89c8e5cae8
There seems to be a race somewhere in sxmo_demons that can cause it to spawn multiple copies of a task. This patch does the equivalent of using sxmo_uniq_exec, but it doesn't require changing all the calls to sxmo_daemons. Signed-off-by: Willow Barraco <contact@willowbarraco.fr>
130 lines
1.8 KiB
Bash
Executable File
130 lines
1.8 KiB
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: AGPL-3.0-only
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# Copyright 2022 Sxmo Contributors
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# include common definitions
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# shellcheck source=scripts/core/sxmo_common.sh
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. sxmo_common.sh
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ROOT="$XDG_RUNTIME_DIR/sxmo_daemons"
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mkdir -p "$ROOT"
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exec 3<> "$ROOT/daemons.lock"
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flock -x 3
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list() {
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find "$ROOT" -mindepth 1 -exec 'basename' '{}' ';'
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}
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stop() {
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while [ "$#" -gt 0 ]; do
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case "$1" in
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-f)
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force=1
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shift
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;;
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*)
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id="$1"
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shift
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break
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;;
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esac
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done
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case "$id" in
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all)
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list | while read -r sub_id; do
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stop "$sub_id"
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done
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;;
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*)
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if [ -f "$ROOT/$id" ]; then
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sxmo_debug "stop $id"
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xargs kill ${force:+-9} < "$ROOT"/"$id" 2> /dev/null
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rm "$ROOT"/"$id"
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fi
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;;
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esac
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}
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signal() {
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id="$1"
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shift
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if [ -f "$ROOT/$id" ]; then
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sxmo_debug "signal $id $*"
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xargs kill "$@" < "$ROOT"/"$id" 2> /dev/null
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fi
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}
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start() {
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while [ "$#" -gt 0 ]; do
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case "$1" in
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--no-restart)
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no_restart=1
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shift
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;;
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*)
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id="$1"
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shift
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break
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;;
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esac
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done
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if [ -f "$ROOT/$id" ]; then
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if [ -n "$no_restart" ]; then
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sxmo_debug "$id already running"
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exit 1
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else
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stop "$id"
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fi
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fi
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sxmo_debug "start $id"
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(
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# We need a subshell so we can close the lock fd, without
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# releasing the lock
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exec 3<&-
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"$@" &
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printf "%s\n" "$!" > "$ROOT"/"$id"
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)
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}
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running() {
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while [ "$#" -gt 0 ]; do
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case "$1" in
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-q)
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quiet=1
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shift
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;;
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*)
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id="$1"
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shift
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;;
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esac
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done
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log() {
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if [ -z "$quiet" ]; then
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# shellcheck disable=SC2059
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printf "$@"
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fi
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}
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if [ -f "$ROOT/$id" ]; then
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pid="$(cat "$ROOT/$id")"
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if [ -d "/proc/$pid" ]; then
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log "%s is still running\n" "$id"
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else
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log "%s is not running anymore\n" "$id"
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exit 2
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fi
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else
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log "%s is not running\n" "$id"
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exit 1
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fi
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}
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"$@"
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