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|
implement Shutdown;
include "sys.m";
sys: Sys;
FD: import Sys;
stderr: ref FD;
include "draw.m";
Context: import Draw;
sysctl: con "/dev/sysctl";
reboot: con "reboot";
halt: con "halt";
Shutdown: module
{
init: fn(ctxt: ref Context, argv: list of string);
};
rflag: int;
hflag: int;
init(nil: ref Context, argv: list of string)
{
sys = load Sys Sys->PATH;
stderr = sys->fildes(2);
argv = tl argv;
if(len argv < 1)
usage();
while(argv != nil && len hd argv && (arg := hd argv)[0] == '-' && len arg > 1){
case arg[1] {
'r' =>
rflag = 1;
'h' =>
hflag = 1;
}
argv = tl argv;
}
if(rflag == 0 && hflag == 0)
usage();
if(rflag == 1 && hflag == 1)
usage();
fd := sys->open(sysctl, sys->OWRITE);
if(fd == nil) {
sys->fprint(stderr, "shutdown: %r\n");
exit;
}
if(rflag == 1)
if (sys->write(fd, array of byte reboot, len reboot) < 0) {
sys->fprint(stderr, "shutdown: write failed: %r\n");
exit;
}
if(hflag == 1)
if (sys->write(fd, array of byte halt, len halt) < 0) {
sys->fprint(stderr, "shutdown: write failed: %r\n");
exit;
}
}
usage()
{
sys->fprint(stderr, "usage: shutdown -r | -h\n");
exit;
}
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