1 files changed, 70 insertions, 0 deletions
diff --git a/widget/LSBUtils.cpp b/widget/LSBUtils.cpp
new file mode 100644
index 0000000000..bcadddef12
--- /dev/null
+++ b/widget/LSBUtils.cpp
@@ -0,0 +1,70 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "LSBUtils.h"
+
+#include <unistd.h>
+#include "base/process_util.h"
+#include "mozilla/FileUtils.h"
+#include "mozilla/Result.h"
+#include "mozilla/ResultVariant.h"
+#include "mozilla/ipc/LaunchError.h"
+
+namespace mozilla::widget::lsb {
+
+static const char* gLsbReleasePath = "/usr/bin/lsb_release";
+
+bool GetLSBRelease(nsACString& aDistributor, nsACString& aDescription,
+                   nsACString& aRelease, nsACString& aCodename) {
+  if (access(gLsbReleasePath, R_OK) != 0) return false;
+
+  int pipefd[2];
+  if (pipe(pipefd) == -1) {
+    NS_WARNING("pipe() failed!");
+    return false;
+  }
+
+  std::vector<std::string> argv = {gLsbReleasePath, "-idrc"};
+
+  base::LaunchOptions options;
+  options.fds_to_remap.push_back({pipefd[1], STDOUT_FILENO});
+  options.wait = true;
+
+  base::ProcessHandle process;
+  Result<Ok, ipc::LaunchError> err = base::LaunchApp(argv, options, &process);
+  close(pipefd[1]);
+  if (err.isErr()) {
+    NS_WARNING("Failed to spawn lsb_release!");
+    close(pipefd[0]);
+    return false;
+  }
+
+  ScopedCloseFile stream(fdopen(pipefd[0], "r"));
+  if (!stream) {
+    NS_WARNING("Could not wrap fd!");
+    close(pipefd[0]);
+    return false;
+  }
+
+  char dist[256], desc[256], release[256], codename[256];
+  if (fscanf(stream,
+             "Distributor ID:\t%255[^\n]\n"
+             "Description:\t%255[^\n]\n"
+             "Release:\t%255[^\n]\n"
+             "Codename:\t%255[^\n]\n",
+             dist, desc, release, codename) != 4) {
+    NS_WARNING("Failed to parse lsb_release!");
+    return false;
+  }
+
+  aDistributor.Assign(dist);
+  aDescription.Assign(desc);
+  aRelease.Assign(release);
+  aCodename.Assign(codename);
+  return true;
+}
+
+}  // namespace mozilla::widget::lsb