@samitouri / QOSamiQemu
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1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 #include "qemu/osdep.h"
26 #include "qapi/error.h"
27 #include "qemu/main-loop.h"
28 #include "qemu/module.h"
29 #include "chardev/char-win.h"
30 #include "chardev/char-win-stdio.h"
31 #include "qom/object.h"
32
33 struct WinStdioChardev {
34 Chardev parent;
35 HANDLE hStdIn;
36 DWORD dwOldMode;
37 HANDLE hInputReadyEvent;
38 HANDLE hInputDoneEvent;
39 HANDLE hInputThread;
40 uint8_t win_stdio_buf;
41 };
42 typedef struct WinStdioChardev WinStdioChardev;
43
44 DECLARE_INSTANCE_CHECKER(WinStdioChardev, WIN_STDIO_CHARDEV,
45 TYPE_CHARDEV_WIN_STDIO)
46
47 static void win_stdio_wait_func(void *opaque)
48 {
49 Chardev *chr = CHARDEV(opaque);
50 WinStdioChardev *stdio = WIN_STDIO_CHARDEV(opaque);
51 INPUT_RECORD buf[4];
52 int ret;
53 DWORD dwSize;
54 int i;
55
56 ret = ReadConsoleInput(stdio->hStdIn, buf, ARRAY_SIZE(buf), &dwSize);
57
58 if (!ret) {
59 /* Avoid error storm */
60 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
61 return;
62 }
63
64 for (i = 0; i < dwSize; i++) {
65 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
66
67 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
68 int j;
69 if (kev->uChar.AsciiChar != 0) {
70 for (j = 0; j < kev->wRepeatCount; j++) {
71 if (qemu_chr_be_can_write(chr)) {
72 uint8_t c = kev->uChar.AsciiChar;
73 qemu_chr_be_write(chr, &c, 1);
74 }
75 }
76 }
77 }
78 }
79 }
80
81 static DWORD WINAPI win_stdio_thread(LPVOID param)
82 {
83 WinStdioChardev *stdio = WIN_STDIO_CHARDEV(param);
84 int ret;
85 DWORD dwSize;
86
87 while (1) {
88
89 /* Wait for one byte */
90 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
91
92 /* Exit in case of error, continue if nothing read */
93 if (!ret) {
94 break;
95 }
96 if (!dwSize) {
97 continue;
98 }
99
100 /* Some terminal emulator returns \r\n for Enter, just pass \n */
101 if (stdio->win_stdio_buf == '\r') {
102 continue;
103 }
104
105 /* Signal the main thread and wait until the byte was eaten */
106 if (!SetEvent(stdio->hInputReadyEvent)) {
107 break;
108 }
109 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
110 != WAIT_OBJECT_0) {
111 break;
112 }
113 }
114
115 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
116 return 0;
117 }
118
119 static void win_stdio_thread_wait_func(void *opaque)
120 {
121 Chardev *chr = CHARDEV(opaque);
122 WinStdioChardev *stdio = WIN_STDIO_CHARDEV(opaque);
123
124 if (qemu_chr_be_can_write(chr)) {
125 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
126 }
127
128 SetEvent(stdio->hInputDoneEvent);
129 }
130
131 static void win_stdio_chr_set_echo(Chardev *chr, bool echo)
132 {
133 WinStdioChardev *stdio = WIN_STDIO_CHARDEV(chr);
134 DWORD dwMode = 0;
135
136 GetConsoleMode(stdio->hStdIn, &dwMode);
137
138 if (echo) {
139 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
140 } else {
141 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
142 }
143 }
144
145 static bool win_stdio_chr_open(Chardev *chr,
146 ChardevBackend *backend,
147 Error **errp)
148 {
149 ChardevStdio *opts = backend->u.stdio.data;
150 bool stdio_allow_signal = !opts->has_signal || opts->signal;
151 WinStdioChardev *stdio = WIN_STDIO_CHARDEV(chr);
152 DWORD dwMode;
153 int is_console = 0;
154
155 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
156 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
