1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.tradefed.util; 18 19 import com.android.tradefed.log.LogUtil.CLog; 20 21 import java.util.ArrayList; 22 import java.util.List; 23 24 /** 25 * Utility used to parse(USER,PID and NAME) from the "ps" command output 26 */ 27 public class PsParser { 28 29 private static final String LINE_SEPARATOR = "\\n"; 30 private static final String PROCESS_INFO_SEPARATOR = "\\s+"; 31 private static final String BAD_PID = "bad pid '-A'"; 32 33 /** 34 * Parse username, process id and process name from the ps command output and convert to list of 35 * ProcessInfo objects. 36 * 37 * @param psOutput output of "ps" command. 38 * @return list of processInfo 39 */ 40 public static List<ProcessInfo> getProcesses(String psOutput) { 41 42 List<ProcessInfo> processesInfo = new ArrayList<ProcessInfo>(); 43 if (psOutput.isEmpty()) { 44 return processesInfo; 45 } 46 String processLines[] = psOutput.split(LINE_SEPARATOR); 47 48 /* 49 * (ps -A || ps) command prints "bad pid '-A'" as first line before the ps header in 50 * N and older builds so skip the first two lines. 51 */ 52 int startLineNum = 1; 53 if (processLines[0].equals(BAD_PID)) { 54 startLineNum = 2; 55 } 56 57 /* 58 * Sample output: 59 * USER PID PPID VSZ RSS WCHAN PC S NAME 60 * root 1 0 11140 1848 epoll_wait 0 S init 61 * 62 * Not collecting information other than USER,PID and NAME because they are 63 * not always printed for all the processess. 64 */ 65 for (int lineCount = startLineNum; lineCount < processLines.length; lineCount++) { 66 String processInfoStr[] = processLines[lineCount].split(PROCESS_INFO_SEPARATOR); 67 CLog.i(processLines[lineCount]); 68 ProcessInfo psInfo = new ProcessInfo(processInfoStr[0], 69 Integer.parseInt(processInfoStr[1]), processInfoStr[processInfoStr.length - 1]); 70 processesInfo.add(psInfo); 71 } 72 return processesInfo; 73 } 74 75 } 76 77
