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home | helpx minix x x minixx POSTLOCK(1) General Commands Manual 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 in- stead 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 op- tions 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 ac- cess. The command is executed directly, i.e. without interpre- tation by a shell command interpreter. DIAGNOSTICS 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. BUGS 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. 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 pro- gram. The text below provides only a parameter summary. See post- conf(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 re- moved. mailbox_delivery_lock (see 'postconf -d' output) How to lock a UNIX-style local(8) mailbox before attempting de- livery. 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 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. 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 Wietse Venema Google, Inc. 111 8th Avenue New York, NY 10011, USA POSTLOCK(1)
NAME | SYNOPSIS | DESCRIPTION | DIAGNOSTICS | BUGS | ENVIRONMENT | CONFIGURATION PARAMETERS | LOCKING CONTROLS | RESOURCE AND RATE CONTROLS | MISCELLANEOUS CONTROLS | SEE ALSO | LICENSE | AUTHOR(S)