157 error_setg(errp, "cannot open stdio: invalid handle");
158 return false;
159 }
160
161 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
162 stdio->dwOldMode = dwMode;
163
164 if (is_console) {
165 if (qemu_add_wait_object(stdio->hStdIn,
166 win_stdio_wait_func, chr)) {
167 error_setg(errp, "qemu_add_wait_object: failed");
168 goto err1;
169 }
170 } else {
171 DWORD dwId;
172
173 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
174 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
175 if (stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
176 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
177 error_setg(errp, "cannot create event");
178 goto err2;
179 }
180 if (qemu_add_wait_object(stdio->hInputReadyEvent,
181 win_stdio_thread_wait_func, chr)) {
182 error_setg(errp, "qemu_add_wait_object: failed");
183 goto err2;
184 }
185 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
186 chr, 0, &dwId);
187
188 if (stdio->hInputThread == INVALID_HANDLE_VALUE) {
189 error_setg(errp, "cannot create stdio thread");
190 goto err3;
191 }
192 }
193
194 dwMode |= ENABLE_LINE_INPUT | ENABLE_VIRTUAL_TERMINAL_INPUT;
195
196 if (is_console) {
197 /* set the terminal in raw mode */
198 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
199 if (stdio_allow_signal) {
200 dwMode |= ENABLE_PROCESSED_INPUT;
201 } else {
202 dwMode &= ~ENABLE_PROCESSED_INPUT;
203 }
204 }
205
206 SetConsoleMode(stdio->hStdIn, dwMode);
207
208 win_stdio_chr_set_echo(chr, false);
209
210 qemu_chr_be_event(chr, CHR_EVENT_OPENED);
211 return true;
212
213 err3:
214 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
215 err2:
216 CloseHandle(stdio->hInputReadyEvent);
217 CloseHandle(stdio->hInputDoneEvent);
218 err1:
219 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
220 return false;
221 }
222
223 static void char_win_stdio_finalize(Object *obj)
224 {
225 WinStdioChardev *stdio = WIN_STDIO_CHARDEV(obj);
226
227 if (stdio->hStdIn != INVALID_HANDLE_VALUE) {
228 SetConsoleMode(stdio->hStdIn, stdio->dwOldMode);
229 }
230 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
231 CloseHandle(stdio->hInputReadyEvent);
232 }
233 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
234 CloseHandle(stdio->hInputDoneEvent);
235 }
236 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
237 TerminateThread(stdio->hInputThread, 0);
238 }
239 }
240
241 static int win_stdio_chr_write(Chardev *chr, const uint8_t *buf, int len)
242 {
243 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
244 DWORD dwSize;
245 int len1;
246
247 len1 = len;
248
249 while (len1 > 0) {
250 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
251 break;
252 }
253 buf += dwSize;
254 len1 -= dwSize;
255 }
256
257 return len - len1;
258 }
259
260 static void char_win_stdio_class_init(ObjectClass *oc, const void *data)
261 {
262 ChardevClass *cc = CHARDEV_CLASS(oc);
263
264 cc->chr_open = win_stdio_chr_open;
265 cc->chr_write = win_stdio_chr_write;
266 cc->chr_set_echo = win_stdio_chr_set_echo;
267 }
268
269 static const TypeInfo char_win_stdio_type_info = {
270 .name = TYPE_CHARDEV_WIN_STDIO,
271 .parent = TYPE_CHARDEV,
272 .instance_size = sizeof(WinStdioChardev),
273 .instance_finalize = char_win_stdio_finalize,
274 .class_init = char_win_stdio_class_init,
275 .abstract = true,
276 };
277
278 static void register_types(void)
279 {
280 type_register_static(&char_win_stdio_type_info);
281 }
282
283 type_init(register_types);