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NEWSYSLOG.CONF(5)         FreeBSD File Formats Manual        NEWSYSLOG.CONF(5)

     newsyslog.conf - newsyslog(8) configuration file

     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 determine 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 preceding `\' is removed and `#' is treated as an
     ordinary character.  The fields of the configuration file are as follows:

             Name of the system log file to be archived, or one of the literal
             strings ``<default>'', or ``<include>''.  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.  The include
             entry is used to include other configuration files and supports

             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.

     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 current 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

     when    The when field may consist of an interval, a specific time, or
             both.  If the when field contains 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 constructed with a `$' sign
             along with a rotation time specification of once a day, once a
             week, or once a month.

             Time based trimming happens only 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

             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
             comparison 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 midnight; hence if today is
             January 22, 1999, the following date specifications are all


             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]], respectively.
             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

     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 affect 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).

             X       indicates that newsyslog(8) should attempt to save disk
                     space by compressing the rotated log file using xz(1).

             N       indicates that there is no process which needs to be
                     signaled when this log file is rotated.

             R       if this flag is set the newsyslog(8) will run shell
                     command defined in path_to_pid_cmd_file after rotation
                     instead of trying to send signal to a process id stored
                     in the file.

             U       indicates that the file specified by path_to_pid_cmd_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.

             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 is sent to the
             process ID contained in this file.  If this field is not present
             and the N flag has not been specified, then a SIGHUP signal will
             be sent to syslogd(8) or to the process id found in the file
             specified by newsyslog(8)'s -S switch.  This field must start
             with `/' in order to be recognized properly.  When used with the
             R flag, the file is treated as a path to a binary to be executed
             by the newsyslog(8) after rotation instead of sending the signal

     signal  This optional field specifies the signal 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.  Signal names must start with ``SIG'' and be
             the signal name, e.g., SIGUSR1.  Alternatively, signal can be the
             signal number, e.g., 30 for SIGUSR1.

     The following is an example of the ``<include>'' entry:
           <include> /etc/newsyslog-local.conf

     bzip2(1), gzip(1), xz(1), syslog(3), chown(8), newsyslog(8), syslogd(8)

     This manual page first appeared in FreeBSD 4.10.

FreeBSD 11.1-RELEASE-p4        October 24, 2015        FreeBSD 11.1-RELEASE-p4
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