int truncate(const char *path, off_t length) {
struct path node;
int res;
if (0 == (res = fs_perm_lookup(path, NULL, &node))) {
errno = -res;
res = -1;
goto end;
}
res = ktruncate(node.node, length);
end:
return res;
}
int kftruncate(struct file_desc *desc, off_t length) {
int ret;
ret = ktruncate(desc->node, length);
if (0 > ret) {
/* XXX ktruncate sets errno */
return -errno;
}
if (desc->cursor > length) {
desc->cursor = length;
}
return 0;
}