4 # Copyright (C) 2015 The Android Open Source Project
6 # Licensed under the Apache License, Version 2.0 (the "License");
7 # you may not use this file except in compliance with the License.
8 # You may obtain a copy of the License at
10 # http://www.apache.org/licenses/LICENSE-2.0
12 # Unless required by applicable law or agreed to in writing, software
13 # distributed under the License is distributed on an "AS IS" BASIS,
14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 # See the License for the specific language governing permissions and
16 # limitations under the License.
19 # This is an example post-install script. This script will be executed by the
20 # update_engine right after finishing writing all the partitions, but before
21 # marking the new slot as active. To enable running this program, insert these
22 # lines in your product's .mk file (without the # at the beginning):
24 # AB_OTA_POSTINSTALL_CONFIG += \
25 # RUN_POSTINSTALL_system=true \
26 # POSTINSTALL_PATH_system=bin/postinst_example \
27 # FILESYSTEM_TYPE_system=ext4 \
29 # This script receives no arguments. argv[0] will include the absolute path to
30 # the script, including the directory where the new partition was mounted.
32 # The script will run from the "postinstall" SELinux domain, from the old system
33 # environment (kernel, SELinux rules, etc). New rules and domains introduced by
34 # the new system won't be available when this script runs, instead, all the
35 # files in the mounted directory will have the attribute "postinstall_file". All
36 # the files accessed from here would need to be allowed in the old system or
37 # those accesses will fail. For example, the absolute path used in the first
38 # line of this script (/system/bin/sh) is indeed the old system's sh binary. If
39 # you use a compiled program, you might want to link it statically or use a
40 # wrapper script to use the new ldso to run your program (see the
41 # --generate-wrappers option in lddtree.py for an example).
43 # We get called with two parameters: <target_slot> <status_fd>
44 # * <target_slot> is the slot where the new system was just copied. This is
45 # normally either 0 or 1. You can get the target suffix running
46 # `bootctl get-suffix ${target_slot}`
47 # * <status_fd> is a file descriptor number where this script can write to to
48 # report the progress of the process. See examples below.
53 my_dir=$(dirname "$0")
55 # We can notify the updater of the progress of our program by writing to the
56 # status file descriptor "global_progress <frac>\n".
57 print -u${status_fd} "global_progress 0"
59 echo "The output of this program will show up in the logs." >&2
61 # We are half way done, so we set 0.5.
62 print -u${status_fd} "global_progress 0.5"
64 echo "Note that this program runs from ${my_dir}"
66 # Actually, we were done.
67 print -u${status_fd} "global_progress 1.0"
69 # If the exit code of this program is an error code (different from 0), the
70 # update will fail and the new slot will not be marked as active.