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qemu-e2k/qemu-char.c

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/*
* QEMU System Emulator
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu-common.h"
#include "net.h"
#include "monitor.h"
#include "console.h"
#include "sysemu.h"
#include "qemu-timer.h"
#include "qemu-char.h"
#include "block.h"
#include "hw/usb.h"
#include "hw/baum.h"
#include "hw/msmouse.h"
#include "qemu-objects.h"
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <time.h>
#include <errno.h>
#include <sys/time.h>
#include <zlib.h>
#ifndef _WIN32
#include <sys/times.h>
#include <sys/wait.h>
#include <termios.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <dirent.h>
#include <netdb.h>
#include <sys/select.h>
#ifdef CONFIG_BSD
#include <sys/stat.h>
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#include <libutil.h>
#include <dev/ppbus/ppi.h>
#include <dev/ppbus/ppbconf.h>
#if defined(__GLIBC__)
#include <pty.h>
#endif
#elif defined(__DragonFly__)
#include <libutil.h>
#include <dev/misc/ppi/ppi.h>
#include <bus/ppbus/ppbconf.h>
#else
#include <util.h>
#endif
#else
#ifdef __linux__
#include <pty.h>
#include <linux/ppdev.h>
#include <linux/parport.h>
#endif
#ifdef __sun__
#include <sys/stat.h>
#include <sys/ethernet.h>
#include <sys/sockio.h>
#include <netinet/arp.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h> // must come after ip.h
#include <netinet/udp.h>
#include <netinet/tcp.h>
#include <net/if.h>
#include <syslog.h>
#include <stropts.h>
#endif
#endif
#endif
#include "qemu_socket.h"
#define READ_BUF_LEN 4096
/***********************************************************/
/* character device */
static QTAILQ_HEAD(CharDriverStateHead, CharDriverState) chardevs =
QTAILQ_HEAD_INITIALIZER(chardevs);
static void qemu_chr_event(CharDriverState *s, int event)
{
/* Keep track if the char device is open */
switch (event) {
case CHR_EVENT_OPENED:
s->opened = 1;
break;
case CHR_EVENT_CLOSED:
s->opened = 0;
break;
}
if (!s->chr_event)
return;
s->chr_event(s->handler_opaque, event);
}
static void qemu_chr_generic_open_bh(void *opaque)
{
CharDriverState *s = opaque;
qemu_chr_event(s, CHR_EVENT_OPENED);
qemu_bh_delete(s->bh);
s->bh = NULL;
}
void qemu_chr_generic_open(CharDriverState *s)
{
if (s->bh == NULL) {
s->bh = qemu_bh_new(qemu_chr_generic_open_bh, s);
qemu_bh_schedule(s->bh);
}
}
int qemu_chr_write(CharDriverState *s, const uint8_t *buf, int len)
{
return s->chr_write(s, buf, len);
}
int qemu_chr_ioctl(CharDriverState *s, int cmd, void *arg)
{
if (!s->chr_ioctl)
return -ENOTSUP;
return s->chr_ioctl(s, cmd, arg);
}
int qemu_chr_can_read(CharDriverState *s)
{
if (!s->chr_can_read)
return 0;
return s->chr_can_read(s->handler_opaque);
}
void qemu_chr_read(CharDriverState *s, uint8_t *buf, int len)
{
s->chr_read(s->handler_opaque, buf, len);
}
int qemu_chr_get_msgfd(CharDriverState *s)
{
return s->get_msgfd ? s->get_msgfd(s) : -1;
}
void qemu_chr_accept_input(CharDriverState *s)
{
if (s->chr_accept_input)
s->chr_accept_input(s);
}
void qemu_chr_printf(CharDriverState *s, const char *fmt, ...)
{
char buf[READ_BUF_LEN];
va_list ap;
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
qemu_chr_write(s, (uint8_t *)buf, strlen(buf));
va_end(ap);
}
void qemu_chr_send_event(CharDriverState *s, int event)
{
if (s->chr_send_event)
s->chr_send_event(s, event);
}
void qemu_chr_add_handlers(CharDriverState *s,
IOCanReadHandler *fd_can_read,
IOReadHandler *fd_read,
IOEventHandler *fd_event,
void *opaque)
{
s->chr_can_read = fd_can_read;
s->chr_read = fd_read;
s->chr_event = fd_event;
s->handler_opaque = opaque;
if (s->chr_update_read_handler)
s->chr_update_read_handler(s);
/* We're connecting to an already opened device, so let's make sure we
also get the open event */
if (s->opened) {
qemu_chr_generic_open(s);
}
}
static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
return len;
}
static CharDriverState *qemu_chr_open_null(QemuOpts *opts)
{
CharDriverState *chr;
chr = qemu_mallocz(sizeof(CharDriverState));
chr->chr_write = null_chr_write;
return chr;
}
/* MUX driver for serial I/O splitting */
#define MAX_MUX 4
#define MUX_BUFFER_SIZE 32 /* Must be a power of 2. */
#define MUX_BUFFER_MASK (MUX_BUFFER_SIZE - 1)
typedef struct {
IOCanReadHandler *chr_can_read[MAX_MUX];
IOReadHandler *chr_read[MAX_MUX];
IOEventHandler *chr_event[MAX_MUX];
void *ext_opaque[MAX_MUX];
CharDriverState *drv;
int focus;
int mux_cnt;
int term_got_escape;
int max_size;
/* Intermediate input buffer allows to catch escape sequences even if the
currently active device is not accepting any input - but only until it
is full as well. */
unsigned char buffer[MAX_MUX][MUX_BUFFER_SIZE];
int prod[MAX_MUX];
int cons[MAX_MUX];
int timestamps;
int linestart;
int64_t timestamps_start;
} MuxDriver;
static int mux_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
MuxDriver *d = chr->opaque;
int ret;
if (!d->timestamps) {
ret = d->drv->chr_write(d->drv, buf, len);
} else {
int i;
ret = 0;
for (i = 0; i < len; i++) {
if (d->linestart) {
char buf1[64];
int64_t ti;
int secs;
ti = qemu_get_clock(rt_clock);
if (d->timestamps_start == -1)
d->timestamps_start = ti;
ti -= d->timestamps_start;
secs = ti / 1000;
snprintf(buf1, sizeof(buf1),
"[%02d:%02d:%02d.%03d] ",
secs / 3600,
(secs / 60) % 60,
secs % 60,
(int)(ti % 1000));
d->drv->chr_write(d->drv, (uint8_t *)buf1, strlen(buf1));
d->linestart = 0;
}
ret += d->drv->chr_write(d->drv, buf+i, 1);
if (buf[i] == '\n') {
d->linestart = 1;
}
}
}
return ret;
}
static const char * const mux_help[] = {
"% h print this help\n\r",
"% x exit emulator\n\r",
"% s save disk data back to file (if -snapshot)\n\r",
"% t toggle console timestamps\n\r"
"% b send break (magic sysrq)\n\r",
"% c switch between console and monitor\n\r",
"% % sends %\n\r",
NULL
};
int term_escape_char = 0x01; /* ctrl-a is used for escape */
static void mux_print_help(CharDriverState *chr)
{
int i, j;
char ebuf[15] = "Escape-Char";
char cbuf[50] = "\n\r";
if (term_escape_char > 0 && term_escape_char < 26) {
snprintf(cbuf, sizeof(cbuf), "\n\r");
snprintf(ebuf, sizeof(ebuf), "C-%c", term_escape_char - 1 + 'a');
} else {
snprintf(cbuf, sizeof(cbuf),
"\n\rEscape-Char set to Ascii: 0x%02x\n\r\n\r",
term_escape_char);
}
chr->chr_write(chr, (uint8_t *)cbuf, strlen(cbuf));
for (i = 0; mux_help[i] != NULL; i++) {
