long bindmount(struct chan *c, char *old, int flag, char *spec)
{
ERRSTACK(1);
int ret;
struct chan *c1;
if (flag > MMASK || (flag & MORDER) == (MBEFORE | MAFTER))
error(EINVAL, ERROR_FIXME);
c1 = namec(old, Amount, 0, 0);
if (waserror()) {
cclose(c1);
nexterror();
}
ret = cmount(c, c1, flag, spec);
poperror();
cclose(c1);
return ret;
}
/* 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;
}
long
bindmount(int ismount, int fd, int afd, char* arg0, char* arg1, ulong flag, char* spec)
{
int ret;
Chan *c0, *c1, *ac, *bc;
struct{
Chan *chan;
Chan *authchan;
char *spec;
int flags;
}bogus;
if((flag&~MMASK) || (flag&MORDER)==(MBEFORE|MAFTER))
error(Ebadarg);
if(ismount){
validaddr((ulong)spec, 1, 0);
spec = validnamedup(spec, 1);
if(waserror()){
free(spec);
nexterror();
}
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.flags = flag & MCACHE;
bogus.chan = bc;
bogus.authchan = ac;
bogus.spec = spec;
ret = devno('M', 0);
c0 = devtab[ret]->attach((char*)&bogus);
poperror(); /* ac bc */
if(ac)
cclose(ac);
cclose(bc);
}else{
spec = 0;
validaddr((ulong)arg0, 1, 0);
c0 = namec(arg0, Abind, 0, 0);
}
if(waserror()){
cclose(c0);
nexterror();
}
validaddr((ulong)arg1, 1, 0);
c1 = namec(arg1, Amount, 0, 0);
if(waserror()){
cclose(c1);
nexterror();
}
ret = cmount(&c0, c1, flag, spec);
poperror();
cclose(c1);
poperror();
cclose(c0);
if(ismount){
fdclose(fd, 0);
poperror();
free(spec);
}
return ret;
}
