postlock(1) - NetBSD Manual Pages

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POSTLOCK(1)                                                        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: -c config_dir Read the configuration file in the named directory instead of the default configuration directory. -l lock_style Override the locking method specified via the mailbox_deliv- ery_lock configuration parameter (see below). -v Enable verbose logging for debugging purposes. Multiple -v options make the software 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 inter- pretation by a shell command interpreter.
The result status is 75 (EX_TEMPFAIL) when postlock(1) could not per- form 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 neces- sarily eliminate access conflicts. Avoid file access by processes run- ning on different machines.
MAIL_CONFIG Directory with Postfix configuration files. MAIL_VERBOSE Enable verbose logging for debugging purposes.
The following parameters are especially relevant to this pro- gram. The text below provides only a parameter summary. See post- conf(5) for more details including examples.
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.
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.
config_directory (see 'postconf -d' output) The default location of the Postfix and con- figuration files. import_environment (see 'postconf -d' output) 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 POSTLOCK(1)
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