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qemu-ga: avoid blocking on atime update when reading /etc/mtab
[qemu-kvm.git] / qemu-char.c
blobfe1126fe8655683cbd069a61b0e1dbdb112c9cb7
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 #include "qemu-common.h"
25 #include "net.h"
26 #include "monitor.h"
27 #include "console.h"
28 #include "sysemu.h"
29 #include "qemu-timer.h"
30 #include "qemu-char.h"
31 #include "hw/usb.h"
32 #include "hw/baum.h"
33 #include "hw/msmouse.h"
34 #include "qmp-commands.h"
35
36 #include <unistd.h>
37 #include <fcntl.h>
38 #include <time.h>
39 #include <errno.h>
40 #include <sys/time.h>
41 #include <zlib.h>
42
43 #ifndef _WIN32
44 #include <sys/times.h>
45 #include <sys/wait.h>
46 #include <termios.h>
47 #include <sys/mman.h>
48 #include <sys/ioctl.h>
49 #include <sys/resource.h>
50 #include <sys/socket.h>
51 #include <netinet/in.h>
52 #include <net/if.h>
53 #include <arpa/inet.h>
54 #include <dirent.h>
55 #include <netdb.h>
56 #include <sys/select.h>
57 #ifdef CONFIG_BSD
58 #include <sys/stat.h>
59 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
60 #include <libutil.h>
61 #include <dev/ppbus/ppi.h>
62 #include <dev/ppbus/ppbconf.h>
63 #if defined(__GLIBC__)
64 #include <pty.h>
65 #endif
66 #elif defined(__DragonFly__)
67 #include <libutil.h>
68 #include <dev/misc/ppi/ppi.h>
69 #include <bus/ppbus/ppbconf.h>
70 #else
71 #include <util.h>
72 #endif
73 #else
74 #ifdef __linux__
75 #include <pty.h>
76
77 #include <linux/ppdev.h>
78 #include <linux/parport.h>
79 #endif
80 #ifdef __sun__
81 #include <sys/stat.h>
82 #include <sys/ethernet.h>
83 #include <sys/sockio.h>
84 #include <netinet/arp.h>
85 #include <netinet/in.h>
86 #include <netinet/in_systm.h>
87 #include <netinet/ip.h>
88 #include <netinet/ip_icmp.h> // must come after ip.h
89 #include <netinet/udp.h>
90 #include <netinet/tcp.h>
91 #include <net/if.h>
92 #include <syslog.h>
93 #include <stropts.h>
94 #endif
95 #endif
96 #endif
97
98 #include "qemu_socket.h"
99 #include "ui/qemu-spice.h"
100
101 #define READ_BUF_LEN 4096
102
103 /***********************************************************/
104 /* character device */
105
106 static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
107 QTAILQ_HEAD_INITIALIZER(chardevs);
108
109 void qemu_chr_be_event(CharDriverState *s, int event)
110 {
111 /* Keep track if the char device is open */
112 switch (event) {
113 case CHR_EVENT_OPENED:
114 s->opened = 1;
115 break;
116 case CHR_EVENT_CLOSED:
117 s->opened = 0;
118 break;
119 }
120
121 if (!s->chr_event)
122 return;
123 s->chr_event(s->handler_opaque, event);
124 }
125
126 static void qemu_chr_generic_open_bh(void *opaque)
127 {
128 CharDriverState *s = opaque;
129 qemu_chr_be_event(s, CHR_EVENT_OPENED);
130 qemu_bh_delete(s->bh);
131 s->bh = NULL;
132 }
133
134 void qemu_chr_generic_open(CharDriverState *s)
135 {
136 if (s->bh == NULL) {
137 s->bh = qemu_bh_new(qemu_chr_generic_open_bh, s);
138 qemu_bh_schedule(s->bh);
139 }
140 }
141
142 int qemu_chr_fe_write(CharDriverState *s, const uint8_t *buf, int len)
143 {
144 return s->chr_write(s, buf, len);
145 }
146
147 int qemu_chr_fe_ioctl(CharDriverState *s, int cmd, void *arg)
148 {
149 if (!s->chr_ioctl)
150 return -ENOTSUP;
151 return s->chr_ioctl(s, cmd, arg);
152 }
153
154 int qemu_chr_be_can_write(CharDriverState *s)
155 {
156 if (!s->chr_can_read)
157 return 0;
158 return s->chr_can_read(s->handler_opaque);
159 }
160
161 void qemu_chr_be_write(CharDriverState *s, uint8_t *buf, int len)
162 {
163 if (s->chr_read) {
164 s->chr_read(s->handler_opaque, buf, len);
165 }
166 }
167
168 int qemu_chr_fe_get_msgfd(CharDriverState *s)
169 {
170 return s->get_msgfd ? s->get_msgfd(s) : -1;
171 }
172
173 int qemu_chr_add_client(CharDriverState *s, int fd)
174 {
175 return s->chr_add_client ? s->chr_add_client(s, fd) : -1;
176 }
177
178 void qemu_chr_accept_input(CharDriverState *s)
179 {
180 if (s->chr_accept_input)
181 s->chr_accept_input(s);
182 qemu_notify_event();
183 }
184
185 void qemu_chr_fe_printf(CharDriverState *s, const char *fmt, ...)
186 {
187 char buf[READ_BUF_LEN];
188 va_list ap;
189 va_start(ap, fmt);
190 vsnprintf(buf, sizeof(buf), fmt, ap);
191 qemu_chr_fe_write(s, (uint8_t *)buf, strlen(buf));
192 va_end(ap);
193 }
194
195 void qemu_chr_add_handlers(CharDriverState *s,
196 IOCanReadHandler *fd_can_read,
197 IOReadHandler *fd_read,
198 IOEventHandler *fd_event,
199 void *opaque)
200 {
201 if (!opaque && !fd_can_read && !fd_read && !fd_event) {
202 /* chr driver being released. */
203 ++s->avail_connections;
204 }
205 s->chr_can_read = fd_can_read;
206 s->chr_read = fd_read;
207 s->chr_event = fd_event;
208 s->handler_opaque = opaque;
209 if (s->chr_update_read_handler)
210 s->chr_update_read_handler(s);
211
212 /* We're connecting to an already opened device, so let's make sure we
213 also get the open event */
214 if (s->opened) {
215 qemu_chr_generic_open(s);
216 }
217 }
218
219 static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
220 {
221 return len;
222 }
223
224 static CharDriverState *qemu_chr_open_null(QemuOpts *opts)
225 {
226 CharDriverState *chr;
227
228 chr = g_malloc0(sizeof(CharDriverState));
229 chr->chr_write = null_chr_write;
230 return chr;
231 }
232
233 /* MUX driver for serial I/O splitting */
234 #define MAX_MUX 4
235 #define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
236 #define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
237 typedef struct {
238 IOCanReadHandler *chr_can_read[MAX_MUX];
239 IOReadHandler *chr_read[MAX_MUX];
240 IOEventHandler *chr_event[MAX_MUX];
241 void *ext_opaque[MAX_MUX];
242 CharDriverState *drv;
243 int focus;
244 int mux_cnt;
245 int term_got_escape;
246 int max_size;
247 /* Intermediate input buffer allows to catch escape sequences even if the
248 currently active device is not accepting any input - but only until it
249 is full as well. */
250 unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
251 int prod[MAX_MUX];
252 int cons[MAX_MUX];
253 int timestamps;
254 int linestart;
255 int64_t timestamps_start;
256 } MuxDriver;
257
258
259 static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
260 {
261 MuxDriver *d = chr->opaque;
262 int ret;
263 if (!d->timestamps) {
264 ret = d->drv->chr_write(d->drv, buf, len);
265 } else {
266 int i;
267
268 ret = 0;
269 for (i = 0; i < len; i++) {
270 if (d->linestart) {
271 char buf1[64];
272 int64_t ti;
273 int secs;
274
275 ti = qemu_get_clock_ms(rt_clock);
276 if (d->timestamps_start == -1)
277 d->timestamps_start = ti;
278 ti -= d->timestamps_start;
279 secs = ti / 1000;
280 snprintf(buf1, sizeof(buf1),
281 "[%02d:%02d:%02d.%03d] ",
282 secs / 3600,
283 (secs / 60) % 60,
284 secs % 60,
285 (int)(ti % 1000));
286 d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
287 d->linestart = 0;
288 }
289 ret += d->drv->chr_write(d->drv, buf+i, 1);
290 if (buf[i] == '\n') {
291 d->linestart = 1;
292 }
293 }
294 }
295 return ret;
296 }
297
298 static const char * const mux_help[] = {
299 "% h print this help\n\r",
300 "% x exit emulator\n\r",
301 "% s save disk data back to file (if -snapshot)\n\r",
302 "% t toggle console timestamps\n\r"
303 "% b send break (magic sysrq)\n\r",
304 "% c switch between console and monitor\n\r",
305 "% % sends %\n\r",
306 NULL
307 };
308
309 int term_escape_char = 0x01; /* ctrl-a is used for escape */
310 static void mux_print_help(CharDriverState *chr)
311 {
312 int i, j;
313 char ebuf[15] = "Escape-Char";
314 char cbuf[50] = "\n\r";
315
316 if (term_escape_char > 0 && term_escape_char < 26) {
317 snprintf(cbuf, sizeof(cbuf), "\n\r");
318 snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
319 } else {
320 snprintf(cbuf, sizeof(cbuf),
321 "\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
322 term_escape_char);
323 }
324 chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
325 for (i = 0; mux_help[i] != NULL; i++) {
326 for (j=0; mux_help[i][j] != '\0'; j++) {
327 if (mux_help[i][j] == '%')
328 chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
329 else
330 chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
331 }
332 }
333 }
334
335 static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
336 {
337 if (d->chr_event[mux_nr])
338 d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
339 }
340
341 static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
342 {
343 if (d->term_got_escape) {
344 d->term_got_escape = 0;
345 if (ch == term_escape_char)
346 goto send_char;
347 switch(ch) {
348 case '?':
349 case 'h':
350 mux_print_help(chr);
351 break;
352 case 'x':
353 {
354 const char *term = "QEMU: Terminated\n\r";
355 chr->chr_write(chr,(uint8_t *)term,strlen(term));
356 exit(0);
357 break;
358 }
359 case 's':
360 bdrv_commit_all();
361 break;
362 case 'b':
363 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
364 break;
365 case 'c':
366 /* Switch to the next registered device */
367 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
368 d->focus++;
369 if (d->focus >= d->mux_cnt)
370 d->focus = 0;
371 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
372 break;
373 case 't':
374 d->timestamps = !d->timestamps;
