Added new rc.<service> scripts - various.

rc.d/rc.bwbar

@@ -0,0 +1,124 @@
+#!/bin/bash
+# Version: 0.3.0-bwbar
+# Copyright (c) 2005-2022:
+#   Darren 'Tadgy' Austin <darren (at) afterdark.org.uk>
+# Licensed under the terms of the GNU General Public License version 3.
+
+BWBAR_EXEC="/opt/bin/bwbar"
+DAEMON_EXEC="/usr/bin/daemon"
+BWBAR_ARGS=('-f' '/run/bwbar.txt' '-p' '/run/bwbar.png' '-t' '5' '-x' '800' '-y' '8' '-b' '2' '${MONINTERFACE:-eth0}' '$(( ($(ip link show "${MONINTERFACE:-eth0}" | sed -nre "s/.*qlen (.*)$/\1/ p") / 100) * 90 ))')
+DAEMON_ARGS=('-N' '-n' "${0##*rc.}" '-r' '-a' '60' '-A' '5' '-L' '3600' '-M' '3' '-o daemon.debug' '--')
+RUNUSER="$(whoami)"
+MONINTERFACE="eth0"
+
+# Allow configuration in /etc/default to override.
+# Additional available variables:
+#   ENVIRONMENT=()	# Extra environment passed to $EXEC.  Must be an array.
+#   SLAY_DELAY=""	# Delay between the SIGTERM and SIGKILL on a 'stop'.  Default: 2s.
+#   RESTART_DELAY=""	# Delay between stopping and starting on a 'restart'.  Default: 2s.
+#   RUNUSER=""		# Username to run the daemon as.  Default: User who starts the script.
+#   MONINTERFACE=""	# The interface to monitor for bandwidth usage.  Default: eth0.
+[[ -e "/etc/default/${0##*rc.}" ]] && source "/etc/default/${0##*rc.}"
+
+error() {
+  printf "%s: %s: %s\\n" "${BASH_SOURCE##*/}" "${BWBAR_EXEC##*/}" "$*" >&2
+}
+
+checkconfigured() {
+  # This function can be used to perform any pre-start tests; hopfully to insure the daemon
+  # can start correctly, before actually trying to start it.  A return value of 0 means the
+  # tests were passed and the daemon should be started.  Any other value prevents the
+  # daemon from being started, and an error message will be emitted.
+  id "${RUNUSER:-$(whoami)}" >/dev/null 2>&1 || return 1
+  ip link show "${MONINTERFACE:-eth0}" >/dev/null 2>&1 || return 1
+  return 0
+}
+
+checkstatus() {
+  local RET
+  if su - "${RUNUSER:-$(whoami)}" -c "\"$DAEMON_EXEC\" --running -n \"${0##*rc.}\""; then
+    printf "%s: %s: %s\\n" "${BASH_SOURCE##*/}" "${BWBAR_EXEC##*/}" "running"
+    RET=0
+  else
+    printf "%s: %s: %s\\n" "${BASH_SOURCE##*/}" "${BWBAR_EXEC##*/}" "running"
+    RET=1
+  fi
+  return $RET
+}
+
+startdaemon() {
+  checkconfigured || {
+    error "not started - pre-start checks failed"
+    return 1
+  }
+  su - "${RUNUSER:-$(whoami)}" -c "${ENVIRONMENT:+declare ${ENVIRONMENT[*]};} \"$DAEMON_EXEC\" ${DAEMON_ARGS[*]} \"$BWBAR_EXEC\" ${BWBAR_ARGS[*]}"
+  if (( $? != 0 )); then
+    error "error starting daemon"
+    return 1
+  else
+    return 0
+  fi
+}
+
+stopdaemon() {
+  su - "${RUNUSER:-$(whoami)}" -c "\"$DAEMON_EXEC\" -n \"${0##*rc.}\" --stop 2>/dev/null"
+  sleep "${SLAY_DELAY:-2}"
+  checkstatus >/dev/null && {
+    error "failed to stop gracefully - slaying"
+    su - "${RUNUSER:-$(whoami)}" -c "\"$DAEMON_EXEC\" -n \"${0##*rc.}\" --signal=kill 2>/dev/null"
+  }
+  return 0
+}
+
+for EXEC in "$BWBAR_EXEC" "$DAEMON_EXEC"; do
+  [[ ! -e "$EXEC" ]] && {
+    error "$EXEC:" "not found"
+    return 1 2>/dev/null || exit 1
+  }
+  [[ ! -x "$EXEC" ]] && {
+    error "$EXEC:" "not executable"
+    return 1 2>/dev/null || exit 1
+  }
+done
+
+case "$1" in
+  'start')
+    if checkstatus >/dev/null; then
+      error "already running"
+      printf "  %s\\n" "Try: $BASH_SOURCE status" >&2
+      RET=1
+    else
+      startdaemon
+      RET=$?
+    fi
+    ;;
+  'stop')
+    if ! checkstatus >/dev/null; then
+      error "not running"
+      printf "  %s\\n" "Try: $BASH_SOURCE status" >&2
+      RET=1
+    else
+      stopdaemon
+      RET=$?
+    fi
+    ;;
+  'restart')
+    if checkstatus >/dev/null; then
+      stopdaemon && sleep "${RESTART_DELAY:-2}" && startdaemon
+      RET=$?
+    else
+      startdaemon
+      RET=$?
+    fi
+    ;;
+  'status')
+    checkstatus
+    RET=$?
+    ;;
+  *)
+    printf "%s\\n" "Usage: $BASH_SOURCE <start|stop|restart|status>" >&2
+    RET=1
+    ;;
+esac
+
+return $RET 2>/dev/null || exit $RET