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66-dbctl.md 2.47 KiB

title: The 66 Suite: 66-dbctl author: Eric Vidal eric@obarun.org

66

Software

obarun.org

66-dbctl

This command is used to control an already supervised service in live defined in tree.

Interface

    66-dbctl [ -h ] [ -z ] [ -v verbosity ] [ -l live ] [ -t tree ] [ -T timeout ] [ -u | d | r ] service(s)

66-dbctl expects to find an already supervised service in live defined in the given tree and an already running scandir.

(!) This tool only deals with bundle, module and atomic services—for classic services see 66-svctl.

Multiple services can be handled by separating their names with a space. 66-dbctl gathers the services passed as argument in a list called selection.

If service is not given, 66-dbctl deals with all bundle, module and atomic services of the given tree.

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 %%livedir%%. 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 general timeout (in milliseconds) after which 66-dbctl will exit 111 with an error message if the selection still hasn't reached the desired state for each service; default is 0 (blocks indefinitely).

  • -u : sends an up signal to the service.

  • -r : reload the service. It sends a down signal then a up signal to the service.

Note

This tool is a safe wrapper around s6-rc. It exclusively handles files that form part of the 66 ecosystem before sending the selection list to s6-rc.