375 d->timestamps_start = -1;
376 d->linestart = 0;
377 break;
378 }
379 } else if (ch == term_escape_char) {
380 d->term_got_escape = 1;
381 } else {
382 send_char:
383 return 1;
384 }
385 return 0;
386 }
387
388 static void mux_chr_accept_input(CharDriverState *chr)
389 {
390 MuxDriver *d = chr->opaque;
391 int m = d->focus;
392
393 while (d->prod[m] != d->cons[m] &&
394 d->chr_can_read[m] &&
395 d->chr_can_read[m](d->ext_opaque[m])) {
396 d->chr_read[m](d->ext_opaque[m],
397 &d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
398 }
399 }
400
401 static int mux_chr_can_read(void *opaque)
402 {
403 CharDriverState *chr = opaque;
404 MuxDriver *d = chr->opaque;
405 int m = d->focus;
406
407 if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
408 return 1;
409 if (d->chr_can_read[m])
410 return d->chr_can_read[m](d->ext_opaque[m]);
411 return 0;
412 }
413
414 static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
415 {
416 CharDriverState *chr = opaque;
417 MuxDriver *d = chr->opaque;
418 int m = d->focus;
419 int i;
420
421 mux_chr_accept_input (opaque);
422
423 for(i = 0; i < size; i++)
424 if (mux_proc_byte(chr, d, buf[i])) {
425 if (d->prod[m] == d->cons[m] &&
426 d->chr_can_read[m] &&
427 d->chr_can_read[m](d->ext_opaque[m]))
428 d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
429 else
430 d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
431 }
432 }
433
434 static void mux_chr_event(void *opaque, int event)
435 {
436 CharDriverState *chr = opaque;
437 MuxDriver *d = chr->opaque;
438 int i;
439
440 /* Send the event to all registered listeners */
441 for (i = 0; i < d->mux_cnt; i++)
442 mux_chr_send_event(d, i, event);
443 }
444
445 static void mux_chr_update_read_handler(CharDriverState *chr)
446 {
447 MuxDriver *d = chr->opaque;
448
449 if (d->mux_cnt >= MAX_MUX) {
450 fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
451 return;
452 }
453 d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
454 d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
455 d->chr_read[d->mux_cnt] = chr->chr_read;
456 d->chr_event[d->mux_cnt] = chr->chr_event;
457 /* Fix up the real driver with mux routines */
458 if (d->mux_cnt == 0) {
459 qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
460 mux_chr_event, chr);
461 }
462 if (d->focus != -1) {
463 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
464 }
465 d->focus = d->mux_cnt;
466 d->mux_cnt++;
467 mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
468 }
469
470 static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
471 {
472 CharDriverState *chr;
473 MuxDriver *d;
474
475 chr = g_malloc0(sizeof(CharDriverState));
476 d = g_malloc0(sizeof(MuxDriver));
477
478 chr->opaque = d;
479 d->drv = drv;
480 d->focus = -1;
481 chr->chr_write = mux_chr_write;
482 chr->chr_update_read_handler = mux_chr_update_read_handler;
483 chr->chr_accept_input = mux_chr_accept_input;
484 /* Frontend guest-open / -close notification is not support with muxes */
485 chr->chr_guest_open = NULL;
486 chr->chr_guest_close = NULL;
487
488 /* Muxes are always open on creation */
489 qemu_chr_generic_open(chr);
490
491 return chr;
492 }
493
494
495 #ifdef _WIN32
496 int send_all(int fd, const void *buf, int len1)
497 {
498 int ret, len;
499
500 len = len1;
501 while (len > 0) {
502 ret = send(fd, buf, len, 0);
503 if (ret < 0) {
504 errno = WSAGetLastError();
505 if (errno != WSAEWOULDBLOCK) {
506 return -1;
507 }
508 } else if (ret == 0) {
509 break;
510 } else {
511 buf += ret;
512 len -= ret;
513 }
514 }
515 return len1 - len;
516 }
517
518 #else
519
520 int send_all(int fd, const void *_buf, int len1)
521 {
522 int ret, len;
523 const uint8_t *buf = _buf;
524
525 len = len1;
526 while (len > 0) {
527 ret = write(fd, buf, len);
528 if (ret < 0) {
529 if (errno != EINTR && errno != EAGAIN)
530 return -1;
531 } else if (ret == 0) {
532 break;
533 } else {
534 buf += ret;
535 len -= ret;
536 }
537 }
538 return len1 - len;
539 }
540 #endif /* !_WIN32 */
541
542 #define STDIO_MAX_CLIENTS 1
543 static int stdio_nb_clients;
544
545 #ifndef _WIN32
546
547 typedef struct {
548 int fd_in, fd_out;
549 int max_size;
550 } FDCharDriver;
551
552
553 static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
554 {
555 FDCharDriver *s = chr->opaque;
556 return send_all(s->fd_out, buf, len);
557 }
558
559 static int fd_chr_read_poll(void *opaque)
560 {
561 CharDriverState *chr = opaque;
562 FDCharDriver *s = chr->opaque;
563
564 s->max_size = qemu_chr_be_can_write(chr);
565 return s->max_size;
566 }
567
568 static void fd_chr_read(void *opaque)
569 {
570 CharDriverState *chr = opaque;
571 FDCharDriver *s = chr->opaque;
572 int size, len;
573 uint8_t buf[READ_BUF_LEN];
574
575 len = sizeof(buf);
576 if (len > s->max_size)
577 len = s->max_size;
578 if (len == 0)
579 return;
580 size = read(s->fd_in, buf, len);
581 if (size == 0) {
582 /* FD has been closed. Remove it from the active list. */
583 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
584 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
585 return;
586 }
587 if (size > 0) {
588 qemu_chr_be_write(chr, buf, size);
589 }
590 }
591
592 static void fd_chr_update_read_handler(CharDriverState *chr)
593 {
594 FDCharDriver *s = chr->opaque;
595
596 if (s->fd_in >= 0) {
597 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
598 } else {
599 qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll,
600 fd_chr_read, NULL, chr);
601 }
602 }
603 }
604
605 static void fd_chr_close(struct CharDriverState *chr)
606 {
607 FDCharDriver *s = chr->opaque;
608
609 if (s->fd_in >= 0) {
610 if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
611 } else {
612 qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
613 }
614 }
615
616 g_free(s);
617 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
618 }
619
620 /* open a character device to a unix fd */
621 static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
622 {
623 CharDriverState *chr;
624 FDCharDriver *s;
625
626 chr = g_malloc0(sizeof(CharDriverState));
627 s = g_malloc0(sizeof(FDCharDriver));
628 s->fd_in = fd_in;
629 s->fd_out = fd_out;
630 chr->opaque = s;
631 chr->chr_write = fd_chr_write;
632 chr->chr_update_read_handler = fd_chr_update_read_handler;
633 chr->chr_close = fd_chr_close;
634
635 qemu_chr_generic_open(chr);
636
637 return chr;
638 }
639
640 static CharDriverState *qemu_chr_open_file_out(QemuOpts *opts)
641 {
642 int fd_out;
643
644 TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
645 O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
646 if (fd_out < 0) {
647 return NULL;
648 }
649 return qemu_chr_open_fd(-1, fd_out);
650 }
651
652 static CharDriverState *qemu_chr_open_pipe(QemuOpts *opts)
653 {
654 int fd_in, fd_out;
655 char filename_in[256], filename_out[256];
656 const char *filename = qemu_opt_get(opts, "path");
657
658 if (filename == NULL) {
659 fprintf(stderr, "chardev: pipe: no filename given\n");
660 return NULL;
661 }
662
663 snprintf(filename_in, 256, "%s.in", filename);
664 snprintf(filename_out, 256, "%s.out", filename);
665 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
666 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
667 if (fd_in < 0 || fd_out < 0) {
668 if (fd_in >= 0)
669 close(fd_in);
670 if (fd_out >= 0)
671 close(fd_out);
672 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
673 if (fd_in < 0) {
674 return NULL;
675 }
676 }
677 return qemu_chr_open_fd(fd_in, fd_out);
678 }
679
680
681 /* for STDIO, we handle the case where several clients use it
682 (nographic mode) */
683
684 #define TERM_FIFO_MAX_SIZE 1
685
686 static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
687 static int term_fifo_size;
688
689 static int stdio_read_poll(void *opaque)
690 {
691 CharDriverState *chr = opaque;
692
693 /* try to flush the queue if needed */
694 if (term_fifo_size != 0 && qemu_chr_be_can_write(chr) > 0) {
695 qemu_chr_be_write(chr, term_fifo, 1);
696 term_fifo_size = 0;
697 }
698 /* see if we can absorb more chars */
699 if (term_fifo_size == 0)
700 return 1;
701 else
702 return 0;
703 }
704
705 static void stdio_read(void *opaque)
706 {
707 int size;
708 uint8_t buf[1];
709 CharDriverState *chr = opaque;
710
711 size = read(0, buf, 1);
712 if (size == 0) {
713 /* stdin has been closed. Remove it from the active list. */
714 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
715 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
716 return;
717 }
718 if (size > 0) {
719 if (qemu_chr_be_can_write(chr) > 0) {
720 qemu_chr_be_write(chr, buf, 1);
721 } else if (term_fifo_size == 0) {
722 term_fifo[term_fifo_size++] = buf[0];
723 }
724 }
725 }
726
727 /* init terminal so that we can grab keys */
728 static struct termios oldtty;
729 static int old_fd0_flags;
730 static bool stdio_allow_signal;
731
732 static void term_exit(void)
733 {
734 tcsetattr (0, TCSANOW, &oldtty);
735 fcntl(0, F_SETFL, old_fd0_flags);
736 }
737
738 static void qemu_chr_set_echo_stdio(CharDriverState *chr, bool echo)
739 {
740 struct termios tty;
741
742 tty = oldtty;
743 if (!echo) {
744 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
