Merge remote-tracking branch 'remotes/elmarco/tags/chrfe-pull-request' into staging

# gpg: Signature made Fri 02 Jun 2017 20:12:48 BST
# gpg:                using RSA key 0xDAE8E10975969CE5
# gpg: Good signature from "Marc-André Lureau <marcandre.lureau@redhat.com>"
# gpg:                 aka "Marc-André Lureau <marcandre.lureau@gmail.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 87A9 BD93 3F87 C606 D276  F62D DAE8 E109 7596 9CE5

* remotes/elmarco/tags/chrfe-pull-request:
  char: move char devices to chardev/
  char: make chr_fe_deinit() optionaly delete backend
  char: rename functions that are not part of fe
  char: move CharBackend handling in char-fe unit
  char: generalize qemu_chr_write_all()
  be-hci: use backend functions
  chardev: serial & parallel declaration to own headers
  chardev: move headers to include/chardev
  Remove/replace sysemu/char.h inclusion
  char-win: close file handle except with console
  char-win: rename hcom->file
  char-win: rename win_chr_init/poll win_chr_serial_init/poll
  char-win: remove WinChardev.len
  char-win: simplify win_chr_read()
  char: cast ARRAY_SIZE() as signed to silent warning on empty array

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

16 files changed, 828 insertions, 506 deletions

diff --git a/include/chardev/char-fd.h b/include/chardev/char-fd.h
new file mode 100644
index 0000000000..55ae5b47b0
--- /dev/null
+++ b/include/chardev/char-fd.h
@@ -0,0 +1,44 @@
+/*
+ * 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.
+ */
+#ifndef CHAR_FD_H
+#define CHAR_FD_H
+
+#include "io/channel.h"
+#include "chardev/char.h"
+
+typedef struct FDChardev {
+    Chardev parent;
+    Chardev *chr;
+    QIOChannel *ioc_in, *ioc_out;
+    int max_size;
+} FDChardev;
+
+#define TYPE_CHARDEV_FD "chardev-fd"
+
+#define FD_CHARDEV(obj) OBJECT_CHECK(FDChardev, (obj), TYPE_CHARDEV_FD)
+
+void qemu_chr_open_fd(Chardev *chr, int fd_in, int fd_out);
+int qmp_chardev_open_file_source(char *src, int flags, Error **errp);
+
+#endif /* CHAR_FD_H */
diff --git a/include/chardev/char-fe.h b/include/chardev/char-fe.h
new file mode 100644
index 0000000000..2cbb262f66
--- /dev/null
+++ b/include/chardev/char-fe.h
@@ -0,0 +1,251 @@
+#ifndef QEMU_CHAR_FE_H
+#define QEMU_CHAR_FE_H
+
+#include "chardev/char.h"
+
+typedef void IOEventHandler(void *opaque, int event);
+
+/* This is the backend as seen by frontend, the actual backend is
+ * Chardev */
+struct CharBackend {
+    Chardev *chr;
+    IOEventHandler *chr_event;
+    IOCanReadHandler *chr_can_read;
+    IOReadHandler *chr_read;
+    void *opaque;
+    int tag;
+    int fe_open;
+};
+
+/**
+ * @qemu_chr_fe_init:
+ *
+ * Initializes a front end for the given CharBackend and
+ * Chardev. Call qemu_chr_fe_deinit() to remove the association and
+ * release the driver.
+ *
+ * Returns: false on error.
+ */
+bool qemu_chr_fe_init(CharBackend *b, Chardev *s, Error **errp);
+
+/**
+ * @qemu_chr_fe_deinit:
+ * @b: a CharBackend
+ * @del: if true, delete the chardev backend
+*
+ * Dissociate the CharBackend from the Chardev.
+ *
+ * Safe to call without associated Chardev.
+ */
+void qemu_chr_fe_deinit(CharBackend *b, bool del);
+
+/**
+ * @qemu_chr_fe_get_driver:
+ *
+ * Returns the driver associated with a CharBackend or NULL if no
+ * associated Chardev.
+ */
+Chardev *qemu_chr_fe_get_driver(CharBackend *be);
+
+/**
+ * @qemu_chr_fe_set_handlers:
+ * @b: a CharBackend
+ * @fd_can_read: callback to get the amount of data the frontend may
+ *               receive
+ * @fd_read: callback to receive data from char
+ * @fd_event: event callback
+ * @opaque: an opaque pointer for the callbacks
+ * @context: a main loop context or NULL for the default
+ * @set_open: whether to call qemu_chr_fe_set_open() implicitely when
+ * any of the handler is non-NULL
+ *
+ * Set the front end char handlers. The front end takes the focus if
+ * any of the handler is non-NULL.
+ *
+ * Without associated Chardev, nothing is changed.
+ */
+void qemu_chr_fe_set_handlers(CharBackend *b,
+                              IOCanReadHandler *fd_can_read,
+                              IOReadHandler *fd_read,
+                              IOEventHandler *fd_event,
+                              void *opaque,
+                              GMainContext *context,
+                              bool set_open);
+
+/**
+ * @qemu_chr_fe_take_focus:
+ *
+ * Take the focus (if the front end is muxed).
+ *
+ * Without associated Chardev, nothing is changed.
+ */
+void qemu_chr_fe_take_focus(CharBackend *b);
+
+/**
+ * @qemu_chr_fe_accept_input:
+ *
+ * Notify that the frontend is ready to receive data
+ */
+void qemu_chr_fe_accept_input(CharBackend *be);
+
+/**
+ * @qemu_chr_fe_disconnect:
+ *
+ * Close a fd accpeted by character backend.
+ * Without associated Chardev, do nothing.
+ */
+void qemu_chr_fe_disconnect(CharBackend *be);
+
+/**
+ * @qemu_chr_fe_wait_connected:
+ *
+ * Wait for characted backend to be connected, return < 0 on error or
