1 #!/system/bin/sh 2 3 # 4 # Copyright (C) 2015 The Android Open Source Project 5 # 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 9 # 10 # http://www.apache.org/licenses/LICENSE-2.0 11 # 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. 17 # 18 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): 23 24 # AB_OTA_POSTINSTALL_CONFIG += \ 25 # RUN_POSTINSTALL_system=true \ 26 # POSTINSTALL_PATH_system=bin/postinst_example \ 27 # FILESYSTEM_TYPE_system=ext4 \ 28 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. 31 # 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). 42 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. 49 50 target_slot="$1" 51 status_fd="$2" 52 53 my_dir=$(dirname "$0") 54 55 # We can notify the updater of the progress of our program by writing to the 56 # status file descriptor "global_progress <frac>\n". 57 print -u${status_fd} "global_progress 0" 58 59 echo "The output of this program will show up in the logs." >&2 60 61 # We are half way done, so we set 0.5. 62 print -u${status_fd} "global_progress 0.5" 63 64 echo "Note that this program runs from ${my_dir}" 65 66 # Actually, we were done. 67 print -u${status_fd} "global_progress 1.0" 68 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. 71 72 exit 0 73
