awesome-restart

#!/bin/sh

# Restart awesome by signalling the session runner to restart it.
# This loads a new binary.
# The session runner is ./usr/bin/session-run-awesome.sh.

awesome_pid=
for p in $(pgrep -x awesome); do
  if grep -q "^DISPLAY=$DISPLAY$" "/proc/$p/environ"; then
    echo "Found pid $p for DISPLAY=$DISPLAY."
    if [ -n "$awesome_pid" ]; then
      echo "ERROR: found multiple pids!? ($awesome_pid, $p) - aborting." >&2
      exit 1
    fi
    awesome_pid=$p
  fi
done
[ -z "$awesome_pid" ] && {
  echo "No awesome found for DISPLAY=$DISPLAY." >&2
  exit 1
}

session_pid=$(ps -o ppid= "$awesome_pid")
[ -z "$session_pid" ] && {
  echo "No session PID found for pid $awesome_pid (DISPLAY=$DISPLAY)." >&2
  exit 1
}

# echo "Signalling session (USR1), pid=${session_pid}."
kill -USR1 "$session_pid"

# Write args to a file that is read by ~/.dotfiles/usr/bin/session-run-awesome.sh.
# This allows to use another config temporarily, e.g.:
#   awesome-restart -c ~/src/awesome/awesomerc.lua
args_file="/var/run/user/$(id -u)/awesome-restart-args"
echo "$@" > "$args_file"

# echo "Sending TERM to awesome: pid=${awesome_pid}."
kill -TERM "$awesome_pid"
sleep 1
if kill -0 "$awesome_pid" 2>/dev/null; then
  kill -KILL "$awesome_pid"
fi