for (j=0; mux_help[i][j] != '\0'; j++) {
if (mux_help[i][j] == '%')
chr->chr_write(chr, (uint8_t *)ebuf, strlen(ebuf));
else
chr->chr_write(chr, (uint8_t *)&mux_help[i][j], 1);
}
}
}
static void mux_chr_send_event(MuxDriver *d, int mux_nr, int event)
{
if (d->chr_event[mux_nr])
d->chr_event[mux_nr](d->ext_opaque[mux_nr], event);
}
static int mux_proc_byte(CharDriverState *chr, MuxDriver *d, int ch)
{
if (d->term_got_escape) {
d->term_got_escape = 0;
if (ch == term_escape_char)
goto send_char;
switch(ch) {
case '?':
case 'h':
mux_print_help(chr);
break;
case 'x':
{
const char *term = "QEMU: Terminated\n\r";
chr->chr_write(chr,(uint8_t *)term,strlen(term));
exit(0);
break;
}
case 's':
{
DriveInfo *dinfo;
QTAILQ_FOREACH(dinfo, &drives, next) {
bdrv_commit(dinfo->bdrv);
}
}
break;
case 'b':
qemu_chr_event(chr, CHR_EVENT_BREAK);
break;
case 'c':
/* Switch to the next registered device */
mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
d->focus++;
if (d->focus >= d->mux_cnt)
d->focus = 0;
mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
break;
case 't':
d->timestamps = !d->timestamps;
d->timestamps_start = -1;
d->linestart = 0;
break;
}
} else if (ch == term_escape_char) {
d->term_got_escape = 1;
} else {
send_char:
return 1;
}
return 0;
}
static void mux_chr_accept_input(CharDriverState *chr)
{
MuxDriver *d = chr->opaque;
int m = d->focus;
while (d->prod[m] != d->cons[m] &&
d->chr_can_read[m] &&
d->chr_can_read[m](d->ext_opaque[m])) {
d->chr_read[m](d->ext_opaque[m],
&d->buffer[m][d->cons[m]++ & MUX_BUFFER_MASK], 1);
}
}
static int mux_chr_can_read(void *opaque)
{
CharDriverState *chr = opaque;
MuxDriver *d = chr->opaque;
int m = d->focus;
if ((d->prod[m] - d->cons[m]) < MUX_BUFFER_SIZE)
return 1;
if (d->chr_can_read[m])
return d->chr_can_read[m](d->ext_opaque[m]);
return 0;
}
static void mux_chr_read(void *opaque, const uint8_t *buf, int size)
{
CharDriverState *chr = opaque;
MuxDriver *d = chr->opaque;
int m = d->focus;
int i;
mux_chr_accept_input (opaque);
for(i = 0; i < size; i++)
if (mux_proc_byte(chr, d, buf[i])) {
if (d->prod[m] == d->cons[m] &&
d->chr_can_read[m] &&
d->chr_can_read[m](d->ext_opaque[m]))
d->chr_read[m](d->ext_opaque[m], &buf[i], 1);
else
d->buffer[m][d->prod[m]++ & MUX_BUFFER_MASK] = buf[i];
}
}
static void mux_chr_event(void *opaque, int event)
{
CharDriverState *chr = opaque;
MuxDriver *d = chr->opaque;
int i;
/* Send the event to all registered listeners */
for (i = 0; i < d->mux_cnt; i++)
mux_chr_send_event(d, i, event);
}
static void mux_chr_update_read_handler(CharDriverState *chr)
{
MuxDriver *d = chr->opaque;
if (d->mux_cnt >= MAX_MUX) {
fprintf(stderr, "Cannot add I/O handlers, MUX array is full\n");
return;
}
d->ext_opaque[d->mux_cnt] = chr->handler_opaque;
d->chr_can_read[d->mux_cnt] = chr->chr_can_read;
d->chr_read[d->mux_cnt] = chr->chr_read;
d->chr_event[d->mux_cnt] = chr->chr_event;
/* Fix up the real driver with mux routines */
if (d->mux_cnt == 0) {
qemu_chr_add_handlers(d->drv, mux_chr_can_read, mux_chr_read,
mux_chr_event, chr);
}
if (d->focus != -1) {
mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_OUT);
}
d->focus = d->mux_cnt;
d->mux_cnt++;
mux_chr_send_event(d, d->focus, CHR_EVENT_MUX_IN);
}
static CharDriverState *qemu_chr_open_mux(CharDriverState *drv)
{
CharDriverState *chr;
MuxDriver *d;
chr = qemu_mallocz(sizeof(CharDriverState));
d = qemu_mallocz(sizeof(MuxDriver));
chr->opaque = d;
d->drv = drv;
d->focus = -1;
chr->chr_write = mux_chr_write;
chr->chr_update_read_handler = mux_chr_update_read_handler;
chr->chr_accept_input = mux_chr_accept_input;
/* Muxes are always open on creation */
qemu_chr_generic_open(chr);
return chr;
}
#ifdef _WIN32
int send_all(int fd, const void *buf, int len1)
{
int ret, len;
len = len1;
while (len > 0) {
ret = send(fd, buf, len, 0);
if (ret < 0) {
errno = WSAGetLastError();
if (errno != WSAEWOULDBLOCK) {
return -1;
}
} else if (ret == 0) {
break;
} else {
buf += ret;
len -= ret;
}
}
return len1 - len;
}
#else
static int unix_write(int fd, const uint8_t *buf, int len1)
{
int ret, len;
len = len1;
while (len > 0) {
ret = write(fd, buf, len);
if (ret < 0) {
if (errno != EINTR && errno != EAGAIN)
return -1;
} else if (ret == 0) {
break;
} else {
buf += ret;
len -= ret;
}
}
return len1 - len;
}
int send_all(int fd, const void *buf, int len1)
{
return unix_write(fd, buf, len1);
}
#endif /* !_WIN32 */
#ifndef _WIN32
typedef struct {
int fd_in, fd_out;
int max_size;
} FDCharDriver;
#define STDIO_MAX_CLIENTS 1
static int stdio_nb_clients = 0;
static int fd_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
FDCharDriver *s = chr->opaque;
return send_all(s->fd_out, buf, len);
}
static int fd_chr_read_poll(void *opaque)
{
CharDriverState *chr = opaque;
FDCharDriver *s = chr->opaque;
s->max_size = qemu_chr_can_read(chr);
return s->max_size;
}
static void fd_chr_read(void *opaque)
{
CharDriverState *chr = opaque;
FDCharDriver *s = chr->opaque;
int size, len;
uint8_t buf[READ_BUF_LEN];
len = sizeof(buf);
if (len > s->max_size)
len = s->max_size;
if (len == 0)
return;
size = read(s->fd_in, buf, len);
if (size == 0) {
/* FD has been closed. Remove it from the active list. */
qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
qemu_chr_event(chr, CHR_EVENT_CLOSED);
return;
}
if (size > 0) {
qemu_chr_read(chr, buf, size);
}
}
static void fd_chr_update_read_handler(CharDriverState *chr)
{
FDCharDriver *s = chr->opaque;
if (s->fd_in >= 0) {
if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
} else {
qemu_set_fd_handler2(s->fd_in, fd_chr_read_poll,
fd_chr_read, NULL, chr);
}
}
}
static void fd_chr_close(struct CharDriverState *chr)
{
FDCharDriver *s = chr->opaque;
if (s->fd_in >= 0) {
if (display_type == DT_NOGRAPHIC && s->fd_in == 0) {
} else {
qemu_set_fd_handler2(s->fd_in, NULL, NULL, NULL, NULL);
}
}
qemu_free(s);
qemu_chr_event(chr, CHR_EVENT_CLOSED);
}
/* open a character device to a unix fd */
static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out)
{
CharDriverState *chr;
FDCharDriver *s;
chr = qemu_mallocz(sizeof(CharDriverState));
s = qemu_mallocz(sizeof(FDCharDriver));
s->fd_in = fd_in;
s->fd_out = fd_out;
chr->opaque = s;
chr->chr_write = fd_chr_write;
chr->chr_update_read_handler = fd_chr_update_read_handler;
chr->chr_close = fd_chr_close;
qemu_chr_generic_open(chr);
return chr;
}
static CharDriverState *qemu_chr_open_file_out(QemuOpts *opts)
