_root(obj) - phpMan

pam_rootok (8)       - Gain only root access
pivot_root (2)       - change the root filesystem
pivot_root (8)       - change the root filesystem
selinux_policy_root (3) - return the path of the SELinux policy files for thi...
selinux_restorecon_set_alt_rootpath (3) - set an alternate rootpath.
selinux_set_policy_root (3) - return the path of the SELinux policy files for...
switch_root (8)      - switch to another filesystem as the root of the mount ...