2 Copyright (C) 2019-2021 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
22 #include "lib/compose.hpp"
23 #include "lib/cross.h"
24 #include "lib/dcpomatic_log.h"
25 #include "lib/digester.h"
26 #include "lib/disk_writer_messages.h"
27 #include "lib/exceptions.h"
29 #include "lib/file_log.h"
30 #include "lib/state.h"
31 #include "lib/nanomsg.h"
33 #include "lib/version.h"
34 #include "lib/warnings.h"
36 #ifdef DCPOMATIC_POSIX
37 #include <sys/ioctl.h>
38 #include <sys/types.h>
43 #include "lib/stdout_log.h"
46 #include <lwext4/file_dev.h>
52 #ifdef DCPOMATIC_LINUX
53 #include <polkit/polkit.h>
57 #ifdef DCPOMATIC_WINDOWS
59 #include <lwext4/file_windows.h>
63 DCPOMATIC_DISABLE_WARNINGS
65 DCPOMATIC_ENABLE_WARNINGS
68 #include <sys/types.h>
69 #include <boost/filesystem.hpp>
70 #include <boost/algorithm/string.hpp>
77 using std::runtime_error;
80 using boost::optional;
83 #define SHORT_TIMEOUT 100
84 #define LONG_TIMEOUT 2000
87 #ifdef DCPOMATIC_LINUX
88 static PolkitAuthority* polkit_authority = nullptr;
90 static Nanomsg* nanomsg = nullptr;
93 #ifdef DCPOMATIC_LINUX
95 polkit_callback (GObject *, GAsyncResult* res, gpointer data)
97 auto parameters = reinterpret_cast<std::pair<std::function<void ()>, std::function<void ()>>*> (data);
98 GError* error = nullptr;
99 auto result = polkit_authority_check_authorization_finish (polkit_authority, res, &error);
103 LOG_DISK("polkit authority check failed (check_authorization_finish failed with %1)", error->message);
106 if (polkit_authorization_result_get_is_authorized(result)) {
110 if (polkit_authorization_result_get_is_challenge(result)) {
111 LOG_DISK_NC("polkit authority check failed (challenge)");
113 LOG_DISK_NC("polkit authority check failed (not authorized)");
119 parameters->second();
125 g_object_unref (result);
131 #ifdef DCPOMATIC_LINUX
132 void request_privileges (string action, std::function<void ()> granted, std::function<void ()> denied)
134 void request_privileges (string, std::function<void ()> granted, std::function<void ()>)
137 #ifdef DCPOMATIC_LINUX
138 polkit_authority = polkit_authority_get_sync (0, 0);
139 auto subject = polkit_unix_process_new_for_owner (getppid(), 0, -1);
141 auto parameters = new std::pair<std::function<void ()>, std::function<void ()>>(granted, denied);
142 polkit_authority_check_authorization (
143 polkit_authority, subject, action.c_str(), 0, POLKIT_CHECK_AUTHORIZATION_FLAGS_ALLOW_USER_INTERACTION, 0, polkit_callback, parameters
155 using namespace boost::algorithm;
157 auto s = nanomsg->receive (0);
162 LOG_DISK("Writer receives command: %1", *s);
164 if (*s == DISK_WRITER_QUIT) {
166 } else if (*s == DISK_WRITER_PING) {
167 nanomsg->send(DISK_WRITER_PONG "\n", LONG_TIMEOUT);
168 } else if (*s == DISK_WRITER_UNMOUNT) {
169 auto xml_head = nanomsg->receive (LONG_TIMEOUT);
170 auto xml_body = nanomsg->receive (LONG_TIMEOUT);
171 if (!xml_head || !xml_body) {
172 LOG_DISK_NC("Failed to receive unmount request");
173 throw CommunicationFailedError ();
175 auto xml = *xml_head + *xml_body;
177 "com.dcpomatic.write-drive",
179 bool const success = Drive(xml).unmount();
180 if (!nanomsg->send(success ? (DISK_WRITER_OK "\n") : (DISK_WRITER_ERROR "\n"), LONG_TIMEOUT)) {
181 LOG_DISK_NC("CommunicationFailedError in unmount_finished");
182 throw CommunicationFailedError ();
186 if (!nanomsg->send(DISK_WRITER_ERROR "\n", LONG_TIMEOUT)) {
187 LOG_DISK_NC("CommunicationFailedError in unmount_finished");
188 throw CommunicationFailedError ();
191 } else if (*s == DISK_WRITER_WRITE) {
192 auto dcp_path_opt = nanomsg->receive (LONG_TIMEOUT);
193 auto device_opt = nanomsg->receive (LONG_TIMEOUT);
