static void
p9part(SDunit *unit, char *name)
{
SDpart *p;
char *field[4], *line[Npart+1];
uint32_t start, end;
int i, n;
p = sdfindpart(unit, name);
if(p == nil)
return;
if(tsdbio(unit, p, partbuf, unit->secsize, 0) < 0)
return;
partbuf[unit->secsize-1] = '\0';
if(strncmp((char*)partbuf, "part ", 5) != 0)
return;
n = getfields((char*)partbuf, line, Npart+1, '\n');
if(n == 0)
return;
for(i = 0; i < n && unit->npart < SDnpart; i++){
if(strncmp(line[i], "part ", 5) != 0)
break;
if(getfields(line[i], field, 4, ' ') != 4)
break;
start = strtoul(field[2], 0, 0);
end = strtoul(field[3], 0, 0);
if(start >= end || end > unit->sectors)
break;
sdaddpart(unit, field[1], p->start+start, p->start+end);
}
}
/*
* look for a plan 9 partition table on drive `unit' in the second
* sector (sector 1) of partition `name'.
* if found, add the partitions defined in the table.
*/
static void
p9part(SDunit *unit, char *name)
{
SDpart *p;
char *field[4], *line[Npart+1];
uvlong start, end;
int i, n;
dprint("p9part %s %s\n", unit->name, name);
p = sdfindpart(unit, name);
if(p == nil)
return;
if(sdreadblk(unit, p, partbuf, unit->secsize, 0) < 0)
return;
partbuf[unit->secsize-1] = '\0';
if(strncmp((char*)partbuf, "part ", 5) != 0)
return;
n = gettokens((char*)partbuf, line, Npart+1, "\n");
if(n == 0)
return;
for(i = 0; i < n && unit->npart < SDnpart; i++){
if(strncmp(line[i], "part ", 5) != 0)
break;
if(gettokens(line[i], field, 4, " ") != 4)
break;
start = strtoull(field[2], 0, 0);
end = strtoull(field[3], 0, 0);
if(start >= end || end > unit->sectors)
break;
sdaddpart(unit, field[1], p->start+start, p->start+end);
}
}
void*
sdgetfspart(int i, char *s, int chatty)
{
SDunit *unit;
SDpart *p;
Scsicrud *crud;
if(cdmask&(1<<i)){
if(strcmp(s, "cdboot") != 0)
return nil;
}else if(sdmask&(1<<i)){
if(strcmp(s, "cdboot") == 0)
return nil;
}
unit = sdindex2unit(i);
if((p = sdfindpart(unit, s)) == nil){
if(chatty)
print("unknown partition %s!%s\n", unit->name, s);
return nil;
}
if(p->crud == nil) {
crud = malloc(sizeof(Scsicrud));
crud->fs.dev = i;
crud->fs.diskread = sdread;
crud->fs.diskseek = sdseek;
// crud->start = 0;
crud->unit = unit;
crud->part = p;
if(dosinit(&crud->fs) < 0 && dosinit(&crud->fs) < 0 && kfsinit(&crud->fs) < 0){
if(chatty)
print("partition %s!%s does not contain a DOS or KFS file system\n",
unit->name, s);
return nil;
}
p->crud = crud;
}
return p->crud;
}