POSTLOCK(1) General Commands Manual POSTLOCK(1)

postlock - lock mail folder and execute command



postlock [-c config_dir] [-l
    lock_style]
  

   [-v] file command...








The postlock(1) command locks file for exclusive
    access, and executes command. The locking method is compatible with
    the Postfix UNIX-style local delivery agent.


Options:



  

  
Read the main.cf configuration file in the named directory instead
      of the default configuration directory.

  

  
Override the locking method specified via the mailbox_delivery_lock
      configuration parameter (see below).

  

  
Enable verbose logging for debugging purposes. Multiple -v options
      make the software increasingly verbose.




Arguments:



  

  
A mailbox file. The user should have read/write permission.

  

  
The command to execute while file is locked for exclusive access.
      The command is executed directly, i.e. without interpretation by a shell
      command interpreter.










The result status is 75 (EX_TEMPFAIL) when postlock(1)
    could not perform the requested operation. Otherwise, the exit status is the
    exit status from the command.








With remote file systems, the ability to acquire a lock does not
    necessarily eliminate access conflicts. Avoid file access by processes
    running on different machines.











  

  
Directory with Postfix configuration files.

  

  
Enable verbose logging for debugging purposes.












The following main.cf parameters are especially relevant to
    this program. The text below provides only a parameter summary. See
    postconf(5) for more details including examples.











  

  
The maximal number of attempts to acquire an exclusive lock on a mailbox
      file or bounce(8) logfile.

  

  
The time between attempts to acquire an exclusive lock on a mailbox file
      or bounce(8) logfile.

  

  
The time after which a stale exclusive mailbox lockfile is removed.

  

  
How to lock a UNIX-style local(8) mailbox before attempting
      delivery.













  

  
The maximal number of attempts to fork() a child process.

  

  
The delay between attempts to fork() a child process.













  

  
The default location of the Postfix main.cf and master.cf configuration
      files.

  

  
The list of environment parameters that a privileged Postfix process will
      import from a non-Postfix parent process, or name=value environment
      overrides.










postconf(5), configuration parameters










The Secure Mailer license must be distributed with this
  software.








Wietse Venema
IBM T.J. Watson Research
P.O. Box 704
Yorktown Heights, NY 10598, USA
Wietse Venema
Google, Inc.
111 8th Avenue
New York, NY 10011, USA