blob: 5e85604e9abc3a97d1097a8ca6c2b093c6dfeccd [file] [log] [blame]
# Copyright (C) 2010 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.
#
# Extract the pid of a given package name. This assumes that the
# input is the product of 'adb shell ps' with all \r\n line endings
# converted to \n, and that the PACKAGE variable has been initialized
# to the package's name. In other words, this should be used as:
#
# adb shell ps | awk -f <this-script> -v PACKAGE=<name>
#
# The printed value will be 0 if the package is not found.
#
BEGIN {
FS=" "
# A default package name, used _only_ for unit-testing
# com.google.android.apps.maps is interesting because
# in our unit test input files, 'ps' lists several sub-processes
# that implement services (e.g. com.google.android.apps.maps:<something>)
# and we explicitely don't want to match them.
#
if (PACKAGE == "") {
PACKAGE="com.google.android.apps.maps"
}
PID=0
# The default column where we expect the PID to appear, this
# matches the default Android toolbox 'ps', but some devices seem
# to have a different version installed (e.g. Busybox) that place
# it somewhere else. We will probe the output to detect this, but
# this is a good fallback value.
PID_COLUMN=2
}
{
# First, remove any trailing \r from the input line. This is important
# because the output of "adb shell <cmd>" seems to use \r\n line ending.
gsub("\r","",$NF)
if (NR == 1) {
# The first line of the 'ps' output should list the columns, so we're going
# to parse it to try to update PID_COLUMN
for (n = 1; n <= NF; n++) {
if ($n == "PID") {
PID_COLUMN=n;
}
}
} else {
# Not the first line, compare the package name, which shall always
# be the last field.
if ($NF == PACKAGE) {
PID=$PID_COLUMN
}
}
}
END {
print PID
}