bool FileSystem::rmtree(const Path& path) {
Directory* test_dir = opendir(path);
if (test_dir != NULL) {
auto_Object<Directory> dir(test_dir);
Directory::Entry* test_dentry = dir->read();
if (test_dentry != NULL) {
auto_Object<Directory::Entry> dentry(*test_dentry);
do {
if (dentry->is_special()) {
continue;
}
Path dentry_path(path / dentry->get_name());
if (dentry->ISDIR()) {
if (rmtree(dentry_path)) {
continue;
} else {
return false;
}
} else if (unlink(dentry_path)) {
continue;
} else {
return false;
}
} while (dir->read(*dentry));
return rmdir(path);
}
}
return false;
}
/**
* d_namespace_path - lookup a name associated with a given path
* @path: path to lookup (NOT NULL)
* @buf: buffer to store path to (NOT NULL)
* @buflen: length of @buf
* @name: Returns - pointer for start of path name with in @buf (NOT NULL)
* @flags: flags controlling path lookup
*
* Handle path name lookup.
*
* Returns: %0 else error code if path lookup fails
* When no error the path name is returned in @name which points to
* to a position in @buf
*/
static int d_namespace_path(struct path *path, char *buf, int buflen,
char **name, int flags)
{
char *res;
int error = 0;
int connected = 1;
if (path->mnt->mnt_flags & MNT_INTERNAL) {
/* it's not mounted anywhere */
res = dentry_path(path->dentry, buf, buflen);
*name = res;
if (IS_ERR(res)) {
*name = buf;
return PTR_ERR(res);
}
if (path->dentry->d_sb->s_magic == PROC_SUPER_MAGIC &&
strncmp(*name, "/sys/", 5) == 0) {
/* TODO: convert over to using a per namespace
* control instead of hard coded /proc
*/
return prepend(name, *name - buf, "/proc", 5);
}
return 0;
}
/* resolve paths relative to chroot?*/
if (flags & PATH_CHROOT_REL) {
struct path root;
get_fs_root(current->fs, &root);
res = __d_path(path, &root, buf, buflen);
path_put(&root);
} else {
res = d_absolute_path(path, buf, buflen);
if (!our_mnt(path->mnt))
connected = 0;
}
/* handle error conditions - and still allow a partial path to
* be returned.
*/
if (!res || IS_ERR(res)) {
connected = 0;
res = dentry_path_raw(path->dentry, buf, buflen);
if (IS_ERR(res)) {
error = PTR_ERR(res);
*name = buf;
goto out;
};
} else if (!our_mnt(path->mnt))
connected = 0;
*name = res;
/* Handle two cases:
* 1. A deleted dentry && profile is not allowing mediation of deleted
* 2. On some filesystems, newly allocated dentries appear to the
* security_path hooks as a deleted dentry except without an inode
* allocated.
*/
if (d_unlinked(path->dentry) && path->dentry->d_inode &&
!(flags & PATH_MEDIATE_DELETED)) {
error = -ENOENT;
goto out;
}
/* If the path is not connected to the expected root,
* check if it is a sysctl and handle specially else remove any
* leading / that __d_path may have returned.
* Unless
* specifically directed to connect the path,
* OR
* if in a chroot and doing chroot relative paths and the path
* resolves to the namespace root (would be connected outside
* of chroot) and specifically directed to connect paths to
* namespace root.
*/
if (!connected) {
if (!(flags & PATH_CONNECT_PATH) &&
!(((flags & CHROOT_NSCONNECT) == CHROOT_NSCONNECT) &&
our_mnt(path->mnt))) {
/* disconnected path, don't return pathname starting
* with '/'
*/
error = -ESTALE;
if (*res == '/')
*name = res + 1;
}
}
out:
return error;
}
