[Q] Help! please check my updater-script

show_progress(0.500000, 0);
format("ext4", "EMMC", "/dev/block/mmcblk0p3", "0", "/custpack");
format("ext4", "EMMC", "/dev/block/mmcblk0p5", "0", "/system");
mount("ext4", "EMMC", "/dev/block/mmcblk0p3", "/custpack");
mount("ext4", "EMMC", "/dev/block/mmcblk0p5", "/system");
package_extract_dir("custpack", "/custpack");
package_extract_dir("system", "/system");
symlink("aee_aed", "/system/bin/debuggerd");
symlink("mksh", "/system/bin/sh");
symlink("toolbox", "/system/bin/cat");
symlink("toolbox", "/system/bin/chmod");
symlink("toolbox", "/system/bin/chown");
symlink("toolbox", "/system/bin/cmp");
symlink("toolbox", "/system/bin/date");
symlink("toolbox", "/system/bin/dd");
symlink("toolbox", "/system/bin/df");
symlink("toolbox", "/system/bin/dmesg");
symlink("toolbox", "/system/bin/getevent");
symlink("toolbox", "/system/bin/getprop");
symlink("toolbox", "/system/bin/hd");
symlink("toolbox", "/system/bin/id");
symlink("toolbox", "/system/bin/ifconfig");
symlink("toolbox", "/system/bin/iftop");
symlink("toolbox", "/system/bin/insmod");
symlink("toolbox", "/system/bin/ioctl");
symlink("toolbox", "/system/bin/ionice");
symlink("toolbox", "/system/bin/kill");
symlink("toolbox", "/system/bin/ln");
symlink("toolbox", "/system/bin/log");
symlink("toolbox", "/system/bin/ls");
symlink("toolbox", "/system/bin/lsmod");
symlink("toolbox", "/system/bin/lsof");
symlink("toolbox", "/system/bin/md5");
symlink("toolbox", "/system/bin/mkdir");
symlink("toolbox", "/system/bin/mount");
symlink("toolbox", "/system/bin/mv");
symlink("toolbox", "/system/bin/nandread");
symlink("toolbox", "/system/bin/netstat");
symlink("toolbox", "/system/bin/newfs_msdos");
symlink("toolbox", "/system/bin/notify");
symlink("toolbox", "/system/bin/printenv");
symlink("toolbox", "/system/bin/ps");
symlink("toolbox", "/system/bin/reboot");
symlink("toolbox", "/system/bin/renice");
symlink("toolbox", "/system/bin/rm");
symlink("toolbox", "/system/bin/rmdir");
symlink("toolbox", "/system/bin/rmmod");
symlink("toolbox", "/system/bin/route");
symlink("toolbox", "/system/bin/schedtop");
symlink("toolbox", "/system/bin/sendevent");
symlink("toolbox", "/system/bin/setconsole");
symlink("toolbox", "/system/bin/setprop");
symlink("toolbox", "/system/bin/sleep");
symlink("toolbox", "/system/bin/smd");
symlink("toolbox", "/system/bin/start");
symlink("toolbox", "/system/bin/stop");
symlink("toolbox", "/system/bin/sync");
symlink("toolbox", "/system/bin/top");
symlink("toolbox", "/system/bin/touch");
symlink("toolbox", "/system/bin/umount");
symlink("toolbox", "/system/bin/uptime");
symlink("toolbox", "/system/bin/vmstat");
symlink("toolbox", "/system/bin/watchprops");
symlink("toolbox", "/system/bin/wipe");
symlink("busybox", "/system/xbin/[");
symlink("busybox", "/system/xbin/[[");
symlink("busybox", "/system/xbin/ash");
symlink("busybox", "/system/xbin/awk");
symlink("busybox", "/system/xbin/base64");
symlink("busybox", "/system/xbin/basename");
symlink("busybox", "/system/xbin/blkid");
symlink("busybox", "/system/xbin/bunzip2");
symlink("busybox", "/system/xbin/bzcat");
symlink("busybox", "/system/xbin/bzip2");
symlink("busybox", "/system/xbin/cal");
symlink("busybox", "/system/xbin/cat");
symlink("busybox", "/system/xbin/chat");
symlink("busybox", "/system/xbin/chattr");
symlink("busybox", "/system/xbin/chgrp");
symlink("busybox", "/system/xbin/chmod");
symlink("busybox", "/system/xbin/chown");
symlink("busybox", "/system/xbin/chroot");
symlink("busybox", "/system/xbin/chrt");
symlink("busybox", "/system/xbin/cksum");
symlink("busybox", "/system/xbin/clear");
symlink("busybox", "/system/xbin/comm");
symlink("busybox", "/system/xbin/cp");