745 |INLCR|IGNCR|ICRNL|IXON);
746 tty.c_oflag |= OPOST;
747 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
748 tty.c_cflag &= ~(CSIZE|PARENB);
749 tty.c_cflag |= CS8;
750 tty.c_cc[VMIN] = 1;
751 tty.c_cc[VTIME] = 0;
752 }
753 /* if graphical mode, we allow Ctrl-C handling */
754 if (!stdio_allow_signal)
755 tty.c_lflag &= ~ISIG;
756
757 tcsetattr (0, TCSANOW, &tty);
758 }
759
760 static void qemu_chr_close_stdio(struct CharDriverState *chr)
761 {
762 term_exit();
763 stdio_nb_clients--;
764 qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
765 fd_chr_close(chr);
766 }
767
768 static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts)
769 {
770 CharDriverState *chr;
771
772 if (stdio_nb_clients >= STDIO_MAX_CLIENTS) {
773 return NULL;
774 }
775 if (stdio_nb_clients == 0) {
776 old_fd0_flags = fcntl(0, F_GETFL);
777 tcgetattr (0, &oldtty);
778 fcntl(0, F_SETFL, O_NONBLOCK);
779 atexit(term_exit);
780 }
781
782 chr = qemu_chr_open_fd(0, 1);
783 chr->chr_close = qemu_chr_close_stdio;
784 chr->chr_set_echo = qemu_chr_set_echo_stdio;
785 qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
786 stdio_nb_clients++;
787 stdio_allow_signal = qemu_opt_get_bool(opts, "signal",
788 display_type != DT_NOGRAPHIC);
789 qemu_chr_fe_set_echo(chr, false);
790
791 return chr;
792 }
793
794 #ifdef __sun__
795 /* Once Solaris has openpty(), this is going to be removed. */
796 static int openpty(int *amaster, int *aslave, char *name,
797 struct termios *termp, struct winsize *winp)
798 {
799 const char *slave;
800 int mfd = -1, sfd = -1;
801
802 *amaster = *aslave = -1;
803
804 mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
805 if (mfd < 0)
806 goto err;
807
808 if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
809 goto err;
810
811 if ((slave = ptsname(mfd)) == NULL)
812 goto err;
813
814 if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
815 goto err;
816
817 if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
818 (termp != NULL && tcgetattr(sfd, termp) < 0))
819 goto err;
820
821 if (amaster)
822 *amaster = mfd;
823 if (aslave)
824 *aslave = sfd;
825 if (winp)
826 ioctl(sfd, TIOCSWINSZ, winp);
827
828 return 0;
829
830 err:
831 if (sfd != -1)
832 close(sfd);
833 close(mfd);
834 return -1;
835 }
836
837 static void cfmakeraw (struct termios *termios_p)
838 {
839 termios_p->c_iflag &=
840 ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
841 termios_p->c_oflag &= ~OPOST;
842 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
843 termios_p->c_cflag &= ~(CSIZE|PARENB);
844 termios_p->c_cflag |= CS8;
845
846 termios_p->c_cc[VMIN] = 0;
847 termios_p->c_cc[VTIME] = 0;
848 }
849 #endif
850
851 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
852 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
853 || defined(__GLIBC__)
854
855 typedef struct {
856 int fd;
857 int connected;
858 int polling;
859 int read_bytes;
860 QEMUTimer *timer;
861 } PtyCharDriver;
862
863 static void pty_chr_update_read_handler(CharDriverState *chr);
864 static void pty_chr_state(CharDriverState *chr, int connected);
865
866 static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
867 {
868 PtyCharDriver *s = chr->opaque;
869
870 if (!s->connected) {
871 /* guest sends data, check for (re-)connect */
872 pty_chr_update_read_handler(chr);
873 return 0;
874 }
875 return send_all(s->fd, buf, len);
876 }
877
878 static int pty_chr_read_poll(void *opaque)
879 {
880 CharDriverState *chr = opaque;
881 PtyCharDriver *s = chr->opaque;
882
883 s->read_bytes = qemu_chr_be_can_write(chr);
884 return s->read_bytes;
885 }
886
887 static void pty_chr_read(void *opaque)
888 {
889 CharDriverState *chr = opaque;
890 PtyCharDriver *s = chr->opaque;
891 int size, len;
892 uint8_t buf[READ_BUF_LEN];
893
894 len = sizeof(buf);
895 if (len > s->read_bytes)
896 len = s->read_bytes;
897 if (len == 0)
898 return;
899 size = read(s->fd, buf, len);
900 if ((size == -1 && errno == EIO) ||
901 (size == 0)) {
902 pty_chr_state(chr, 0);
903 return;
904 }
905 if (size > 0) {
906 pty_chr_state(chr, 1);
907 qemu_chr_be_write(chr, buf, size);
908 }
909 }
910
911 static void pty_chr_update_read_handler(CharDriverState *chr)
912 {
913 PtyCharDriver *s = chr->opaque;
914
915 qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
916 pty_chr_read, NULL, chr);
917 s->polling = 1;
918 /*
919 * Short timeout here: just need wait long enougth that qemu makes
920 * it through the poll loop once. When reconnected we want a
921 * short timeout so we notice it almost instantly. Otherwise
922 * read() gives us -EIO instantly, making pty_chr_state() reset the
923 * timeout to the normal (much longer) poll interval before the
924 * timer triggers.
925 */
926 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 10);
927 }
928
929 static void pty_chr_state(CharDriverState *chr, int connected)
930 {
931 PtyCharDriver *s = chr->opaque;
932
933 if (!connected) {
934 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
935 s->connected = 0;
936 s->polling = 0;
937 /* (re-)connect poll interval for idle guests: once per second.
938 * We check more frequently in case the guests sends data to
939 * the virtual device linked to our pty. */
940 qemu_mod_timer(s->timer, qemu_get_clock_ms(rt_clock) + 1000);
941 } else {
942 if (!s->connected)
943 qemu_chr_generic_open(chr);
944 s->connected = 1;
945 }
946 }
947
948 static void pty_chr_timer(void *opaque)
949 {
950 struct CharDriverState *chr = opaque;
951 PtyCharDriver *s = chr->opaque;
952
953 if (s->connected)
954 return;
955 if (s->polling) {
956 /* If we arrive here without polling being cleared due
957 * read returning -EIO, then we are (re-)connected */
958 pty_chr_state(chr, 1);
959 return;
960 }
961
962 /* Next poll ... */
963 pty_chr_update_read_handler(chr);
964 }
965
966 static void pty_chr_close(struct CharDriverState *chr)
967 {
968 PtyCharDriver *s = chr->opaque;
969
970 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
971 close(s->fd);
972 qemu_del_timer(s->timer);
973 qemu_free_timer(s->timer);
974 g_free(s);
975 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
976 }
977
978 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
979 {
980 CharDriverState *chr;
981 PtyCharDriver *s;
982 struct termios tty;
983 int master_fd, slave_fd, len;
984 #if defined(__OpenBSD__) || defined(__DragonFly__)
985 char pty_name[PATH_MAX];
986 #define q_ptsname(x) pty_name
987 #else
988 char *pty_name = NULL;
989 #define q_ptsname(x) ptsname(x)
990 #endif
991
992 if (openpty(&master_fd, &slave_fd, pty_name, NULL, NULL) < 0) {
993 return NULL;
994 }
995
996 /* Set raw attributes on the pty. */
997 tcgetattr(slave_fd, &tty);
998 cfmakeraw(&tty);
999 tcsetattr(slave_fd, TCSAFLUSH, &tty);
1000 close(slave_fd);
1001
1002 chr = g_malloc0(sizeof(CharDriverState));
1003
1004 len = strlen(q_ptsname(master_fd)) + 5;
1005 chr->filename = g_malloc(len);
1006 snprintf(chr->filename, len, "pty:%s", q_ptsname(master_fd));
1007 qemu_opt_set(opts, "path", q_ptsname(master_fd));
1008 fprintf(stderr, "char device redirected to %s\n", q_ptsname(master_fd));
1009
1010 s = g_malloc0(sizeof(PtyCharDriver));
1011 chr->opaque = s;
1012 chr->chr_write = pty_chr_write;
1013 chr->chr_update_read_handler = pty_chr_update_read_handler;
1014 chr->chr_close = pty_chr_close;
1015
1016 s->fd = master_fd;
1017 s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr);
1018
1019 return chr;
1020 }
1021
1022 static void tty_serial_init(int fd, int speed,
1023 int parity, int data_bits, int stop_bits)
1024 {
1025 struct termios tty;
1026 speed_t spd;
1027
1028 #if 0
1029 printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
1030 speed, parity, data_bits, stop_bits);
1031 #endif
1032 tcgetattr (fd, &tty);
1033
1034 #define check_speed(val) if (speed <= val) { spd = B##val; break; }
1035 speed = speed * 10 / 11;
1036 do {
1037 check_speed(50);
1038 check_speed(75);
1039 check_speed(110);
1040 check_speed(134);
1041 check_speed(150);
1042 check_speed(200);
1043 check_speed(300);
1044 check_speed(600);
1045 check_speed(1200);
1046 check_speed(1800);
1047 check_speed(2400);
1048 check_speed(4800);
1049 check_speed(9600);
1050 check_speed(19200);
1051 check_speed(38400);
1052 /* Non-Posix values follow. They may be unsupported on some systems. */
1053 check_speed(57600);
1054 check_speed(115200);
1055 #ifdef B230400
1056 check_speed(230400);
1057 #endif
1058 #ifdef B460800
1059 check_speed(460800);
1060 #endif
1061 #ifdef B500000
1062 check_speed(500000);
1063 #endif
1064 #ifdef B576000
1065 check_speed(576000);
1066 #endif
1067 #ifdef B921600
1068 check_speed(921600);
1069 #endif
1070 #ifdef B1000000
1071 check_speed(1000000);
1072 #endif
1073 #ifdef B1152000
1074 check_speed(1152000);
1075 #endif
1076 #ifdef B1500000
1077 check_speed(1500000);
1078 #endif
1079 #ifdef B2000000
1080 check_speed(2000000);
1081 #endif
1082 #ifdef B2500000
1083 check_speed(2500000);
1084 #endif
1085 #ifdef B3000000
1086 check_speed(3000000);
1087 #endif
1088 #ifdef B3500000
1089 check_speed(3500000);
1090 #endif
1091 #ifdef B4000000
1092 check_speed(4000000);
1093 #endif
1094 spd = B115200;
1095 } while (0);
