-
Notifications
You must be signed in to change notification settings - Fork 7
/
dev_install.cc
497 lines (416 loc) · 15.2 KB
/
dev_install.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
// Copyright 2019 The Chromium OS 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 "dev-install/dev_install.h"
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <iostream>
#include <istream>
#include <string>
#include <vector>
#include <base/files/file_enumerator.h>
#include <base/files/file_path.h>
#include <base/files/file_util.h>
#include <base/logging.h>
#include <base/strings/string_split.h>
#include <brillo/key_value_store.h>
#include <brillo/process.h>
#include <vboot/crossystem.h>
namespace dev_install {
namespace {
// The root path that we install our dev packages into.
constexpr char kUsrLocal[] = "/usr/local";
// The Portage config path as a subdir under the various roots.
constexpr char kPortageConfigSubdir[] = "etc/portage";
// Where binpkgs are saved as a subdir under the various roots.
constexpr char kBinpkgSubdir[] = "portage/packages";
// File listing of packages we need for bootstrapping.
constexpr char kBootstrapListing[] =
"/usr/share/dev-install/bootstrap.packages";
// Directory of rootfs provided packages.
constexpr char kRootfsProvidedDir[] = "/usr/share/dev-install/rootfs.provided";
// Path to lsb-release file.
constexpr char kLsbReleasePath[] = "/etc/lsb-release";
// The devserer URL for this developer build.
constexpr char kLsbChromeosDevserver[] = "CHROMEOS_DEVSERVER";
// The current OS version.
constexpr char kLsbChromeosReleaseVersion[] = "CHROMEOS_RELEASE_VERSION";
// Setting for the board name.
constexpr char kLsbChromeosReleaseBoard[] = "CHROMEOS_RELEASE_BOARD";
// The base URL of the repository holding our portage prebuilt binpkgs.
constexpr char kDefaultBinhostPrefix[] =
"https://commondatastorage.googleapis.com/chromeos-dev-installer/board";
} // namespace
DevInstall::DevInstall()
: reinstall_(false),
uninstall_(false),
yes_(false),
only_bootstrap_(false),
state_dir_(kUsrLocal),
binhost_(""),
binhost_version_("") {}
DevInstall::DevInstall(const std::string& binhost,
const std::string& binhost_version,
bool reinstall,
bool uninstall,
bool yes,
bool only_bootstrap)
: reinstall_(reinstall),
uninstall_(uninstall),
yes_(yes),
only_bootstrap_(only_bootstrap),
state_dir_(kUsrLocal),
binhost_(binhost),
binhost_version_(binhost_version) {}
bool DevInstall::IsDevMode() const {
int value = ::VbGetSystemPropertyInt("cros_debug");
return value == 1;
}
bool DevInstall::PromptUser(std::istream& input, const std::string& prompt) {
if (yes_)
return true;
std::cout << prompt << "? (y/N) " << std::flush;
std::string buffer;
if (std::getline(input, buffer)) {
return (buffer == "y" || buffer == "y\n");
}
return false;
}
// We have a custom DeletePath helper because we don't want to descend across
// mount points, and no base:: helper supports that.
bool DevInstall::DeletePath(const struct stat& base_stat,
const base::FilePath& dir) {
base::FileEnumerator iter(dir, true,
base::FileEnumerator::FILES |
base::FileEnumerator::DIRECTORIES |
base::FileEnumerator::SHOW_SYM_LINKS);
for (base::FilePath current = iter.Next(); !current.empty();
current = iter.Next()) {
const auto& info(iter.GetInfo());
if (info.IsDirectory()) {
// Abort if the dir is mounted.
if (base_stat.st_dev != info.stat().st_dev) {
LOG(ERROR) << "directory is mounted: " << current.value();
return false;
}
// Clear the contents of this directory.
if (!DeletePath(base_stat, current))
return false;
// Clear this directory itself.
