logger(1)logger(1)NAMElogger - Makes entries in the system log
SYNOPSIS
/usr/bin/logger [-f file] [-i] [-p[facility.]priority] [-t tag] [mes‐
sage...]
logger [-b] [message...]
STANDARDS
Interfaces documented on this reference page conform to industry stan‐
dards as follows:
logger: XCU5.0
Refer to the standards(5) reference page for more information about
industry standards and associated tags.
OPTIONS
[Tru64 UNIX] Logs the informational message to the binary event logger
instead of the syslog() subroutine and enters information in the binary
event log file. The uerf command with the -r 250 option reports the
informational messages that are in the binary event log file, which is
used for system maintenance and troubleshooting. The -b option cannot
be used with any other options. [Tru64 UNIX] Logs all lines in file.
[Tru64 UNIX] Logs the process ID (PID) of the logger process with each
line. [Tru64 UNIX] Enters the message with the specified priority
and, if specified, from the specified facility.
[Tru64 UNIX] You can specify priority as either an alphabetic
string or its integer equivalent. You can specify the following
values for the priority variable: [Tru64 UNIX] (0) [Tru64
UNIX] The system is unusable. (0) [Tru64 UNIX] Action must be
taken immediately. (1) [Tru64 UNIX] Critical conditions. (2)
[Tru64 UNIX] Error conditions. (3) [Tru64 UNIX] (3) [Tru64
UNIX] (4) [Tru64 UNIX] Warning conditions. (4) [Tru64
UNIX] Normal but significant condition. (5) [Tru64
UNIX] Informational. (6) [Tru64 UNIX] Debug-level messages.
(7)
[Tru64 UNIX] You can also specify a value for the facility
variable, which indicates the source of the event. You can
specify facility as either an alphabetic string or its integer
equivalent. The integer values appear in parentheses. You can
specify the following values for the facility variable: [Tru64
UNIX] Kernel messages. (0) [Tru64 UNIX] Random user-level mes‐
sages. (8) [Tru64 UNIX] Mail system. (16) [Tru64 UNIX] System
daemons. (24) [Tru64 UNIX] Security/authorization messages.
(32) [Tru64 UNIX] (32) [Tru64 UNIX] Messages syslogd generates
internally. (40) [Tru64 UNIX] Line printer subsystem. (48)
[Tru64 UNIX] Network news subsystem. (56) [Tru64 UNIX] UUCP
subsystem. (64) [Tru64 UNIX] Clock daemon. (72) [Tru64
UNIX] (128) [Tru64 UNIX] (136) [Tru64 UNIX] (144) [Tru64
UNIX] (152) [Tru64 UNIX] (160) [Tru64 UNIX] (168) [Tru64
UNIX] (176) [Tru64 UNIX] (184) [Tru64 UNIX] Precedes each
entry in the log with tag.
OPERANDS
You can specify the message to be used for entries on the command line
or with the -f file option, which specifies that each line in file be
logged as an entry. If you do not specify message or -f, logger reads
standard input.
DESCRIPTION
The logger command makes the specified entries in the system log file.
The logger command provides a program and shell script interface to the
syslog() subroutine. The file in which entries are made depends on the
current system log configuration; see syslog and syslogd for more
information.
NOTES
The effects of the environment variable LC_MESSAGES apply only to diag‐
nostic messages generated by logger, and not to any messages written by
the use of the command.
EXIT STATUS
The following exit values are returned: Successful completion. An
error occurred.
EXAMPLES
To log the system reboot, including the process ID of the process run‐
ning logger, enter: logger-i System rebooted To log each line in the
file build.events with the tag trial build preceding them, enter: log‐
ger -f build.events -t "trial build" The following commands are equiva‐
lent and enter events of warning priority to the log: logger-p warning
logger-p 4 The following commands are equivalent and enter events from
the daemon facility of warning priority: logger-p daemon.warning
logger-p 24.4 To specify the debug priority with a priority name,
enter: logger-p debug my message
To specify the debug priority with a priority number, enter:
logger-p 7 my message To specify both debug priority and the
user facility, enter: logger-p user.debug my message
To specify the same facility/priority pair using numeric values,
enter: logger-p 8.7 my message
You can also combine alphabetic and numeric specifications: log‐
ger -p user.7 my message logger-p 8.debug my message
ENVIRONMENT VARIABLES
The following environment variables affect the execution of logger:
Provides a default value for the internationalization variables that
are unset or null. If LANG is unset or null, the corresponding value
from the default locale is used. If any of the internationalization
variables contain an invalid setting, the utility behaves as if none of
the variables had been defined. If set to a non-empty string value,
overrides the values of all the other internationalization variables.
Determines the locale for the interpretation of sequences of bytes of
text data as characters (for example, single-byte as opposed to multi-
byte characters in arguments). Determines the locale for the format
and contents of diagnostic messages written to standard error. Deter‐
mines the location of message catalogues for the processing of LC_MES‐
SAGES.
SEE ALSO
Commands: binlogd(8), syslogd(8), uerf(8)
Functions: syslog(3)
Standards: standards(5)logger(1)