1096
1097 cfsetispeed(&tty, spd);
1098 cfsetospeed(&tty, spd);
1099
1100 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
1101 |INLCR|IGNCR|ICRNL|IXON);
1102 tty.c_oflag |= OPOST;
1103 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
1104 tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
1105 switch(data_bits) {
1106 default:
1107 case 8:
1108 tty.c_cflag |= CS8;
1109 break;
1110 case 7:
1111 tty.c_cflag |= CS7;
1112 break;
1113 case 6:
1114 tty.c_cflag |= CS6;
1115 break;
1116 case 5:
1117 tty.c_cflag |= CS5;
1118 break;
1119 }
1120 switch(parity) {
1121 default:
1122 case 'N':
1123 break;
1124 case 'E':
1125 tty.c_cflag |= PARENB;
1126 break;
1127 case 'O':
1128 tty.c_cflag |= PARENB | PARODD;
1129 break;
1130 }
1131 if (stop_bits == 2)
1132 tty.c_cflag |= CSTOPB;
1133
1134 tcsetattr (fd, TCSANOW, &tty);
1135 }
1136
1137 static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
1138 {
1139 FDCharDriver *s = chr->opaque;
1140
1141 switch(cmd) {
1142 case CHR_IOCTL_SERIAL_SET_PARAMS:
1143 {
1144 QEMUSerialSetParams *ssp = arg;
1145 tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
1146 ssp->data_bits, ssp->stop_bits);
1147 }
1148 break;
1149 case CHR_IOCTL_SERIAL_SET_BREAK:
1150 {
1151 int enable = *(int *)arg;
1152 if (enable)
1153 tcsendbreak(s->fd_in, 1);
1154 }
1155 break;
1156 case CHR_IOCTL_SERIAL_GET_TIOCM:
1157 {
1158 int sarg = 0;
1159 int *targ = (int *)arg;
1160 ioctl(s->fd_in, TIOCMGET, &sarg);
1161 *targ = 0;
1162 if (sarg & TIOCM_CTS)
1163 *targ |= CHR_TIOCM_CTS;
1164 if (sarg & TIOCM_CAR)
1165 *targ |= CHR_TIOCM_CAR;
1166 if (sarg & TIOCM_DSR)
1167 *targ |= CHR_TIOCM_DSR;
1168 if (sarg & TIOCM_RI)
1169 *targ |= CHR_TIOCM_RI;
1170 if (sarg & TIOCM_DTR)
1171 *targ |= CHR_TIOCM_DTR;
1172 if (sarg & TIOCM_RTS)
1173 *targ |= CHR_TIOCM_RTS;
1174 }
1175 break;
1176 case CHR_IOCTL_SERIAL_SET_TIOCM:
1177 {
1178 int sarg = *(int *)arg;
1179 int targ = 0;
1180 ioctl(s->fd_in, TIOCMGET, &targ);
1181 targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
1182 | CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
1183 if (sarg & CHR_TIOCM_CTS)
1184 targ |= TIOCM_CTS;
1185 if (sarg & CHR_TIOCM_CAR)
1186 targ |= TIOCM_CAR;
1187 if (sarg & CHR_TIOCM_DSR)
1188 targ |= TIOCM_DSR;
1189 if (sarg & CHR_TIOCM_RI)
1190 targ |= TIOCM_RI;
1191 if (sarg & CHR_TIOCM_DTR)
1192 targ |= TIOCM_DTR;
1193 if (sarg & CHR_TIOCM_RTS)
1194 targ |= TIOCM_RTS;
1195 ioctl(s->fd_in, TIOCMSET, &targ);
1196 }
1197 break;
1198 default:
1199 return -ENOTSUP;
1200 }
1201 return 0;
1202 }
1203
1204 static void qemu_chr_close_tty(CharDriverState *chr)
1205 {
1206 FDCharDriver *s = chr->opaque;
1207 int fd = -1;
1208
1209 if (s) {
1210 fd = s->fd_in;
1211 }
1212
1213 fd_chr_close(chr);
1214
1215 if (fd >= 0) {
1216 close(fd);
1217 }
1218 }
1219
1220 static CharDriverState *qemu_chr_open_tty(QemuOpts *opts)
1221 {
1222 const char *filename = qemu_opt_get(opts, "path");
1223 CharDriverState *chr;
1224 int fd;
1225
1226 TFR(fd = qemu_open(filename, O_RDWR | O_NONBLOCK));
1227 if (fd < 0) {
1228 return NULL;
1229 }
1230 tty_serial_init(fd, 115200, 'N', 8, 1);
1231 chr = qemu_chr_open_fd(fd, fd);
1232 chr->chr_ioctl = tty_serial_ioctl;
1233 chr->chr_close = qemu_chr_close_tty;
1234 return chr;
1235 }
1236 #else /* ! __linux__ && ! __sun__ */
1237 static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
1238 {
1239 return NULL;
1240 }
1241 #endif /* __linux__ || __sun__ */
1242
1243 #if defined(__linux__)
1244 typedef struct {
1245 int fd;
1246 int mode;
1247 } ParallelCharDriver;
1248
1249 static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
1250 {
1251 if (s->mode != mode) {
1252 int m = mode;
1253 if (ioctl(s->fd, PPSETMODE, &m) < 0)
1254 return 0;
1255 s->mode = mode;
1256 }
1257 return 1;
1258 }
1259
1260 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1261 {
1262 ParallelCharDriver *drv = chr->opaque;
1263 int fd = drv->fd;
1264 uint8_t b;
1265
1266 switch(cmd) {
1267 case CHR_IOCTL_PP_READ_DATA:
1268 if (ioctl(fd, PPRDATA, &b) < 0)
1269 return -ENOTSUP;
1270 *(uint8_t *)arg = b;
1271 break;
1272 case CHR_IOCTL_PP_WRITE_DATA:
1273 b = *(uint8_t *)arg;
1274 if (ioctl(fd, PPWDATA, &b) < 0)
1275 return -ENOTSUP;
1276 break;
1277 case CHR_IOCTL_PP_READ_CONTROL:
1278 if (ioctl(fd, PPRCONTROL, &b) < 0)
1279 return -ENOTSUP;
1280 /* Linux gives only the lowest bits, and no way to know data
1281 direction! For better compatibility set the fixed upper
1282 bits. */
1283 *(uint8_t *)arg = b | 0xc0;
1284 break;
1285 case CHR_IOCTL_PP_WRITE_CONTROL:
1286 b = *(uint8_t *)arg;
1287 if (ioctl(fd, PPWCONTROL, &b) < 0)
1288 return -ENOTSUP;
1289 break;
1290 case CHR_IOCTL_PP_READ_STATUS:
1291 if (ioctl(fd, PPRSTATUS, &b) < 0)
1292 return -ENOTSUP;
1293 *(uint8_t *)arg = b;
1294 break;
1295 case CHR_IOCTL_PP_DATA_DIR:
1296 if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
1297 return -ENOTSUP;
1298 break;
1299 case CHR_IOCTL_PP_EPP_READ_ADDR:
1300 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1301 struct ParallelIOArg *parg = arg;
1302 int n = read(fd, parg->buffer, parg->count);
1303 if (n != parg->count) {
1304 return -EIO;
1305 }
1306 }
1307 break;
1308 case CHR_IOCTL_PP_EPP_READ:
1309 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1310 struct ParallelIOArg *parg = arg;
1311 int n = read(fd, parg->buffer, parg->count);
1312 if (n != parg->count) {
1313 return -EIO;
1314 }
1315 }
1316 break;
1317 case CHR_IOCTL_PP_EPP_WRITE_ADDR:
1318 if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
1319 struct ParallelIOArg *parg = arg;
1320 int n = write(fd, parg->buffer, parg->count);
1321 if (n != parg->count) {
1322 return -EIO;
1323 }
1324 }
1325 break;
1326 case CHR_IOCTL_PP_EPP_WRITE:
1327 if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
1328 struct ParallelIOArg *parg = arg;
1329 int n = write(fd, parg->buffer, parg->count);
1330 if (n != parg->count) {
1331 return -EIO;
1332 }
1333 }
1334 break;
1335 default:
1336 return -ENOTSUP;
1337 }
1338 return 0;
1339 }
1340
1341 static void pp_close(CharDriverState *chr)
1342 {
1343 ParallelCharDriver *drv = chr->opaque;
1344 int fd = drv->fd;
1345
1346 pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
1347 ioctl(fd, PPRELEASE);
1348 close(fd);
1349 g_free(drv);
1350 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1351 }
1352
1353 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1354 {
1355 const char *filename = qemu_opt_get(opts, "path");
1356 CharDriverState *chr;
1357 ParallelCharDriver *drv;
1358 int fd;
1359
1360 TFR(fd = qemu_open(filename, O_RDWR));
1361 if (fd < 0) {
1362 return NULL;
1363 }
1364
1365 if (ioctl(fd, PPCLAIM) < 0) {
1366 close(fd);
1367 return NULL;
1368 }
1369
1370 drv = g_malloc0(sizeof(ParallelCharDriver));
1371 drv->fd = fd;
1372 drv->mode = IEEE1284_MODE_COMPAT;
1373
1374 chr = g_malloc0(sizeof(CharDriverState));
1375 chr->chr_write = null_chr_write;
1376 chr->chr_ioctl = pp_ioctl;
1377 chr->chr_close = pp_close;
1378 chr->opaque = drv;
1379
1380 qemu_chr_generic_open(chr);
1381
1382 return chr;
1383 }
1384 #endif /* __linux__ */
1385
1386 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
1387 static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
1388 {
1389 int fd = (int)(intptr_t)chr->opaque;
1390 uint8_t b;
1391
1392 switch(cmd) {
1393 case CHR_IOCTL_PP_READ_DATA:
1394 if (ioctl(fd, PPIGDATA, &b) < 0)
1395 return -ENOTSUP;
1396 *(uint8_t *)arg = b;
1397 break;
1398 case CHR_IOCTL_PP_WRITE_DATA:
1399 b = *(uint8_t *)arg;
1400 if (ioctl(fd, PPISDATA, &b) < 0)
1401 return -ENOTSUP;
1402 break;
1403 case CHR_IOCTL_PP_READ_CONTROL:
1404 if (ioctl(fd, PPIGCTRL, &b) < 0)
1405 return -ENOTSUP;
1406 *(uint8_t *)arg = b;
1407 break;
1408 case CHR_IOCTL_PP_WRITE_CONTROL:
1409 b = *(uint8_t *)arg;
1410 if (ioctl(fd, PPISCTRL, &b) < 0)
1411 return -ENOTSUP;
1412 break;
1413 case CHR_IOCTL_PP_READ_STATUS:
1414 if (ioctl(fd, PPIGSTATUS, &b) < 0)
1415 return -ENOTSUP;
1416 *(uint8_t *)arg = b;
1417 break;
1418 default:
1419 return -ENOTSUP;
1420 }
1421 return 0;
1422 }
1423
1424 static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
1425 {
1426 const char *filename = qemu_opt_get(opts, "path");
1427 CharDriverState *chr;
1428 int fd;
1429
1430 fd = qemu_open(filename, O_RDWR);
1431 if (fd < 0) {
1432 return NULL;
1433 }
1434
1435 chr = g_malloc0(sizeof(CharDriverState));
1436 chr->opaque = (void *)(intptr_t)fd;
1437 chr->chr_write = null_chr_write;
1438 chr->chr_ioctl = pp_ioctl;
1439 return chr;
1440 }
1441 #endif
1442
1443 #else /* _WIN32 */
1444
1445 static CharDriverState *stdio_clients[STDIO_MAX_CLIENTS];
1446
1447 typedef struct {
1448 int max_size;
1449 HANDLE hcom, hrecv, hsend;
1450 OVERLAPPED orecv, osend;
1451 BOOL fpipe;
1452 DWORD len;
1453 } WinCharState;
1454
1455 typedef struct {
1456 HANDLE hStdIn;
1457 HANDLE hInputReadyEvent;
1458 HANDLE hInputDoneEvent;
1459 HANDLE hInputThread;
1460 uint8_t win_stdio_buf;
1461 } WinStdioCharState;
1462
1463 #define NSENDBUF 2048
1464 #define NRECVBUF 2048
1465 #define MAXCONNECT 1
1466 #define NTIMEOUT 5000
1467
1468 static int win_chr_poll(void *opaque);
1469 static int win_chr_pipe_poll(void *opaque);