{
int fd_out;
TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"),
O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666));
if (fd_out < 0)
return NULL;
return qemu_chr_open_fd(-1, fd_out);
}
static CharDriverState *qemu_chr_open_pipe(QemuOpts *opts)
{
int fd_in, fd_out;
char filename_in[256], filename_out[256];
const char *filename = qemu_opt_get(opts, "path");
if (filename == NULL) {
fprintf(stderr, "chardev: pipe: no filename given\n");
return NULL;
}
snprintf(filename_in, 256, "%s.in", filename);
snprintf(filename_out, 256, "%s.out", filename);
TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
if (fd_in < 0 || fd_out < 0) {
if (fd_in >= 0)
close(fd_in);
if (fd_out >= 0)
close(fd_out);
TFR(fd_in = fd_out = open(filename, O_RDWR | O_BINARY));
if (fd_in < 0)
return NULL;
}
return qemu_chr_open_fd(fd_in, fd_out);
}
/* for STDIO, we handle the case where several clients use it
(nographic mode) */
#define TERM_FIFO_MAX_SIZE 1
static uint8_t term_fifo[TERM_FIFO_MAX_SIZE];
static int term_fifo_size;
static int stdio_read_poll(void *opaque)
{
CharDriverState *chr = opaque;
/* try to flush the queue if needed */
if (term_fifo_size != 0 && qemu_chr_can_read(chr) > 0) {
qemu_chr_read(chr, term_fifo, 1);
term_fifo_size = 0;
}
/* see if we can absorb more chars */
if (term_fifo_size == 0)
return 1;
else
return 0;
}
static void stdio_read(void *opaque)
{
int size;
uint8_t buf[1];
CharDriverState *chr = opaque;
size = read(0, buf, 1);
if (size == 0) {
/* stdin has been closed. Remove it from the active list. */
qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
qemu_chr_event(chr, CHR_EVENT_CLOSED);
return;
}
if (size > 0) {
if (qemu_chr_can_read(chr) > 0) {
qemu_chr_read(chr, buf, 1);
} else if (term_fifo_size == 0) {
term_fifo[term_fifo_size++] = buf[0];
}
}
}
/* init terminal so that we can grab keys */
static struct termios oldtty;
static int old_fd0_flags;
static int term_atexit_done;
static void term_exit(void)
{
tcsetattr (0, TCSANOW, &oldtty);
fcntl(0, F_SETFL, old_fd0_flags);
}
static void term_init(QemuOpts *opts)
{
struct termios tty;
tcgetattr (0, &tty);
oldtty = tty;
old_fd0_flags = fcntl(0, F_GETFL);
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
|INLCR|IGNCR|ICRNL|IXON);
tty.c_oflag |= OPOST;
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
/* if graphical mode, we allow Ctrl-C handling */
if (!qemu_opt_get_bool(opts, "signal", display_type != DT_NOGRAPHIC))
tty.c_lflag &= ~ISIG;
tty.c_cflag &= ~(CSIZE|PARENB);
tty.c_cflag |= CS8;
tty.c_cc[VMIN] = 1;
tty.c_cc[VTIME] = 0;
tcsetattr (0, TCSANOW, &tty);
if (!term_atexit_done++)
atexit(term_exit);
fcntl(0, F_SETFL, O_NONBLOCK);
}
static void qemu_chr_close_stdio(struct CharDriverState *chr)
{
term_exit();
stdio_nb_clients--;
qemu_set_fd_handler2(0, NULL, NULL, NULL, NULL);
fd_chr_close(chr);
}
static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts)
{
CharDriverState *chr;
if (stdio_nb_clients >= STDIO_MAX_CLIENTS)
return NULL;
chr = qemu_chr_open_fd(0, 1);
chr->chr_close = qemu_chr_close_stdio;
qemu_set_fd_handler2(0, stdio_read_poll, stdio_read, NULL, chr);
stdio_nb_clients++;
term_init(opts);
return chr;
}
#ifdef __sun__
/* Once Solaris has openpty(), this is going to be removed. */
static int openpty(int *amaster, int *aslave, char *name,
struct termios *termp, struct winsize *winp)
{
const char *slave;
int mfd = -1, sfd = -1;
*amaster = *aslave = -1;
mfd = open("/dev/ptmx", O_RDWR | O_NOCTTY);
if (mfd < 0)
goto err;
if (grantpt(mfd) == -1 || unlockpt(mfd) == -1)
goto err;
if ((slave = ptsname(mfd)) == NULL)
goto err;
if ((sfd = open(slave, O_RDONLY | O_NOCTTY)) == -1)
goto err;
if (ioctl(sfd, I_PUSH, "ptem") == -1 ||
(termp != NULL && tcgetattr(sfd, termp) < 0))
goto err;
if (amaster)
*amaster = mfd;
if (aslave)
*aslave = sfd;
if (winp)
ioctl(sfd, TIOCSWINSZ, winp);
return 0;
err:
if (sfd != -1)
close(sfd);
close(mfd);
return -1;
}
static void cfmakeraw (struct termios *termios_p)
{
termios_p->c_iflag &=
~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
termios_p->c_oflag &= ~OPOST;
termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
termios_p->c_cflag &= ~(CSIZE|PARENB);
termios_p->c_cflag |= CS8;
termios_p->c_cc[VMIN] = 0;
termios_p->c_cc[VTIME] = 0;
}
#endif
#if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
|| defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
|| defined(__GLIBC__)
typedef struct {
int fd;
int connected;
int polling;
int read_bytes;
QEMUTimer *timer;
} PtyCharDriver;
static void pty_chr_update_read_handler(CharDriverState *chr);
static void pty_chr_state(CharDriverState *chr, int connected);
static int pty_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
PtyCharDriver *s = chr->opaque;
if (!s->connected) {
/* guest sends data, check for (re-)connect */
pty_chr_update_read_handler(chr);
return 0;
}
return send_all(s->fd, buf, len);
}
static int pty_chr_read_poll(void *opaque)
{
CharDriverState *chr = opaque;
PtyCharDriver *s = chr->opaque;
s->read_bytes = qemu_chr_can_read(chr);
return s->read_bytes;
}
static void pty_chr_read(void *opaque)
{
CharDriverState *chr = opaque;
PtyCharDriver *s = chr->opaque;
int size, len;
uint8_t buf[READ_BUF_LEN];
len = sizeof(buf);
if (len > s->read_bytes)
len = s->read_bytes;
if (len == 0)
return;
size = read(s->fd, buf, len);
if ((size == -1 && errno == EIO) ||
(size == 0)) {
pty_chr_state(chr, 0);
return;
}
if (size > 0) {
pty_chr_state(chr, 1);
qemu_chr_read(chr, buf, size);
}
}
static void pty_chr_update_read_handler(CharDriverState *chr)
{
PtyCharDriver *s = chr->opaque;
qemu_set_fd_handler2(s->fd, pty_chr_read_poll,
pty_chr_read, NULL, chr);
s->polling = 1;
/*
* Short timeout here: just need wait long enougth that qemu makes
* it through the poll loop once. When reconnected we want a
* short timeout so we notice it almost instantly. Otherwise
* read() gives us -EIO instantly, making pty_chr_state() reset the
* timeout to the normal (much longer) poll interval before the
* timer triggers.
*/
qemu_mod_timer(s->timer, qemu_get_clock(rt_clock) + 10);
}
static void pty_chr_state(CharDriverState *chr, int connected)
{
PtyCharDriver *s = chr->opaque;
if (!connected) {
qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
s->connected = 0;
s->polling = 0;
/* (re-)connect poll interval for idle guests: once per second.
