Python3 http.server start/stop script

pyhttpd-start

#!/usr/bin/env bash
pname="$(basename $0)"

htdocs=/var/www/htdocs
logfile=/var/log/pyhttpd/httpd.log
pidfile=/var/run/pyhttpd.pid
port=8086
httpd="python3 -m http.server --cgi $port"

proc_signature="[0-9]:[0-9][0-9] $httpd"
usage="$pname {start|stop|restart|syncpid}"

start_proc() {
  cd "$htdocs"
  nohup $httpd >"$logfile" 2>&1 &
  get_pid >"$pidfile"
}

start_ifdown_proc() {
  pid=$(get_pid)
  test -n "$pid" && return
  start_proc
}

stop_proc() {
  test -f "$pidfile" || { echo "$pname: $pidfile not exist.">&2; exit 2; }
  kill $(cat "$pidfile") && rm -f "$pidfile"
}

restart_proc() {
  clean_proc
  start_proc
}

clean_proc() {
  test -f "$pidfile" && stop_proc
  while true; do
    pid=$(getpid)
    test -z "$pid" && break
    echo "$pid">"$pidfile"
    stop_proc
  done
}

get_pid() {
  set - $(ps | grep "$proc_signature")
  echo $1
}

sync_pid() {
  test -f "$pidfile" && return
  pid=$(getpid)
  test -n "$pid" && echo "$pid">"$pidfile"
}

case "$1" in
start)
  start_ifdown_proc;;
stop)
  clean_proc;;
restart)
  restart_proc;;
syncpid)
  sync_pid;;
*)
  echo "$usage"; exit;;
esac