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
|
// Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "Windows 7 drivers" project.
// For details, see https://github.com/egor-tensin/windows7-drivers.
// Distributed under the MIT License.
#include "libservice/all.hpp"
#include <Windows.h>
#include <string>
#include <system_error>
#include <utility>
#include <vector>
namespace libservice
{
namespace
{
ServiceHandle open_service(
const ServiceManager& mgr,
const std::string& name)
{
const auto raw = OpenServiceA(
mgr,
name.c_str(),
SERVICE_ALL_ACCESS);
if (NULL == raw)
{
const auto ec = GetLastError();
throw std::system_error(
ec, WindowsErrorCategory::get(), LIBSERVICE_ERROR_PREFIX);
}
return raw;
}
ServiceHandle install_service(
const ServiceManager& mgr,
const std::string& name,
const std::string& bin_path)
{
const auto raw = CreateServiceA(
mgr,
name.c_str(),
name.c_str(),
SERVICE_ALL_ACCESS,
SERVICE_KERNEL_DRIVER,
SERVICE_DEMAND_START,
SERVICE_ERROR_NORMAL,
bin_path.c_str(),
NULL,
NULL,
NULL,
NULL,
NULL);
if (NULL == raw)
{
const auto ec = GetLastError();
throw std::system_error(
ec, WindowsErrorCategory::get(), LIBSERVICE_ERROR_PREFIX);
}
return raw;
}
void start_service(const ServiceHandle& handle)
{
if (!StartService(handle, 0, NULL))
{
const auto ec = GetLastError();
throw std::system_error(
ec, WindowsErrorCategory::get(), LIBSERVICE_ERROR_PREFIX);
}
}
void stop_service(const ServiceHandle& handle)
{
SERVICE_STATUS service_status;
if (!ControlService(handle, SERVICE_CONTROL_STOP, &service_status))
{
const auto ec = GetLastError();
throw std::system_error(
ec, WindowsErrorCategory::get(), LIBSERVICE_ERROR_PREFIX);
}
}
void uninstall_service(const ServiceHandle& handle)
{
if (!DeleteService(handle))
{
const auto ec = GetLastError();
throw std::system_error(
ec, WindowsErrorCategory::get(), LIBSERVICE_ERROR_PREFIX);
}
}
bool service_exists(
const ServiceManager& mgr,
const std::string& name)
{
const auto raw = OpenServiceA(
mgr,
name.c_str(),
SERVICE_QUERY_STATUS);
if (NULL != raw)
{
ServiceHandle handle(raw);
return true;
}
const auto ec = GetLastError();
switch (ec)
{
case ERROR_SERVICE_DOES_NOT_EXIST:
return false;
default:
throw std::system_error(
ec, WindowsErrorCategory::get(), LIBSERVICE_ERROR_PREFIX);
}
}
SERVICE_STATUS_PROCESS query_service_status(const ServiceHandle& handle)
{
SERVICE_STATUS_PROCESS status;
DWORD nbreq;
const auto buf_ptr = reinterpret_cast<BYTE*>(&status);
const auto buf_size = sizeof(status);
if (!QueryServiceStatusEx(
handle, SC_STATUS_PROCESS_INFO, buf_ptr, buf_size, &nbreq))
{
const auto ec = GetLastError();
throw std::system_error(
ec, WindowsErrorCategory::get(), LIBSERVICE_ERROR_PREFIX);
}
return status;
}
DWORD query_service_state(const ServiceHandle& handle)
{
return query_service_status(handle).dwCurrentState;
}
SERVICE_STATUS_PROCESS wait_for_service_state(
const ServiceHandle& handle,
const DWORD desired_state)
{
auto status = query_service_status(handle);
DWORD old_timestamp = GetTickCount();
DWORD old_check_point = status.dwCheckPoint;
DWORD old_wait_hint = status.dwWaitHint;
while (desired_state != status.dwCurrentState)
{
DWORD wait_time = old_wait_hint / 10;
if (wait_time < 1000)
wait_time = 1000;
else if (wait_time > 10000)
wait_time = 10000;
Sleep(wait_time);
status = query_service_status(handle);
if (desired_state == status.dwCurrentState)
break;
if (status.dwCheckPoint > old_check_point)
{
old_timestamp = GetTickCount();
old_check_point = status.dwCheckPoint;
old_wait_hint = status.dwWaitHint;
}
else if (GetTickCount() - old_timestamp > old_wait_hint)
{
return status;
}
}
return status;
}
}
Service Service::open(
const ServiceManager& mgr,
const std::string& name)
{
return open_service(mgr, name);
}
Service Service::install(
const ServiceManager& mgr,
const std::string& name,
const std::string& bin_path)
{
return install_service(mgr, name, bin_path);
}
bool Service::exists(
const ServiceManager& mgr,
const std::string& name)
{
return service_exists(mgr, name);
}
void Service::start() const
{
const auto state = query_service_state(handle);
switch (state)
{
case SERVICE_STOPPED:
break;
case SERVICE_STOP_PENDING:
wait_for_service_state(handle, SERVICE_STOPPED);
break;
default:
return;
}
start_service(handle);
wait_for_service_state(handle, SERVICE_RUNNING);
}
void Service::stop() const
{
switch (query_service_state(handle))
{
case SERVICE_STOPPED:
return;
case SERVICE_STOP_PENDING:
wait_for_service_state(handle, SERVICE_STOPPED);
return;
}
stop_service(handle);
wait_for_service_state(handle, SERVICE_STOPPED);
}
void Service::uninstall() const
{
stop();
uninstall_service(handle);
}
void swap(Service& a, Service& b) LIBSERVICE_NOEXCEPT
{
a.swap(b);
}
}
namespace std
{
template <>
void swap<libservice::Service>(
libservice::Service& a,
libservice::Service& b) LIBSERVICE_NOEXCEPT
{
a.swap(b);
}
}
|
