106 lines
3.8 KiB
HTML
106 lines
3.8 KiB
HTML
<html> <head> </head> <body> <pre>
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POSTLOCK(1) POSTLOCK(1)
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<b>NAME</b>
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postlock - lock mail folder and execute command
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<b>SYNOPSIS</b>
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<b>postlock</b> [<b>-c</b> <i>config_dir</i><b>]</b> <b>[-l</b> <i>lock_style</i><b>]</b> <b>[-v</b>] <i>file</i> <i>com-</i>
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<i>mand...</i>
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<b>DESCRIPTION</b>
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The <b>postlock</b> command locks <i>file</i> for exclusive access, and
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executes <i>command</i>. The locking method is compatible with
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the Postfix UNIX-style local delivery agent.
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Options:
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<b>-c</b> <i>config_dir</i>
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Read the <b>main.cf</b> configuration file in the named
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directory instead of the default configuration
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directory.
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<b>-l</b> <i>lock_style</i>
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Override the locking method specified via the <b>mail-</b>
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<b>box</b><i>_</i><b>delivery</b><i>_</i><b>lock</b> configuration parameter (see
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below).
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<b>-v</b> Enable verbose logging for debugging purposes. Mul-
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tiple <b>-v</b> options make the software increasingly
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verbose.
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Arguments:
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<i>file</i> A mailbox file. The user should have read/write
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permission.
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<i>command...</i>
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The command to execute while <i>file</i> is locked for
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exclusive access. The command is executed
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directly, i.e. without interpretation by a shell
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command interpreter.
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<b>DIAGNOSTICS</b>
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The result status is 75 (EX_TEMPFAIL) when <b>postlock</b> could
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not perform the requested operation. Otherwise, the exit
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status is the exit status from the command.
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<b>BUGS</b>
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With remote file systems, the ability to acquire a lock
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does not necessarily eliminate access conflicts. Avoid
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file access by processes running on different machines.
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<b>ENVIRONMENT</b>
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<b>MAIL</b><i>_</i><b>CONFIG</b>
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Directory with Postfix configuration files.
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<b>MAIL</b><i>_</i><b>VERBOSE</b>
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Enable verbose logging for debugging purposes.
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<b>CONFIGURATION</b> <b>PARAMETERS</b>
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The following <b>main.cf</b> parameters are especially relevant
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to this program. See the Postfix <b>main.cf</b> file for syntax
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details and for default values.
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<b>Locking</b> <b>controls</b>
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<b>deliver</b><i>_</i><b>lock</b><i>_</i><b>attempts</b>
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Limit the number of attempts to acquire an exclu-
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sive lock.
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<b>deliver</b><i>_</i><b>lock</b><i>_</i><b>delay</b>
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Time in seconds between successive attempts to
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acquire an exclusive lock.
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<b>stale</b><i>_</i><b>lock</b><i>_</i><b>time</b>
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Limit the time after which a stale lock is removed.
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<b>mailbox</b><i>_</i><b>delivery</b><i>_</i><b>lock</b>
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What file locking method(s) to use when delivering
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to a UNIX-style mailbox. The default setting is
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system dependent. For a list of available file
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locking methods, use the <b>postconf</b> <b>-l</b> command.
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<b>Resource</b> <b>controls</b>
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<b>fork</b><i>_</i><b>attempts</b>
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Number of attempts to <b>fork</b>() a process before giv-
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ing up.
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<b>fork</b><i>_</i><b>delay</b>
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Delay in seconds between successive <b>fork</b>()
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attempts.
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<b>LICENSE</b>
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The Secure Mailer license must be distributed with this
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software.
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<b>AUTHOR(S)</b>
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Wietse Venema
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IBM T.J. Watson Research
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P.O. Box 704
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Yorktown Heights, NY 10598, USA
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1
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</pre> </body> </html>
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