1470
1471 static void win_chr_close(CharDriverState *chr)
1472 {
1473 WinCharState *s = chr->opaque;
1474
1475 if (s->hsend) {
1476 CloseHandle(s->hsend);
1477 s->hsend = NULL;
1478 }
1479 if (s->hrecv) {
1480 CloseHandle(s->hrecv);
1481 s->hrecv = NULL;
1482 }
1483 if (s->hcom) {
1484 CloseHandle(s->hcom);
1485 s->hcom = NULL;
1486 }
1487 if (s->fpipe)
1488 qemu_del_polling_cb(win_chr_pipe_poll, chr);
1489 else
1490 qemu_del_polling_cb(win_chr_poll, chr);
1491
1492 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
1493 }
1494
1495 static int win_chr_init(CharDriverState *chr, const char *filename)
1496 {
1497 WinCharState *s = chr->opaque;
1498 COMMCONFIG comcfg;
1499 COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
1500 COMSTAT comstat;
1501 DWORD size;
1502 DWORD err;
1503
1504 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1505 if (!s->hsend) {
1506 fprintf(stderr, "Failed CreateEvent\n");
1507 goto fail;
1508 }
1509 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1510 if (!s->hrecv) {
1511 fprintf(stderr, "Failed CreateEvent\n");
1512 goto fail;
1513 }
1514
1515 s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
1516 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
1517 if (s->hcom == INVALID_HANDLE_VALUE) {
1518 fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
1519 s->hcom = NULL;
1520 goto fail;
1521 }
1522
1523 if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
1524 fprintf(stderr, "Failed SetupComm\n");
1525 goto fail;
1526 }
1527
1528 ZeroMemory(&comcfg, sizeof(COMMCONFIG));
1529 size = sizeof(COMMCONFIG);
1530 GetDefaultCommConfig(filename, &comcfg, &size);
1531 comcfg.dcb.DCBlength = sizeof(DCB);
1532 CommConfigDialog(filename, NULL, &comcfg);
1533
1534 if (!SetCommState(s->hcom, &comcfg.dcb)) {
1535 fprintf(stderr, "Failed SetCommState\n");
1536 goto fail;
1537 }
1538
1539 if (!SetCommMask(s->hcom, EV_ERR)) {
1540 fprintf(stderr, "Failed SetCommMask\n");
1541 goto fail;
1542 }
1543
1544 cto.ReadIntervalTimeout = MAXDWORD;
1545 if (!SetCommTimeouts(s->hcom, &cto)) {
1546 fprintf(stderr, "Failed SetCommTimeouts\n");
1547 goto fail;
1548 }
1549
1550 if (!ClearCommError(s->hcom, &err, &comstat)) {
1551 fprintf(stderr, "Failed ClearCommError\n");
1552 goto fail;
1553 }
1554 qemu_add_polling_cb(win_chr_poll, chr);
1555 return 0;
1556
1557 fail:
1558 win_chr_close(chr);
1559 return -1;
1560 }
1561
1562 static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
1563 {
1564 WinCharState *s = chr->opaque;
1565 DWORD len, ret, size, err;
1566
1567 len = len1;
1568 ZeroMemory(&s->osend, sizeof(s->osend));
1569 s->osend.hEvent = s->hsend;
1570 while (len > 0) {
1571 if (s->hsend)
1572 ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
1573 else
1574 ret = WriteFile(s->hcom, buf, len, &size, NULL);
1575 if (!ret) {
1576 err = GetLastError();
1577 if (err == ERROR_IO_PENDING) {
1578 ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
1579 if (ret) {
1580 buf += size;
1581 len -= size;
1582 } else {
1583 break;
1584 }
1585 } else {
1586 break;
1587 }
1588 } else {
1589 buf += size;
1590 len -= size;
1591 }
1592 }
1593 return len1 - len;
1594 }
1595
1596 static int win_chr_read_poll(CharDriverState *chr)
1597 {
1598 WinCharState *s = chr->opaque;
1599
1600 s->max_size = qemu_chr_be_can_write(chr);
1601 return s->max_size;
1602 }
1603
1604 static void win_chr_readfile(CharDriverState *chr)
1605 {
1606 WinCharState *s = chr->opaque;
1607 int ret, err;
1608 uint8_t buf[READ_BUF_LEN];
1609 DWORD size;
1610
1611 ZeroMemory(&s->orecv, sizeof(s->orecv));
1612 s->orecv.hEvent = s->hrecv;
1613 ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
1614 if (!ret) {
1615 err = GetLastError();
1616 if (err == ERROR_IO_PENDING) {
1617 ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
1618 }
1619 }
1620
1621 if (size > 0) {
1622 qemu_chr_be_write(chr, buf, size);
1623 }
1624 }
1625
1626 static void win_chr_read(CharDriverState *chr)
1627 {
1628 WinCharState *s = chr->opaque;
1629
1630 if (s->len > s->max_size)
1631 s->len = s->max_size;
1632 if (s->len == 0)
1633 return;
1634
1635 win_chr_readfile(chr);
1636 }
1637
1638 static int win_chr_poll(void *opaque)
1639 {
1640 CharDriverState *chr = opaque;
1641 WinCharState *s = chr->opaque;
1642 COMSTAT status;
1643 DWORD comerr;
1644
1645 ClearCommError(s->hcom, &comerr, &status);
1646 if (status.cbInQue > 0) {
1647 s->len = status.cbInQue;
1648 win_chr_read_poll(chr);
1649 win_chr_read(chr);
1650 return 1;
1651 }
1652 return 0;
1653 }
1654
1655 static CharDriverState *qemu_chr_open_win(QemuOpts *opts)
1656 {
1657 const char *filename = qemu_opt_get(opts, "path");
1658 CharDriverState *chr;
1659 WinCharState *s;
1660
1661 chr = g_malloc0(sizeof(CharDriverState));
1662 s = g_malloc0(sizeof(WinCharState));
1663 chr->opaque = s;
1664 chr->chr_write = win_chr_write;
1665 chr->chr_close = win_chr_close;
1666
1667 if (win_chr_init(chr, filename) < 0) {
1668 g_free(s);
1669 g_free(chr);
1670 return NULL;
1671 }
1672 qemu_chr_generic_open(chr);
1673 return chr;
1674 }
1675
1676 static int win_chr_pipe_poll(void *opaque)
1677 {
1678 CharDriverState *chr = opaque;
1679 WinCharState *s = chr->opaque;
1680 DWORD size;
1681
1682 PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
1683 if (size > 0) {
1684 s->len = size;
1685 win_chr_read_poll(chr);
1686 win_chr_read(chr);
1687 return 1;
1688 }
1689 return 0;
1690 }
1691
1692 static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
1693 {
1694 WinCharState *s = chr->opaque;
1695 OVERLAPPED ov;
1696 int ret;
1697 DWORD size;
1698 char openname[256];
1699
1700 s->fpipe = TRUE;
1701
1702 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
1703 if (!s->hsend) {
1704 fprintf(stderr, "Failed CreateEvent\n");
1705 goto fail;
1706 }
1707 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
1708 if (!s->hrecv) {
1709 fprintf(stderr, "Failed CreateEvent\n");
1710 goto fail;
1711 }
1712
1713 snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
1714 s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
1715 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
1716 PIPE_WAIT,
1717 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
1718 if (s->hcom == INVALID_HANDLE_VALUE) {
1719 fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
1720 s->hcom = NULL;
1721 goto fail;
1722 }
1723
1724 ZeroMemory(&ov, sizeof(ov));
1725 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
1726 ret = ConnectNamedPipe(s->hcom, &ov);
1727 if (ret) {
1728 fprintf(stderr, "Failed ConnectNamedPipe\n");
1729 goto fail;
1730 }
1731
1732 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
1733 if (!ret) {
1734 fprintf(stderr, "Failed GetOverlappedResult\n");
1735 if (ov.hEvent) {
1736 CloseHandle(ov.hEvent);
1737 ov.hEvent = NULL;
1738 }
1739 goto fail;
1740 }
1741
1742 if (ov.hEvent) {
1743 CloseHandle(ov.hEvent);
1744 ov.hEvent = NULL;
1745 }
1746 qemu_add_polling_cb(win_chr_pipe_poll, chr);
1747 return 0;
1748
1749 fail:
1750 win_chr_close(chr);
1751 return -1;
1752 }
1753
1754
1755 static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts)
1756 {
1757 const char *filename = qemu_opt_get(opts, "path");
1758 CharDriverState *chr;
1759 WinCharState *s;
1760
1761 chr = g_malloc0(sizeof(CharDriverState));
1762 s = g_malloc0(sizeof(WinCharState));
1763 chr->opaque = s;
1764 chr->chr_write = win_chr_write;
1765 chr->chr_close = win_chr_close;
1766
1767 if (win_chr_pipe_init(chr, filename) < 0) {
1768 g_free(s);
1769 g_free(chr);
1770 return NULL;
1771 }
1772 qemu_chr_generic_open(chr);
1773 return chr;
1774 }
1775
1776 static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
1777 {
1778 CharDriverState *chr;
1779 WinCharState *s;
1780
1781 chr = g_malloc0(sizeof(CharDriverState));
1782 s = g_malloc0(sizeof(WinCharState));
1783 s->hcom = fd_out;
1784 chr->opaque = s;
1785 chr->chr_write = win_chr_write;
1786 qemu_chr_generic_open(chr);
1787 return chr;
1788 }
1789
1790 static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts)
1791 {
1792 return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
1793 }
1794
1795 static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts)
1796 {
1797 const char *file_out = qemu_opt_get(opts, "path");
1798 HANDLE fd_out;
1799
1800 fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
1801 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
1802 if (fd_out == INVALID_HANDLE_VALUE) {
1803 return NULL;
1804 }
1805
1806 return qemu_chr_open_win_file(fd_out);
1807 }
1808
1809 static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len)
1810 {
1811 HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
1812 DWORD dwSize;
1813 int len1;
1814
1815 len1 = len;
1816
1817 while (len1 > 0) {
1818 if (!WriteFile(hStdOut, buf, len1, &dwSize, NULL)) {
1819 break;
1820 }
1821 buf += dwSize;
1822 len1 -= dwSize;
1823 }
1824
1825 return len - len1;
1826 }
1827
1828 static void win_stdio_wait_func(void *opaque)
1829 {
1830 CharDriverState *chr = opaque;
1831 WinStdioCharState *stdio = chr->opaque;
1832 INPUT_RECORD buf[4];
1833 int ret;
1834 DWORD dwSize;
1835 int i;
1836
