/**
* <Ring 1> Perform the FCHDIR syscall.
*/
PUBLIC int do_fchdir(MESSAGE * p)
{
struct file_desc * filp = pcaller->filp[p->FD];
if (!filp) return EINVAL;
return change_node(&(pcaller->pwd), filp->fd_inode);
}
static void
rotate_left (MonoSimpleBasicBlock *bb, MonoSimpleBasicBlock **root)
{
MonoSimpleBasicBlock *other = bb->right;
if (other->left) {
bb->right = other->left;
bb->right->parent = bb;
} else
bb->right = NULL;
other->left = bb;
change_node (bb, other, root);
bb->parent = other;
}
static void
rotate_right (MonoSimpleBasicBlock *parent, MonoSimpleBasicBlock **root)
{
MonoSimpleBasicBlock *bb = parent->left;
if (bb->right) {
parent->left = bb->right;
parent->left->parent = parent;
} else
parent->left = NULL;
bb->right = parent;
change_node (parent, bb, root);
parent->parent = bb;
}
/**
* <Ring 1> Change the directory.
* @param ppin Directory to be change.
* @param string Pathname.
* @param len Length of pathname.
* @return Zero on success.
*/
PRIVATE int change_directory(struct inode ** ppin, char * string, int len)
{
char pathname[MAX_PATH];
if (len > MAX_PATH) return ENAMETOOLONG;
/* fetch the name */
data_copy(getpid(), D, pathname, proc2pid(pcaller), D, string, len);
//phys_copy(va2pa(getpid(), pathname), va2pa(proc2pid(pcaller), string), len);
pathname[len] = '\0';
struct inode * pin = resolve_path(pathname, pcaller);
if (!pin) return err_code;
int retval = change_node(ppin, pin);
put_inode(pin);
return retval;
}
