[Android Q&A, Help & Troubleshooting] hamsam:
there is it

show_progress(0.950000, 50);

ui_print("Flash system...");

format("yaffs2", "MTD", "system");

mount("yaffs2", "MTD", "system", "/system");

package_extract_dir("system", "/system");

symlink("toolbox", "/system/bin/cat", "/system/bin/chmod",

"/system/bin/chown", "/system/bin/cmp", "/system/bin/date",

"/system/bin/dd", "/system/bin/df", "/system/bin/dmesg",

"/system/bin/getevent", "/system/bin/getprop", "/system/bin/hd",

"/system/bin/id", "/system/bin/ifconfig", "/system/bin/iftop",

"/system/bin/insmod", "/system/bin/ioctl", "/system/bin/ionice",

"/system/bin/kill", "/system/bin/ln", "/system/bin/log",

"/system/bin/ls", "/system/bin/lsmod", "/system/bin/lsof",

"/system/bin/mkdir", "/system/bin/mount", "/system/bin/mv",

"/system/bin/nandread", "/system/bin/netstat",

"/system/bin/newfs_msdos", "/system/bin/notify", "/system/bin/printenv",

"/system/bin/ps", "/system/bin/reboot", "/system/bin/renice",

"/system/bin/rm", "/system/bin/rmdir", "/system/bin/rmmod",

"/system/bin/route", "/system/bin/schedtop", "/system/bin/sendevent",

"/system/bin/setconsole", "/system/bin/setprop", "/system/bin/sleep",

"/system/bin/smd", "/system/bin/start", "/system/bin/stop",

"/system/bin/sync", "/system/bin/top", "/system/bin/umount",

"/system/bin/uptime", "/system/bin/vmstat", "/system/bin/watchprops",

"/system/bin/wipe");

package_extract_dir("system_new", "/system");

set_perm_recursive(0, 0, 0755, 0644, "/system");

set_perm_recursive(0, 2000, 0755, 0755, "/system/bin");

set_perm(0, 2000, 04755, "/system/bin/aee");

set_perm(0, 2000, 04755, "/system/bin/check_ota");

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(1002, 1002, 0440, "/system/etc/dbus.conf");

set_perm(1014, 2000, 0550, "/system/etc/dhcpcd/dhcpcd-run-hooks");

set_perm(0, 2000, 0550, "/system/etc/init.goldfish.sh");

set_perm(0, 0, 06755, "/system/bin/su");

symlink("/system/bin/su", "/system/xbin/su");

set_perm(0, 0, 04755, "/system/xbin/busybox");

assert(run_program("/system/xbin/busybox", "--install", "-s", "/system/xbin"));

symlink("/system/xbin/busybox", "/system/bin/busybox");

set_perm_recursive(0, 0, 0755, 0555, "/system/etc/ppp");

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(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.mt6573.so");

set_perm_recursive(0, 2000, 0755, 0755, "/system/xbin");

set_perm(0, 0, 0755, "/system/etc/install-recovery.sh");

show_progress(0.050000, 1);

ui_print("Wipe cache...");

format("yaffs2","MTD", "cache");

ui_print("Wipe dalvik cache...");

mount("yaffs2","MTD", "userdata", "/data");

delete_recursive("/data/dalvik-cache");

ui_print("...Writing boot...");

show_progress(0.950000, 50);

assert(package_extract_file("boot.img", "/tmp/boot.img"),

write_raw_image("/tmp/boot.img", "boot"),

delete("/tmp/boot.img"));

unmount("/data");

unmount("/system");