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RedHat 9 (Linux i386) - man page for master (redhat section 8)

MASTER(8)			     System Manager's Manual				MASTER(8)

NAME
       master - Postfix master process

SYNOPSIS
       master [-c config_dir] [-e exit_time] [-D] [-t] [-v]

DESCRIPTION
       The  master daemon is the resident process that runs Postfix daemons on demand: daemons to
       send or receive messages via the network, daemons to deliver  mail  locally,  etc.   These
       daemons are created on demand up to a configurable maximum number per service.

       Postfix	daemons  terminate voluntarily, either after being idle for a configurable amount
       of time, or after having serviced a configurable number of requests. The exception to this
       rule is the resident Postfix queue manager.

       The  behavior  of the master daemon is controlled by the master.cf configuration file. The
       table specifies zero or more servers in the UNIX or INET  domain,  or  servers  that  take
       requests  from  a FIFO. Precise configuration details are given in the master.cf file, and
       in the manual pages of the respective daemons.

       Options:

       -c config_dir
	      Read the main.cf and master.cf configuration files in the named  directory  instead
	      of the default configuration directory.

       -e exit_time
	      Terminate  the master process after exit_time seconds. Child processes terminate at
	      their convenience.

       -D     After initialization, run a debugger on the master process. The  debugging  command
	      is specified with the debugger_command in the main.cf global configuration file.

       -t     Test  mode.  Return a zero exit status when the master.pid lock file does not exist
	      or when that file is not locked.	This is evidence that the master  daemon  is  not
	      running.

       -v     Enable  verbose  logging	for debugging purposes. This option is passed on to child
	      processes. Multiple -v options make the software increasingly verbose.

       Signals:

       SIGHUP Upon receipt of a HUP signal (e.g., after postfix reload), the master  process  re-
	      reads  its  configuration  files.  If a service has been removed from the master.cf
	      file, its running processes are terminated immediately.	Otherwise,  running  pro-
	      cesses  are  allowed to terminate as soon as is convenient, so that changes in con-
	      figuration settings affect only new service requests.

       SIGTERM
	      Upon receipt of a TERM signal (e.g.,  after  postfix  abort),  the  master  process
	      passes  the signal on to its child processes and terminates.  This is useful for an
	      emergency shutdown. Normally one would terminate only the master (postfix stop) and
	      allow running processes to finish what they are doing.

DIAGNOSTICS
       Problems are reported to syslogd(8).

BUGS
ENVIRONMENT
       MAIL_DEBUG
	      After  initialization, start a debugger as specified with the debugger_command con-
	      figuration parameter in the main.cf configuration file.

       MAIL_CONFIG
	      Directory with Postfix configuration files.

CONFIGURATION PARAMETERS
       The following main.cf parameters are especially relevant to this program. See the  Postfix
       main.cf	file  for  syntax  details and for default values. Use the postfix reload command
       after a configuration change.

Miscellaneous
       import_environment

       export_environment
	      Lists of names of environment parameters that can be imported  from  (exported  to)
	      non-Postfix processes.

       mail_owner
	      The owner of the mail queue and of most Postfix processes.

       command_directory
	      Directory with Postfix support programs.

       daemon_directory
	      Directory with Postfix daemon programs.

       queue_directory
	      Top-level  directory of the Postfix queue. This is also the root directory of Post-
	      fix daemons that run chrooted.

Resource controls
       default_process_limit
	      Default limit for the number of simultaneous child processes that provide  a  given
	      service.

       max_idle
	      Limit the time in seconds that a child process waits between service requests.

       max_use
	      Limit the number of service requests handled by a child process.

       service_throttle_time
	      Time to avoid forking a server that appears to be broken.

FILES
       /etc/postfix/main.cf: global configuration file.
       /etc/postfix/master.cf: master process configuration file.
       /var/spool/postfix/pid/master.pid: master lock file.

SEE ALSO
       qmgr(8) queue manager
       pickup(8) local mail pickup
       syslogd(8) system logging

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

											MASTER(8)


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