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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/updater/activity_impl.h"
#include <fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string>
#include <vector>
#include "base/files/file.h"
#include "base/files/file_util.h"
#include "base/files/scoped_file.h"
#include "base/logging.h"
#include "base/posix/eintr_wrapper.h"
#include "base/ranges/algorithm.h"
#include "chrome/updater/activity_impl_util_posix.h"
namespace updater {
enum class UpdaterScope;
void ClearActiveBit(const base::FilePath& home_dir, const std::string& id) {
struct stat home_buffer = {0};
if (stat(home_dir.value().c_str(), &home_buffer)) {
VPLOG(2) << "Failed to stat " << home_dir;
return;
}
const base::FilePath active_file_path = GetActiveFile(home_dir, id);
const base::ScopedFD dir_fd(
HANDLE_EINTR(open(active_file_path.DirName().value().c_str(), O_RDONLY)));
if (!dir_fd.is_valid()) {
return;
}
struct stat active_file_buffer = {0};
if (fstatat(dir_fd.get(), active_file_path.BaseName().value().c_str(),
&active_file_buffer, AT_SYMLINK_NOFOLLOW)) {
return;
}
if (active_file_buffer.st_uid != home_buffer.st_uid) {
return;
}
unlinkat(dir_fd.get(), active_file_path.BaseName().value().c_str(), 0);
}
bool GetActiveBit(UpdaterScope scope, const std::string& id) {
return base::ranges::any_of(
GetHomeDirPaths(scope), [&id](const base::FilePath& path) {
const base::FilePath& active_file = GetActiveFile(path, id);
return base::PathExists(active_file) &&
base::PathIsWritable(active_file);
});
}
void ClearActiveBit(UpdaterScope scope, const std::string& id) {
for (const base::FilePath& home_dir : GetHomeDirPaths(scope)) {
ClearActiveBit(home_dir, id);
}
}
} // namespace updater
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