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>
51 #ifdef DCPOMATIC_LINUX
52 #include <polkit/polkit.h>
56 #ifdef DCPOMATIC_WINDOWS
58 #include <lwext4/file_windows.h>
62 DCPOMATIC_DISABLE_WARNINGS
64 DCPOMATIC_ENABLE_WARNINGS
67 #include <sys/types.h>
68 #include <boost/filesystem.hpp>
69 #include <boost/algorithm/string.hpp>
76 using std::runtime_error;
79 using boost::optional;
82 #define SHORT_TIMEOUT 100
83 #define LONG_TIMEOUT 2000
86 #ifdef DCPOMATIC_LINUX
87 static PolkitAuthority* polkit_authority = nullptr;
89 static Nanomsg* nanomsg = nullptr;
92 #ifdef DCPOMATIC_LINUX
94 polkit_callback (GObject *, GAsyncResult* res, gpointer data)
96 auto parameters = reinterpret_cast<std::pair<std::function<void ()>, std::function<void ()>>*> (data);
97 GError* error = nullptr;
98 auto result = polkit_authority_check_authorization_finish (polkit_authority, res, &error);
102 LOG_DISK("polkit authority check failed (check_authorization_finish failed with %1)", error->message);
105 if (polkit_authorization_result_get_is_authorized(result)) {
109 if (polkit_authorization_result_get_is_challenge(result)) {
110 LOG_DISK_NC("polkit authority check failed (challenge)");
112 LOG_DISK_NC("polkit authority check failed (not authorized)");
118 parameters->second();
124 g_object_unref (result);
130 #ifdef DCPOMATIC_LINUX
131 void request_privileges (string action, std::function<void ()> granted, std::function<void ()> denied)
133 void request_privileges (string, std::function<void ()> granted, std::function<void ()>)
136 #ifdef DCPOMATIC_LINUX
137 polkit_authority = polkit_authority_get_sync (0, 0);
138 auto subject = polkit_unix_process_new_for_owner (getppid(), 0, -1);
140 auto parameters = new std::pair<std::function<void ()>, std::function<void ()>>(granted, denied);
141 polkit_authority_check_authorization (
142 polkit_authority, subject, action.c_str(), 0, POLKIT_CHECK_AUTHORIZATION_FLAGS_ALLOW_USER_INTERACTION, 0, polkit_callback, parameters
154 using namespace boost::algorithm;
156 auto s = nanomsg->receive (0);
161 LOG_DISK("Writer receives command: %1", *s);
163 if (*s == DISK_WRITER_QUIT) {
165 } else if (*s == DISK_WRITER_PING) {
166 nanomsg->send(DISK_WRITER_PONG "\n", LONG_TIMEOUT);
167 } else if (*s == DISK_WRITER_UNMOUNT) {
168 auto xml_head = nanomsg->receive (LONG_TIMEOUT);
169 auto xml_body = nanomsg->receive (LONG_TIMEOUT);
170 if (!xml_head || !xml_body) {
171 LOG_DISK_NC("Failed to receive unmount request");
172 throw CommunicationFailedError ();
174 auto xml = *xml_head + *xml_body;
176 "com.dcpomatic.write-drive",
178 bool const success = Drive(xml).unmount();
179 if (!nanomsg->send(success ? (DISK_WRITER_OK "\n") : (DISK_WRITER_ERROR "\n"), LONG_TIMEOUT)) {
180 LOG_DISK_NC("CommunicationFailedError in unmount_finished");
181 throw CommunicationFailedError ();
185 if (!nanomsg->send(DISK_WRITER_ERROR "\n", LONG_TIMEOUT)) {
186 LOG_DISK_NC("CommunicationFailedError in unmount_finished");
187 throw CommunicationFailedError ();
190 } else if (*s == DISK_WRITER_WRITE) {
191 auto dcp_path_opt = nanomsg->receive (LONG_TIMEOUT);
192 auto device_opt = nanomsg->receive (LONG_TIMEOUT);
193 if (!dcp_path_opt || !device_opt) {
194 LOG_DISK_NC("Failed to receive write request");
195 throw CommunicationFailedError();
198 auto dcp_path = *dcp_path_opt;
199 auto device = *device_opt;
