blob: 581130a721cf02fe155443e57c8c289793855831 [file] [log] [blame]
// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// A utility to clear the operating system's cache for a file or directory.
//
// USAGE: clear_system_cache [--recurse] <files or directories>
#include <stddef.h>
#include <stdio.h>
#include "base/command_line.h"
#include "base/files/file_enumerator.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/logging.h"
#include "base/test/test_file_util.h"
void ClearCacheForFile(const base::FilePath& path) {
VLOG(1) << "Clearing " << path.MaybeAsASCII();
base::EvictFileFromSystemCache(path);
}
int main(int argc, const char* argv[]) {
base::CommandLine::Init(argc, argv);
const base::CommandLine& parsed_command_line =
*base::CommandLine::ForCurrentProcess();
bool should_recurse = parsed_command_line.HasSwitch("recurse");
const base::CommandLine::StringVector& args = parsed_command_line.GetArgs();
if (args.size() < 1) {
printf("USAGE: %s [--recurse] <files or directories>\n", argv[0]);
return 1;
}
for (size_t i = 0; i < args.size(); ++i) {
base::FilePath path(args[i]);
if (!base::PathExists(path)) {
LOG(ERROR) << "Couldn't find " << path.MaybeAsASCII();
return 1;
}
// Synchronously eliminating the dirty pages from pagecache allows to
// minimize adhoc waiting after all of the per-file pagecache dropping is
// done.
base::SyncPageCacheToDisk();
if (base::DirectoryExists(path)) {
base::FileEnumerator enumerator(path, should_recurse,
base::FileEnumerator::FILES);
for (base::FilePath next = enumerator.Next(); !next.empty();
next = enumerator.Next()) {
ClearCacheForFile(next);
}
} else {
ClearCacheForFile(path);
}
}
return 0;
}