FSHALT(8) FSHALT(8)
NAME
fshalt, scram, reboot - halt any local file systems and
optionally shut down or reboot the system
SYNOPSIS
fshalt [ -r [ kernelpath ] ]
reboot [ kernelpath ]
scram
DESCRIPTION
Fshalt syncs and halts all local cwfs(4) and hjfs(4)
servers. If given -r, fshalt will then reboot the machine,
optionally starting kernelpath. Else it will try to shut
down the machine through /dev/pmctl (if available) or invoke
scram. The halting and rebooting is done by copying all nec-
essary commands into a ramfs(4) file system and changing
directory there before attempting to halt file systems, so
this will work even on standalone machines with their roots
on local file systems.
Reboot restarts the machine it is invoked on. If an optional
kernelpath is specified then the machine will load and start
that kernel directly instead of returning to the system rom.
(see cons(3)).
Scram shuts down the machine it is invoked on by writing
power off to /dev/pmctl.
SOURCE
/rc/bin/fshalt
/rc/bin/reboot
/rc/bin/scram
SEE ALSO
acpi(8), cons(3), reboot(8)
BUGS
On standalone machines, it will be impossible to do anything
if scram fails after invoking bare fshalt.
Scram falls back to trying aux/acpi if writing to /dev/pmctl
fails.
HISTORY
Scram first appeared in 9front (May, 2011).
Page 1 Plan 9 (printed 12/16/25)