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