diff options
Diffstat (limited to 'app/src/main/kotlin/org/pacien/tincapp/commands/Executor.kt')
-rw-r--r-- | app/src/main/kotlin/org/pacien/tincapp/commands/Executor.kt | 85 |
1 files changed, 0 insertions, 85 deletions
diff --git a/app/src/main/kotlin/org/pacien/tincapp/commands/Executor.kt b/app/src/main/kotlin/org/pacien/tincapp/commands/Executor.kt deleted file mode 100644 index 29e011f..0000000 --- a/app/src/main/kotlin/org/pacien/tincapp/commands/Executor.kt +++ /dev/null | |||
@@ -1,85 +0,0 @@ | |||
1 | /* | ||
2 | * Tinc App, an Android binding and user interface for the tinc mesh VPN daemon | ||
3 | * Copyright (C) 2017-2018 Pacien TRAN-GIRARD | ||
4 | * | ||
5 | * This program is free software: you can redistribute it and/or modify | ||
6 | * it under the terms of the GNU General Public License as published by | ||
7 | * the Free Software Foundation, either version 3 of the License, or | ||
8 | * (at your option) any later version. | ||
9 | * | ||
10 | * This program is distributed in the hope that it will be useful, | ||
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
13 | * GNU General Public License for more details. | ||
14 | * | ||
15 | * You should have received a copy of the GNU General Public License | ||
16 | * along with this program. If not, see <https://www.gnu.org/licenses/>. | ||
17 | */ | ||
18 | |||
19 | package org.pacien.tincapp.commands | ||
20 | |||
21 | import android.os.AsyncTask | ||
22 | import java8.util.concurrent.CompletableFuture | ||
23 | import java8.util.function.Supplier | ||
24 | import java.io.BufferedReader | ||
25 | import java.io.IOException | ||
26 | import java.io.InputStream | ||
27 | import java.io.InputStreamReader | ||
28 | |||
29 | /** | ||
30 | * @author pacien | ||
31 | */ | ||
32 | internal object Executor { | ||
33 | private const val FAILED = -1 | ||
34 | private const val SUCCESS = 0 | ||
35 | |||
36 | class CommandExecutionException(msg: String) : Exception(msg) | ||
37 | |||
38 | init { | ||
39 | System.loadLibrary("exec") | ||
40 | } | ||
41 | |||
42 | /** | ||
43 | * @return FAILED (-1) on error, forked child PID otherwise | ||
44 | */ | ||
45 | private external fun forkExec(args: Array<String>): Int | ||
46 | |||
47 | /** | ||
48 | * @return FAILED (-1) on error, the exit status of the process otherwise | ||
49 | */ | ||
50 | private external fun wait(pid: Int): Int | ||
51 | |||
52 | private fun read(stream: InputStream) = BufferedReader(InputStreamReader(stream)).readLines() | ||
53 | |||
54 | fun forkExec(cmd: Command): CompletableFuture<Unit> { | ||
55 | val pid = forkExec(cmd.asArray()).also { | ||
56 | if (it == FAILED) throw CommandExecutionException("Could not fork child process.") | ||
57 | } | ||
58 | |||
59 | return runAsyncTask { | ||
60 | val exitCode = wait(pid) | ||
61 | when (exitCode) { | ||
62 | SUCCESS -> Unit | ||
63 | FAILED -> throw CommandExecutionException("Process terminated abnormally.") | ||
64 | else -> throw CommandExecutionException("Non-zero exit status code ($exitCode).") | ||
65 | } | ||
66 | } | ||
67 | } | ||
68 | |||
69 | fun run(cmd: Command): Process = try { | ||
70 | ProcessBuilder(cmd.asList()).start() | ||
71 | } catch (e: IOException) { | ||
72 | throw CommandExecutionException(e.message ?: "Could not start process.") | ||
73 | } | ||
74 | |||
75 | fun call(cmd: Command): CompletableFuture<List<String>> = run(cmd).let { process -> | ||
76 | supplyAsyncTask<List<String>> { | ||
77 | val exitCode = process.waitFor() | ||
78 | if (exitCode == 0) read(process.inputStream) | ||
79 | else throw CommandExecutionException(read(process.errorStream).lastOrNull() ?: "Non-zero exit status ($exitCode).") | ||
80 | } | ||
81 | } | ||
82 | |||
83 | fun runAsyncTask(r: () -> Unit) = CompletableFuture.supplyAsync(Supplier(r), AsyncTask.THREAD_POOL_EXECUTOR)!! | ||
84 | fun <U> supplyAsyncTask(s: () -> U) = CompletableFuture.supplyAsync(Supplier(s), AsyncTask.THREAD_POOL_EXECUTOR)!! | ||
85 | } | ||