symlink("busybox", "/system/xbin/crond");
symlink("busybox", "/system/xbin/crontab");
symlink("busybox", "/system/xbin/cut");
symlink("busybox", "/system/xbin/date");
symlink("busybox", "/system/xbin/dd");
symlink("busybox", "/system/xbin/depmod");
symlink("busybox", "/system/xbin/devmem");
symlink("busybox", "/system/xbin/df");
symlink("busybox", "/system/xbin/diff");
symlink("busybox", "/system/xbin/dirname");
symlink("busybox", "/system/xbin/dmesg");
symlink("busybox", "/system/xbin/dnsd");
symlink("busybox", "/system/xbin/dnsdomainname");
symlink("busybox", "/system/xbin/dos2unix");
symlink("busybox", "/system/xbin/du");
symlink("busybox", "/system/xbin/echo");
symlink("busybox", "/system/xbin/egrep");
symlink("busybox", "/system/xbin/env");
symlink("busybox", "/system/xbin/ether-wake");
symlink("busybox", "/system/xbin/expand");
symlink("busybox", "/system/xbin/expr");
symlink("busybox", "/system/xbin/fakeidentd");
symlink("busybox", "/system/xbin/fbset");
symlink("busybox", "/system/xbin/fdflush");
symlink("busybox", "/system/xbin/fdformat");
symlink("busybox", "/system/xbin/fdisk");
symlink("busybox", "/system/xbin/fgrep");
symlink("busybox", "/system/xbin/find");
symlink("busybox", "/system/xbin/fold");
symlink("busybox", "/system/xbin/free");
symlink("busybox", "/system/xbin/freeramdisk");
symlink("busybox", "/system/xbin/fsck");
symlink("busybox", "/system/xbin/fsync");
symlink("busybox", "/system/xbin/ftpd");
symlink("busybox", "/system/xbin/ftpget");
symlink("busybox", "/system/xbin/ftpput");
symlink("busybox", "/system/xbin/fuser");
symlink("busybox", "/system/xbin/getopt");
symlink("busybox", "/system/xbin/grep");
symlink("busybox", "/system/xbin/groups");
symlink("busybox", "/system/xbin/gunzip");
symlink("busybox", "/system/xbin/gzip");
symlink("busybox", "/system/xbin/hd");
symlink("busybox", "/system/xbin/head");
symlink("busybox", "/system/xbin/hexdump");
symlink("busybox", "/system/xbin/hostid");
symlink("busybox", "/system/xbin/hostname");
symlink("busybox", "/system/xbin/httpd");
symlink("busybox", "/system/xbin/hwclock");
symlink("busybox", "/system/xbin/id");
symlink("busybox", "/system/xbin/ifconfig");
symlink("busybox", "/system/xbin/ifenslave");
symlink("busybox", "/system/xbin/inetd");
symlink("busybox", "/system/xbin/inotifyd");
symlink("busybox", "/system/xbin/insmod");
symlink("busybox", "/system/xbin/install");
symlink("busybox", "/system/xbin/ionice");
symlink("busybox", "/system/xbin/iostat");
symlink("busybox", "/system/xbin/ip");
symlink("busybox", "/system/xbin/ipaddr");
symlink("busybox", "/system/xbin/ipcalc");
symlink("busybox", "/system/xbin/iplink");
symlink("busybox", "/system/xbin/iproute");
symlink("busybox", "/system/xbin/iprule");
symlink("busybox", "/system/xbin/iptunnel");
symlink("busybox", "/system/xbin/kill");
symlink("busybox", "/system/xbin/killall");
symlink("busybox", "/system/xbin/killall5");
symlink("busybox", "/system/xbin/less");
symlink("busybox", "/system/xbin/ln");
symlink("busybox", "/system/xbin/logname");
symlink("busybox", "/system/xbin/losetup");
symlink("busybox", "/system/xbin/ls");
symlink("busybox", "/system/xbin/lsattr");
symlink("busybox", "/system/xbin/lsmod");
symlink("busybox", "/system/xbin/lsof");
symlink("busybox", "/system/xbin/lsusb");
symlink("busybox", "/system/xbin/lzop");
symlink("busybox", "/system/xbin/lzopcat");
symlink("busybox", "/system/xbin/md5sum");
symlink("busybox", "/system/xbin/microcom");
symlink("busybox", "/system/xbin/mkdir");
symlink("busybox", "/system/xbin/mkdosfs");
symlink("busybox", "/system/xbin/mke2fs");
symlink("busybox", "/system/xbin/mkfifo");
symlink("busybox", "/system/xbin/mkfs.ext2");
