etc.
+cleanup
+exit ${status}