1837 ret = ReadConsoleInput(stdio->hStdIn, buf, sizeof(buf) / sizeof(*buf),
1838 &dwSize);
1839
1840 if (!ret) {
1841 /* Avoid error storm */
1842 qemu_del_wait_object(stdio->hStdIn, NULL, NULL);
1843 return;
1844 }
1845
1846 for (i = 0; i < dwSize; i++) {
1847 KEY_EVENT_RECORD *kev = &buf[i].Event.KeyEvent;
1848
1849 if (buf[i].EventType == KEY_EVENT && kev->bKeyDown) {
1850 int j;
1851 if (kev->uChar.AsciiChar != 0) {
1852 for (j = 0; j < kev->wRepeatCount; j++) {
1853 if (qemu_chr_be_can_write(chr)) {
1854 uint8_t c = kev->uChar.AsciiChar;
1855 qemu_chr_be_write(chr, &c, 1);
1856 }
1857 }
1858 }
1859 }
1860 }
1861 }
1862
1863 static DWORD WINAPI win_stdio_thread(LPVOID param)
1864 {
1865 CharDriverState *chr = param;
1866 WinStdioCharState *stdio = chr->opaque;
1867 int ret;
1868 DWORD dwSize;
1869
1870 while (1) {
1871
1872 /* Wait for one byte */
1873 ret = ReadFile(stdio->hStdIn, &stdio->win_stdio_buf, 1, &dwSize, NULL);
1874
1875 /* Exit in case of error, continue if nothing read */
1876 if (!ret) {
1877 break;
1878 }
1879 if (!dwSize) {
1880 continue;
1881 }
1882
1883 /* Some terminal emulator returns \r\n for Enter, just pass \n */
1884 if (stdio->win_stdio_buf == '\r') {
1885 continue;
1886 }
1887
1888 /* Signal the main thread and wait until the byte was eaten */
1889 if (!SetEvent(stdio->hInputReadyEvent)) {
1890 break;
1891 }
1892 if (WaitForSingleObject(stdio->hInputDoneEvent, INFINITE)
1893 != WAIT_OBJECT_0) {
1894 break;
1895 }
1896 }
1897
1898 qemu_del_wait_object(stdio->hInputReadyEvent, NULL, NULL);
1899 return 0;
1900 }
1901
1902 static void win_stdio_thread_wait_func(void *opaque)
1903 {
1904 CharDriverState *chr = opaque;
1905 WinStdioCharState *stdio = chr->opaque;
1906
1907 if (qemu_chr_be_can_write(chr)) {
1908 qemu_chr_be_write(chr, &stdio->win_stdio_buf, 1);
1909 }
1910
1911 SetEvent(stdio->hInputDoneEvent);
1912 }
1913
1914 static void qemu_chr_set_echo_win_stdio(CharDriverState *chr, bool echo)
1915 {
1916 WinStdioCharState *stdio = chr->opaque;
1917 DWORD dwMode = 0;
1918
1919 GetConsoleMode(stdio->hStdIn, &dwMode);
1920
1921 if (echo) {
1922 SetConsoleMode(stdio->hStdIn, dwMode | ENABLE_ECHO_INPUT);
1923 } else {
1924 SetConsoleMode(stdio->hStdIn, dwMode & ~ENABLE_ECHO_INPUT);
1925 }
1926 }
1927
1928 static void win_stdio_close(CharDriverState *chr)
1929 {
1930 WinStdioCharState *stdio = chr->opaque;
1931
1932 if (stdio->hInputReadyEvent != INVALID_HANDLE_VALUE) {
1933 CloseHandle(stdio->hInputReadyEvent);
1934 }
1935 if (stdio->hInputDoneEvent != INVALID_HANDLE_VALUE) {
1936 CloseHandle(stdio->hInputDoneEvent);
1937 }
1938 if (stdio->hInputThread != INVALID_HANDLE_VALUE) {
1939 TerminateThread(stdio->hInputThread, 0);
1940 }
1941
1942 g_free(chr->opaque);
1943 g_free(chr);
1944 stdio_nb_clients--;
1945 }
1946
1947 static CharDriverState *qemu_chr_open_win_stdio(QemuOpts *opts)
1948 {
1949 CharDriverState *chr;
1950 WinStdioCharState *stdio;
1951 DWORD dwMode;
1952 int is_console = 0;
1953
1954 if (stdio_nb_clients >= STDIO_MAX_CLIENTS
1955 || ((display_type != DT_NOGRAPHIC) && (stdio_nb_clients != 0))) {
1956 return NULL;
1957 }
1958
1959 chr = g_malloc0(sizeof(CharDriverState));
1960 stdio = g_malloc0(sizeof(WinStdioCharState));
1961
1962 stdio->hStdIn = GetStdHandle(STD_INPUT_HANDLE);
1963 if (stdio->hStdIn == INVALID_HANDLE_VALUE) {
1964 fprintf(stderr, "cannot open stdio: invalid handle\n");
1965 exit(1);
1966 }
1967
1968 is_console = GetConsoleMode(stdio->hStdIn, &dwMode) != 0;
1969
1970 chr->opaque = stdio;
1971 chr->chr_write = win_stdio_write;
1972 chr->chr_close = win_stdio_close;
1973
1974 if (stdio_nb_clients == 0) {
1975 if (is_console) {
1976 if (qemu_add_wait_object(stdio->hStdIn,
1977 win_stdio_wait_func, chr)) {
1978 fprintf(stderr, "qemu_add_wait_object: failed\n");
1979 }
1980 } else {
1981 DWORD dwId;
1982
1983 stdio->hInputReadyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
1984 stdio->hInputDoneEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
1985 stdio->hInputThread = CreateThread(NULL, 0, win_stdio_thread,
1986 chr, 0, &dwId);
1987
1988 if (stdio->hInputThread == INVALID_HANDLE_VALUE
1989 || stdio->hInputReadyEvent == INVALID_HANDLE_VALUE
1990 || stdio->hInputDoneEvent == INVALID_HANDLE_VALUE) {
1991 fprintf(stderr, "cannot create stdio thread or event\n");
1992 exit(1);
1993 }
1994 if (qemu_add_wait_object(stdio->hInputReadyEvent,
1995 win_stdio_thread_wait_func, chr)) {
1996 fprintf(stderr, "qemu_add_wait_object: failed\n");
1997 }
1998 }
1999 }
2000
2001 dwMode |= ENABLE_LINE_INPUT;
2002
2003 stdio_clients[stdio_nb_clients++] = chr;
2004 if (stdio_nb_clients == 1 && is_console) {
2005 /* set the terminal in raw mode */
2006 /* ENABLE_QUICK_EDIT_MODE | ENABLE_EXTENDED_FLAGS */
2007 dwMode |= ENABLE_PROCESSED_INPUT;
2008 }
2009
2010 SetConsoleMode(stdio->hStdIn, dwMode);
2011
2012 chr->chr_set_echo = qemu_chr_set_echo_win_stdio;
2013 qemu_chr_fe_set_echo(chr, false);
2014
2015 return chr;
2016 }
2017 #endif /* !_WIN32 */
2018
2019 /***********************************************************/
2020 /* UDP Net console */
2021
2022 typedef struct {
2023 int fd;
2024 uint8_t buf[READ_BUF_LEN];
2025 int bufcnt;
2026 int bufptr;
2027 int max_size;
2028 } NetCharDriver;
2029
2030 static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2031 {
2032 NetCharDriver *s = chr->opaque;
2033
2034 return send(s->fd, (const void *)buf, len, 0);
2035 }
2036
2037 static int udp_chr_read_poll(void *opaque)
2038 {
2039 CharDriverState *chr = opaque;
2040 NetCharDriver *s = chr->opaque;
2041
2042 s->max_size = qemu_chr_be_can_write(chr);
2043
2044 /* If there were any stray characters in the queue process them
2045 * first
2046 */
2047 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2048 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2049 s->bufptr++;
2050 s->max_size = qemu_chr_be_can_write(chr);
2051 }
2052 return s->max_size;
2053 }
2054
2055 static void udp_chr_read(void *opaque)
2056 {
2057 CharDriverState *chr = opaque;
2058 NetCharDriver *s = chr->opaque;
2059
2060 if (s->max_size == 0)
2061 return;
2062 s->bufcnt = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0);
2063 s->bufptr = s->bufcnt;
2064 if (s->bufcnt <= 0)
2065 return;
2066
2067 s->bufptr = 0;
2068 while (s->max_size > 0 && s->bufptr < s->bufcnt) {
2069 qemu_chr_be_write(chr, &s->buf[s->bufptr], 1);
2070 s->bufptr++;
2071 s->max_size = qemu_chr_be_can_write(chr);
2072 }
2073 }
2074
2075 static void udp_chr_update_read_handler(CharDriverState *chr)
2076 {
2077 NetCharDriver *s = chr->opaque;
2078
2079 if (s->fd >= 0) {
2080 qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
2081 udp_chr_read, NULL, chr);
2082 }
2083 }
2084
2085 static void udp_chr_close(CharDriverState *chr)
2086 {
2087 NetCharDriver *s = chr->opaque;
2088 if (s->fd >= 0) {
2089 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2090 closesocket(s->fd);
2091 }
2092 g_free(s);
2093 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2094 }
2095
2096 static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
2097 {
2098 CharDriverState *chr = NULL;
2099 NetCharDriver *s = NULL;
2100 int fd = -1;
2101
2102 chr = g_malloc0(sizeof(CharDriverState));
2103 s = g_malloc0(sizeof(NetCharDriver));
2104
2105 fd = inet_dgram_opts(opts);
2106 if (fd < 0) {
2107 fprintf(stderr, "inet_dgram_opts failed\n");
2108 goto return_err;
2109 }
2110
2111 s->fd = fd;
2112 s->bufcnt = 0;
2113 s->bufptr = 0;
2114 chr->opaque = s;
2115 chr->chr_write = udp_chr_write;
2116 chr->chr_update_read_handler = udp_chr_update_read_handler;
2117 chr->chr_close = udp_chr_close;
2118 return chr;
2119
2120 return_err:
2121 g_free(chr);
2122 g_free(s);
2123 if (fd >= 0) {
2124 closesocket(fd);
2125 }
2126 return NULL;
2127 }
2128
2129 /***********************************************************/
2130 /* TCP Net console */
2131
2132 typedef struct {
2133 int fd, listen_fd;
2134 int connected;
2135 int max_size;
2136 int do_telnetopt;
2137 int do_nodelay;
2138 int is_unix;
2139 int msgfd;
2140 } TCPCharDriver;
2141
2142 static void tcp_chr_accept(void *opaque);
2143
2144 static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2145 {
2146 TCPCharDriver *s = chr->opaque;
2147 if (s->connected) {
2148 return send_all(s->fd, buf, len);
2149 } else {
2150 /* XXX: indicate an error ? */
2151 return len;
2152 }
2153 }
2154
2155 static int tcp_chr_read_poll(void *opaque)
2156 {
2157 CharDriverState *chr = opaque;
2158 TCPCharDriver *s = chr->opaque;
2159 if (!s->connected)
2160 return 0;
2161 s->max_size = qemu_chr_be_can_write(chr);
2162 return s->max_size;
2163 }
2164
2165 #define IAC 255
2166 #define IAC_BREAK 243
2167 static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
2168 TCPCharDriver *s,
2169 uint8_t *buf, int *size)
2170 {
2171 /* Handle any telnet client's basic IAC options to satisfy char by
2172 * char mode with no echo. All IAC options will be removed from
2173 * the buf and the do_telnetopt variable will be used to track the
2174 * state of the width of the IAC information.
2175 *
2176 * IAC commands come in sets of 3 bytes with the exception of the
2177 * "IAC BREAK" command and the double IAC.