symlink("busybox", "/system/xbin/mkfs.vfat");
symlink("busybox", "/system/xbin/mknod");
symlink("busybox", "/system/xbin/mkswap");
symlink("busybox", "/system/xbin/modinfo");
symlink("busybox", "/system/xbin/modprobe");
symlink("busybox", "/system/xbin/more");
symlink("busybox", "/system/xbin/mount");
symlink("busybox", "/system/xbin/mountpoint");
symlink("busybox", "/system/xbin/mt");
symlink("busybox", "/system/xbin/mv");
symlink("busybox", "/system/xbin/nameif");
symlink("busybox", "/system/xbin/nanddump");
symlink("busybox", "/system/xbin/nandwrite");
symlink("busybox", "/system/xbin/nc");
symlink("busybox", "/system/xbin/netstat");
symlink("busybox", "/system/xbin/nice");
symlink("busybox", "/system/xbin/nmeter");
symlink("busybox", "/system/xbin/nohup");
symlink("busybox", "/system/xbin/nslookup");
symlink("busybox", "/system/xbin/ntpd");
symlink("busybox", "/system/xbin/od");
symlink("busybox", "/system/xbin/patch");
symlink("busybox", "/system/xbin/pgrep");
symlink("busybox", "/system/xbin/pidof");
symlink("busybox", "/system/xbin/ping");
symlink("busybox", "/system/xbin/ping6");
symlink("busybox", "/system/xbin/pkill");
symlink("busybox", "/system/xbin/pmap");
symlink("busybox", "/system/xbin/powertop");
symlink("busybox", "/system/xbin/printenv");
symlink("busybox", "/system/xbin/printf");
symlink("busybox", "/system/xbin/ps");
symlink("busybox", "/system/xbin/pscan");
symlink("busybox", "/system/xbin/pwd");
symlink("busybox", "/system/xbin/rdate");
symlink("busybox", "/system/xbin/rdev");
symlink("busybox", "/system/xbin/readahead");
symlink("busybox", "/system/xbin/readlink");
symlink("busybox", "/system/xbin/realpath");
symlink("busybox", "/system/xbin/renice");
symlink("busybox", "/system/xbin/reset");
symlink("busybox", "/system/xbin/rev");
symlink("busybox", "/system/xbin/rfkill");
symlink("busybox", "/system/xbin/rm");
symlink("busybox", "/system/xbin/rmdir");
symlink("busybox", "/system/xbin/rmmod");
symlink("busybox", "/system/xbin/route");
symlink("busybox", "/system/xbin/run-parts");
symlink("busybox", "/system/xbin/script");
symlink("busybox", "/system/xbin/scriptreplay");
symlink("busybox", "/system/xbin/sed");
symlink("busybox", "/system/xbin/seq");
symlink("busybox", "/system/xbin/setkeycodes");
symlink("busybox", "/system/xbin/setlogcons");
symlink("busybox", "/system/xbin/setsid");
symlink("busybox", "/system/xbin/sha1sum");
symlink("busybox", "/system/xbin/sha256sum");
symlink("busybox", "/system/xbin/sha3sum");
symlink("busybox", "/system/xbin/sha512sum");
symlink("busybox", "/system/xbin/showkey");
symlink("busybox", "/system/xbin/sleep");
symlink("busybox", "/system/xbin/smemcap");
symlink("busybox", "/system/xbin/sort");
symlink("busybox", "/system/xbin/split");
symlink("busybox", "/system/xbin/start-stop-daemon");
symlink("busybox", "/system/xbin/stat");
symlink("busybox", "/system/xbin/strings");
symlink("busybox", "/system/xbin/stty");
symlink("busybox", "/system/xbin/sum");
symlink("busybox", "/system/xbin/swapoff");
symlink("busybox", "/system/xbin/swapon");
symlink("busybox", "/system/xbin/sync");
symlink("busybox", "/system/xbin/sysctl");
symlink("busybox", "/system/xbin/tac");
symlink("busybox", "/system/xbin/tail");
symlink("busybox", "/system/xbin/tar");
symlink("busybox", "/system/xbin/tee");
symlink("busybox", "/system/xbin/telnet");
symlink("busybox", "/system/xbin/telnetd");
symlink("busybox", "/system/xbin/test");
symlink("busybox", "/system/xbin/tftp");
symlink("busybox", "/system/xbin/tftpd");
symlink("busybox", "/system/xbin/time");
symlink("busybox", "/system/xbin/timeout");
symlink("busybox", "/system/xbin/top");
symlink("busybox", "/system/xbin/touch");