if (rmdir(current.value().c_str())) {
PLOG(ERROR) << "deleting failed: " << current.value();
return false;
}
} else {
if (unlink(current.value().c_str())) {
PLOG(ERROR) << "deleting failed: " << current.value();
return false;
}
}
}
return true;
}
bool DevInstall::CreateMissingDirectory(const base::FilePath& dir) {
if (!base::PathExists(dir)) {
if (!base::CreateDirectory(dir) ||
!base::SetPosixFilePermissions(dir, 0755)) {
PLOG(ERROR) << "Creating " << dir.value() << " failed";
return false;
}
}
return true;
}
bool DevInstall::WriteFile(const base::FilePath& file,
const std::string& data) {
if (base::WriteFile(file, data.c_str(), data.size()) != data.size()) {
PLOG(ERROR) << "Could not write " << file.value();
return false;
}
return true;
}
bool DevInstall::ClearStateDir(const base::FilePath& dir) {
LOG(INFO) << "To clean up, we will run:\n rm -rf /usr/local/\n"
<< "Any content you have stored in there will be deleted.";
if (!PromptUser(std::cin, "Remove all installed packages now")) {
LOG(INFO) << "Operation cancelled.";
return false;
}
// Normally we'd use base::DeleteFile, but we don't want to traverse mounts.
struct stat base_stat;
if (stat(dir.value().c_str(), &base_stat)) {
if (errno == ENOENT)
return true;
PLOG(ERROR) << "Could not access " << dir.value();
return false;
}
bool success = DeletePath(base_stat, dir);
if (success)
LOG(INFO) << "Removed all installed packages.";
else
LOG(ERROR) << "Deleting " << dir.value() << " failed";
return success;
}
bool DevInstall::InitializeStateDir(const base::FilePath& dir) {
// Create this loop so uncompressed files in /usr/local/usr/ will be reachable
// through /usr/local/.
// Note: /usr/local is mount-binded onto the /mnt/stateful_partition/dev_mode
// during chromeos_startup during boot for machines in dev_mode.
const base::FilePath usr = dir.Append("usr");
if (!base::PathExists(usr)) {
// Create /usr/local/usr -> . symlink.
if (!base::CreateSymbolicLink(base::FilePath("."), usr)) {
PLOG(ERROR) << "Creating " << usr.value() << " failed";
return false;
}
}
// Setup a /tmp space for random scripts to rely on.
const base::FilePath tmp = dir.Append("tmp");
if (!base::PathExists(tmp)) {
// Can't use base::SetPosixFilePermissions as that blocks +t mode.
if (!base::CreateDirectory(tmp) || chmod(tmp.value().c_str(), 01777)) {
PLOG(ERROR) << "Creating " << tmp.value() << " failed";
return false;
}
}
const base::FilePath local = usr.Append("local");
if (!base::PathExists(local)) {
// Create /usr/local/usr/local -> . symlink.
if (!base::CreateSymbolicLink(base::FilePath("."), local)) {
PLOG(ERROR) << "Creating " << local.value() << " failed";
return false;
}
}
// Set up symlinks for etc/{group,passwd}, so that packages can look up users
// and groups correctly.
const base::FilePath etc = usr.Append("etc");
if (!CreateMissingDirectory(etc))
return false;
// Create /usr/local/etc/group -> /etc/group symlink.
const base::FilePath group = etc.Append("group");
if (!base::PathExists(group)) {
if (!base::CreateSymbolicLink(base::FilePath("/etc/group"), group)) {
PLOG(ERROR) << "Creating " << group.value() << " failed";
return false;
}
}
// Create /usr/local/etc/passwd -> /etc/passwd symlink.
const base::FilePath passwd = etc.Append("passwd");
if (!base::PathExists(passwd)) {
if (!base::CreateSymbolicLink(base::FilePath("/etc/passwd"), passwd)) {
PLOG(ERROR) << "Creating " << passwd.value() << " failed";
return false;
}
}
return true;
}
bool DevInstall::LoadRuntimeSettings(const base::FilePath& lsb_release) {
brillo::KeyValueStore store;
if (!store.Load(lsb_release)) {
PLOG(WARNING) << "Could not read " << kLsbReleasePath;
return true;
}
if (!store.GetString(kLsbChromeosDevserver, &devserver_url_))
devserver_url_.clear();
if (store.GetString(kLsbChromeosReleaseBoard, &board_)) {
size_t pos = board_.find("-signed-");
if (pos != std::string::npos)
board_.erase(pos);
} else {
board_.clear();
}
// If --binhost_version wasn't specified, calculate it.
