1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 #include "LSBUtils.h"
8
9 #include <unistd.h>
10 #include "base/process_util.h"
11 #include "mozilla/FileUtils.h"
12
13 namespace mozilla::widget::lsb {
14
15 static const char* gLsbReleasePath = "/usr/bin/lsb_release";
16
GetLSBRelease(nsACString & aDistributor,nsACString & aDescription,nsACString & aRelease,nsACString & aCodename)17 bool GetLSBRelease(nsACString& aDistributor, nsACString& aDescription,
18 nsACString& aRelease, nsACString& aCodename) {
19 if (access(gLsbReleasePath, R_OK) != 0) return false;
20
21 int pipefd[2];
22 if (pipe(pipefd) == -1) {
23 NS_WARNING("pipe() failed!");
24 return false;
25 }
26
27 std::vector<std::string> argv = {gLsbReleasePath, "-idrc"};
28
29 base::LaunchOptions options;
30 options.fds_to_remap.push_back({pipefd[1], STDOUT_FILENO});
31 options.wait = true;
32
33 base::ProcessHandle process;
34 bool ok = base::LaunchApp(argv, options, &process);
35 close(pipefd[1]);
36 if (!ok) {
37 NS_WARNING("Failed to spawn lsb_release!");
38 close(pipefd[0]);
39 return false;
40 }
41
42 ScopedCloseFile stream(fdopen(pipefd[0], "r"));
43 if (!stream) {
44 NS_WARNING("Could not wrap fd!");
45 close(pipefd[0]);
46 return false;
47 }
48
49 char dist[256], desc[256], release[256], codename[256];
50 if (fscanf(stream,
51 "Distributor ID:\t%255[^\n]\n"
52 "Description:\t%255[^\n]\n"
53 "Release:\t%255[^\n]\n"
54 "Codename:\t%255[^\n]\n",
55 dist, desc, release, codename) != 4) {
56 NS_WARNING("Failed to parse lsb_release!");
57 return false;
58 }
59
60 aDistributor.Assign(dist);
61 aDescription.Assign(desc);
62 aRelease.Assign(release);
63 aCodename.Assign(codename);
64 return true;
65 }
66
67 } // namespace mozilla::widget::lsb
68