ifelse(is_mounted("/system"), unmount("/system"));
ifelse(is_mounted("/vendor"), unmount("/vendor"));
mount("ext4", "EMMC", "/dev/block/bootdevice/by-name/system", "/system");
mount("ext4", "EMMC", "/dev/block/bootdevice/by-name/vendor", "/vendor");

package_extract_file("post_install.sh", "/tmp/post_install.sh");
set_perm(0, 2000, 0755, "/tmp/post_install.sh");
run_program("/sbin/sh", "/tmp/post_install.sh");

unmount("/system");
unmount("/vendor");