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implement Broke;
include "sys.m";
sys: Sys;
include "draw.m";
Broke: module
{
init: fn(nil: ref Draw->Context, args: list of string);
};
init(nil: ref Draw->Context, nil: list of string)
{
sys = load Sys Sys->PATH;
fd := sys->open("/prog", Sys->OREAD);
if(fd == nil)
err(sys->sprint("can't open /prog: %r"));
killed := "";
for(;;){
(n, dir) := sys->dirread(fd);
if(n <= 0){
if(n < 0)
err(sys->sprint("error reading /prog: %r"));
break;
}
for(i := 0; i < n; i++)
if(isbroken(dir[i].name) && kill(dir[i].name))
killed += sys->sprint(" %s", dir[i].name);
}
if(killed != nil)
sys->print("%s\n", killed);
}
isbroken(pid: string): int
{
statf := "/prog/" + pid + "/status";
fd := sys->open(statf, Sys->OREAD);
if (fd == nil)
return 0;
buf := array[256] of byte;
n := sys->read(fd, buf, len buf);
if (n < 0) { # process died or is exiting
# sys->fprint(stderr(), "broke: can't read %s: %r\n", statf);
return 0;
}
(nf, l) := sys->tokenize(string buf[0:n], " ");
return nf >= 5 && hd tl tl tl tl l == "broken";
}
kill(pid: string): int
{
ctl := "/prog/" + pid + "/ctl";
fd := sys->open(ctl, sys->OWRITE);
if(fd == nil || sys->fprint(fd, "kill") < 0){
sys->fprint(stderr(), "broke: can't kill %s: %r\n", pid); # but press on
return 0;
}
return 1;
}
err(s: string)
{
sys->fprint(sys->fildes(2), "broke: %s\n", s);
raise "fail:error";
}
stderr(): ref Sys->FD
{
return sys->fildes(2);
}
user(): string
{
fd := sys->open("/dev/user", sys->OREAD);
if(fd == nil)
return "inferno";
buf := array[64] of byte;
n := sys->read(fd, buf, len buf);
if(n <= 0)
return "inferno";
return string buf[0:n];
}
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