单独编译出来的模块overlay.trout.so push到模拟器的问题

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aopclinux overlay # mm
============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=2.2.1
TARGET_PRODUCT=generic
TARGET_BUILD_VARIANT=eng
TARGET_SIMULATOR=
TARGET_BUILD_TYPE=release
TARGET_BUILD_APPS=
TARGET_ARCH=arm
HOST_ARCH=x86
HOST_OS=linux
HOST_BUILD_TYPE=release
BUILD_ID=MASTER
============================================
make: Entering directory `/work/froyo'
target SharedLib: overlay.trout (out/target/product/generic/obj/SHARED_LIBRARIES/overlay.trout_intermediates/LINKED/overlay.trout.so)
target Non-prelinked: overlay.trout (out/target/product/generic/symbols/system/lib/overlay.trout.so)
target Strip: overlay.trout (out/target/product/generic/obj/lib/overlay.trout.so)
Install: out/target/product/generic/system/lib/hw/overlay.trout.so
make: Leaving directory `/work/froyo'


到/system/lib就有问题
aopclinux overlays # adb push /work/froyo/out/target/product/generic/system/lib/hw/overlay.trout.so /system/lib/overlay.trout.so
failed to copy '/work/froyo/out/target/product/generic/system/lib/hw/overlay.trout.so' to '/system/lib/overlay.trout.so': Read-only file system

到sdcard没有问题
aopclinux overlays # adb push /work/froyo/out/target/product/generic/system/lib/hw/overlay.trout.so /sdcard/overlay.trout.so
105 KB/s (5280 bytes in 0.048s)


问题 1.我杂把 /sdcard/overlay.trout.so拿到/system/lib/overlay.trout.so阿？


下面作不行的
# mv overlay.trout.so /system/lib/overlay.trout.so
failed on 'overlay.trout.so' - Cross-device link
#
#
# cat overlay.trout.so > /system/lib/overlay.trout.so
cannot create /system/lib/overlay.trout.so: read-only file system

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问题搞定！！

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# cat overlay.trout.so > /system/lib/overlay.trout.so
cannot create /system/lib/overlay.trout.so: read-only file system

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问个其他问题：登陆到模拟器的时候我用的是什么用户？
root？？