NAME

reboot - reboot CPU after loss of file server connection

SYNOPSIS

write(cfd, "push reboot", 11);


fd = open("#^/deltat", OWRITE);


fprint(fd, "%d", delaytime);

DESCRIPTION

This is a combined device and stream module (see stream(3)). The bootstrap program boot(8) pushes the module onto the file server connection of a CPU server. The system will then reboot automatically if the connection hangs up. The reboot may be postponed by delaytime milliseconds by writing the decimal value of delaytime to #^/deltat. Conventionally, this is done by /rc/bin/cpurc (see cpurc(8)). This mechanism may be used to cause the machines at a particular site to come up in a fixed order, such as after a power failure.

SEE ALSO

stream(3)

SOURCE

/sys/src/9/port/devreboot.c