[Bug 1246245] Re: proftpd service failed to restart

[joelparkerhenderson]

Thanks Merlijn, your patch works. IMHO your patch is a good way to
really fix the race condition.

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https://bugs.launchpad.net/bugs/1246245

Title:
  proftpd service failed to restart

Status in “proftpd-dfsg” package in Ubuntu:
  Confirmed

Bug description:
  proftpd-basic 1.3.5~rc3-2 from Ubuntu 13.10

  Init script from proftpd-basic package contains the BUG: when you run
  /etc/init.d/proftpd restart it fails because of there is the race
  between pidfile removal and start() which checks pidfile existency:

  ---
  ProFTPD is started in standalone mode, currently running.
  root at aa:~# /etc/init.d/proftpd restart
   * Stopping ftp server proftpd                                                                                                                                                                             [ OK ] 
   * Starting ftp server proftpd                                                                                                                                                                             [ OK ] 
  root at aa:~# /etc/init.d/proftpd status
  ProFTPD is started in standalone mode, currently not running.
  ---

  the next workaround helps:

  ---
  --- /etc/init.d/proftpd.orig    2013-10-30 13:52:46.791265726 +0400
  +++ /etc/init.d/proftpd 2013-10-30 13:52:57.456265698 +0400
  @@ -107,6 +107,7 @@
       fi
       if [ -f "$PIDFILE" ]; then
          start-stop-daemon --stop --signal $SIGNAL --quiet --pidfile "$PIDFILE"
  +       sleep 1
           if [ $? = 0 ]; then
                  log_end_msg 0
          else
  ---

  Please, fix.

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