fsck.te

# e2fsck or any other fsck program run by init.
type fsck, domain;
type fsck_exec, exec_type, file_type;

init_daemon_domain(fsck)

# /dev/__null__ created by init prior to policy load,
# open fd inherited by fsck.
allow fsck tmpfs:chr_file { read write ioctl };

# Inherit and use pty created by android_fork_execvp_ext().
allow fsck devpts:chr_file { read write ioctl getattr };

# Run e2fsck on block devices.
allow fsck block_device:dir search;
allow fsck userdata_block_device:blk_file rw_file_perms;
allow fsck cache_block_device:blk_file rw_file_perms;

# Only allow entry from init via the e2fsck binary.
neverallow { domain -init } fsck:process transition;
neverallow domain fsck:process dyntransition;
neverallow fsck { file_type fs_type -fsck_exec}:file entrypoint;