Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
svscan(8)		    System Manager's Manual		     svscan(8)

NAME
       svscan -	starts and monitors a collection of services

SYNOPSIS
       svscan [	directory ] [ log-service ]

DESCRIPTION
       svscan  starts  one  supervise(8)  process for each subdirectory	of the
       current directory, up to	a limit	of 1000	subdirectories.	 svscan	 skips
       subdirectory  names  starting  with dots.  supervise(8) must be in svs-
       can's path.

       svscan optionally starts	a pair of supervise(8) processes,  one	for  a
       subdirectory  s,	 one for s/log,	with a pipe between them. It does this
       if the name s is	at most	255 bytes long and s/log exists	and is	a  di-
       rectory.	 (In  versions	0.70  and below, it does this if s is sticky.)
       svscan needs two	free descriptors for each pipe.

       If log-service is specified and the named subdirectory  exists,	svscan
       starts  the  service  found  there and redirects	its output through it.
       This service is started before any other.

       Every five seconds, svscan checks for subdirectories again. If it  sees
       a new subdirectory, it starts a new supervise(8)	process. If it sees an
       old subdirectory	where a	supervise(8) process has exited,  it  restarts
       the  supervise(8)  process.  In the log case it reuses the same pipe so
       that no data is lost.

       svscan is designed to run forever. If it	has trouble creating a pipe or
       running	supervise(8), it prints	a message to stderr; it	will try again
       five seconds later.

       If svscan is given a command-line argument directory,  it  switches  to
       that directory when it starts.

SEE ALSO
       supervise(8),  svc(8),  svok(8),	 svstat(8), svscanboot(8), readprocti-
       tle(8), fghack(8), pgrphack(8), multilog(8), tai64n(8), tai64nlocal(8),
       setuidgid(8), envuidgid(8), envdir(8), softlimit(8), setlock(8)

								     svscan(8)

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=svscan&sektion=8&manpath=FreeBSD+12.2-RELEASE+and+Ports>

home | help