NAME
postlock
-
lock mail folder and execute command
SYNOPSIS
ppoossttlloocckk [--cc _c_o_n_f_i_g___d_i_r]] [[--ll _l_o_c_k___s_t_y_l_e]]
[[--vv] _f_i_l_e _c_o_m_m_a_n_d_._._.
DESCRIPTION
The ppoossttlloocckk(1) command locks _f_i_l_e for exclusive
access, and executes _c_o_m_m_a_n_d. The locking method is
compatible with the Postfix UNIX-style local delivery agent.
Options:
-
--cc _c_o_n_f_i_g___d_i_r
Read the mmaaiinn..ccff configuration file in the named directory
-
instead of the default configuration directory.
-
--ll _l_o_c_k___s_t_y_l_e
Override the locking method specified via the
-
mmaaiillbbooxx__ddeelliivveerryy__lloocckk configuration parameter (see below).
-
--vv
Enable verbose logging for debugging purposes. Multiple --vv
-
options make the software increasingly verbose.
Arguments:
-
_f_i_l_e
A mailbox file. The user should have read/write permission.
-
-
_c_o_m_m_a_n_d_._._.
The command to execute while _f_i_l_e 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 ppoossttlloocckk(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
-
MMAAIILL__CCOONNFFIIGG
Directory with Postfix configuration files.
-
-
MMAAIILL__VVEERRBBOOSSEE
Enable verbose logging for debugging purposes.
-
CONFIGURATION PARAMETERS
The following mmaaiinn..ccff parameters are especially relevant to
this program.
The text below provides only a parameter summary. See
ppoossttccoonnff(5) for more details including examples.
LOCKING CONTROLS
-
ddeelliivveerr__lloocckk__aatttteemmppttss ((2200))
The maximal number of attempts to acquire an exclusive lock on a
-
mailbox file or bboouunnccee(8) logfile.
-
ddeelliivveerr__lloocckk__ddeellaayy ((11ss))
The time between attempts to acquire an exclusive lock on a mailbox
-
file or bboouunnccee(8) logfile.
-
ssttaallee__lloocckk__ttiimmee ((550000ss))
The time after which a stale exclusive mailbox lockfile is removed.
-
-
mmaaiillbbooxx__ddeelliivveerryy__lloocckk ((sseeee ''ppoossttccoonnff --dd'' oouuttppuutt))
How to lock a UNIX-style llooccaall(8) mailbox before attempting delivery.
-
RESOURCE AND RATE CONTROLS
-
ffoorrkk__aatttteemmppttss ((55))
The maximal number of attempts to fork() a child process.
-
-
ffoorrkk__ddeellaayy ((11ss))
The delay between attempts to fork() a child process.
-
MISCELLANEOUS CONTROLS
-
ccoonnffiigg__ddiirreeccttoorryy ((sseeee ''ppoossttccoonnff --dd'' oouuttppuutt))
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