if (binhost_version_.empty()) {
store.GetString(kLsbChromeosReleaseVersion, &binhost_version_);
}
return true;
}
void DevInstall::InitializeBinhost() {
if (!binhost_.empty())
return;
if (!devserver_url_.empty()) {
LOG(INFO) << "Devserver URL set to: " << devserver_url_;
if (PromptUser(std::cin, "Use it as the binhost")) {
binhost_ = devserver_url_ + "/static/pkgroot/" + board_ + "/packages";
return;
}
}
binhost_ = std::string(kDefaultBinhostPrefix) + "/" + board_ + "/" +
binhost_version_ + "/packages";
}
bool DevInstall::DownloadAndInstallBootstrapPackage(
const std::string& package) {
const std::string url(binhost_ + "/" + package + ".tbz2");
const base::FilePath binpkg_dir = state_dir_.Append(kBinpkgSubdir);
const base::FilePath pkg = binpkg_dir.Append(package + ".tbz2");
const base::FilePath pkgdir = pkg.DirName();
if (!CreateMissingDirectory(pkgdir))
return false;
LOG(INFO) << "Downloading " + url;
brillo::ProcessImpl curl;
curl.SetSearchPath(true);
curl.AddArg("curl");
curl.AddArg("--fail");
curl.AddStringOption("-o", pkg.value());
curl.AddArg(url);
if (curl.Run() != 0) {
LOG(ERROR) << "Could not download package";
return false;
}
LOG(INFO) << "Unpacking " + pkg.value();
brillo::ProcessImpl tar;
tar.SetSearchPath(true);
tar.AddArg("tar");
tar.AddStringOption("-C", state_dir_.value());
tar.AddArg("-xjkf");
tar.AddArg(pkg.value());
if (tar.Run() != 0) {
LOG(ERROR) << "Could not extract package";
return false;
}
return true;
}
bool DevInstall::DownloadAndInstallBootstrapPackages(
const base::FilePath& listing) {
std::string data;
if (!base::ReadFileToString(listing, &data)) {
PLOG(ERROR) << "Unable to read " << listing.value();
return false;
}
std::vector<std::string> lines = base::SplitString(
data, "\n", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
if (lines.empty()) {
LOG(ERROR) << "Bootstrap package set is empty!";
return false;
}
for (const std::string& line : lines) {
if (!DownloadAndInstallBootstrapPackage(line))
return false;
}
// The python ebuilds set up symlinks in pkg_postinst, but we don't run those
// phases (we just run untar above). Plus that logic depends on eselect that
// we currently stub out. Hand create the symlinks https://crbug.com/955147.
const base::FilePath python = state_dir_.Append("usr/bin/python");
if (!base::PathExists(python)) {
if (!base::CreateSymbolicLink(base::FilePath("python-wrapper"), python)) {
PLOG(ERROR) << "Creating " << python.value() << " failed";
return false;
}
}
const base::FilePath python2 = state_dir_.Append("usr/bin/python2");
if (!base::PathExists(python2)) {
if (!base::CreateSymbolicLink(base::FilePath("python2.7"), python2)) {
PLOG(ERROR) << "Creating " << python2.value() << " failed";
return false;
}
}
const base::FilePath python3 = state_dir_.Append("usr/bin/python3");
if (!base::PathExists(python3)) {
if (!base::CreateSymbolicLink(base::FilePath("python3.6"), python3)) {
PLOG(ERROR) << "Creating " << python3.value() << " failed";
return false;
}
}
return true;
}
bool DevInstall::ConfigurePortage() {
const base::FilePath portage_dir = state_dir_.Append(kPortageConfigSubdir);
const base::FilePath profile_dir = portage_dir.Append("make.profile");
// Copy emerge configuration to /usr/local.