201 /* Do some basic sanity checks; this is a bit belt-and-braces but it can't hurt... */
204 if (!starts_with(device, "/dev/disk")) {
205 LOG_DISK ("Will not write to %1", device);
206 nanomsg->send(DISK_WRITER_ERROR "\nRefusing to write to this drive\n1\n", LONG_TIMEOUT);
210 #ifdef DCPOMATIC_LINUX
211 if (!starts_with(device, "/dev/sd") && !starts_with(device, "/dev/hd")) {
212 LOG_DISK ("Will not write to %1", device);
213 nanomsg->send(DISK_WRITER_ERROR "\nRefusing to write to this drive\n1\n", LONG_TIMEOUT);
217 #ifdef DCPOMATIC_WINDOWS
218 if (!starts_with(device, "\\\\.\\PHYSICALDRIVE")) {
219 LOG_DISK ("Will not write to %1", device);
220 nanomsg->send(DISK_WRITER_ERROR "\nRefusing to write to this drive\n1\n", LONG_TIMEOUT);
225 bool on_drive_list = false;
226 bool mounted = false;
227 for (auto const& i: Drive::get()) {
228 if (i.device() == device) {
229 on_drive_list = true;
230 mounted = i.mounted();
234 if (!on_drive_list) {
235 LOG_DISK ("Will not write to %1 as it's not recognised as a drive", device);
236 nanomsg->send(DISK_WRITER_ERROR "\nRefusing to write to this drive\n1\n", LONG_TIMEOUT);
240 LOG_DISK ("Will not write to %1 as it's mounted", device);
241 nanomsg->send(DISK_WRITER_ERROR "\nRefusing to write to this drive\n1\n", LONG_TIMEOUT);
245 LOG_DISK ("Here we go writing %1 to %2", dcp_path, device);
248 "com.dcpomatic.write-drive",
249 [dcp_path, device]() {
250 #if defined(DCPOMATIC_LINUX)
251 auto posix_partition = device;
252 /* XXX: don't know if this logic is sensible */
253 if (posix_partition.size() > 0 && isdigit(posix_partition[posix_partition.length() - 1])) {
254 posix_partition += "p1";
256 posix_partition += "1";
258 dcpomatic::write (dcp_path, device, posix_partition, nanomsg);
259 #elif defined(DCPOMATIC_OSX)
260 auto fast_device = boost::algorithm::replace_first_copy (device, "/dev/disk", "/dev/rdisk");
261 dcpomatic::write (dcp_path, fast_device, fast_device + "s1", nanomsg);
262 #elif defined(DCPOMATIC_WINDOWS)
263 dcpomatic::write (dcp_path, device, "", nanomsg);
268 nanomsg->send(DISK_WRITER_ERROR "\nCould not obtain authorization to write to the drive\n", LONG_TIMEOUT);
274 } catch (exception& e) {
275 LOG_DISK("Exception (from idle): %1", e.what());
283 /* On macOS this is running as root, so config_path() will be somewhere in root's
284 * home. Instead, just write to stdout as the macOS process control stuff will
285 * redirect this to a file in /var/log
287 dcpomatic_log.reset(new StdoutLog(LogEntry::TYPE_DISK));
288 LOG_DISK("dcpomatic_disk_writer %1 started", dcpomatic_git_commit);
290 /* XXX: this is a hack, but I expect we'll need logs and I'm not sure if there's
291 * a better place to put them.
293 dcpomatic_log.reset(new FileLog(State::write_path("disk_writer.log"), LogEntry::TYPE_DISK));
294 LOG_DISK_NC("dcpomatic_disk_writer started");
298 /* I *think* this consumes the notifyd event that we used to start the process, so we only
299 * get started once per notification.
301 xpc_set_event_stream_handler("com.apple.notifyd.matching", DISPATCH_TARGET_QUEUE_DEFAULT, ^(xpc_object_t) {});
305 nanomsg = new Nanomsg (false);
306 } catch (runtime_error& e) {
307 LOG_DISK_NC("Could not set up nanomsg socket");
311 LOG_DISK_NC("Entering main loop");
312 auto ml = Glib::MainLoop::create ();
313 Glib::signal_timeout().connect(sigc::ptr_fun(&idle), 500);