diff options
author | Alex Deymo <deymo@google.com> | 2015-09-21 16:49:23 -0700 |
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committer | Alex Deymo <deymo@google.com> | 2015-09-21 17:40:20 -0700 |
commit | e07875e0b2d502dc1cb310196eb872dd0eb6e9e7 (patch) | |
tree | 0cd871d936b793bfcd562025c9a6e20651de331b /postinst | |
parent | 12f454e24a518d81fe42043b7142582b81694363 (diff) | |
download | extras-e07875e0b2d502dc1cb310196eb872dd0eb6e9e7.tar.gz |
Example /postinst script module for update_engine.
The "post-install" program (normally /system/postinst) is a program
stored in the new system but executed from the old system right before
finishing the update. This post-install step provides a way to perform
device-specific tasks needed for old devices to accept the new update
*before* attempting to boot it.
Currently, we don't require any particular task to be performed in this
step, so this is just an example post-install program with some
documentation. Nevertheless, update_engine payload major version 1
requires a /postinst script in the system partition. While we plan to
use payload major version 2 in Brillo, this patch allows to push images
to the pre-release version of update_engine.
Bug: 24194445
Test: `m` includes /postinst in a Brillo target.
Change-Id: I6397537119873c68e0a626a37137ececcf8f03d5
Diffstat (limited to 'postinst')
-rw-r--r-- | postinst/Android.mk | 30 | ||||
-rw-r--r-- | postinst/MODULE_LICENSE_APACHE2 | 0 | ||||
-rw-r--r-- | postinst/NOTICE | 190 | ||||
-rw-r--r-- | postinst/postinst.sh | 36 |
4 files changed, 256 insertions, 0 deletions
diff --git a/postinst/Android.mk b/postinst/Android.mk new file mode 100644 index 00000000..b0dec050 --- /dev/null +++ b/postinst/Android.mk @@ -0,0 +1,30 @@ +# +# Copyright (C) 2015 The Android Open Source Project +# +# 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. +# + +LOCAL_PATH:= $(call my-dir) + +include $(CLEAR_VARS) +LOCAL_MODULE:= postinst_example +LOCAL_MODULE_TAGS := optional +LOCAL_MODULE_CLASS := EXECUTABLES +LOCAL_SRC_FILES := postinst.sh + +# Create a symlink from /postinst to our default post-install script in the +# same filesystem as /postinst. +# TODO(deymo): Remove this symlink and add the path to the product config. +LOCAL_POST_INSTALL_CMD := \ + $(hide) ln -sf bin/postinst_example $(TARGET_OUT)/postinst +include $(BUILD_PREBUILT) diff --git a/postinst/MODULE_LICENSE_APACHE2 b/postinst/MODULE_LICENSE_APACHE2 new file mode 100644 index 00000000..e69de29b --- /dev/null +++ b/postinst/MODULE_LICENSE_APACHE2 diff --git a/postinst/NOTICE b/postinst/NOTICE new file mode 100644 index 00000000..34bdaf1d --- /dev/null +++ b/postinst/NOTICE @@ -0,0 +1,190 @@ + + Copyright (c) 2005-2015, The Android Open Source Project + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + + 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. + + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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For the purposes + of this License, Derivative Works shall not include works that remain + separable from, or merely link (or bind by name) to the interfaces of, + the Work and Derivative Works thereof. + + "Contribution" shall mean any work of authorship, including + the original version of the Work and any modifications or additions + to that Work or Derivative Works thereof, that is intentionally + submitted to Licensor for inclusion in the Work by the copyright owner + or by an individual or Legal Entity authorized to submit on behalf of + the copyright owner. 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This script will be executed by the +# update_engine right after finishing writing all the partitions, but before +# marking the new slot as active. +# +# This script receives no arguments. argv[0] will include the absolute path to +# the script, including the temporary directory where the new partition was +# mounted. +# +# This script will run in the context of the old kernel and old system. Note +# that the absolute path used in first line of this script (/system/bin/sh) is +# indeed the old system's sh binary. If you use a compiled program, you might +# want to link it statically or use a wrapper script to use the new ldso to run +# your program (see the --generate-wrappers option in lddtree.py for example). +# +# If the exit code of this program is an error code (different from 0), the +# update will fail and the new slot will not be marked as active. + +exit 0 |