+#
+# service: simple wrapper around start-stop-daemon
+#
+# Usage: service ACTION EXEC ARGS...
+#
+# Action:
+# -C check if EXEC is alive
+# -S start EXEC, passing it ARGS as its arguments
+# -K kill EXEC, sending it a TERM signal if not specified otherwise
+#
+# Environment variables exposed:
+# SERVICE_DAEMONIZE run EXEC in background
+# SERVICE_WRITE_PID create a pid-file and use it for matching
+# SERVICE_MATCH_EXEC use EXEC command-line for matching (default)
+# SERVICE_MATCH_NAME use EXEC process name for matching
+# SERVICE_USE_PID assume EXEC create its own pid-file and use it for matching
+# SERVICE_NAME process name to use (default to EXEC file part)
+# SERVICE_PID_FILE pid file to use (default to /var/run/$SERVICE_NAME.pid)
+# SERVICE_SIG signal to send when using -K
+# SERVICE_SIG_RELOAD default signal used when reloading
+# SERVICE_SIG_STOP default signal used when stopping
+# SERVICE_STOP_TIME time to wait for a process to stop gracefully before killing it
+# SERVICE_UID user EXEC should be run as
+# SERVICE_GID group EXEC should be run as
+#
+# SERVICE_DEBUG don't do anything, but show what would be done
+# SERVICE_QUIET don't print anything
+#
+
+SERVICE_QUIET=1
+SERVICE_SIG_RELOAD="HUP"
+SERVICE_SIG_STOP="TERM"
+SERVICE_STOP_TIME=5
+SERVICE_MATCH_EXEC=1
+
+service() {
+ local ssd
+ local exec
+ local name
+ local start
+ ssd="${SERVICE_DEBUG:+echo }start-stop-daemon${SERVICE_QUIET:+ -q}"
+ case "$1" in
+ -C)
+ ssd="$ssd -K -t"
+ ;;
+ -S)
+ ssd="$ssd -S${SERVICE_DAEMONIZE:+ -b}${SERVICE_WRITE_PID:+ -m}"
+ start=1
+ ;;
+ -K)
+ ssd="$ssd -K${SERVICE_SIG:+ -s $SERVICE_SIG}"
+ ;;
+ *)
+ echo "service: unknown ACTION '$1'" 1>&2
+ return 1
+ esac
+ shift
+ exec="$1"
+ [ -n "$exec" ] || {
+ echo "service: missing argument" 1>&2
+ return 1
+ }
+ [ -x "$exec" ] || {
+ echo "service: file '$exec' is not executable" 1>&2
+ return 1
+ }
+ name="${SERVICE_NAME:-${exec##*/}}"
+ [ -z "$SERVICE_USE_PID$SERVICE_WRITE_PID$SERVICE_PID_FILE" ] \
+ || ssd="$ssd -p ${SERVICE_PID_FILE:-/var/run/$name.pid}"
+ [ -z "$SERVICE_MATCH_NAME" ] || ssd="$ssd -n $name"
+ ssd="$ssd${SERVICE_UID:+ -c $SERVICE_UID${SERVICE_GID:+:$SERVICE_GID}}"
+ [ -z "$SERVICE_MATCH_EXEC$start" ] || ssd="$ssd -x $exec"
+ shift
+ $ssd${1:+ -- "$@"}
+}
+
+service_check() {
+ service -C "$@"
+}
+
+service_signal() {
+ SERVICE_SIG="${SERVICE_SIG:-USR1}" service -K "$@"
+}
+
+service_start() {
+ service -S "$@"
+}
+
+service_stop() {
+ local try
+ SERVICE_SIG="${SERVICE_SIG:-$SERVICE_SIG_STOP}" service -K "$@" || return 1
+ while [ $((try++)) -lt $SERVICE_STOP_TIME ]; do
+ service -C "$@" || return 0
+ sleep 1
+ done
+ SERVICE_SIG="KILL" service -K "$@"
+ sleep 1
+ ! service -C "$@"
+}
+
+service_reload() {
+ SERVICE_SIG="${SERVICE_SIG:-$SERVICE_SIG_RELOAD}" service -K "$@"
+}
+
projects / openwrt.git / blobdiff