* We check more frequently in case the guests sends data to
* the virtual device linked to our pty. */
qemu_mod_timer(s->timer, qemu_get_clock(rt_clock) + 1000);
} else {
if (!s->connected)
qemu_chr_generic_open(chr);
s->connected = 1;
}
}
static void pty_chr_timer(void *opaque)
{
struct CharDriverState *chr = opaque;
PtyCharDriver *s = chr->opaque;
if (s->connected)
return;
if (s->polling) {
/* If we arrive here without polling being cleared due
* read returning -EIO, then we are (re-)connected */
pty_chr_state(chr, 1);
return;
}
/* Next poll ... */
pty_chr_update_read_handler(chr);
}
static void pty_chr_close(struct CharDriverState *chr)
{
PtyCharDriver *s = chr->opaque;
qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
close(s->fd);
qemu_del_timer(s->timer);
qemu_free_timer(s->timer);
qemu_free(s);
qemu_chr_event(chr, CHR_EVENT_CLOSED);
}
static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
{
CharDriverState *chr;
PtyCharDriver *s;
struct termios tty;
int slave_fd, len;
#if defined(__OpenBSD__) || defined(__DragonFly__)
char pty_name[PATH_MAX];
#define q_ptsname(x) pty_name
#else
char *pty_name = NULL;
#define q_ptsname(x) ptsname(x)
#endif
chr = qemu_mallocz(sizeof(CharDriverState));
s = qemu_mallocz(sizeof(PtyCharDriver));
if (openpty(&s->fd, &slave_fd, pty_name, NULL, NULL) < 0) {
return NULL;
}
/* Set raw attributes on the pty. */
tcgetattr(slave_fd, &tty);
cfmakeraw(&tty);
tcsetattr(slave_fd, TCSAFLUSH, &tty);
close(slave_fd);
len = strlen(q_ptsname(s->fd)) + 5;
chr->filename = qemu_malloc(len);
snprintf(chr->filename, len, "pty:%s", q_ptsname(s->fd));
qemu_opt_set(opts, "path", q_ptsname(s->fd));
fprintf(stderr, "char device redirected to %s\n", q_ptsname(s->fd));
chr->opaque = s;
chr->chr_write = pty_chr_write;
chr->chr_update_read_handler = pty_chr_update_read_handler;
chr->chr_close = pty_chr_close;
s->timer = qemu_new_timer(rt_clock, pty_chr_timer, chr);
return chr;
}
static void tty_serial_init(int fd, int speed,
int parity, int data_bits, int stop_bits)
{
struct termios tty;
speed_t spd;
#if 0
printf("tty_serial_init: speed=%d parity=%c data=%d stop=%d\n",
speed, parity, data_bits, stop_bits);
#endif
tcgetattr (fd, &tty);
if (!term_atexit_done) {
oldtty = tty;
}
#define check_speed(val) if (speed <= val) { spd = B##val; break; }
speed = speed * 10 / 11;
do {
check_speed(50);
check_speed(75);
check_speed(110);
check_speed(134);
check_speed(150);
check_speed(200);
check_speed(300);
check_speed(600);
check_speed(1200);
check_speed(1800);
check_speed(2400);
check_speed(4800);
check_speed(9600);
check_speed(19200);
check_speed(38400);
/* Non-Posix values follow. They may be unsupported on some systems. */
check_speed(57600);
check_speed(115200);
#ifdef B230400
check_speed(230400);
#endif
#ifdef B460800
check_speed(460800);
#endif
#ifdef B500000
check_speed(500000);
#endif
#ifdef B576000
check_speed(576000);
#endif
#ifdef B921600
check_speed(921600);
#endif
#ifdef B1000000
check_speed(1000000);
#endif
#ifdef B1152000
check_speed(1152000);
#endif
#ifdef B1500000
check_speed(1500000);
#endif
#ifdef B2000000
check_speed(2000000);
#endif
#ifdef B2500000
check_speed(2500000);
#endif
#ifdef B3000000
check_speed(3000000);
#endif
#ifdef B3500000
check_speed(3500000);
#endif
#ifdef B4000000
check_speed(4000000);
#endif
spd = B115200;
} while (0);
cfsetispeed(&tty, spd);
cfsetospeed(&tty, spd);
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
|INLCR|IGNCR|ICRNL|IXON);
tty.c_oflag |= OPOST;
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN|ISIG);
tty.c_cflag &= ~(CSIZE|PARENB|PARODD|CRTSCTS|CSTOPB);
switch(data_bits) {
default:
case 8:
tty.c_cflag |= CS8;
break;
case 7:
tty.c_cflag |= CS7;
break;
case 6:
tty.c_cflag |= CS6;
break;
case 5:
tty.c_cflag |= CS5;
break;
}
switch(parity) {
default:
case 'N':
break;
case 'E':
tty.c_cflag |= PARENB;
break;
case 'O':
tty.c_cflag |= PARENB | PARODD;
break;
}
if (stop_bits == 2)
tty.c_cflag |= CSTOPB;
tcsetattr (fd, TCSANOW, &tty);
}
static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg)
{
FDCharDriver *s = chr->opaque;
switch(cmd) {
case CHR_IOCTL_SERIAL_SET_PARAMS:
{
QEMUSerialSetParams *ssp = arg;
tty_serial_init(s->fd_in, ssp->speed, ssp->parity,
ssp->data_bits, ssp->stop_bits);
}
break;
case CHR_IOCTL_SERIAL_SET_BREAK:
{
int enable = *(int *)arg;
if (enable)
tcsendbreak(s->fd_in, 1);
}
break;
case CHR_IOCTL_SERIAL_GET_TIOCM:
{
int sarg = 0;
int *targ = (int *)arg;
ioctl(s->fd_in, TIOCMGET, &sarg);
*targ = 0;
if (sarg & TIOCM_CTS)
*targ |= CHR_TIOCM_CTS;
if (sarg & TIOCM_CAR)
*targ |= CHR_TIOCM_CAR;
if (sarg & TIOCM_DSR)
*targ |= CHR_TIOCM_DSR;
if (sarg & TIOCM_RI)
*targ |= CHR_TIOCM_RI;
if (sarg & TIOCM_DTR)
*targ |= CHR_TIOCM_DTR;
if (sarg & TIOCM_RTS)
*targ |= CHR_TIOCM_RTS;
}
break;
case CHR_IOCTL_SERIAL_SET_TIOCM:
{
int sarg = *(int *)arg;
int targ = 0;
ioctl(s->fd_in, TIOCMGET, &targ);
targ &= ~(CHR_TIOCM_CTS | CHR_TIOCM_CAR | CHR_TIOCM_DSR
| CHR_TIOCM_RI | CHR_TIOCM_DTR | CHR_TIOCM_RTS);
if (sarg & CHR_TIOCM_CTS)
targ |= TIOCM_CTS;
if (sarg & CHR_TIOCM_CAR)
targ |= TIOCM_CAR;
if (sarg & CHR_TIOCM_DSR)
targ |= TIOCM_DSR;
if (sarg & CHR_TIOCM_RI)
targ |= TIOCM_RI;
if (sarg & CHR_TIOCM_DTR)
targ |= TIOCM_DTR;
if (sarg & CHR_TIOCM_RTS)
targ |= TIOCM_RTS;
ioctl(s->fd_in, TIOCMSET, &targ);
}
break;
default:
return -ENOTSUP;
}
return 0;
}
static void tty_exit(void)
{
tcsetattr(0, TCSANOW, &oldtty);
}
static void qemu_chr_close_tty(CharDriverState *chr)
{
FDCharDriver *s = chr->opaque;
int fd = -1;
if (s) {
fd = s->fd_in;
}
fd_chr_close(chr);
if (fd >= 0) {
close(fd);
}
}
static CharDriverState *qemu_chr_open_tty(QemuOpts *opts)
{
const char *filename = qemu_opt_get(opts, "path");
CharDriverState *chr;
int fd;
TFR(fd = open(filename, O_RDWR | O_NONBLOCK));
if (fd < 0) {
return NULL;
}
tty_serial_init(fd, 115200, 'N', 8, 1);
chr = qemu_chr_open_fd(fd, fd);
if (!chr) {
close(fd);
return NULL;
}
chr->chr_ioctl = tty_serial_ioctl;
chr->chr_close = qemu_chr_close_tty;
if (!term_atexit_done++)
atexit(tty_exit);
return chr;
}
#else /* ! __linux__ && ! __sun__ */
static CharDriverState *qemu_chr_open_pty(QemuOpts *opts)
{
return NULL;
}
#endif /* __linux__ || __sun__ */
#if defined(__linux__)
typedef struct {
int fd;
int mode;
} ParallelCharDriver;
static int pp_hw_mode(ParallelCharDriver *s, uint16_t mode)
{
if (s->mode != mode) {
int m = mode;
if (ioctl(s->fd, PPSETMODE, &m) < 0)
return 0;
s->mode = mode;
}
return 1;
}
static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
{
ParallelCharDriver *drv = chr->opaque;
int fd = drv->fd;
uint8_t b;
switch(cmd) {
case CHR_IOCTL_PP_READ_DATA:
if (ioctl(fd, PPRDATA, &b) < 0)
return -ENOTSUP;
*(uint8_t *)arg = b;
break;
case CHR_IOCTL_PP_WRITE_DATA:
b = *(uint8_t *)arg;
if (ioctl(fd, PPWDATA, &b) < 0)
return -ENOTSUP;
break;
case CHR_IOCTL_PP_READ_CONTROL:
if (ioctl(fd, PPRCONTROL, &b) < 0)
return -ENOTSUP;
/* Linux gives only the lowest bits, and no way to know data
