NEWSYSLOG.CONF(5) BSD File Formats Manual NEWSYSLOG.CONF(5)
NAME
newsyslog.conf -- newsyslog(8) configuration file
DESCRIPTION
The newsyslog.conf file is used to set log file rotation configuration for the newsyslog(8) utility.
Configuration may designate that logs are rotated based on size, last rotation time, or time of day.
The newsyslog.conf file can also be used to designate secure permissions to log files at rotation time.
During initialization, newsyslog(8) reads a configuration file, normally /etc/newsyslog.conf, to deter-mine determine
mine which logs may potentially be rotated and archived. Each line has five mandatory fields and four
optional fields, separated with whitespace. Blank lines or lines beginning with `#' are ignored. If
`#' is placed in the middle of the line, the `#' character and the rest of the line after it is
ignored. To prevent special meaning, the `#' character may be escaped with `\\'; in this case preced-ing preceding
ing `\\' is removed and `#' is treated as an ordinary character. The fields of the configuration file
are as follows:
logfile_name
Name of the system log file to be archived, or the literal string ``<default>''. The special
default entry will only be used if a log file name is given as a command line argument to
newsyslog(8), and if that log file name is not matched by any other line in the configuration
file.
owner:group
This optional field specifies the owner and group for the archive file. The `:' is essential
regardless if the owner or group field is left blank or contains a value. The field may be
numeric, or a name which is present in /etc/passwd or /etc/group. By default, log files are
owned by root:admin.
mode Specify the file mode of the log file and archives.
count Specify the maximum number of archive files which may exist. This does not consider the cur-rent current
rent log file.
size When the size of the log file reaches size in kilobytes, the log file will be trimmed as
described above. If this field contains an asterisk (`*'), the log file will not be trimmed
based on size.
when The when field may consist of an interval, a specific time, or both. If the when field con-tains contains
tains an asterisk (`*'), log rotation will solely depend on the contents of the size field.
Otherwise, the when field consists of an optional interval in hours, usually followed by an
`@'-sign and a time in restricted ISO 8601 format. Additionally, the format may also be con-structed constructed
structed with a `$' sign along with a rotation time specification of once a day, once a week,
or once a month.
If a time is specified, the log file will only be trimmed if newsyslog(8) is run within one
hour of the specified time. If an interval is specified, the log file will be trimmed if that
many hours have passed since the last rotation. When both a time and an interval are specified
then both conditions must be satisfied for the rotation to take place.
There is no provision for the specification of a timezone. There is little point in specifying
an explicit minutes or seconds component in the current implementation, since the only compari-son comparison
son is ``within the hour''.
ISO 8601 restricted time format:
The lead-in character for a restricted ISO 8601 time is an `@' sign. The particular format of
the time in restricted ISO 8601 is: [[[[[cc]yy]mm]dd][T[hh[mm[ss]]]]]. Optional date fields
default to the appropriate component of the current date; optional time fields default to mid-night; midnight;
night; hence if today is January 22, 1999, the following date specifications are all equiva-lent: equivalent:
lent:
`19990122T000000'
`990122T000000'
`0122T000000'
`22T000000'
`T000000'
`T0000'
`T00'
`22T'
`T'
`'
Day, week, and month time format:
The lead-in character for day, week, and month specification is a `$' sign. The particular
format of day, week, and month specification is: [Dhh], [Ww[Dhh]], and [Mdd[Dhh]], respec-tively. respectively.
tively. Optional time fields default to midnight. The ranges for day and hour specifications
are:
hh hours, range 0..23
w day of week, range 0..6, 0 = Sunday
dd day of month, range 1..31, or one of the letters `L' or `l' to specify the last
day of the month.
Some examples:
$D0 rotate every night at midnight (same as @T00)
$D23 rotate every day at 23:00 (same as @T23)
$W0D23 rotate every week on Sunday at 23:00
$W5D16 rotate every week on Friday at 16:00
$M1D0 rotate at the first day of every month at midnight (i.e., the start of the day;
same as @01T00)
$M5D6 rotate on every 5th day of month at 6:00 (same as @05T06)
flags This optional field is made up of one or more characters that specify any special processing to
be done for the log files matched by this line. The following are valid flags:
B indicates that the log file is a binary file, or has some special format. Usually
newsyslog(8) inserts an ASCII message into a log file during rotation. This message is
used to indicate when, and sometimes why the log file was rotated. If B is specified,
then that informational message will not be inserted into the log file.
C indicates that the log file should be created if it does not already exist, and if the
-C option was also specified on the command line.
D indicates that newsyslog(8) should set the UF_NODUMP flag when creating a new version
of this log file. This option would effect how the dump(8) command treats the log file
when making a file system backup.
G indicates that the specified logfile_name is a shell pattern, and that newsyslog(8)
should archive all filenames matching that pattern using the other options on this
line. See glob(3) for details on syntax and matching rules.
J indicates that newsyslog(8) should attempt to save disk space by compressing the
rotated log file using bzip2(1).
N indicates that there is no process which needs to be signaled when this log file is
rotated.
U indicates that the file specified by path_to_pid_file will contain the ID for a process
group instead of a process. This option also requires that the first line in that file
be a negative value to distinguish it from a process ID.
Z indicates that newsyslog(8) should attempt to save disk space by compressing the
rotated log file using gzip(1).
- a minus sign will not cause any special processing, but it can be used as a placeholder
to create a flags field when you need to specify any of the following fields.
path_to_pid_file
This optional field specifies the file name containing a daemon's process ID or to find a group
process ID if the U flag was specified. If this field is present, a signal_number is sent the
process ID contained in this file. If this field is not present, then a SIGHUP signal will be
sent to syslogd(8), unless the N flag has been specified. This field must start with `/' in
order to be recognized properly.
signal_number
This optional field specifies the signal number that will be sent to the daemon process (or to
all processes in a process group, if the U flag was specified). If this field is not present,
then a SIGHUP signal will be sent.
SEE ALSO
bzip2(1), gzip(1), syslog(3), chown(8), newsyslog(8), syslogd(8)
HISTORY
This manual page first appeared in FreeBSD 4.10.
BSD June 3, 2004 BSD
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