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/* -*- 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
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