194 if (!dcp_path_opt || !device_opt) {
195 LOG_DISK_NC("Failed to receive write request");
196 throw CommunicationFailedError();
199 auto dcp_path = *dcp_path_opt;
200 auto device = *device_opt;
202 /* Do some basic sanity checks; this is a bit belt-and-braces but it can't hurt... */
205 if (!starts_with(device, "/dev/disk")) {
206 LOG_DISK ("Will not write to %1", device);
207 nanomsg->send(DISK_WRITER_ERROR "\nRefusing to write to this drive\n1\n", LONG_TIMEOUT);
211 #ifdef DCPOMATIC_LINUX
212 if (!starts_with(device, "/dev/sd") && !starts_with(device, "/dev/hd")) {
213 LOG_DISK ("Will not write to %1", device);
214 nanomsg->send(DISK_WRITER_ERROR "\nRefusing to write to this drive\n1\n", LONG_TIMEOUT);
218 #ifdef DCPOMATIC_WINDOWS
219 if (!starts_with(device, "\\\\.\\PHYSICALDRIVE")) {
220 LOG_DISK ("Will not write to %1", device);
221 nanomsg->send(DISK_WRITER_ERROR "\nRefusing to write to this drive\n1\n", LONG_TIMEOUT);
226 bool on_drive_list = false;
227 bool mounted = false;
228 for (auto const& i: Drive::get()) {
229 if (i.device() == device) {
230 on_drive_list = true;
231 mounted = i.mounted();
235 if (!on_drive_list) {
236 LOG_DISK ("Will not write to %1 as it's not recognised as a drive", device);
237 nanomsg->send(DISK_WRITER_ERROR "\nRefusing to write to this drive\n1\n", LONG_TIMEOUT);
241 LOG_DISK ("Will not write to %1 as it's mounted", device);
242 nanomsg->send(DISK_WRITER_ERROR "\nRefusing to write to this drive\n1\n", LONG_TIMEOUT);
246 LOG_DISK ("Here we go writing %1 to %2", dcp_path, device);
249 "com.dcpomatic.write-drive",
250 [dcp_path, device]() {
251 #if defined(DCPOMATIC_LINUX)
252 auto posix_partition = device;
253 /* XXX: don't know if this logic is sensible */
254 if (posix_partition.size() > 0 && isdigit(posix_partition[posix_partition.length() - 1])) {
255 posix_partition += "p1";
257 posix_partition += "1";
259 dcpomatic::write (dcp_path, device, posix_partition, nanomsg);
260 #elif defined(DCPOMATIC_OSX)
261 auto fast_device = boost::algorithm::replace_first_copy (device, "/dev/disk", "/dev/rdisk");
262 dcpomatic::write (dcp_path, fast_device, fast_device + "s1", nanomsg);
263 #elif defined(DCPOMATIC_WINDOWS)
264 dcpomatic::write (dcp_path, device, "", nanomsg);
269 nanomsg->send(DISK_WRITER_ERROR "\nCould not obtain authorization to write to the drive\n", LONG_TIMEOUT);
275 } catch (exception& e) {
276 LOG_DISK("Exception (from idle): %1", e.what());
284 /* On macOS this is running as root, so config_path() will be somewhere in root's
285 * home. Instead, just write to stdout as the macOS process control stuff will
286 * redirect this to a file in /var/log
288 dcpomatic_log.reset(new StdoutLog(LogEntry::TYPE_DISK));
289 LOG_DISK("dcpomatic_disk_writer %1 started uid=%2 euid=%3", dcpomatic_git_commit, getuid(), geteuid());
291 /* XXX: this is a hack, but I expect we'll need logs and I'm not sure if there's
292 * a better place to put them.
294 dcpomatic_log.reset(new FileLog(State::write_path("disk_writer.log"), LogEntry::TYPE_DISK));
295 LOG_DISK_NC("dcpomatic_disk_writer started");
299 /* I *think* this consumes the notifyd event that we used to start the process, so we only
300 * get started once per notification.
302 xpc_set_event_stream_handler("com.apple.notifyd.matching", DISPATCH_TARGET_QUEUE_DEFAULT, ^(xpc_object_t) {});
306 nanomsg = new Nanomsg (false);
307 } catch (runtime_error& e) {
308 LOG_DISK_NC("Could not set up nanomsg socket");
312 LOG_DISK_NC("Entering main loop");
313 auto ml = Glib::MainLoop::create ();
314 Glib::signal_timeout().connect(sigc::ptr_fun(&idle), 500);