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NetBSD 6.1.5 - man page for postlock (netbsd section 1)

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POSTLOCK(1)									      POSTLOCK(1)

NAME
       postlock - lock mail folder and execute command

SYNOPSIS
       postlock [-c config_dir] [-l lock_style]
	       [-v] file command...

DESCRIPTION
       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:

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

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

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

       Arguments:

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

       command...
	      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.

DIAGNOSTICS
       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.

BUGS
       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.

ENVIRONMENT
       MAIL_CONFIG
	      Directory with Postfix configuration files.

       MAIL_VERBOSE
	      Enable verbose logging for debugging purposes.

CONFIGURATION PARAMETERS
       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.

LOCKING CONTROLS
       deliver_lock_attempts (20)
	      The  maximal  number  of attempts to acquire an exclusive lock on a mailbox file or
	      bounce(8) logfile.

       deliver_lock_delay (1s)
	      The time between attempts to acquire  an	exclusive  lock  on  a	mailbox  file  or
	      bounce(8) logfile.

       stale_lock_time (500s)
	      The time after which a stale exclusive mailbox lockfile is removed.

       mailbox_delivery_lock (see 'postconf -d' output)
	      How to lock a UNIX-style local(8) mailbox before attempting delivery.

RESOURCE AND RATE CONTROLS
       fork_attempts (5)
	      The maximal number of attempts to fork() a child process.

       fork_delay (1s)
	      The delay between attempts to fork() a child process.

MISCELLANEOUS CONTROLS
       config_directory (see 'postconf -d' output)
	      The default location of the Postfix main.cf and master.cf configuration files.

SEE ALSO
       postconf(5), configuration parameters

LICENSE
       The Secure Mailer license must be distributed with this software.

AUTHOR(S)
       Wietse Venema
       IBM T.J. Watson Research
       P.O. Box 704
       Yorktown Heights, NY 10598, USA

										      POSTLOCK(1)
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