aystshen / Android-log2file

Save Android logcat and kernel log to file.

Android-log2file

This library saves Android logcat and kernel logs to a file for easy system debugging.

Usage

1. Copy the log2file directory to vendor/rockchip/common/

shenhb@dqrd01:~/android/vendor/rockchip/common/log2file$ tree
.
├── Android.mk
├── log2file.mk
└── log2file.sh

2. Modify device/rockchip/common/init.rockchip.rc and add the following code:

#log2file
service log2file /system/xbin/log2file.sh
    class late_start
    user root
    group media_rw

3. Modify vendor/rockchip/common/BoardConfigVendor.mk and add the following code:

PRODUCT_HAVE_LOG2FILE ?= true

4. Modify vendor/rockchip/common/device-vendor.mk and add the following code:

ifeq ($(PRODUCT_HAVE_LOG2FILE),true)
$(call inherit-product-if-exists, vendor/rockchip/common/log2file/log2file.mk)
endif

For SEAndroid

1. Modify device/rockchip/common/init.rockchip.rc and add the following code:

#log2file
service log2file /system/xbin/log2file.sh
    class late_start
    user root
    group media_rw
    oneshot

2. Modify device/rockchip/common/sepolicy/file_contexts and add the following code:

# for log2file
/system/xbin/log2file.sh            u:object_r:log2file_exec:s0

3. Modify device/rockchip/common/sepolicy/init.te and add the following code:

domain_trans(init, log2file_exec, log2file)

4. Add device/rockchip/common/sepolicy/log2file.te file.

type log2file, domain, coredomain, mlstrustedsubject;
type log2file_exec, exec_type, vendor_file_type, file_type;
init_daemon_domain(log2file)

Get the log

$ adb pull sdcard/log

shenhb@dqrd01:~/code/log$ tree
.
├── android
│?? ├── android_0.log
│?? ├── android_1.log
│?? └── index.txt
└── kernel
    ├── index.txt
    ├── kernel_0.log
    └── kernel_1.log

• Index.txt records the most recent log count.
• Create a new log file each time you boot or the current file exceeds 20M.
• Up to 10 log files, will be recycled.

Developer

• [e-mail]

License

Copyright 2019 Bob Shen

Licensed under the Apache License, Version 2.0 (the "License"); you may 
not use this file except in compliance with the License. You may obtain 
a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software 
distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 
WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 
License for the specific language governing permissions and limitations 
under the License.