1 # update_engine payload application permissions. These are shared between the 2 # background daemon and the recovery tool to sideload an update. 3 4 # Allow update_engine to reach block devices in /dev/block. 5 allow update_engine_common block_device:dir search; 6 7 # Allow read/write on system and boot partitions. 8 allow update_engine_common boot_block_device:blk_file rw_file_perms; 9 allow update_engine_common system_block_device:blk_file rw_file_perms; 10 11 # Allow to set recovery options in the BCB. Used to trigger factory reset when 12 # the update to an older version (channel change) or incompatible version 13 # requires it. 14 allow update_engine_common misc_block_device:blk_file rw_file_perms; 15 16 # Allow update_engine_common to mount on the /postinstall directory and reset the 17 # labels on the mounted filesystem to postinstall_file. 18 allow update_engine_common postinstall_mnt_dir:dir mounton; 19 allow update_engine_common postinstall_file:filesystem { mount unmount relabelfrom relabelto }; 20 allow update_engine_common labeledfs:filesystem relabelfrom; 21 22 # Allow update_engine_common to read and execute postinstall_file. 23 allow update_engine_common postinstall_file:file rx_file_perms; 24 allow update_engine_common postinstall_file:lnk_file r_file_perms; 25 allow update_engine_common postinstall_file:dir r_dir_perms; 26 27 28 # A postinstall program is typically a shell script (with a #!), so we allow 29 # to execute those. 30 allow update_engine_common shell_exec:file rx_file_perms; 31 32 # Allow update_engine_common to suspend, resume and kill the postinstall program. 33 allow update_engine_common postinstall:process { signal sigstop sigkill }; 34 35 # access /proc/misc 36 # Access is also granted to proc:file, but it is likely unneeded 37 # due to the more specific grant to proc_misc immediately below. 38 allow update_engine proc:file r_file_perms; # delete candidate 39 allow update_engine proc_misc:file r_file_perms; 40 41 # read directories on /system and /vendor 42 allow update_engine system_file:dir r_dir_perms; 43