direction! For better compatibility set the fixed upper
bits. */
*(uint8_t *)arg = b | 0xc0;
break;
case CHR_IOCTL_PP_WRITE_CONTROL:
b = *(uint8_t *)arg;
if (ioctl(fd, PPWCONTROL, &b) < 0)
return -ENOTSUP;
break;
case CHR_IOCTL_PP_READ_STATUS:
if (ioctl(fd, PPRSTATUS, &b) < 0)
return -ENOTSUP;
*(uint8_t *)arg = b;
break;
case CHR_IOCTL_PP_DATA_DIR:
if (ioctl(fd, PPDATADIR, (int *)arg) < 0)
return -ENOTSUP;
break;
case CHR_IOCTL_PP_EPP_READ_ADDR:
if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
struct ParallelIOArg *parg = arg;
int n = read(fd, parg->buffer, parg->count);
if (n != parg->count) {
return -EIO;
}
}
break;
case CHR_IOCTL_PP_EPP_READ:
if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
struct ParallelIOArg *parg = arg;
int n = read(fd, parg->buffer, parg->count);
if (n != parg->count) {
return -EIO;
}
}
break;
case CHR_IOCTL_PP_EPP_WRITE_ADDR:
if (pp_hw_mode(drv, IEEE1284_MODE_EPP|IEEE1284_ADDR)) {
struct ParallelIOArg *parg = arg;
int n = write(fd, parg->buffer, parg->count);
if (n != parg->count) {
return -EIO;
}
}
break;
case CHR_IOCTL_PP_EPP_WRITE:
if (pp_hw_mode(drv, IEEE1284_MODE_EPP)) {
struct ParallelIOArg *parg = arg;
int n = write(fd, parg->buffer, parg->count);
if (n != parg->count) {
return -EIO;
}
}
break;
default:
return -ENOTSUP;
}
return 0;
}
static void pp_close(CharDriverState *chr)
{
ParallelCharDriver *drv = chr->opaque;
int fd = drv->fd;
pp_hw_mode(drv, IEEE1284_MODE_COMPAT);
ioctl(fd, PPRELEASE);
close(fd);
qemu_free(drv);
qemu_chr_event(chr, CHR_EVENT_CLOSED);
}
static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
{
const char *filename = qemu_opt_get(opts, "path");
CharDriverState *chr;
ParallelCharDriver *drv;
int fd;
TFR(fd = open(filename, O_RDWR));
if (fd < 0)
return NULL;
if (ioctl(fd, PPCLAIM) < 0) {
close(fd);
return NULL;
}
drv = qemu_mallocz(sizeof(ParallelCharDriver));
drv->fd = fd;
drv->mode = IEEE1284_MODE_COMPAT;
chr = qemu_mallocz(sizeof(CharDriverState));
chr->chr_write = null_chr_write;
chr->chr_ioctl = pp_ioctl;
chr->chr_close = pp_close;
chr->opaque = drv;
qemu_chr_generic_open(chr);
return chr;
}
#endif /* __linux__ */
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
static int pp_ioctl(CharDriverState *chr, int cmd, void *arg)
{
int fd = (int)(long)chr->opaque;
uint8_t b;
switch(cmd) {
case CHR_IOCTL_PP_READ_DATA:
if (ioctl(fd, PPIGDATA, &b) < 0)
return -ENOTSUP;
*(uint8_t *)arg = b;
break;
case CHR_IOCTL_PP_WRITE_DATA:
b = *(uint8_t *)arg;
if (ioctl(fd, PPISDATA, &b) < 0)
return -ENOTSUP;
break;
case CHR_IOCTL_PP_READ_CONTROL:
if (ioctl(fd, PPIGCTRL, &b) < 0)
return -ENOTSUP;
*(uint8_t *)arg = b;
break;
case CHR_IOCTL_PP_WRITE_CONTROL:
b = *(uint8_t *)arg;
if (ioctl(fd, PPISCTRL, &b) < 0)
return -ENOTSUP;
break;
case CHR_IOCTL_PP_READ_STATUS:
if (ioctl(fd, PPIGSTATUS, &b) < 0)
return -ENOTSUP;
*(uint8_t *)arg = b;
break;
default:
return -ENOTSUP;
}
return 0;
}
static CharDriverState *qemu_chr_open_pp(QemuOpts *opts)
{
const char *filename = qemu_opt_get(opts, "path");
CharDriverState *chr;
int fd;
fd = open(filename, O_RDWR);
if (fd < 0)
return NULL;
chr = qemu_mallocz(sizeof(CharDriverState));
chr->opaque = (void *)(long)fd;
chr->chr_write = null_chr_write;
chr->chr_ioctl = pp_ioctl;
return chr;
}
#endif
#else /* _WIN32 */
typedef struct {
int max_size;
HANDLE hcom, hrecv, hsend;
OVERLAPPED orecv, osend;
BOOL fpipe;
DWORD len;
} WinCharState;
#define NSENDBUF 2048
#define NRECVBUF 2048
#define MAXCONNECT 1
#define NTIMEOUT 5000
static int win_chr_poll(void *opaque);
static int win_chr_pipe_poll(void *opaque);
static void win_chr_close(CharDriverState *chr)
{
WinCharState *s = chr->opaque;
if (s->hsend) {
CloseHandle(s->hsend);
s->hsend = NULL;
}
if (s->hrecv) {
CloseHandle(s->hrecv);
s->hrecv = NULL;
}
if (s->hcom) {
CloseHandle(s->hcom);
s->hcom = NULL;
}
if (s->fpipe)
qemu_del_polling_cb(win_chr_pipe_poll, chr);
else
qemu_del_polling_cb(win_chr_poll, chr);
qemu_chr_event(chr, CHR_EVENT_CLOSED);
}
static int win_chr_init(CharDriverState *chr, const char *filename)
{
WinCharState *s = chr->opaque;
COMMCONFIG comcfg;
COMMTIMEOUTS cto = { 0, 0, 0, 0, 0};
COMSTAT comstat;
DWORD size;
DWORD err;
s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
if (!s->hsend) {
fprintf(stderr, "Failed CreateEvent\n");
goto fail;
}
s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
if (!s->hrecv) {
fprintf(stderr, "Failed CreateEvent\n");
goto fail;
}
s->hcom = CreateFile(filename, GENERIC_READ|GENERIC_WRITE, 0, NULL,
OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
if (s->hcom == INVALID_HANDLE_VALUE) {
fprintf(stderr, "Failed CreateFile (%lu)\n", GetLastError());
s->hcom = NULL;
goto fail;
}
if (!SetupComm(s->hcom, NRECVBUF, NSENDBUF)) {
fprintf(stderr, "Failed SetupComm\n");
goto fail;
}
ZeroMemory(&comcfg, sizeof(COMMCONFIG));
size = sizeof(COMMCONFIG);
GetDefaultCommConfig(filename, &comcfg, &size);
comcfg.dcb.DCBlength = sizeof(DCB);
CommConfigDialog(filename, NULL, &comcfg);
if (!SetCommState(s->hcom, &comcfg.dcb)) {
fprintf(stderr, "Failed SetCommState\n");
goto fail;
}
if (!SetCommMask(s->hcom, EV_ERR)) {
fprintf(stderr, "Failed SetCommMask\n");
goto fail;
}
cto.ReadIntervalTimeout = MAXDWORD;
if (!SetCommTimeouts(s->hcom, &cto)) {
fprintf(stderr, "Failed SetCommTimeouts\n");
goto fail;
}
if (!ClearCommError(s->hcom, &err, &comstat)) {
fprintf(stderr, "Failed ClearCommError\n");
goto fail;
}
qemu_add_polling_cb(win_chr_poll, chr);
return 0;
fail:
win_chr_close(chr);
return -1;
}
static int win_chr_write(CharDriverState *chr, const uint8_t *buf, int len1)
{
WinCharState *s = chr->opaque;
DWORD len, ret, size, err;
len = len1;
ZeroMemory(&s->osend, sizeof(s->osend));
s->osend.hEvent = s->hsend;
while (len > 0) {
if (s->hsend)
ret = WriteFile(s->hcom, buf, len, &size, &s->osend);
else
ret = WriteFile(s->hcom, buf, len, &size, NULL);
if (!ret) {
err = GetLastError();
if (err == ERROR_IO_PENDING) {
ret = GetOverlappedResult(s->hcom, &s->osend, &size, TRUE);
if (ret) {
buf += size;
len -= size;
} else {
break;
}
} else {
break;
}
} else {
buf += size;
len -= size;
}
}
return len1 - len;
}
static int win_chr_read_poll(CharDriverState *chr)
{
WinCharState *s = chr->opaque;
s->max_size = qemu_chr_can_read(chr);
return s->max_size;
}
static void win_chr_readfile(CharDriverState *chr)
{
WinCharState *s = chr->opaque;
int ret, err;
uint8_t buf[READ_BUF_LEN];
DWORD size;
ZeroMemory(&s->orecv, sizeof(s->orecv));
s->orecv.hEvent = s->hrecv;
ret = ReadFile(s->hcom, buf, s->len, &size, &s->orecv);
if (!ret) {
err = GetLastError();
if (err == ERROR_IO_PENDING) {
ret = GetOverlappedResult(s->hcom, &s->orecv, &size, TRUE);
}
}
if (size > 0) {
qemu_chr_read(chr, buf, size);
}
}
static void win_chr_read(CharDriverState *chr)
{
WinCharState *s = chr->opaque;
if (s->len > s->max_size)
s->len = s->max_size;
if (s->len == 0)
return;
win_chr_readfile(chr);
}