if (!CreateMissingDirectory(profile_dir))
return false;
// Point our local profile to the rootfs one. This allows us to stack.
const base::FilePath parent_path = profile_dir.Append("parent");
const std::string parent_data{"/etc/portage/make.profile\n"};
if (!WriteFile(parent_path, parent_data))
return false;
// Install the package.provided entries for the rootfs.
const base::FilePath provided_path = profile_dir.Append("package.provided");
if (!CreateMissingDirectory(provided_path))
return false;
const base::FilePath rootfs_provided{kRootfsProvidedDir};
base::FileEnumerator iter(rootfs_provided, false,
base::FileEnumerator::FILES);
for (base::FilePath current = iter.Next(); !current.empty();
current = iter.Next()) {
const base::FilePath sym = provided_path.Append(current.BaseName());
if (!base::CreateSymbolicLink(current, sym)) {
PLOG(ERROR) << "Creating " << sym.value() << " failed";
return false;
}
}
// Create the directories defined in the portage config files. Permissions are
// consistent with the other directories in /usr/local, which is a bind mount
// for /mnt/stateful_partition/dev_image.
const base::FilePath make_conf_path = portage_dir.Append("make.conf");
const std::string make_conf_data{"PORTAGE_BINHOST=\"" + binhost_ + "\"\n"};
if (!WriteFile(make_conf_path, make_conf_data))
return false;
return true;
}
bool DevInstall::InstallExtraPackages() {
if (!PromptUser(std::cin, "Install virtual/target-os-dev package now")) {
LOG(INFO) << "You can install virtual/target-os-dev later by running:\n"
<< "emerge virtual/target-os-dev";
return true;
}
brillo::ProcessImpl emerge;
emerge.SetSearchPath(true);
emerge.AddArg("emerge");
emerge.AddArg("virtual/target-os-dev");
if (emerge.Run() != 0) {
LOG(ERROR) << "Could not install virtual/target-os-dev";
return false;
}
return true;
}
int DevInstall::Run() {
// Only run if dev mode is enabled.
if (!IsDevMode()) {
LOG(ERROR) << "Chrome OS is not in developer mode";
return 2;
}
// Handle reinstall & uninstall operations.
if (reinstall_ || uninstall_) {
if (!ClearStateDir(state_dir_))
return 1;
if (uninstall_)
return 0;
LOG(INFO) << "Reinstalling dev state";
}
// See if the system has been initialized already.
const base::FilePath portage_dir = state_dir_.Append(kPortageConfigSubdir);
if (base::DirectoryExists(portage_dir)) {
LOG(ERROR) << "Directory " << portage_dir.value() << " exists.";
LOG(ERROR) << "Did you mean dev_install --reinstall?";
return 4;
}
// Initialize the base set of paths before we install any packages.
if (!InitializeStateDir(state_dir_))
return 5;
// Load the settings from the active device.
if (!LoadRuntimeSettings(base::FilePath(kLsbReleasePath)))
return 6;
// Parses flags to return the binhost or if none set, use the default binhost
// set up from installation.
InitializeBinhost();
LOG(INFO) << "Using binhost: " << binhost_;
// Bootstrap the setup.
LOG(INFO) << "Starting installation of developer packages.";
LOG(INFO) << "First, we download the necessary files.";
if (!DownloadAndInstallBootstrapPackages(base::FilePath(kBootstrapListing)))
return 7;
if (only_bootstrap_) {
LOG(INFO) << "Done installing bootstrap packages. Enjoy!";
return 0;
}
LOG(INFO) << "Developer packages initialized; configuring portage.";
if (!ConfigurePortage())
return 8;
LOG(INFO) << "Installing additional optional packages.";
if (!InstallExtraPackages())
return 9;
LOG(INFO) << "Done! Enjoy! Or not, you choose!";
return 0;
}
} // namespace dev_install