2178 */
2179
2180 int i;
2181 int j = 0;
2182
2183 for (i = 0; i < *size; i++) {
2184 if (s->do_telnetopt > 1) {
2185 if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
2186 /* Double IAC means send an IAC */
2187 if (j != i)
2188 buf[j] = buf[i];
2189 j++;
2190 s->do_telnetopt = 1;
2191 } else {
2192 if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
2193 /* Handle IAC break commands by sending a serial break */
2194 qemu_chr_be_event(chr, CHR_EVENT_BREAK);
2195 s->do_telnetopt++;
2196 }
2197 s->do_telnetopt++;
2198 }
2199 if (s->do_telnetopt >= 4) {
2200 s->do_telnetopt = 1;
2201 }
2202 } else {
2203 if ((unsigned char)buf[i] == IAC) {
2204 s->do_telnetopt = 2;
2205 } else {
2206 if (j != i)
2207 buf[j] = buf[i];
2208 j++;
2209 }
2210 }
2211 }
2212 *size = j;
2213 }
2214
2215 static int tcp_get_msgfd(CharDriverState *chr)
2216 {
2217 TCPCharDriver *s = chr->opaque;
2218 int fd = s->msgfd;
2219 s->msgfd = -1;
2220 return fd;
2221 }
2222
2223 #ifndef _WIN32
2224 static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
2225 {
2226 TCPCharDriver *s = chr->opaque;
2227 struct cmsghdr *cmsg;
2228
2229 for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
2230 int fd;
2231
2232 if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
2233 cmsg->cmsg_level != SOL_SOCKET ||
2234 cmsg->cmsg_type != SCM_RIGHTS)
2235 continue;
2236
2237 fd = *((int *)CMSG_DATA(cmsg));
2238 if (fd < 0)
2239 continue;
2240
2241 if (s->msgfd != -1)
2242 close(s->msgfd);
2243 s->msgfd = fd;
2244 }
2245 }
2246
2247 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2248 {
2249 TCPCharDriver *s = chr->opaque;
2250 struct msghdr msg = { NULL, };
2251 struct iovec iov[1];
2252 union {
2253 struct cmsghdr cmsg;
2254 char control[CMSG_SPACE(sizeof(int))];
2255 } msg_control;
2256 ssize_t ret;
2257
2258 iov[0].iov_base = buf;
2259 iov[0].iov_len = len;
2260
2261 msg.msg_iov = iov;
2262 msg.msg_iovlen = 1;
2263 msg.msg_control = &msg_control;
2264 msg.msg_controllen = sizeof(msg_control);
2265
2266 ret = recvmsg(s->fd, &msg, 0);
2267 if (ret > 0 && s->is_unix)
2268 unix_process_msgfd(chr, &msg);
2269
2270 return ret;
2271 }
2272 #else
2273 static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
2274 {
2275 TCPCharDriver *s = chr->opaque;
2276 return qemu_recv(s->fd, buf, len, 0);
2277 }
2278 #endif
2279
2280 static void tcp_chr_read(void *opaque)
2281 {
2282 CharDriverState *chr = opaque;
2283 TCPCharDriver *s = chr->opaque;
2284 uint8_t buf[READ_BUF_LEN];
2285 int len, size;
2286
2287 if (!s->connected || s->max_size <= 0)
2288 return;
2289 len = sizeof(buf);
2290 if (len > s->max_size)
2291 len = s->max_size;
2292 size = tcp_chr_recv(chr, (void *)buf, len);
2293 if (size == 0) {
2294 /* connection closed */
2295 s->connected = 0;
2296 if (s->listen_fd >= 0) {
2297 qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2298 }
2299 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2300 closesocket(s->fd);
2301 s->fd = -1;
2302 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2303 } else if (size > 0) {
2304 if (s->do_telnetopt)
2305 tcp_chr_process_IAC_bytes(chr, s, buf, &size);
2306 if (size > 0)
2307 qemu_chr_be_write(chr, buf, size);
2308 }
2309 }
2310
2311 #ifndef _WIN32
2312 CharDriverState *qemu_chr_open_eventfd(int eventfd)
2313 {
2314 return qemu_chr_open_fd(eventfd, eventfd);
2315 }
2316 #endif
2317
2318 static void tcp_chr_connect(void *opaque)
2319 {
2320 CharDriverState *chr = opaque;
2321 TCPCharDriver *s = chr->opaque;
2322
2323 s->connected = 1;
2324 qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
2325 tcp_chr_read, NULL, chr);
2326 qemu_chr_generic_open(chr);
2327 }
2328
2329 #define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
2330 static void tcp_chr_telnet_init(int fd)
2331 {
2332 char buf[3];
2333 /* Send the telnet negotion to put telnet in binary, no echo, single char mode */
2334 IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
2335 send(fd, (char *)buf, 3, 0);
2336 IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
2337 send(fd, (char *)buf, 3, 0);
2338 IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
2339 send(fd, (char *)buf, 3, 0);
2340 IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
2341 send(fd, (char *)buf, 3, 0);
2342 }
2343
2344 static void socket_set_nodelay(int fd)
2345 {
2346 int val = 1;
2347 setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
2348 }
2349
2350 static int tcp_chr_add_client(CharDriverState *chr, int fd)
2351 {
2352 TCPCharDriver *s = chr->opaque;
2353 if (s->fd != -1)
2354 return -1;
2355
2356 socket_set_nonblock(fd);
2357 if (s->do_nodelay)
2358 socket_set_nodelay(fd);
2359 s->fd = fd;
2360 qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2361 tcp_chr_connect(chr);
2362
2363 return 0;
2364 }
2365
2366 static void tcp_chr_accept(void *opaque)
2367 {
2368 CharDriverState *chr = opaque;
2369 TCPCharDriver *s = chr->opaque;
2370 struct sockaddr_in saddr;
2371 #ifndef _WIN32
2372 struct sockaddr_un uaddr;
2373 #endif
2374 struct sockaddr *addr;
2375 socklen_t len;
2376 int fd;
2377
2378 for(;;) {
2379 #ifndef _WIN32
2380 if (s->is_unix) {
2381 len = sizeof(uaddr);
2382 addr = (struct sockaddr *)&uaddr;
2383 } else
2384 #endif
2385 {
2386 len = sizeof(saddr);
2387 addr = (struct sockaddr *)&saddr;
2388 }
2389 fd = qemu_accept(s->listen_fd, addr, &len);
2390 if (fd < 0 && errno != EINTR) {
2391 return;
2392 } else if (fd >= 0) {
2393 if (s->do_telnetopt)
2394 tcp_chr_telnet_init(fd);
2395 break;
2396 }
2397 }
2398 if (tcp_chr_add_client(chr, fd) < 0)
2399 close(fd);
2400 }
2401
2402 static void tcp_chr_close(CharDriverState *chr)
2403 {
2404 TCPCharDriver *s = chr->opaque;
2405 if (s->fd >= 0) {
2406 qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
2407 closesocket(s->fd);
2408 }
2409 if (s->listen_fd >= 0) {
2410 qemu_set_fd_handler2(s->listen_fd, NULL, NULL, NULL, NULL);
2411 closesocket(s->listen_fd);
2412 }
2413 g_free(s);
2414 qemu_chr_be_event(chr, CHR_EVENT_CLOSED);
2415 }
2416
2417 static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
2418 {
2419 CharDriverState *chr = NULL;
2420 TCPCharDriver *s = NULL;
2421 int fd = -1;
2422 int is_listen;
2423 int is_waitconnect;
2424 int do_nodelay;
2425 int is_unix;
2426 int is_telnet;
2427
2428 is_listen = qemu_opt_get_bool(opts, "server", 0);
2429 is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
2430 is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
2431 do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
2432 is_unix = qemu_opt_get(opts, "path") != NULL;
2433 if (!is_listen)
2434 is_waitconnect = 0;
2435
2436 chr = g_malloc0(sizeof(CharDriverState));
2437 s = g_malloc0(sizeof(TCPCharDriver));
2438
2439 if (is_unix) {
2440 if (is_listen) {
2441 fd = unix_listen_opts(opts);
2442 } else {
2443 fd = unix_connect_opts(opts);
2444 }
2445 } else {
2446 if (is_listen) {
2447 fd = inet_listen_opts(opts, 0, NULL);
2448 } else {
2449 fd = inet_connect_opts(opts, NULL);
2450 }
2451 }
2452 if (fd < 0) {
2453 goto fail;
2454 }
2455
2456 if (!is_waitconnect)
2457 socket_set_nonblock(fd);
2458
2459 s->connected = 0;
2460 s->fd = -1;
2461 s->listen_fd = -1;
2462 s->msgfd = -1;
2463 s->is_unix = is_unix;
2464 s->do_nodelay = do_nodelay && !is_unix;
2465
2466 chr->opaque = s;
2467 chr->chr_write = tcp_chr_write;
2468 chr->chr_close = tcp_chr_close;
2469 chr->get_msgfd = tcp_get_msgfd;
2470 chr->chr_add_client = tcp_chr_add_client;
2471
2472 if (is_listen) {
2473 s->listen_fd = fd;
2474 qemu_set_fd_handler2(s->listen_fd, NULL, tcp_chr_accept, NULL, chr);
2475 if (is_telnet)
2476 s->do_telnetopt = 1;
2477
2478 } else {
2479 s->connected = 1;
2480 s->fd = fd;
2481 socket_set_nodelay(fd);
2482 tcp_chr_connect(chr);
2483 }
2484
2485 /* for "info chardev" monitor command */
2486 chr->filename = g_malloc(256);
2487 if (is_unix) {
2488 snprintf(chr->filename, 256, "unix:%s%s",
2489 qemu_opt_get(opts, "path"),
2490 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2491 } else if (is_telnet) {
2492 snprintf(chr->filename, 256, "telnet:%s:%s%s",
2493 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2494 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2495 } else {
2496 snprintf(chr->filename, 256, "tcp:%s:%s%s",
2497 qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
2498 qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
2499 }
2500
2501 if (is_listen && is_waitconnect) {
2502 printf("QEMU waiting for connection on: %s\n",
2503 chr->filename);
2504 tcp_chr_accept(chr);
2505 socket_set_nonblock(s->listen_fd);
2506 }
2507 return chr;
2508
2509 fail:
2510 if (fd >= 0)
2511 closesocket(fd);
2512 g_free(s);
2513 g_free(chr);
2514 return NULL;
2515 }
2516
2517 /***********************************************************/
2518 /* Memory chardev */
2519 typedef struct {
2520 size_t outbuf_size;
2521 size_t outbuf_capacity;
2522 uint8_t *outbuf;
2523 } MemoryDriver;
2524
2525 static int mem_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
2526 {
2527 MemoryDriver *d = chr->opaque;
2528
2529 /* TODO: the QString implementation has the same code, we should
2530 * introduce a generic way to do this in cutils.c */
2531 if (d->outbuf_capacity < d->outbuf_size + len) {
2532 /* grow outbuf */
2533 d->outbuf_capacity += len;
2534 d->outbuf_capacity *= 2;
2535 d->outbuf = g_realloc(d->outbuf, d->outbuf_capacity);
2536 }
2537
2538 memcpy(d->outbuf + d->outbuf_size, buf, len);
2539 d->outbuf_size += len;
2540
2541 return len;
2542 }
2543
2544 void qemu_chr_init_mem(CharDriverState *chr)
2545 {
2546 MemoryDriver *d;
2547
2548 d = g_malloc(sizeof(*d));
2549 d->outbuf_size = 0;
2550 d->outbuf_capacity = 4096;
2551 d->outbuf = g_malloc0(d->outbuf_capacity);
2552
2553 memset(chr, 0, sizeof(*chr));
