-int sysfs_resolve_link(struct udev *udev, char *devpath, size_t size)
-{
- char link_path[PATH_SIZE];
- char link_target[PATH_SIZE];
- int len;
- int i;
- int back;
-
- util_strlcpy(link_path, udev_get_sys_path(udev), sizeof(link_path));
- util_strlcat(link_path, devpath, sizeof(link_path));
- len = readlink(link_path, link_target, sizeof(link_target));
- if (len <= 0)
- return -1;
- link_target[len] = '\0';
- dbg(udev, "path link '%s' points to '%s'\n", devpath, link_target);
-
- for (back = 0; strncmp(&link_target[back * 3], "../", 3) == 0; back++)
- ;
- dbg(udev, "base '%s', tail '%s', back %i\n", devpath, &link_target[back * 3], back);
- for (i = 0; i <= back; i++) {
- char *pos = strrchr(devpath, '/');
-
- if (pos == NULL)
- return -1;
- pos[0] = '\0';
- }
- dbg(udev, "after moving back '%s'\n", devpath);
- util_strlcat(devpath, "/", size);
- util_strlcat(devpath, &link_target[back * 3], size);
- return 0;
-}
-