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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <sys/stat.h>
#include <sys/types.h>
#include <errno.h>
#include <set>
#include <string>
#include <vector>
#include "base/string_util.h"
#include <gtest/gtest.h>
#include "update_engine/delta_diff_generator.h"
#include "update_engine/filesystem_iterator.h"
#include "update_engine/install_action.h"
#include "update_engine/test_utils.h"
#include "update_engine/utils.h"
using chromeos_update_engine::System;
using std::set;
using std::string;
using std::vector;
namespace {
void GenerateFilesAtPath(const string& base) {
EXPECT_EQ(0, System(StringPrintf("echo hi > %s/hi", base.c_str())));
EXPECT_EQ(0, System(StringPrintf("mkdir -p %s/dir", base.c_str())));
EXPECT_EQ(0, System(StringPrintf("echo hello > %s/dir/hello", base.c_str())));
EXPECT_EQ(0, System(StringPrintf("echo -n > %s/dir/newempty", base.c_str())));
EXPECT_EQ(0, System(StringPrintf("rm -f %s/dir/bdev", base.c_str())));
EXPECT_EQ(0, System(StringPrintf("mknod %s/dir/bdev b 3 1", base.c_str())));
EXPECT_EQ(0, System(StringPrintf("rm -f %s/cdev", base.c_str())));
EXPECT_EQ(0, System(StringPrintf("mknod %s/cdev c 2 1", base.c_str())));
EXPECT_EQ(0, System(StringPrintf("mkdir -p %s/dir/subdir", base.c_str())));
EXPECT_EQ(0, System(StringPrintf("mkdir -p %s/dir/emptydir", base.c_str())));
EXPECT_EQ(0, System(StringPrintf("echo -n foo > %s/dir/bigfile",
base.c_str())));
EXPECT_EQ(0, System(StringPrintf("chown 501:503 %s/dir/emptydir",
base.c_str())));
EXPECT_EQ(0, System(StringPrintf("rm -f %s/dir/subdir/fifo", base.c_str())));
EXPECT_EQ(0, System(StringPrintf("mkfifo %s/dir/subdir/fifo", base.c_str())));
EXPECT_EQ(0, System(StringPrintf("ln -f -s /target %s/dir/subdir/link",
base.c_str())));
}
// Returns true if files at paths a, b are equal and there are no errors.
bool FilesEqual(const string& a, const string& b) {
struct stat a_stbuf;
struct stat b_stbuf;
int r = lstat(a.c_str(), &a_stbuf);
TEST_AND_RETURN_FALSE_ERRNO(r == 0);
r = lstat(b.c_str(), &b_stbuf);
TEST_AND_RETURN_FALSE_ERRNO(r == 0);
TEST_AND_RETURN_FALSE(a_stbuf.st_mode == b_stbuf.st_mode);
if (S_ISBLK(a_stbuf.st_mode) || S_ISCHR(a_stbuf.st_mode))
TEST_AND_RETURN_FALSE(a_stbuf.st_rdev == b_stbuf.st_rdev);
if (!S_ISREG(a_stbuf.st_mode)) {
return true;
}
// Compare files
TEST_AND_RETURN_FALSE(a_stbuf.st_size == b_stbuf.st_size);
vector<char> a_data;
TEST_AND_RETURN_FALSE(chromeos_update_engine::utils::ReadFile(a, &a_data));
vector<char> b_data;
TEST_AND_RETURN_FALSE(chromeos_update_engine::utils::ReadFile(b, &b_data));
TEST_AND_RETURN_FALSE(a_data == b_data);
return true;
}
class ScopedLoopDevUnmapper {
public:
explicit ScopedLoopDevUnmapper(const string& dev) : dev_(dev) {}
~ScopedLoopDevUnmapper() {
EXPECT_EQ(0, System(string("losetup -d ") + dev_));
}
private:
string dev_;
};
}
namespace chromeos_update_engine {
class InstallActionTest : public ::testing::Test { };
TEST(InstallActionTest, RunAsRootDiffTest) {
ASSERT_EQ(0, getuid());
string loop_dev = GetUnusedLoopDevice();
ScopedLoopDevUnmapper loop_dev_unmapper(loop_dev);
