DragonFly On-Line Manual Pages

svscan(8)              DragonFly System Manager's Manual             svscan(8)

NAME
       svscan - starts and monitors a collection of services

SYNOPSIS
       svscan [ directory ]

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
       svscan'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. (In versions
       0.70 and below, it does this if s is sticky.)  svscan needs two free
       descriptors for each pipe.

       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),
       readproctitle(8), fghack(8), pgrphack(8), multilog(8), tai64n(8),
       tai64nlocal(8), setuidgid(8), envuidgid(8), envdir(8), softlimit(8),
       setlock(8)

       http://cr.yp.to/daemontools.html

                                                                     svscan(8)