static int win_chr_poll(void *opaque)
{
CharDriverState *chr = opaque;
WinCharState *s = chr->opaque;
COMSTAT status;
DWORD comerr;
ClearCommError(s->hcom, &comerr, &status);
if (status.cbInQue > 0) {
s->len = status.cbInQue;
win_chr_read_poll(chr);
win_chr_read(chr);
return 1;
}
return 0;
}
static CharDriverState *qemu_chr_open_win(QemuOpts *opts)
{
const char *filename = qemu_opt_get(opts, "path");
CharDriverState *chr;
WinCharState *s;
chr = qemu_mallocz(sizeof(CharDriverState));
s = qemu_mallocz(sizeof(WinCharState));
chr->opaque = s;
chr->chr_write = win_chr_write;
chr->chr_close = win_chr_close;
if (win_chr_init(chr, filename) < 0) {
free(s);
free(chr);
return NULL;
}
qemu_chr_generic_open(chr);
return chr;
}
static int win_chr_pipe_poll(void *opaque)
{
CharDriverState *chr = opaque;
WinCharState *s = chr->opaque;
DWORD size;
PeekNamedPipe(s->hcom, NULL, 0, NULL, &size, NULL);
if (size > 0) {
s->len = size;
win_chr_read_poll(chr);
win_chr_read(chr);
return 1;
}
return 0;
}
static int win_chr_pipe_init(CharDriverState *chr, const char *filename)
{
WinCharState *s = chr->opaque;
OVERLAPPED ov;
int ret;
DWORD size;
char openname[256];
s->fpipe = TRUE;
s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
if (!s->hsend) {
fprintf(stderr, "Failed CreateEvent\n");
goto fail;
}
s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
if (!s->hrecv) {
fprintf(stderr, "Failed CreateEvent\n");
goto fail;
}
snprintf(openname, sizeof(openname), "\\\\.\\pipe\\%s", filename);
s->hcom = CreateNamedPipe(openname, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
PIPE_WAIT,
MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
if (s->hcom == INVALID_HANDLE_VALUE) {
fprintf(stderr, "Failed CreateNamedPipe (%lu)\n", GetLastError());
s->hcom = NULL;
goto fail;
}
ZeroMemory(&ov, sizeof(ov));
ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
ret = ConnectNamedPipe(s->hcom, &ov);
if (ret) {
fprintf(stderr, "Failed ConnectNamedPipe\n");
goto fail;
}
ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
if (!ret) {
fprintf(stderr, "Failed GetOverlappedResult\n");
if (ov.hEvent) {
CloseHandle(ov.hEvent);
ov.hEvent = NULL;
}
goto fail;
}
if (ov.hEvent) {
CloseHandle(ov.hEvent);
ov.hEvent = NULL;
}
qemu_add_polling_cb(win_chr_pipe_poll, chr);
return 0;
fail:
win_chr_close(chr);
return -1;
}
static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts)
{
const char *filename = qemu_opt_get(opts, "path");
CharDriverState *chr;
WinCharState *s;
chr = qemu_mallocz(sizeof(CharDriverState));
s = qemu_mallocz(sizeof(WinCharState));
chr->opaque = s;
chr->chr_write = win_chr_write;
chr->chr_close = win_chr_close;
if (win_chr_pipe_init(chr, filename) < 0) {
free(s);
free(chr);
return NULL;
}
qemu_chr_generic_open(chr);
return chr;
}
static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out)
{
CharDriverState *chr;
WinCharState *s;
chr = qemu_mallocz(sizeof(CharDriverState));
s = qemu_mallocz(sizeof(WinCharState));
s->hcom = fd_out;
chr->opaque = s;
chr->chr_write = win_chr_write;
qemu_chr_generic_open(chr);
return chr;
}
static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts)
{
return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE));
}
static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts)
{
const char *file_out = qemu_opt_get(opts, "path");
HANDLE fd_out;
fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL,
OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if (fd_out == INVALID_HANDLE_VALUE)
return NULL;
return qemu_chr_open_win_file(fd_out);
}
#endif /* !_WIN32 */
/***********************************************************/
/* UDP Net console */
typedef struct {
int fd;
uint8_t buf[READ_BUF_LEN];
int bufcnt;
int bufptr;
int max_size;
} NetCharDriver;
static int udp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
NetCharDriver *s = chr->opaque;
return send(s->fd, (const void *)buf, len, 0);
}
static int udp_chr_read_poll(void *opaque)
{
CharDriverState *chr = opaque;
NetCharDriver *s = chr->opaque;
s->max_size = qemu_chr_can_read(chr);
/* If there were any stray characters in the queue process them
* first
*/
while (s->max_size > 0 && s->bufptr < s->bufcnt) {
qemu_chr_read(chr, &s->buf[s->bufptr], 1);
s->bufptr++;
s->max_size = qemu_chr_can_read(chr);
}
return s->max_size;
}
static void udp_chr_read(void *opaque)
{
CharDriverState *chr = opaque;
NetCharDriver *s = chr->opaque;
if (s->max_size == 0)
return;
s->bufcnt = recv(s->fd, (void *)s->buf, sizeof(s->buf), 0);
s->bufptr = s->bufcnt;
if (s->bufcnt <= 0)
return;
s->bufptr = 0;
while (s->max_size > 0 && s->bufptr < s->bufcnt) {
qemu_chr_read(chr, &s->buf[s->bufptr], 1);
s->bufptr++;
s->max_size = qemu_chr_can_read(chr);
}
}
static void udp_chr_update_read_handler(CharDriverState *chr)
{
NetCharDriver *s = chr->opaque;
if (s->fd >= 0) {
qemu_set_fd_handler2(s->fd, udp_chr_read_poll,
udp_chr_read, NULL, chr);
}
}
static void udp_chr_close(CharDriverState *chr)
{
NetCharDriver *s = chr->opaque;
if (s->fd >= 0) {
qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
closesocket(s->fd);
}
qemu_free(s);
qemu_chr_event(chr, CHR_EVENT_CLOSED);
}
static CharDriverState *qemu_chr_open_udp(QemuOpts *opts)
{
CharDriverState *chr = NULL;
NetCharDriver *s = NULL;
int fd = -1;
chr = qemu_mallocz(sizeof(CharDriverState));
s = qemu_mallocz(sizeof(NetCharDriver));
fd = inet_dgram_opts(opts);
if (fd < 0) {
fprintf(stderr, "inet_dgram_opts failed\n");
goto return_err;
}
s->fd = fd;
s->bufcnt = 0;
s->bufptr = 0;
chr->opaque = s;
chr->chr_write = udp_chr_write;
chr->chr_update_read_handler = udp_chr_update_read_handler;
chr->chr_close = udp_chr_close;
return chr;
return_err:
if (chr)
free(chr);
if (s)
free(s);
if (fd >= 0)
closesocket(fd);
return NULL;
}
/***********************************************************/
/* TCP Net console */
typedef struct {
int fd, listen_fd;
int connected;
int max_size;
int do_telnetopt;
int do_nodelay;
int is_unix;
int msgfd;
} TCPCharDriver;
static void tcp_chr_accept(void *opaque);
static int tcp_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
{
TCPCharDriver *s = chr->opaque;
if (s->connected) {
return send_all(s->fd, buf, len);
} else {
/* XXX: indicate an error ? */
return len;
}
}
static int tcp_chr_read_poll(void *opaque)
{
CharDriverState *chr = opaque;
TCPCharDriver *s = chr->opaque;
if (!s->connected)
return 0;
s->max_size = qemu_chr_can_read(chr);
return s->max_size;
}
#define IAC 255
#define IAC_BREAK 243
static void tcp_chr_process_IAC_bytes(CharDriverState *chr,
TCPCharDriver *s,
uint8_t *buf, int *size)
{
/* Handle any telnet client's basic IAC options to satisfy char by
* char mode with no echo. All IAC options will be removed from
* the buf and the do_telnetopt variable will be used to track the
* state of the width of the IAC information.
*
* IAC commands come in sets of 3 bytes with the exception of the
* "IAC BREAK" command and the double IAC.
