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    Command:

    start-stop-daemon

    
    
    

    SYNOPSIS

           start-stop-daemon [option...] command
    
    
    

    DESCRIPTION

           start-stop-daemon  is  used  to control the creation and termination of
           system-level  processes.   Using   one   of   the   matching   options,
           start-stop-daemon  can  be  configured  to find existing instances of a
           running process.
    
           Note: unless --pidfile is specified, start-stop-daemon behaves  similar
           to  killall(1).   start-stop-daemon will scan the process table looking
           for any processes which match the process name,  uid,  and/or  gid  (if
           specified). Any matching process will prevent --start from starting the
           daemon. All matching processes will be sent the TERM signal (or the one
           specified  via --signal or --retry) if --stop is specified. For daemons
           which have long-lived children which need to live through a --stop, you
           must specify a pidfile.
    
    
    

    COMMANDS

           -S, --start [--] arguments
                  Check  for the existence of a specified process.  If such a pro-
                  cess exists, start-stop-daemon  does  nothing,  and  exits  with
                  error  status 1 (0 if --oknodo is specified).  If such a process
                  does not exist, it starts an instance,  using  either  the  exe-
                  cutable specified by --exec or, if specified, by --startas.  Any
                  arguments given after -- on the command line are passed  unmodi-
                  fied to the program being started.
    
           -K, --stop
                  Checks for the existence of a specified process.  If such a pro-
                  cess exists, start-stop-daemon sends it the signal specified  by
                  --signal, and exits with error status 0.  If such a process does
                  not exist, start-stop-daemon exits with error  status  1  (0  if
                  --oknodo   is   specified).   If   --retry  is  specified,  then
                  start-stop-daemon will check that the  process(es)  have  termi-
                  nated.
    
           -T, --status
                  Check  for  the existence of a specified process, and returns an
                  exit status code, according to the LSB Init Script Actions.
    
           -H, --help
                  Show usage information and exit.
    
           -V, --version
                  Show the program version and exit.
    
    
    

    MATCHING OPTIONS

           -p, --pidfile pid-file
                  Check whether a process has created the file pid-file.
    
           -x, --exec executable
    
           -s, --signal signal
                  With  --stop,  specifies  the  signal to send to processes being
                  stopped (default TERM).
    
           -R, --retry timeout|schedule
                  With  --stop,  specifies  that  start-stop-daemon  is  to  check
                  whether  the  process(es)  do  finish.  It will check repeatedly
                  whether any matching processes are running, until none  are.  If
                  the  processes  do  not exit it will then take further action as
                  determined by the schedule.
    
                  If timeout is specified instead of schedule, then  the  schedule
                  signal/timeout/KILL/timeout  is used, where signal is the signal
                  specified with --signal.
    
                  schedule is a list of at least two items  separated  by  slashes
                  (/);  each  item  may be -signal-number or [-]signal-name, which
                  means to send that signal, or timeout, which means to wait  that
                  many  seconds  for processes to exit, or forever, which means to
                  repeat the rest of the schedule forever if necessary.
    
                  If the end of the schedule is reached and forever is not  speci-
                  fied,  then  start-stop-daemon  exits with error status 2.  If a
                  schedule is specified, then any signal specified  with  --signal
                  is ignored.
    
           -a, --startas pathname
                  With  --start,  start the process specified by pathname.  If not
                  specified, defaults to the argument given to --exec.
    
           -t, --test
                  Print actions that would be taken  and  set  appropriate  return
                  value, but take no action.
    
           -o, --oknodo
                  Return  exit  status 0 instead of 1 if no actions are (would be)
                  taken.
    
           -q, --quiet
                  Do not print informational messages;  only  display  error  mes-
                  sages.
    
           -c, --chuid username|uid[:group|gid]
                  Change to this username/uid before starting the process. You can
                  also specify a group by appending a :, then the group or gid  in
                  the  same way as you would for the 'chown' command (user:group).
                  If a user is specified without a group, the primary GID for that
                  user  is used.  When using this option you must realize that the
                  primary and supplemental groups are set as  well,  even  if  the
                  --group  option is not specified. The --group option is only for
                  groups that the user isn't normally a member of (like adding per
                  This option will force start-stop-daemon to fork before starting
                  the  process,  and  force  it  into  the  background.   WARNING:
                  start-stop-daemon cannot check the exit status  if  the  process
                  fails  to  execute for any reason. This is a last resort, and is
                  only meant for programs that either make  no  sense  forking  on
                  their  own,  or where it's not feasible to add the code for them
                  to do this themselves.
    
           -N, --nicelevel int
                  This alters the priority of the process before starting it.
    
           -P, --procsched policy:priority
                  This alters the process scheduler policy  and  priority  of  the
                  process before starting it. The priority can be optionally spec-
                  ified by appending a : followed by the value. The default prior-
                  ity  is 0. The currently supported policy values are other, fifo
                  and rr.
    
           -I, --iosched class:priority
                  This alters the IO scheduler class and priority of  the  process
                  before  starting it. The priority can be optionally specified by
                  appending a : followed by the value. The default priority is  4,
                  unless  class  is idle, then priority will always be 7. The cur-
                  rently supported values for  class  are  idle,  best-effort  and
                  real-time.
    
           -k, --umask mask
                  This sets the umask of the process before starting it.
    
           -m, --make-pidfile
                  Used  when  starting  a program that does not create its own pid
                  file. This option will make start-stop-daemon  create  the  file
                  referenced  with --pidfile and place the pid into it just before
                  executing the process. Note, the file will not be  removed  when
                  stopping  the  program.   NOTE: This feature may not work in all
                  cases. Most notably when the program being executed  forks  from
                  its  main  process.  Because  of this, it is usually only useful
                  when combined with the --background option.
    
           -v, --verbose
                  Print verbose informational messages.
    
    
    

    EXIT STATUS

           0      The requested action was performed. If --oknodo  was  specified,
                  it's also possible that nothing had to be done.  This can happen
                  when --start was specified and a matching  process  was  already
                  running, or when --stop was specified and there were no matching
                  processes.
    
           1      If --oknodo was not specified and nothing was done.
    
           2      If --stop and --retry were specified, but the end of the  sched-
    
    
    

    EXAMPLE

           Start the food daemon, unless one is already running (a  process  named
           food, running as user food, with pid in food.pid):
    
                  start-stop-daemon --start --oknodo --user food --name food --pidfile /var/run/food.pid --startas /usr/sbin/food --chuid food -- --daemon
    
           Send SIGTERM to food and wait up to 5 seconds for it to stop:
    
                  start-stop-daemon --stop --oknodo --user food --name food --pidfile /var/run/food.pid --retry 5
    
           Demonstration of a custom schedule for stopping food:
    
                  start-stop-daemon --stop --oknodo --user food --name food --pidfile /var/run/food.pid --retry=TERM/30/KILL/5
    
    
    

    AUTHORS

           Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl> based on a pre-
           vious version by Ian Jackson <ian@chiark.greenend.org.uk>.
    
           Manual page by Klee Dienes <klee@mit.edu>, partially reformatted by Ian
           Jackson.
    
    
    

    Debian Project 2011-07-04 start-stop-daemon(8)

    
    
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