phpman > info > svscan(8)

svscan(8)                   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 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. (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), readprocti-
       tle(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)