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FSCD(8) System Manager's Manual FSCD(8) NAME fscd -- service state monitoring daemon SYNOPSIS fscd [-dfVv] [-p pidfile] [-s socket] [-c file] DESCRIPTION The fscd FreeBSD, service control daemon, is a service which monitors states of other services and attempts to restart them if they die. When invoked, the fscd utility will check for services listed in its configuration file, /usr/local/etc/fscd.conf and create a socket to listen for messages from fscadm(8), FreeBSD the services control admin- istration utility. The fscadm(8) utility will allow for the addition or removal of services from the fscd(8) internal monitoring list. When monitored services terminate, they will be restarted, and a noti- fication will be logged to the LOG_ERR facility. If fscd is unable to successfully start a service, it will be removed and a log message will be issued. fscd uses the kqueue(2) interface to be notified about process termina- tions and rc(8), resp. service(8) for (re)starting services, getting their pids and initially checking their status. fscd is subject the same rules which govern rc(8); meaning that ser- vices must have an entry in rc.conf(5) before they may be handled through this interface. After successfully becoming a daemon, services may be added using the fscadm(8) utility. SIGNALS Several signals don't restart the service immediately as they may be the result of the user restarting it by hand. Instead, fscd will wait up to 60 seconds for the service to restart. These are: - SIGINT - SIGTERM - SIGUSR1 - SIGUSR2 - SIGKILL OPTIONS -d Run fscd in the background as a deamon. The default is to run in the foreground to show service start messages on the screen. -f Force, if the socket already exists, delete it. This can occur if fscd is already running or was not properly shut down be- fore. -V Print out the version of fscd and exit. -v Verbose, don't fork to background and don't log to syslog(3) but to console. -p pidfile Use alternative pidfile pid file instead of the standard /var/run/fscd.pid. -s socket Use socket socket instead of the standard socket /var/run/fscd.sock. -c file Use file file as configuration file instead of the standard file /usr/local/etc/fscd.conf. FILES /var/run/fscd.sock name of the Unix domain socket /usr/local/etc/fscd.conf name of the configuration file SEE ALSO kqueue(2), signal(3), syslog(3), fscd.conf(5), rc.conf(5), fscadm(8), rc(8), rcorder(8), service(8), syslog(8) HISTORY The fscd utility is available in both the ports collection and github. AUTHORS The fsc utilities and documentation were written by Tom Rhodes <trhodes@FreeBSD.org>. BUGS The fscd utility may fail to start a service if the parent died with a SIGKILL and children, with unique PIDs are not subsequently killed off. Such cases usally leave resources, such as port numbers or pidfiles around which confuse service(8). This behavior has been observed on several operating systems and should possibly be fixed by the software in question. FreeBSD Ports 14.quarterly September 03, 2018 FSCD(8)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | FILES | SEE ALSO | HISTORY | AUTHORS | BUGS
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