66-stop

This command stops one ore more services defined in tree.

Interface

    66-stop [ -h ] [ -z ] [ -v verbosity ] [ -l live ] [ -t tree ] [ -T timeout ] [ -u ] [ -X ] [ -K ] service(s)

The service to be stopped is expected to be enabled inside the given tree and started inside an already running scandir. If the state of the service is already down 66-stop does nothing. Generally speaking this command is the strict opposite of 66-start.

Multiple services can be stopped by seperating their names with a space.

Exit codes

• 0 success
• 100 wrong usage
• 111 system call failed

Options

• -h : prints this help.

• -z : use color.

• -v verbosity : increases/decreases the verbosity of the command.

  • 1 : only print error messages. This is the default.
  • 2 : also print warning messages.
  • 3 : also print tracing messages.
  • 4 : also print debugging messages.

• -l live : changes the supervision directory of service to live. By default this will be /run/66. The default can also be changed at compile time by passing the --livedir=live option to ./configure. An existing absolute path is expected and should be within a writable and executable filesystem - likely a RAM filesystem—see 66-scandir.

• -t : handles the selection of the given tree. This option is mandatory except if a tree was marked as 'current'—see 66-tree.

• -T timeout : specifies a timeout (in milliseconds) after which 66-stop will exit 111 with an error message if the service still hasn't reached the up state. By default, the timeout is 1000.

• -u : unsupervise the service. Remove the service directory from the scandir at the end of the stop process.

• -X : exit. The supervisor of the service will exit too. This command should normally never be used on a working system.

• -K : sends a SIGKILL to the service and keep it down.

Dependencies handling

In case of bundle, atomic or module any existing dependency chain will be resolved automatically. It is unnecessary to manually define chained sets of dependencies. If FooA has a declared dependency on another service with the name FooB then FooB will be automatically considered and stopped first when stopping FooA. This works recursively until all dependencies are stopped.

Classic service transitions

• 66-stop gathers the classic service(s) passed as argument in a list called selection.

• The selection is then inspected and searched for any logger that may be associated with the passed service(s). If any such instruction was found the corresponding logger will be added to the selection as well.

• The command continues issueing 66-svctl -v verbosity -T timeout -l live -t tree -D selection and waits for the resulting exit code.

• Finally the service directory is removed from the scandir.

If any one of these processes fails then as a result 66-stop fails too and exits with code 111.

Bundle, atomic and module transitions

The process for these service types is very similar to that of classic services except for the automated command that adapts accordingly.

• 66-stop gathers the bundle, atomic and module service(s) passed as argument in a list called selection.

• The selection is then inspected and searched for any logger that may be associated with the passed service(s). If any such instruction was found the corresponding logger will be added to the selection as well.

• Finally the command issues 66-dbctl -v verbosity -T timeout -l live -t tree -d selection and waits for the resulting exit code.

If any one of these processes fails then as a result 66-stop fails too and exits with code 111.