Merge branch 'fix/type/__package_opkg/lock' into 'master'
__package_opkg: Add locking See merge request ungleich-public/cdist!896
This commit is contained in:
commit
684043bf37
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@ -1,7 +1,8 @@
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#!/bin/sh
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#!/bin/sh -e
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#
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# 2011 Nico Schottelius (nico-cdist at schottelius.org)
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# 2012 Giel van Schijndel (giel plus cdist at mortis dot eu)
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# 2020 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
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#
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# This file is part of cdist.
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#
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@ -19,21 +20,78 @@
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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#
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# Retrieve the status of a package - parsed opkg output
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# Retrieve the status of a package - parses opkg output
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#
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if [ -f "$__object/parameter/name" ]; then
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name="$(cat "$__object/parameter/name")"
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readonly __type_path=${__object%%${__object_id}*}
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test -d "${__type_path}" || { echo 'Cannot determine __type_path' >&2; exit 1; }
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readonly LOCKFILE="${__type_path:?}/.cdist_opkg.lock"
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if command -v flock >/dev/null 2>&1
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then
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# use flock (if available) on FD 9
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_lock() {
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exec 9<>"${LOCKFILE:?}"
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flock -x 9
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echo $$>&9
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}
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_unlock() {
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:>"${LOCKFILE:?}"
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flock -u 9
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exec 9<&-
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}
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else
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name="$__object_id"
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# fallback to mkdir if flock is missing
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_lock() {
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until mkdir "${LOCKFILE:?}.dir" 2>/dev/null
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do
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while test -d "${LOCKFILE}.dir"
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do
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# DEBUG:
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# printf 'Locked by PID: %u\n' "$(cat "${LOCKFILE}.dir/pid")"
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sleep 1
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done
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done
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echo $$ >"${LOCKFILE:?}.dir/pid"
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}
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_unlock() {
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test -d "${LOCKFILE}.dir" || return 0
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if test -s "${LOCKFILE}.dir/pid"
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then
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test "$(cat "${LOCKFILE}.dir/pid")" = $$ || return 1
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rm "${LOCKFILE:?}.dir/pid"
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fi
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rmdir "${LOCKFILE:?}.dir"
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}
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fi
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# Except dpkg failing, if package is not known / installed
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if opkg status "$name" 2>/dev/null | grep -q "^Status: install user installed$"; then
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echo "present"
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exit 0
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elif [ "$(opkg info "$name" 2> /dev/null | wc -l)" -eq 0 ]; then
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echo "absent notpresent"
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exit 0
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if test -f "${__object}/parameter/name"
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then
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pkg_name=$(cat "${__object}/parameter/name")
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else
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pkg_name=$__object_id
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fi
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# NOTE: We need to lock parallel execution of type explorers and code-remote
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# because opkg will try to acquire the OPKG lock (usually /var/lock/opkg.lock)
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# using lockf(2) for every operation.
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# It will not wait for the lock but terminate with an error.
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# This leads to incorrect 'absent notpresent' statuses when parallel execution
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# is enabled.
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trap _unlock EXIT
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_lock
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# Except opkg failing, if package is not known / installed
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if opkg status "${pkg_name}" 2>/dev/null \
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| grep -q -e '^Status: [^ ][^ ]* [^ ][^ ]* installed$'
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then
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echo 'present'
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elif opkg info "${pkg_name}" 2>/dev/null | grep -q .
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then
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echo 'absent notpresent'
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else
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echo 'absent'
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fi
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echo "absent"
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@ -2,6 +2,7 @@
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#
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# 2011,2013 Nico Schottelius (nico-cdist at schottelius.org)
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# 2012 Giel van Schijndel (giel plus cdist at mortis dot eu)
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# 2020 Dennis Camera (dennis.camera at ssrq-sds-fds.ch)
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#
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# This file is part of cdist.
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#
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@ -19,41 +20,50 @@
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# along with cdist. If not, see <http://www.gnu.org/licenses/>.
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#
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#
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# Manage packages on OpenWRT and co.
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# Manage packages on OpenWrt, optware, and co.
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#
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if [ -f "$__object/parameter/name" ]; then
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name="$(cat "$__object/parameter/name")"
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if test -f "${__object}/parameter/name"
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then
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name=$(cat "${__object}/parameter/name")
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else
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name="$__object_id"
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name=$__object_id
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fi
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state_should="$(cat "$__object/parameter/state")"
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state_should=$(cat "${__object}/parameter/state")
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state_is=$(cat "${__object}/explorer/pkg_status")
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state_is="$(cat "$__object/explorer/pkg_status")"
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case "$state_is" in
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absent*)
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present="$(echo "$state_is" | cut -d ' ' -f 2)"
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state_is="absent"
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;;
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case $state_is
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in
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(absent*)
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presence=$(echo "${state_is}" | cut -d ' ' -f 2)
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state_is='absent'
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;;
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esac
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[ "$state_is" = "$state_should" ] && exit 0
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if test "${state_is}" = "${state_should}"
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then
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exit 0
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fi
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case "$state_should" in
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present)
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if [ "$present" = "notpresent" ]; then
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echo "opkg --verbosity=0 update"
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fi
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echo "opkg --verbosity=0 install '$name'"
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echo "installed" >> "$__messages_out"
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;;
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absent)
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echo "opkg --verbosity=0 remove '$name'"
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echo "removed" >> "$__messages_out"
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;;
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*)
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echo "Unknown state: ${state_should}" >&2
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exit 1
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;;
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case $state_should
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in
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(present)
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if test "${presence}" = 'notpresent'
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then
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echo 'opkg --verbosity=0 update'
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fi
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printf "opkg --verbosity=0 install '%s'\n" "${name}"
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echo 'installed' >>"${__messages_out}"
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;;
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(absent)
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printf "opkg --verbosity=0 remove '%s'" "${name}"
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echo 'removed' >>"${__messages_out}"
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;;
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(*)
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printf 'Unknown state: %s\n' "${state_should}" >&2
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exit 1
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;;
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esac
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