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66-shutdownd.md 2.13 KiB

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

66

obarun.org

66-shutdownd

The daemon that manages the shutdown procedure for a 66-boot installation. It is not meant to be called directly. This program is a modified copy of s6-linux-init-shudownd.

Interface

    66-shutdownd [ -h ] [ -l live ] [ -s skel ] [ -g gracetime ]

  • 66-shutdownd opens the %%livedir%%/scandir/0/shutdownd/fifo pipe and listens to it. Programs such as 66-shutdown send their commands to this pipe when they are told to trigger the shutdown procedure.

  • When it receives a command to shut down 66-shutdownd parses the skel file rc.init—defined by default at %%skel%% directory— and reads the value of RCSHUTDOWN to be able to spawn the rc.shutdown script.

  • When said script exits 66-shutdownd kills all processes first with a SIGTERM then, after the grace time specified by the shutdown command, with a SIGKILL.

  • It then runs an automatically generated script called stage4 which unmounts all file systems and halts, powers off or reboots the machine.

Exit codes

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

Options

  • -h : prints this help.

  • -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.

  • -s skel : an absolute path; directory of the skeleton file rc.init. Default is %%skel%%.

  • -g gracetime : specify a grace time between the SIGTERM and the SIGKILL in milliseconds if the shutdown command does not provide one. Defaults to 3000.

Note

The 66-shutdownd binary is not meant to be called directly. It is automatically generated by a 66-scandir program invocation.