void
ctlwrite(Req *r)
{
int i;
Cmdbuf *cb;
vlong start, end;
r->ofcall.count = r->ifcall.count;
cb = parsecmd(r->ifcall.data, r->ifcall.count);
if(cb->nf < 1){
respond(r, "empty control message");
free(cb);
return;
}
if(strcmp(cb->f[0], "part") == 0){
if(cb->nf != 4){
respondcmderror(r, cb, "part takes 3 args");
free(cb);
return;
}
start = strtoll(cb->f[2], 0, 0);
end = strtoll(cb->f[3], 0, 0);
if(addpart(cb->f[1], start, end) < 0){
respondcmderror(r, cb, "%r");
free(cb);
return;
}
}
else if(strcmp(cb->f[0], "delpart") == 0){
if(cb->nf != 2){
respondcmderror(r, cb, "delpart takes 1 arg");
free(cb);
return;
}
if(delpart(cb->f[1]) < 0){
respondcmderror(r, cb, "%r");
free(cb);
return;
}
}
else if(strcmp(cb->f[0], "inquiry") == 0){
if(cb->nf != 2){
respondcmderror(r, cb, "inquiry takes 1 arg");
free(cb);
return;
}
free(inquiry);
inquiry = estrdup9p(cb->f[1]);
}
else if(strcmp(cb->f[0], "geometry") == 0){
if(cb->nf != 6){
respondcmderror(r, cb, "geometry takes 5 args");
free(cb);
return;
}
nsect = strtoll(cb->f[1], 0, 0);
sectsize = strtoll(cb->f[2], 0, 0);
c = strtoll(cb->f[3], 0, 0);
h = strtoll(cb->f[4], 0, 0);
s = strtoll(cb->f[5], 0, 0);
if(tab[0].inuse && strcmp(tab[0].name, "data") == 0 && tab[0].vers == 0){
tab[0].offset = 0;
tab[0].length = nsect;
}
for(i=0; i<nelem(tab); i++){
if(tab[i].inuse && tab[i].offset+tab[i].length > nsect){
tab[i].inuse = 0;
free(tab[i].name);
tab[i].name = 0;
}
}
}
else{
respondcmderror(r, cb, "unknown control message");
free(cb);
return;
}
free(cb);
respond(r, nil);
}
static void
ctlwrite0(Req *r, char *msg, Cmdbuf *cb)
{
vlong start, end;
Part *p;
r->ofcall.count = r->ifcall.count;
if(cb->nf < 1){
respond(r, "empty control message");
return;
}
if(strcmp(cb->f[0], "part") == 0){
if(cb->nf != 4){
respondcmderror(r, cb, "part takes 3 args");
return;
}
start = strtoll(cb->f[2], 0, 0);
end = strtoll(cb->f[3], 0, 0);
if(addpart(cb->f[1], start, end) < 0){
respondcmderror(r, cb, "%r");
return;
}
}
else if(strcmp(cb->f[0], "delpart") == 0){
if(cb->nf != 2){
respondcmderror(r, cb, "delpart takes 1 arg");
return;
}
if(delpart(cb->f[1]) < 0){
respondcmderror(r, cb, "%r");
return;
}
}
else if(strcmp(cb->f[0], "inquiry") == 0){
if(cb->nf != 2){
respondcmderror(r, cb, "inquiry takes 1 arg");
return;
}
free(inquiry);
inquiry = estrdup9p(cb->f[1]);
}
else if(strcmp(cb->f[0], "geometry") == 0){
if(cb->nf != 3){
respondcmderror(r, cb, "geometry takes 2 args");
return;
}
nsect = strtoll(cb->f[1], 0, 0);
sectsize = strtoll(cb->f[2], 0, 0);
if(tab[0].inuse && strcmp(tab[0].name, "data") == 0 &&
tab[0].vers == 0){
tab[0].offset = 0;
tab[0].length = nsect;
}
for(p = tab; p < tab + nelem(tab); p++)
if(p->inuse && p->offset + p->length > nsect){
p->inuse = 0;
free(p->name);
p->name = nil;
}
} else
/* pass through to underlying ctl file, if any */
if (write(ctlfd, msg, r->ifcall.count) != r->ifcall.count) {
respondcmderror(r, cb, "%r");
return;
}
respond(r, nil);
}
