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2b408e85 AM |
1 | /* |
2 | * Copyright (C) 2015, EfficiOS Inc., Alexandre Montplaisir <alexmonthy@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along | |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | */ | |
18 | ||
b01fe762 | 19 | package org.lttng.ust.agent.utils; |
8576633f | 20 | |
8576633f AM |
21 | import java.util.Arrays; |
22 | import java.util.List; | |
23 | ||
45d1768c AM |
24 | import org.lttng.tools.ILttngSession; |
25 | import org.lttng.tools.ILttngSession.Domain; | |
b01fe762 | 26 | import org.lttng.tools.utils.ShellUtils; |
8576633f AM |
27 | |
28 | /** | |
45d1768c AM |
29 | * Utility methods to test the presence of certain LTTng tools or libraries in |
30 | * the runtime environment. | |
8576633f | 31 | */ |
45d1768c | 32 | public final class LttngUtils { |
8576633f | 33 | |
45d1768c | 34 | private LttngUtils() {} |
8576633f | 35 | |
8576633f AM |
36 | /** |
37 | * Check that lttng-tools and babeltrace are installed on the system and | |
38 | * working. | |
39 | * | |
40 | * @param domain | |
41 | * The tracing domain to test for (we will try to setup a session | |
42 | * with this domain) | |
43 | * @return True if the environment should allow tracing fine, false if there | |
44 | * was an error | |
45 | */ | |
46 | public static boolean checkForLttngTools(Domain domain) { | |
ff620bef | 47 | try (ILttngSession session = ILttngSession.createSession(null, domain)) { |
8576633f AM |
48 | boolean ret1 = session.enableAllEvents(); |
49 | boolean ret2 = session.start(); | |
50 | boolean ret3 = session.stop(); | |
51 | /* | |
52 | * "lttng view" also tests that Babeltrace is installed and working | |
53 | */ | |
54 | List<String> contents = session.view(); | |
55 | return (ret1 && ret2 && ret3 && contents.isEmpty()); | |
56 | } | |
57 | } | |
58 | ||
8a0613fa AM |
59 | /** |
60 | * Check if there is a user session daemon currently running on the system. | |
61 | * It needs to be of the same user as the application running this program. | |
62 | * | |
63 | * @return If there is a user session daemon currently running | |
64 | */ | |
8576633f AM |
65 | public static boolean checkForUserSessiond() { |
66 | String userName = System.getProperty("user.name"); | |
67 | ||
68 | /* The user name is truncated to 7 characters in "ps" */ | |
69 | String shortUserName = userName.substring(0, Math.min(userName.length(), 7)); | |
70 | ||
71 | List<String> command = Arrays.asList("ps", "-e", "u"); | |
7dfd1adf | 72 | List<String> output = ShellUtils.getOutputFromCommand(false, command); |
8576633f AM |
73 | return output.stream() |
74 | .filter(s -> s.contains("lttng-sessiond")) | |
75 | .anyMatch(s -> s.startsWith(shortUserName)); | |
76 | } | |
77 | ||
8a0613fa AM |
78 | /** |
79 | * Check if there is a root user session daemon daemon currently running on | |
80 | * the system. | |
81 | * | |
82 | * @return If there is a root session daemon currently running | |
83 | */ | |
8576633f AM |
84 | public static boolean checkForRootSessiond() { |
85 | List<String> command = Arrays.asList("ps", "-e", "u"); | |
7dfd1adf | 86 | List<String> output = ShellUtils.getOutputFromCommand(false, command); |
8576633f AM |
87 | return output.stream() |
88 | .filter(s -> s.contains("lttng-sessiond")) | |
89 | .anyMatch(s -> s.startsWith("root")); | |
90 | } | |
91 | ||
8576633f | 92 | } |