postlog - Postfix-compatible logging utility
postlog [-iv] [-c config_dir] [-p
priority] [-t tag] [text...]
The postlog(1) command implements a Postfix-compatible logging interface
for use in, for example, shell scripts.
By default, postlog(1) logs the text given on the
command line as one record. If no text is specified on the command
line, postlog(1) reads from standard input and logs each input line
as one record.
By default, logging is sent to syslogd(8) or
postlogd(8); when the standard error stream is connected to a
terminal, logging is sent there as well.
The following options are implemented:
- -c config_dir
- Read the main.cf configuration file in the named directory instead
of the default configuration directory.
- -i (obsolete)
- Include the process ID in the logging tag. This flag is ignored as of
Postfix 3.4, where the PID is always included.
- -p priority (default: info)
- Specifies the logging severity: info, warn, error,
fatal, or panic. With Postfix 3.1 and later, the program
will pause for 1 second after reporting a fatal or panic
condition, just like other Postfix programs.
- -t tag
- Specifies the logging tag, that is, the identifying name that appears at
the beginning of each logging record. A default tag is used when none is
specified.
- -v
- Enable verbose logging for debugging purposes. Multiple -v options
make the software increasingly verbose.
The postlog(1) command is designed to run with set-groupid privileges, so
that it can connect to the postlogd(8) daemon process (Postfix 3.7 and
later; earlier implementations of this command must not have set-groupid or
set-userid permissions).
- MAIL_CONFIG
- Directory with the main.cf file.
The following main.cf parameters are especially relevant to this program.
The text below provides only a parameter summary. See
postconf(5) for more details including examples.
- config_directory (see 'postconf -d' output)
- The default location of the Postfix main.cf and master.cf configuration
files.
- import_environment (see 'postconf -d' output)
- The list of environment variables that a privileged Postfix process will
import from a non-Postfix parent process, or name=value environment
overrides.
- syslog_facility (mail)
- The syslog facility of Postfix logging.
- syslog_name (see 'postconf -d' output)
- A prefix that is prepended to the process name in syslog records, so that,
for example, "smtpd" becomes "prefix/smtpd".
Available in Postfix 3.4 and later:
- maillog_file (empty)
- The name of an optional logfile that is written by the Postfix
postlogd(8) service.
- postlog_service_name (postlog)
- The name of the postlogd(8) service entry in master.cf.
postconf(5), configuration parameters
postlogd(8), Postfix logging
syslogd(8), system logging
The Secure Mailer license must be distributed with this software.
The postlog(1) command was introduced with Postfix version 3.4.
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