Chan*
devattach(int dc, char *spec)
{
if (0) print_func_entry();
Chan *c;
char *buf;
/*
* There are no error checks here because
* this can only be called from the driver of dc
* which pretty much guarantees devtabget will
* succeed.
*/
c = newchan();
mkqid(&c->qid, 0, 0, QTDIR);
c->dev = devtabget(dc, 0);
if(spec == nil)
spec = "";
buf = smalloc(1+UTFmax+strlen(spec)+1);
sprint(buf, "#%C%s", dc, spec);
c->path = newpath(buf);
free(buf);
if (0) print_func_exit();
return c;
}
static usize
dirfixed(uint8_t *p, uint8_t *e, Dir *d)
{
int len;
Dev *dev;
len = GBIT16(p)+BIT16SZ;
if(p + len > e)
return 0;
p += BIT16SZ; /* ignore size */
dev = devtabget(GBIT16(p), 1); //XDYNX
if(dev != nil){
d->type = dev->dc;
//devtabdecr(dev);
}
else
d->type = -1;
p += BIT16SZ;
d->dev = GBIT32(p);
p += BIT32SZ;
d->qid.type = GBIT8(p);
p += BIT8SZ;
d->qid.vers = GBIT32(p);
p += BIT32SZ;
d->qid.path = GBIT64(p);
p += BIT64SZ;
d->mode = GBIT32(p);
p += BIT32SZ;
d->atime = GBIT32(p);
p += BIT32SZ;
d->mtime = GBIT32(p);
p += BIT32SZ;
d->length = GBIT64(p);
return len;
}
/* if dc is non-zero, it means we're doing a mount and dc is the mount device to use. */
static int
bindmount(int dc, int fd, int afd, char* arg0, char* arg1, int flag, char* spec)
{
Proc *up = externup();
int i;
Dev *dev;
Chan *c0, *c1, *ac, *bc;
struct{
Chan *chan;
Chan *authchan;
char *spec;
int flags;
}bogus;
if((flag&~MMASK) || (flag&MORDER)==(MBEFORE|MAFTER))
error(Ebadarg);
bogus.flags = flag & MCACHE;
if(dc){
if (! checkdc(dc))
error(Ebadarg);
if(up->pgrp->noattach)
error(Enoattach);
ac = nil;
bc = fdtochan(fd, ORDWR, 0, 1);
if(waserror()) {
if(ac)
cclose(ac);
cclose(bc);
nexterror();
}
if(afd >= 0)
ac = fdtochan(afd, ORDWR, 0, 1);
bogus.chan = bc;
bogus.authchan = ac;
bogus.spec = validaddr(spec, 1, 0);
if(waserror())
error(Ebadspec);
spec = validnamedup(spec, 1);
poperror();
if(waserror()){
free(spec);
nexterror();
}
dev = devtabget(dc, 0); //XDYNX
if(waserror()){
//devtabdecr(dev);
nexterror();
}
c0 = dev->attach((char*)&bogus);
poperror();
//devtabdecr(dev);
poperror(); /* spec */
free(spec);
poperror(); /* ac bc */
if(ac)
cclose(ac);
cclose(bc);
}else{
bogus.spec = nil;
c0 = namec(validaddr(arg0, 1, 0), Abind, 0, 0);
}
if(waserror()){
cclose(c0);
nexterror();
}
c1 = namec(validaddr(arg1, 1, 0), Amount, 0, 0);
if(waserror()){
cclose(c1);
nexterror();
}
i = cmount(&c0, c1, flag, bogus.spec);
poperror();
cclose(c1);
poperror();
cclose(c0);
if(dc)
fdclose(fd, 0);
return i;
}