symlink("busybox", "/system/xbin/tr");
symlink("busybox", "/system/xbin/traceroute");
symlink("busybox", "/system/xbin/traceroute6");
symlink("busybox", "/system/xbin/tty");
symlink("busybox", "/system/xbin/ttysize");
symlink("busybox", "/system/xbin/tunctl");
symlink("busybox", "/system/xbin/umount");
symlink("busybox", "/system/xbin/uname");
symlink("busybox", "/system/xbin/uncompress");
symlink("busybox", "/system/xbin/unexpand");
symlink("busybox", "/system/xbin/uniq");
symlink("busybox", "/system/xbin/unix2dos");
symlink("busybox", "/system/xbin/unlzop");
symlink("busybox", "/system/xbin/unzip");
symlink("busybox", "/system/xbin/uptime");
symlink("busybox", "/system/xbin/usleep");
symlink("busybox", "/system/xbin/uudecode");
symlink("busybox", "/system/xbin/uuencode");
symlink("busybox", "/system/xbin/vconfig");
symlink("busybox", "/system/xbin/vi");
symlink("busybox", "/system/xbin/watch");
symlink("busybox", "/system/xbin/wc");
symlink("busybox", "/system/xbin/wget");
symlink("busybox", "/system/xbin/which");
symlink("busybox", "/system/xbin/who");
symlink("busybox", "/system/xbin/whoami");
symlink("busybox", "/system/xbin/whois");
symlink("busybox", "/system/xbin/xargs");
symlink("busybox", "/system/xbin/zcat");
symlink("/custpack/modem/modem.img", "/system/etc/firmware/modem.img");
symlink("/custpack/agps_profiles_conf.xml", "/system/etc/agps_profiles_conf.xml");
symlink("/custpack/apns-conf.xml", "/system/etc/apns-conf.xml");
symlink("/custpack/JRD_custres/fonts", "/system/fonts");
symlink("/custpack/framework/framework-res.apk", "/system/framework/framework-res.apk");
symlink("/custpack/framework/Jrdshared.apk", "/system/framework/Jrdshared.apk");
symlink("/custpack/framework/mediatek-res.apk", "/system/framework/mediatek-res.apk");
symlink("wlan_mt6628.ko", "/system/lib/modules/wlan.ko");
symlink("/custpack/JRD_custres/audio", "/system/media/audio");
symlink("/custpack/boot_logo", "/system/media/images/boot_logo");
symlink("/custpack/build.prop", "/system/build.prop");
set_perm_recursive(0, 0, 0755, 0644, "/custpack");
set_perm_recursive(0, 0, 0755, 0644, "/system");
set_perm_recursive(0, 2000, 0755, 0755, "/system/bin");
set_perm(0, 3003, 02750, "/system/bin/netcfg");
set_perm(0, 3004, 02755, "/system/bin/ping");
set_perm(0, 2000, 06750, "/system/bin/run-as");
set_perm_recursive(1002, 1002, 0755, 0440, "/system/etc/bluetooth");
set_perm(0, 0, 0755, "/system/etc/bluetooth");
set_perm(1000, 1000, 0640, "/system/etc/bluetooth/auto_pairing.conf");
set_perm(3002, 3002, 0444, "/system/etc/bluetooth/blacklist.conf");
set_perm(1014, 2000, 0550, "/system/etc/dhcpcd/dhcpcd-run-hooks");
set_perm_recursive(0, 0, 0755, 0555, "/system/etc/ppp");
set_perm(1002, 1002, 0440, "/system/etc/dbus.conf");
set_perm(0, 2000, 0550, "/system/etc/init.goldfish.sh");
set_perm(0, 2000, 0755, "/system/vendor");
set_perm_recursive(0, 2000, 0755, 0755, "/system/vendor/bin");
set_perm(0, 2000, 0755, "/system/vendor/lib");
set_perm_recursive(0, 2000, 0755, 0644, "/system/vendor/lib/drm");
set_perm(0, 0, 0644, "/system/vendor/lib/drm/libdrmwvmplugin.so");
set_perm(0, 2000, 0755, "/system/vendor/lib/egl");
set_perm_recursive(0, 2000, 0755, 0644, "/system/vendor/lib/hw");
set_perm(0, 0, 0644, "/system/vendor/lib/hw/gralloc.mt6575.so");
set_perm_recursive(0, 0, 0755, 0755, "/system/vendor/pittpatt");
set_perm_recursive(0, 2000, 0755, 0755, "/system/xbin");
set_perm(0, 0, 06755, "/system/xbin/su");
show_progress(0.200000, 0);
show_progress(0.200000, 10);
assert(package_extract_file("boot.img", "/tmp/boot.img"),
       write_raw_image("/tmp/boot.img", "bootimg"),
       delete("/tmp/boot.img"));
show_progress(0.100000, 0);
unmount("/custpack");
unmount("/system");