LOG(INFO) << "Using loop device: " << loop_dev;
const string original_image("orig.image");
const string original_dir("orig");
const string new_dir("new");
ASSERT_EQ(0, System(string("dd if=/dev/zero of=") + original_image +
" bs=5M count=1"));
ASSERT_EQ(0, System(string("mkfs.ext3 -F ") + original_image));
ASSERT_EQ(0, System(string("losetup ") + loop_dev + " " + original_image));
ASSERT_EQ(0, System(string("mkdir ") + original_dir));
ASSERT_EQ(0, System(string("mount ") + loop_dev + " " + original_dir));
ASSERT_EQ(0, System(string("mkdir ") + new_dir));
GenerateFilesAtPath(original_dir);
GenerateFilesAtPath(new_dir);
{
// Fill bigfile w/ some data in the new folder
vector<char> buf(100 * 1024);
for (unsigned int i = 0; i < buf.size(); i++) {
buf[i] = static_cast<char>(i);
}
EXPECT_TRUE(WriteFileVector(new_dir + "/dir/bigfile", buf));
}
// Make a diff
DeltaArchiveManifest* delta =
DeltaDiffGenerator::EncodeMetadataToProtoBuffer(new_dir.c_str());
EXPECT_TRUE(NULL != delta);
EXPECT_TRUE(DeltaDiffGenerator::EncodeDataToDeltaFile(delta,
original_dir,
new_dir,
"delta"));
ASSERT_EQ(0, System(string("umount ") + original_dir));
ObjectFeederAction<InstallPlan> feeder_action;
InstallAction install_action;
ObjectCollectorAction<string> collector_action;
BondActions(&feeder_action, &install_action);
BondActions(&install_action, &collector_action);
ActionProcessor processor;
processor.EnqueueAction(&feeder_action);
processor.EnqueueAction(&install_action);
processor.EnqueueAction(&collector_action);
InstallPlan install_plan(false, "", "", "delta", loop_dev);
feeder_action.set_obj(install_plan);
processor.StartProcessing();
EXPECT_FALSE(processor.IsRunning()) << "Update to handle async actions";
EXPECT_EQ(loop_dev, collector_action.object());
ASSERT_EQ(0, System(string("mount ") + loop_dev + " " + original_dir));
// Check that original_dir and new_dir are equal
int original_count = 0;
LOG(INFO) << "checking old";
{
FilesystemIterator iter(original_dir,
utils::SetWithValue<string>("/lost+found"));
for (; !iter.IsEnd(); iter.Increment()) {
original_count++;
LOG(INFO) << "checking path: " << iter.GetPartialPath();
EXPECT_TRUE(FilesEqual(original_dir + iter.GetPartialPath(),
new_dir + iter.GetPartialPath()));
}
EXPECT_FALSE(iter.IsErr());
}
LOG(INFO) << "checking new";
int new_count = 0;
{
FilesystemIterator iter(new_dir, set<string>());
for (; !iter.IsEnd(); iter.Increment()) {
new_count++;
LOG(INFO) << "checking path: " << iter.GetPartialPath();
EXPECT_TRUE(FilesEqual(original_dir + iter.GetPartialPath(),
new_dir + iter.GetPartialPath()));
}
EXPECT_FALSE(iter.IsErr());
}
LOG(INFO) << "new_count = " << new_count;
EXPECT_EQ(new_count, original_count);
EXPECT_EQ(12, original_count); // 12 files in each dir
ASSERT_EQ(0, System(string("umount ") + original_dir));
// Cleanup generated files
ASSERT_EQ(0, System(string("rm -rf ") + original_dir));
ASSERT_EQ(0, System(string("rm -rf ") + new_dir));
EXPECT_EQ(0, System(string("rm -f ") + original_image));
ASSERT_EQ(0, system("rm -f delta"));
}
} // namespace chromeos_update_engine
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