void
cmd_cfs(void)
{
Filsys *fs;
if(*cons.arg != ' ') {
fs = &filesys[0]; /* default */
} else {
if(skipbl(1)){
cprint("skipbl\n");
return;
}
if(!nextelem())
fs = &filesys[0]; /* default */
else
fs = fsstr(elem);
}
if(fs == 0) {
cprint("unknown file system %s\n", elem);
return;
}
if(con_attach(FID1, "adm", fs->name))
panic("FID1 attach to root");
cur_fs = fs;
}
/* copy worm fs from "main"'s inner worm to "output" */
static void
dowormcopy(void)
{
Filsys *f1, *f2;
Device *fdev, *from, *to = nil;
Iobuf *p;
Off a;
Devsize lim;
/*
* convert file system names into Filsyss and Devices.
*/
f1 = fsstr("main");
if(f1 == nil)
panic("main file system missing");
fdev = f1->dev;
from = wormof(fdev); /* fake worm special */
if (from->type != Devfworm && from->type != Devcw) {
print("main file system is not a worm; copyworm may not do what you want!\n");
print("waiting for 20 seconds...\n");
delay(20000);
}
f2 = fsstr("output");
if(f2 == nil) {
print("no output file system - check only\n\n");
print("reading worm from %Z (worm %Z)\n", fdev, from);
} else {
to = f2->dev;
print("\ncopying worm from %Z (worm %Z) to %Z, starting in 8 seconds\n",
fdev, from, to);
delay(8000);
}
if (userabort("preparing to copy"))
return;
/*
* initialise devices, size them, more sanity checking.
*/
devinit(from);
if (0 && fdev != from) {
devinit(fdev);
print("debugging, sizing %Z first\n", fdev);
writtensize(fdev);
}
lim = writtensize(from);
if(lim == 0)
panic("no blocks to copy on %Z", from);
if (to) {
print("reaming %Z in 8 seconds\n", to);
delay(8000);
if (userabort("preparing to ream & copy"))
return;
devream(to, 0);
devinit(to);
print("copying worm: %lld blocks from %Z to %Z\n",
(Wideoff)lim, from, to);
}
/* can't read to's blocks in case to is a real WORM device */
/*
* Copy written fs blocks, a block at a time (or just read
* if no "output" fs).
*/
for (a = 0; a < lim; a++) {
if (userabort("copy"))
break;
p = getbuf(from, a, Brd);
/*
* if from is a real WORM device, we'll get errors trying to
* read unwritten blocks, but the unwritten blocks need not
* be contiguous.
*/
if (p == 0) {
print("%lld not written yet; can't read\n", (Wideoff)a);
continue;
}
if (to != 0 && devwrite(to, p->addr, p->iobuf) != 0) {
print("out block %lld: write error; bailing",
(Wideoff)a);
break;
}
putbuf(p);
if(a % 20000 == 0)
print("block %lld %T\n", (Wideoff)a, time(nil));
}
/*
* wrap up: sync target, loop
*/
print("copied %lld blocks from %Z to %Z\n", (Wideoff)a, from, to);
sync("wormcopy");
delay(2000);
print("looping; reset the machine at any time.\n");
for (; ; )
continue; /* await reset */
}
void
f_attach(Chan *cp, Oldfcall *in, Oldfcall *ou)
{
Iobuf *p;
Dentry *d;
File *f;
int u;
Filsys *fs;
int32_t raddr;
if(CHAT(cp)) {
print("c_attach %d\n", cp->chan);
print(" fid = %d\n", in->fid);
print(" uid = %s\n", in->uname);
print(" arg = %s\n", in->aname);
}
ou->qid = QID9P1(0,0);
ou->fid = in->fid;
if(!in->aname[0]) /* default */
strncpy(in->aname, filesys[0].name, sizeof(in->aname));
p = 0;
f = filep(cp, in->fid, 1);
if(!f) {
ou->err = Efid;
goto out;
}
u = -1;
if(cp != cons.chan){
if(authorize(cp, in, ou) == 0 || strcmp(in->uname, "adm") == 0){
ou->err = Eauth;
goto out;
}
u = strtouid(in->uname);
if(u < 0){
ou->err = Ebadu;
goto out;
}
}
fs = fsstr(in->aname);
if(fs == 0) {
ou->err = Ebadspc;
goto out;
}
raddr = getraddr(fs->dev);
p = getbuf(fs->dev, raddr, Bread);
d = getdir(p, 0);
if(!d || checktag(p, Tdir, QPROOT) || !(d->mode & DALLOC)) {
ou->err = Ealloc;
goto out;
}
f->uid = u;
if(iaccess(f, d, DREAD)) {
ou->err = Eaccess;
goto out;
}
accessdir(p, d, FREAD);
mkqid(&f->qid, d, 1);
f->fs = fs;
f->addr = raddr;
f->slot = 0;
f->open = 0;
freewp(f->wpath);
f->wpath = 0;
mkqid9p1(&ou->qid, &f->qid);
out:
if(p)
putbuf(p);
if(f) {
qunlock(f);
if(ou->err)
freefp(f);
}
}