2554 chr->opaque = d;
2555 chr->chr_write = mem_chr_write;
2556 }
2557
2558 QString *qemu_chr_mem_to_qs(CharDriverState *chr)
2559 {
2560 MemoryDriver *d = chr->opaque;
2561 return qstring_from_substr((char *) d->outbuf, 0, d->outbuf_size - 1);
2562 }
2563
2564 /* NOTE: this driver can not be closed with qemu_chr_delete()! */
2565 void qemu_chr_close_mem(CharDriverState *chr)
2566 {
2567 MemoryDriver *d = chr->opaque;
2568
2569 g_free(d->outbuf);
2570 g_free(chr->opaque);
2571 chr->opaque = NULL;
2572 chr->chr_write = NULL;
2573 }
2574
2575 size_t qemu_chr_mem_osize(const CharDriverState *chr)
2576 {
2577 const MemoryDriver *d = chr->opaque;
2578 return d->outbuf_size;
2579 }
2580
2581 QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
2582 {
2583 char host[65], port[33], width[8], height[8];
2584 int pos;
2585 const char *p;
2586 QemuOpts *opts;
2587
2588 opts = qemu_opts_create(qemu_find_opts("chardev"), label, 1);
2589 if (NULL == opts)
2590 return NULL;
2591
2592 if (strstart(filename, "mon:", &p)) {
2593 filename = p;
2594 qemu_opt_set(opts, "mux", "on");
2595 }
2596
2597 if (strcmp(filename, "null") == 0 ||
2598 strcmp(filename, "pty") == 0 ||
2599 strcmp(filename, "msmouse") == 0 ||
2600 strcmp(filename, "braille") == 0 ||
2601 strcmp(filename, "stdio") == 0) {
2602 qemu_opt_set(opts, "backend", filename);
2603 return opts;
2604 }
2605 if (strstart(filename, "vc", &p)) {
2606 qemu_opt_set(opts, "backend", "vc");
2607 if (*p == ':') {
2608 if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
2609 /* pixels */
2610 qemu_opt_set(opts, "width", width);
2611 qemu_opt_set(opts, "height", height);
2612 } else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
2613 /* chars */
2614 qemu_opt_set(opts, "cols", width);
2615 qemu_opt_set(opts, "rows", height);
2616 } else {
2617 goto fail;
2618 }
2619 }
2620 return opts;
2621 }
2622 if (strcmp(filename, "con:") == 0) {
2623 qemu_opt_set(opts, "backend", "console");
2624 return opts;
2625 }
2626 if (strstart(filename, "COM", NULL)) {
2627 qemu_opt_set(opts, "backend", "serial");
2628 qemu_opt_set(opts, "path", filename);
2629 return opts;
2630 }
2631 if (strstart(filename, "file:", &p)) {
2632 qemu_opt_set(opts, "backend", "file");
2633 qemu_opt_set(opts, "path", p);
2634 return opts;
2635 }
2636 if (strstart(filename, "pipe:", &p)) {
2637 qemu_opt_set(opts, "backend", "pipe");
2638 qemu_opt_set(opts, "path", p);
2639 return opts;
2640 }
2641 if (strstart(filename, "tcp:", &p) ||
2642 strstart(filename, "telnet:", &p)) {
2643 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2644 host[0] = 0;
2645 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
2646 goto fail;
2647 }
2648 qemu_opt_set(opts, "backend", "socket");
2649 qemu_opt_set(opts, "host", host);
2650 qemu_opt_set(opts, "port", port);
2651 if (p[pos] == ',') {
2652 if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
2653 goto fail;
2654 }
2655 if (strstart(filename, "telnet:", &p))
2656 qemu_opt_set(opts, "telnet", "on");
2657 return opts;
2658 }
2659 if (strstart(filename, "udp:", &p)) {
2660 qemu_opt_set(opts, "backend", "udp");
2661 if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
2662 host[0] = 0;
2663 if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
2664 goto fail;
2665 }
2666 }
2667 qemu_opt_set(opts, "host", host);
2668 qemu_opt_set(opts, "port", port);
2669 if (p[pos] == '@') {
2670 p += pos + 1;
2671 if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
2672 host[0] = 0;
2673 if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
2674 goto fail;
2675 }
2676 }
2677 qemu_opt_set(opts, "localaddr", host);
2678 qemu_opt_set(opts, "localport", port);
2679 }
2680 return opts;
2681 }
2682 if (strstart(filename, "unix:", &p)) {
2683 qemu_opt_set(opts, "backend", "socket");
2684 if (qemu_opts_do_parse(opts, p, "path") != 0)
2685 goto fail;
2686 return opts;
2687 }
2688 if (strstart(filename, "/dev/parport", NULL) ||
2689 strstart(filename, "/dev/ppi", NULL)) {
2690 qemu_opt_set(opts, "backend", "parport");
2691 qemu_opt_set(opts, "path", filename);
2692 return opts;
2693 }
2694 if (strstart(filename, "/dev/", NULL)) {
2695 qemu_opt_set(opts, "backend", "tty");
2696 qemu_opt_set(opts, "path", filename);
2697 return opts;
2698 }
2699
2700 fail:
2701 qemu_opts_del(opts);
2702 return NULL;
2703 }
2704
2705 static const struct {
2706 const char *name;
2707 CharDriverState *(*open)(QemuOpts *opts);
2708 } backend_table[] = {
2709 { .name = "null", .open = qemu_chr_open_null },
2710 { .name = "socket", .open = qemu_chr_open_socket },
2711 { .name = "udp", .open = qemu_chr_open_udp },
2712 { .name = "msmouse", .open = qemu_chr_open_msmouse },
2713 { .name = "vc", .open = text_console_init },
2714 #ifdef _WIN32
2715 { .name = "file", .open = qemu_chr_open_win_file_out },
2716 { .name = "pipe", .open = qemu_chr_open_win_pipe },
2717 { .name = "console", .open = qemu_chr_open_win_con },
2718 { .name = "serial", .open = qemu_chr_open_win },
2719 { .name = "stdio", .open = qemu_chr_open_win_stdio },
2720 #else
2721 { .name = "file", .open = qemu_chr_open_file_out },
2722 { .name = "pipe", .open = qemu_chr_open_pipe },
2723 { .name = "pty", .open = qemu_chr_open_pty },
2724 { .name = "stdio", .open = qemu_chr_open_stdio },
2725 #endif
2726 #ifdef CONFIG_BRLAPI
2727 { .name = "braille", .open = chr_baum_init },
2728 #endif
2729 #if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
2730 || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
2731 || defined(__FreeBSD_kernel__)
2732 { .name = "tty", .open = qemu_chr_open_tty },
2733 #endif
2734 #if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
2735 || defined(__FreeBSD_kernel__)
2736 { .name = "parport", .open = qemu_chr_open_pp },
2737 #endif
2738 #ifdef CONFIG_SPICE
2739 { .name = "spicevmc", .open = qemu_chr_open_spice },
2740 #endif
2741 };
2742
2743 CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
2744 void (*init)(struct CharDriverState *s))
2745 {
2746 CharDriverState *chr;
2747 int i;
2748
2749 if (qemu_opts_id(opts) == NULL) {
2750 fprintf(stderr, "chardev: no id specified\n");
2751 return NULL;
2752 }
2753
2754 if (qemu_opt_get(opts, "backend") == NULL) {
2755 fprintf(stderr, "chardev: \"%s\" missing backend\n",
2756 qemu_opts_id(opts));
2757 return NULL;
2758 }
2759 for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
2760 if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
2761 break;
2762 }
2763 if (i == ARRAY_SIZE(backend_table)) {
2764 fprintf(stderr, "chardev: backend \"%s\" not found\n",
2765 qemu_opt_get(opts, "backend"));
2766 return NULL;
2767 }
2768
2769 chr = backend_table[i].open(opts);
2770 if (!chr) {
2771 fprintf(stderr, "chardev: opening backend \"%s\" failed\n",
2772 qemu_opt_get(opts, "backend"));
2773 return NULL;
2774 }
2775
2776 if (!chr->filename)
2777 chr->filename = g_strdup(qemu_opt_get(opts, "backend"));
2778 chr->init = init;
2779 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2780
2781 if (qemu_opt_get_bool(opts, "mux", 0)) {
2782 CharDriverState *base = chr;
2783 int len = strlen(qemu_opts_id(opts)) + 6;
2784 base->label = g_malloc(len);
2785 snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
2786 chr = qemu_chr_open_mux(base);
2787 chr->filename = base->filename;
2788 chr->avail_connections = MAX_MUX;
2789 QTAILQ_INSERT_TAIL(&chardevs, chr, next);
2790 } else {
2791 chr->avail_connections = 1;
2792 }
2793 chr->label = g_strdup(qemu_opts_id(opts));
2794 return chr;
2795 }
2796
2797 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
2798 {
2799 const char *p;
2800 CharDriverState *chr;
2801 QemuOpts *opts;
2802
2803 if (strstart(filename, "chardev:", &p)) {
2804 return qemu_chr_find(p);
2805 }
2806
2807 opts = qemu_chr_parse_compat(label, filename);
2808 if (!opts)
2809 return NULL;
2810
2811 chr = qemu_chr_new_from_opts(opts, init);
2812 if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
2813 monitor_init(chr, MONITOR_USE_READLINE);
2814 }
2815 qemu_opts_del(opts);
2816 return chr;
2817 }
2818
2819 void qemu_chr_fe_set_echo(struct CharDriverState *chr, bool echo)
2820 {
2821 if (chr->chr_set_echo) {
2822 chr->chr_set_echo(chr, echo);
2823 }
2824 }
2825
2826 void qemu_chr_fe_open(struct CharDriverState *chr)
2827 {
2828 if (chr->chr_guest_open) {
2829 chr->chr_guest_open(chr);
2830 }
2831 }
2832
2833 void qemu_chr_fe_close(struct CharDriverState *chr)
2834 {
2835 if (chr->chr_guest_close) {
2836 chr->chr_guest_close(chr);
2837 }
2838 }
2839
2840 void qemu_chr_delete(CharDriverState *chr)
2841 {
2842 QTAILQ_REMOVE(&chardevs, chr, next);
2843 if (chr->chr_close)
2844 chr->chr_close(chr);
2845 g_free(chr->filename);
2846 g_free(chr->label);
2847 g_free(chr);
2848 }
2849
2850 ChardevInfoList *qmp_query_chardev(Error **errp)
2851 {
2852 ChardevInfoList *chr_list = NULL;
2853 CharDriverState *chr;
2854
2855 QTAILQ_FOREACH(chr, &chardevs, next) {
2856 ChardevInfoList *info = g_malloc0(sizeof(*info));
2857 info->value = g_malloc0(sizeof(*info->value));
2858 info->value->label = g_strdup(chr->label);
2859 info->value->filename = g_strdup(chr->filename);
2860
2861 info->next = chr_list;
2862 chr_list = info;
2863 }
2864
2865 return chr_list;
2866 }
2867
2868 CharDriverState *qemu_chr_find(const char *name)
2869 {
2870 CharDriverState *chr;
2871
2872 QTAILQ_FOREACH(chr, &chardevs, next) {
2873 if (strcmp(chr->label, name) != 0)
2874 continue;
2875 return chr;
2876 }
2877 return NULL;
2878 }
2879
2880 /* Get a character (serial) device interface. */
2881 CharDriverState *qemu_char_get_next_serial(void)
2882 {
2883 static int next_serial;
2884
2885 /* FIXME: This function needs to go away: use chardev properties! */
2886 return serial_hds[next_serial++];
2887 }
2888
QEMU modified to work with kvm