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66-hpr

Triggers the software shutdown procedure. Performs an immediate hardware shutdown with the ‑f option. It is normally invoked by the 66 halt, 66 poweroff, 66 reboot, 66 suspend or 66 hibernate commands. This program is a modified copy of s6-linux-init-hpr.

This program is primarily used internally by 66. User may prefer to use 66 halt, 66 poweroff, 66 reboot, 66 suspend or 66 hibernate instead.

Interface

66-hpr [ -H ] [ -l live ] [ -b banner ] [ -f ] [ -h | -p | -r | -s | -i ] [ -n ] [ -d | -w ] [ -W ]

  • If the -s or -i option is passed the system is suspended or hibernated: the kernel power state is written synchronously and the command returns once the machine wakes up. No service is stopped.

  • Else if the -f option is passed the system is stopped or rebooted immediately without properly cleaning up.

  • Else the machine's shutdown procedure is started.

  • For -h, -p and -r, the command exits 0 and the shutdown procedure happens asynchronously.

This is the traditional sysvinit interface for the halt, poweroff and reboot programs. 66‑hpr must always be called with either ‑h, ‑p, ‑r, ‑s or ‑i.

Options

  • -H, --help: prints this help.

  • -l, --live 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 -D livedir=live option to meson setup. An existing absolute path is expected and should be within a writable and executable filesystem — likely a RAM filesystem — see 66 scandir.

  • -b, --banner banner: Text to display before executing the shutdown process. Defaults to:

*** WARNING ***
The system is going down NOW!

  • -f, --force: force. The command will not trigger a clean shutdown procedure; it will only sync the filesystems then tell the kernel to immediately halt, poweroff and reboot. This should be the last step in the lifetime cycle of the machine.

  • -h, --halt: halt. The system will be shut down but the power will remain connected.

  • -p, --poweroff: poweroff. Like halt but the power will also be turned off.

  • -r, --reboot: reboot. The system will initialize a warm boot without disconnecting power.

  • -s, --suspend: suspend. The system is suspended to RAM by writing mem to /sys/power/state. The call blocks until the machine wakes up; no service is stopped.

  • -i, --hibernate: hibernate. The system is hibernated to disk by writing disk to /sys/power/state. This requires a properly configured swap device. The call blocks until the machine wakes up; no service is stopped.

  • -n, --no-sync: Do not call sync() before the hardware shutdown. The default is to sync, just in case. This option is relevant when combined with -f, -s or -i; without one of them, it has no effect.

  • -d, --no-wtmp: Do not write a wtmp shutdown entry—see utmp,wtmp and btmp.

  • -w, --wtmp-only: Only write a wtmp shutdown entry; does not actually shut down the system.

  • -W, --no-wall: Do not send a wall message to users before shutting down the system. Some other implementations of the halt, poweroff and reboot commands use the ‑‑no‑wall long option to achieve this.