*/
int i;
int j = 0;
for (i = 0; i < *size; i++) {
if (s->do_telnetopt > 1) {
if ((unsigned char)buf[i] == IAC && s->do_telnetopt == 2) {
/* Double IAC means send an IAC */
if (j != i)
buf[j] = buf[i];
j++;
s->do_telnetopt = 1;
} else {
if ((unsigned char)buf[i] == IAC_BREAK && s->do_telnetopt == 2) {
/* Handle IAC break commands by sending a serial break */
qemu_chr_event(chr, CHR_EVENT_BREAK);
s->do_telnetopt++;
}
s->do_telnetopt++;
}
if (s->do_telnetopt >= 4) {
s->do_telnetopt = 1;
}
} else {
if ((unsigned char)buf[i] == IAC) {
s->do_telnetopt = 2;
} else {
if (j != i)
buf[j] = buf[i];
j++;
}
}
}
*size = j;
}
static int tcp_get_msgfd(CharDriverState *chr)
{
TCPCharDriver *s = chr->opaque;
int fd = s->msgfd;
s->msgfd = -1;
return fd;
}
#ifndef _WIN32
static void unix_process_msgfd(CharDriverState *chr, struct msghdr *msg)
{
TCPCharDriver *s = chr->opaque;
struct cmsghdr *cmsg;
for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
int fd;
if (cmsg->cmsg_len != CMSG_LEN(sizeof(int)) ||
cmsg->cmsg_level != SOL_SOCKET ||
cmsg->cmsg_type != SCM_RIGHTS)
continue;
fd = *((int *)CMSG_DATA(cmsg));
if (fd < 0)
continue;
if (s->msgfd != -1)
close(s->msgfd);
s->msgfd = fd;
}
}
static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
{
TCPCharDriver *s = chr->opaque;
struct msghdr msg = { NULL, };
struct iovec iov[1];
union {
struct cmsghdr cmsg;
char control[CMSG_SPACE(sizeof(int))];
} msg_control;
ssize_t ret;
iov[0].iov_base = buf;
iov[0].iov_len = len;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_control = &msg_control;
msg.msg_controllen = sizeof(msg_control);
ret = recvmsg(s->fd, &msg, 0);
if (ret > 0 && s->is_unix)
unix_process_msgfd(chr, &msg);
return ret;
}
#else
static ssize_t tcp_chr_recv(CharDriverState *chr, char *buf, size_t len)
{
TCPCharDriver *s = chr->opaque;
return recv(s->fd, buf, len, 0);
}
#endif
static void tcp_chr_read(void *opaque)
{
CharDriverState *chr = opaque;
TCPCharDriver *s = chr->opaque;
uint8_t buf[READ_BUF_LEN];
int len, size;
if (!s->connected || s->max_size <= 0)
return;
len = sizeof(buf);
if (len > s->max_size)
len = s->max_size;
size = tcp_chr_recv(chr, (void *)buf, len);
if (size == 0) {
/* connection closed */
s->connected = 0;
if (s->listen_fd >= 0) {
qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
}
qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
closesocket(s->fd);
s->fd = -1;
qemu_chr_event(chr, CHR_EVENT_CLOSED);
} else if (size > 0) {
if (s->do_telnetopt)
tcp_chr_process_IAC_bytes(chr, s, buf, &size);
if (size > 0)
qemu_chr_read(chr, buf, size);
}
}
static void tcp_chr_connect(void *opaque)
{
CharDriverState *chr = opaque;
TCPCharDriver *s = chr->opaque;
s->connected = 1;
qemu_set_fd_handler2(s->fd, tcp_chr_read_poll,
tcp_chr_read, NULL, chr);
qemu_chr_generic_open(chr);
}
#define IACSET(x,a,b,c) x[0] = a; x[1] = b; x[2] = c;
static void tcp_chr_telnet_init(int fd)
{
char buf[3];
/* Send the telnet negotion to put telnet in binary, no echo, single char mode */
IACSET(buf, 0xff, 0xfb, 0x01); /* IAC WILL ECHO */
send(fd, (char *)buf, 3, 0);
IACSET(buf, 0xff, 0xfb, 0x03); /* IAC WILL Suppress go ahead */
send(fd, (char *)buf, 3, 0);
IACSET(buf, 0xff, 0xfb, 0x00); /* IAC WILL Binary */
send(fd, (char *)buf, 3, 0);
IACSET(buf, 0xff, 0xfd, 0x00); /* IAC DO Binary */
send(fd, (char *)buf, 3, 0);
}
static void socket_set_nodelay(int fd)
{
int val = 1;
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char *)&val, sizeof(val));
}
static void tcp_chr_accept(void *opaque)
{
CharDriverState *chr = opaque;
TCPCharDriver *s = chr->opaque;
struct sockaddr_in saddr;
#ifndef _WIN32
struct sockaddr_un uaddr;
#endif
struct sockaddr *addr;
socklen_t len;
int fd;
for(;;) {
#ifndef _WIN32
if (s->is_unix) {
len = sizeof(uaddr);
addr = (struct sockaddr *)&uaddr;
} else
#endif
{
len = sizeof(saddr);
addr = (struct sockaddr *)&saddr;
}
fd = qemu_accept(s->listen_fd, addr, &len);
if (fd < 0 && errno != EINTR) {
return;
} else if (fd >= 0) {
if (s->do_telnetopt)
tcp_chr_telnet_init(fd);
break;
}
}
socket_set_nonblock(fd);
if (s->do_nodelay)
socket_set_nodelay(fd);
s->fd = fd;
qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
tcp_chr_connect(chr);
}
static void tcp_chr_close(CharDriverState *chr)
{
TCPCharDriver *s = chr->opaque;
if (s->fd >= 0) {
qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
closesocket(s->fd);
}
if (s->listen_fd >= 0) {
qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL);
closesocket(s->listen_fd);
}
qemu_free(s);
qemu_chr_event(chr, CHR_EVENT_CLOSED);
}
static CharDriverState *qemu_chr_open_socket(QemuOpts *opts)
{
CharDriverState *chr = NULL;
TCPCharDriver *s = NULL;
int fd = -1;
int is_listen;
int is_waitconnect;
int do_nodelay;
int is_unix;
int is_telnet;
is_listen = qemu_opt_get_bool(opts, "server", 0);
is_waitconnect = qemu_opt_get_bool(opts, "wait", 1);
is_telnet = qemu_opt_get_bool(opts, "telnet", 0);
do_nodelay = !qemu_opt_get_bool(opts, "delay", 1);
is_unix = qemu_opt_get(opts, "path") != NULL;
if (!is_listen)
is_waitconnect = 0;
chr = qemu_mallocz(sizeof(CharDriverState));
s = qemu_mallocz(sizeof(TCPCharDriver));
if (is_unix) {
if (is_listen) {
fd = unix_listen_opts(opts);
} else {
fd = unix_connect_opts(opts);
}
} else {
if (is_listen) {
fd = inet_listen_opts(opts, 0);
} else {
fd = inet_connect_opts(opts);
}
}
if (fd < 0)
goto fail;
if (!is_waitconnect)
socket_set_nonblock(fd);
s->connected = 0;
s->fd = -1;
s->listen_fd = -1;
s->msgfd = -1;
s->is_unix = is_unix;
s->do_nodelay = do_nodelay && !is_unix;
chr->opaque = s;
chr->chr_write = tcp_chr_write;
chr->chr_close = tcp_chr_close;
chr->get_msgfd = tcp_get_msgfd;
if (is_listen) {
s->listen_fd = fd;
qemu_set_fd_handler(s->listen_fd, tcp_chr_accept, NULL, chr);
if (is_telnet)
s->do_telnetopt = 1;
} else {
s->connected = 1;
s->fd = fd;
socket_set_nodelay(fd);
tcp_chr_connect(chr);
}
/* for "info chardev" monitor command */
chr->filename = qemu_malloc(256);
if (is_unix) {
snprintf(chr->filename, 256, "unix:%s%s",
qemu_opt_get(opts, "path"),
qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
} else if (is_telnet) {
snprintf(chr->filename, 256, "telnet:%s:%s%s",
qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
} else {
snprintf(chr->filename, 256, "tcp:%s:%s%s",
qemu_opt_get(opts, "host"), qemu_opt_get(opts, "port"),
qemu_opt_get_bool(opts, "server", 0) ? ",server" : "");
}
if (is_listen && is_waitconnect) {
printf("QEMU waiting for connection on: %s\n",
chr->filename);
tcp_chr_accept(chr);
socket_set_nonblock(s->listen_fd);
}
return chr;
fail:
if (fd >= 0)
closesocket(fd);
qemu_free(s);
qemu_free(chr);
return NULL;
}
QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
{
char host[65], port[33], width[8], height[8];
int pos;
const char *p;
QemuOpts *opts;
opts = qemu_opts_create(&qemu_chardev_opts, label, 1);
if (NULL == opts)
return NULL;
if (strstart(filename, "mon:", &p)) {
filename = p;
qemu_opt_set(opts, "mux", "on");
