syslogd(1M) syslogd(1M)NAME syslogd - logs system messages SYNOPSIS syslogd [-d] [-fconfigfile] [-mmarkinterval] ARGUMENTS -d Turns on debugging. -fconfigfile Specifies an alternate configuration file. -mmarkinterval Selects the number of minutes between mark messages. DESCRIPTION syslogd reads and logs messages into a set of files described by the configuration file /etc/syslog.conf. Each message is one line. A message can contain a priority code, marked by a number in angle braces at the beginning of the line. Priorities are defined in <sys/syslog.h>. syslogd reads from the domain socket /dev/log, from an Internet domain socket specified in /etc/services. The syslogd command configures when it starts up and whenever it receives a hangup signal. Lines in the configuration file have a selector to determine the message priorities to which the line applies and an action. The action field is separated from the selector by one or more tabs. Selectors are semicolon-separated lists of priority specifiers. Each priority has a facility describing the part of the system that generated the message, a dot, and a level indicating the severity of the message. Symbolic names may be used. An asterisk selects all facilities. All messages of the specified level or higher (greater severity) are selected. More than one facility may be selected using commas to separate them. For example: *.emerg;mail,daemon.crit selects all facilities at the emerg level and the mail and daemon facilities at the crit level. Known facilities and levels recognized by syslogd are those listed in syslog(3) without the leading LOG_. The additional facility mark has a message at priority LOG_INFO sent to it every 20 minutes (this may be changed with the -m option). The mark facility is not enabled by a facility field containing an asterisk. The level none may be used to disable a particular facility. For example, January 1992 1
syslogd(1M) syslogd(1M)*.debug;mail.none sends all messages except mail messages to the selected file. The second part of each line describes where the message is to be logged if this line is selected. There are four forms: ⊕ A filename (beginning with a leading slash). The file will be opened in append mode. ⊕ A host name preceded by an at sign (``@''). Selected messages are forwarded to the syslogd on the named host. ⊕ A comma-separated list of users. Selected messages are written to those users if they are logged in. ⊕ An asterisk. Selected messages are written to all logged-in users. Blank lines and lines beginning with `#' are ignored. For example, the configuration file: *.notice;mail.info /usr/spool/adm/syslog *.crit /usr/adm/critical *.emerg * *.alert eric,kridle *.alert;auth.warning ralph logs all notice (or higher) level messages and all mail system messages except debug messages into the file /usr/spool/adm/syslog, and all critical messages into /usr/adm/critical. All users will be informed of any emergency messages, the users eric and kridle will be informed of any alert messages, and the user ralph will be informed of any alert message, or any warning message (or higher) from the authorization system. The syslogd command creates the file /etc/syslog.pid, if possible, containing a single line with its process ID. This can be used to kill or reconfigure syslogd. To bring syslogd down, it should be sent a terminate signal, such as: kill `cat /etc/syslog.pid` LIMITATIONS The syslogd command should log kernel messages, but does not. 2 January 1992
syslogd(1M) syslogd(1M)FILES /etc/syslogd Executable file /etc/syslog.conf Configuration file /etc/syslog.pid File containing the process ID /dev/log Name of the domain datagram log socket file SEE ALSO syslog(3) in A/UX Programmer's Reference January 1992 3