}
if (strcmp(filename, "null") == 0 ||
strcmp(filename, "pty") == 0 ||
strcmp(filename, "msmouse") == 0 ||
strcmp(filename, "braille") == 0 ||
strcmp(filename, "stdio") == 0) {
qemu_opt_set(opts, "backend", filename);
return opts;
}
if (strstart(filename, "vc", &p)) {
qemu_opt_set(opts, "backend", "vc");
if (*p == ':') {
if (sscanf(p+1, "%8[0-9]x%8[0-9]", width, height) == 2) {
/* pixels */
qemu_opt_set(opts, "width", width);
qemu_opt_set(opts, "height", height);
} else if (sscanf(p+1, "%8[0-9]Cx%8[0-9]C", width, height) == 2) {
/* chars */
qemu_opt_set(opts, "cols", width);
qemu_opt_set(opts, "rows", height);
} else {
goto fail;
}
}
return opts;
}
if (strcmp(filename, "con:") == 0) {
qemu_opt_set(opts, "backend", "console");
return opts;
}
if (strstart(filename, "COM", NULL)) {
qemu_opt_set(opts, "backend", "serial");
qemu_opt_set(opts, "path", filename);
return opts;
}
if (strstart(filename, "file:", &p)) {
qemu_opt_set(opts, "backend", "file");
qemu_opt_set(opts, "path", p);
return opts;
}
if (strstart(filename, "pipe:", &p)) {
qemu_opt_set(opts, "backend", "pipe");
qemu_opt_set(opts, "path", p);
return opts;
}
if (strstart(filename, "tcp:", &p) ||
strstart(filename, "telnet:", &p)) {
if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
host[0] = 0;
if (sscanf(p, ":%32[^,]%n", port, &pos) < 1)
goto fail;
}
qemu_opt_set(opts, "backend", "socket");
qemu_opt_set(opts, "host", host);
qemu_opt_set(opts, "port", port);
if (p[pos] == ',') {
if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
goto fail;
}
if (strstart(filename, "telnet:", &p))
qemu_opt_set(opts, "telnet", "on");
return opts;
}
if (strstart(filename, "udp:", &p)) {
qemu_opt_set(opts, "backend", "udp");
if (sscanf(p, "%64[^:]:%32[^@,]%n", host, port, &pos) < 2) {
host[0] = 0;
if (sscanf(p, ":%32[^@,]%n", port, &pos) < 1) {
goto fail;
}
}
qemu_opt_set(opts, "host", host);
qemu_opt_set(opts, "port", port);
if (p[pos] == '@') {
p += pos + 1;
if (sscanf(p, "%64[^:]:%32[^,]%n", host, port, &pos) < 2) {
host[0] = 0;
if (sscanf(p, ":%32[^,]%n", port, &pos) < 1) {
goto fail;
}
}
qemu_opt_set(opts, "localaddr", host);
qemu_opt_set(opts, "localport", port);
}
return opts;
}
if (strstart(filename, "unix:", &p)) {
qemu_opt_set(opts, "backend", "socket");
if (qemu_opts_do_parse(opts, p, "path") != 0)
goto fail;
return opts;
}
if (strstart(filename, "/dev/parport", NULL) ||
strstart(filename, "/dev/ppi", NULL)) {
qemu_opt_set(opts, "backend", "parport");
qemu_opt_set(opts, "path", filename);
return opts;
}
if (strstart(filename, "/dev/", NULL)) {
qemu_opt_set(opts, "backend", "tty");
qemu_opt_set(opts, "path", filename);
return opts;
}
fail:
qemu_opts_del(opts);
return NULL;
}
static const struct {
const char *name;
CharDriverState *(*open)(QemuOpts *opts);
} backend_table[] = {
{ .name = "null", .open = qemu_chr_open_null },
{ .name = "socket", .open = qemu_chr_open_socket },
{ .name = "udp", .open = qemu_chr_open_udp },
{ .name = "msmouse", .open = qemu_chr_open_msmouse },
{ .name = "vc", .open = text_console_init },
#ifdef _WIN32
{ .name = "file", .open = qemu_chr_open_win_file_out },
{ .name = "pipe", .open = qemu_chr_open_win_pipe },
{ .name = "console", .open = qemu_chr_open_win_con },
{ .name = "serial", .open = qemu_chr_open_win },
#else
{ .name = "file", .open = qemu_chr_open_file_out },
{ .name = "pipe", .open = qemu_chr_open_pipe },
{ .name = "pty", .open = qemu_chr_open_pty },
{ .name = "stdio", .open = qemu_chr_open_stdio },
#endif
#ifdef CONFIG_BRLAPI
{ .name = "braille", .open = chr_baum_init },
#endif
#if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \
|| defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
|| defined(__FreeBSD_kernel__)
{ .name = "tty", .open = qemu_chr_open_tty },
#endif
#if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) \
|| defined(__FreeBSD_kernel__)
{ .name = "parport", .open = qemu_chr_open_pp },
#endif
};
CharDriverState *qemu_chr_open_opts(QemuOpts *opts,
void (*init)(struct CharDriverState *s))
{
CharDriverState *chr;
int i;
if (qemu_opts_id(opts) == NULL) {
fprintf(stderr, "chardev: no id specified\n");
return NULL;
}
for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
break;
}
if (i == ARRAY_SIZE(backend_table)) {
fprintf(stderr, "chardev: backend \"%s\" not found\n",
qemu_opt_get(opts, "backend"));
return NULL;
}
chr = backend_table[i].open(opts);
if (!chr) {
fprintf(stderr, "chardev: opening backend \"%s\" failed\n",
qemu_opt_get(opts, "backend"));
return NULL;
}
if (!chr->filename)
chr->filename = qemu_strdup(qemu_opt_get(opts, "backend"));
chr->init = init;
QTAILQ_INSERT_TAIL(&chardevs, chr, next);
if (qemu_opt_get_bool(opts, "mux", 0)) {
CharDriverState *base = chr;
int len = strlen(qemu_opts_id(opts)) + 6;
base->label = qemu_malloc(len);
snprintf(base->label, len, "%s-base", qemu_opts_id(opts));
chr = qemu_chr_open_mux(base);
chr->filename = base->filename;
QTAILQ_INSERT_TAIL(&chardevs, chr, next);
}
chr->label = qemu_strdup(qemu_opts_id(opts));
return chr;
}
CharDriverState *qemu_chr_open(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
{
const char *p;
CharDriverState *chr;
QemuOpts *opts;
if (strstart(filename, "chardev:", &p)) {
return qemu_chr_find(p);
}
opts = qemu_chr_parse_compat(label, filename);
if (!opts)
return NULL;
chr = qemu_chr_open_opts(opts, init);
if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
monitor_init(chr, MONITOR_USE_READLINE);
}
return chr;
}
void qemu_chr_close(CharDriverState *chr)
{
QTAILQ_REMOVE(&chardevs, chr, next);
if (chr->chr_close)
chr->chr_close(chr);
qemu_free(chr->filename);
qemu_free(chr->label);
qemu_free(chr);
}
static void qemu_chr_qlist_iter(QObject *obj, void *opaque)
{
QDict *chr_dict;
Monitor *mon = opaque;
chr_dict = qobject_to_qdict(obj);
monitor_printf(mon, "%s: filename=%s\n", qdict_get_str(chr_dict, "label"),
qdict_get_str(chr_dict, "filename"));
}
void qemu_chr_info_print(Monitor *mon, const QObject *ret_data)
{
qlist_iter(qobject_to_qlist(ret_data), qemu_chr_qlist_iter, mon);
}
/**
* qemu_chr_info(): Character devices information
*
* Each device is represented by a QDict. The returned QObject is a QList
* of all devices.
*
* The QDict contains the following:
*
* - "label": device's label
* - "filename": device's file
*
* Example:
*
* [ { "label": "monitor", "filename", "stdio" },
* { "label": "serial0", "filename": "vc" } ]
*/
void qemu_chr_info(Monitor *mon, QObject **ret_data)
{
QList *chr_list;
CharDriverState *chr;
chr_list = qlist_new();
QTAILQ_FOREACH(chr, &chardevs, next) {
QObject *obj = qobject_from_jsonf("{ 'label': %s, 'filename': %s }",
chr->label, chr->filename);
qlist_append_obj(chr_list, obj);
}
*ret_data = QOBJECT(chr_list);
}
CharDriverState *qemu_chr_find(const char *name)
{
CharDriverState *chr;
QTAILQ_FOREACH(chr, &chardevs, next) {
if (strcmp(chr->label, name) != 0)
continue;
return chr;
}
return NULL;
}
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