+ * if no assicated Chardev.
+ */
+int qemu_chr_fe_wait_connected(CharBackend *be, Error **errp);
+
+/**
+ * @qemu_chr_fe_set_echo:
+ *
+ * Ask the backend to override its normal echo setting.  This only really
+ * applies to the stdio backend and is used by the QMP server such that you
+ * can see what you type if you try to type QMP commands.
+ * Without associated Chardev, do nothing.
+ *
+ * @echo true to enable echo, false to disable echo
+ */
+void qemu_chr_fe_set_echo(CharBackend *be, bool echo);
+
+/**
+ * @qemu_chr_fe_set_open:
+ *
+ * Set character frontend open status.  This is an indication that the
+ * front end is ready (or not) to begin doing I/O.
+ * Without associated Chardev, do nothing.
+ */
+void qemu_chr_fe_set_open(CharBackend *be, int fe_open);
+
+/**
+ * @qemu_chr_fe_printf:
+ *
+ * Write to a character backend using a printf style interface.  This
+ * function is thread-safe. It does nothing without associated
+ * Chardev.
+ *
+ * @fmt see #printf
+ */
+void qemu_chr_fe_printf(CharBackend *be, const char *fmt, ...)
+    GCC_FMT_ATTR(2, 3);
+
+/**
+ * @qemu_chr_fe_add_watch:
+ *
+ * If the backend is connected, create and add a #GSource that fires
+ * when the given condition (typically G_IO_OUT|G_IO_HUP or G_IO_HUP)
+ * is active; return the #GSource's tag.  If it is disconnected,
+ * or without associated Chardev, return 0.
+ *
+ * @cond the condition to poll for
+ * @func the function to call when the condition happens
+ * @user_data the opaque pointer to pass to @func
+ *
+ * Returns: the source tag
+ */
+guint qemu_chr_fe_add_watch(CharBackend *be, GIOCondition cond,
+                            GIOFunc func, void *user_data);
+
+/**
+ * @qemu_chr_fe_write:
+ *
+ * Write data to a character backend from the front end.  This function
+ * will send data from the front end to the back end.  This function
+ * is thread-safe.
+ *
+ * @buf the data
+ * @len the number of bytes to send
+ *
+ * Returns: the number of bytes consumed (0 if no assicated Chardev)
+ */
+int qemu_chr_fe_write(CharBackend *be, const uint8_t *buf, int len);
+
+/**
+ * @qemu_chr_fe_write_all:
+ *
+ * Write data to a character backend from the front end.  This function will
+ * send data from the front end to the back end.  Unlike @qemu_chr_fe_write,
+ * this function will block if the back end cannot consume all of the data
+ * attempted to be written.  This function is thread-safe.
+ *
+ * @buf the data
+ * @len the number of bytes to send
+ *
+ * Returns: the number of bytes consumed (0 if no assicated Chardev)
+ */
+int qemu_chr_fe_write_all(CharBackend *be, const uint8_t *buf, int len);
+
+/**
+ * @qemu_chr_fe_read_all:
+ *
+ * Read data to a buffer from the back end.
+ *
+ * @buf the data buffer
+ * @len the number of bytes to read
+ *
+ * Returns: the number of bytes read (0 if no assicated Chardev)
+ */
+int qemu_chr_fe_read_all(CharBackend *be, uint8_t *buf, int len);
+
+/**
+ * @qemu_chr_fe_ioctl:
+ *
+ * Issue a device specific ioctl to a backend.  This function is thread-safe.
+ *
+ * @cmd see CHR_IOCTL_*
+ * @arg the data associated with @cmd
+ *
+ * Returns: if @cmd is not supported by the backend or there is no
+ *          associated Chardev, -ENOTSUP, otherwise the return
+ *          value depends on the semantics of @cmd
+ */
+int qemu_chr_fe_ioctl(CharBackend *be, int cmd, void *arg);
+
+/**
+ * @qemu_chr_fe_get_msgfd:
+ *
+ * For backends capable of fd passing, return the latest file descriptor passed
+ * by a client.
+ *
+ * Returns: -1 if fd passing isn't supported or there is no pending file
+ *          descriptor.  If a file descriptor is returned, subsequent calls to
+ *          this function will return -1 until a client sends a new file
+ *          descriptor.
+ */
+int qemu_chr_fe_get_msgfd(CharBackend *be);
+
+/**
+ * @qemu_chr_fe_get_msgfds:
+ *
+ * For backends capable of fd passing, return the number of file received
+ * descriptors and fills the fds array up to num elements
+ *
+ * Returns: -1 if fd passing isn't supported or there are no pending file
+ *          descriptors.  If file descriptors are returned, subsequent calls to
+ *          this function will return -1 until a client sends a new set of file
+ *          descriptors.
+ */
+int qemu_chr_fe_get_msgfds(CharBackend *be, int *fds, int num);
+
+/**
+ * @qemu_chr_fe_set_msgfds:
+ *
+ * For backends capable of fd passing, set an array of fds to be passed with
+ * the next send operation.
+ * A subsequent call to this function before calling a write function will
+ * result in overwriting the fd array with the new value without being send.
+ * Upon writing the message the fd array is freed.
+ *
+ * Returns: -1 if fd passing isn't supported or no associated Chardev.
+ */
+int qemu_chr_fe_set_msgfds(CharBackend *be, int *fds, int num);
+
+#endif /* QEMU_CHAR_FE_H */
diff --git a/include/chardev/char-io.h b/include/chardev/char-io.h
new file mode 100644
index 0000000000..9638da5100
--- /dev/null
+++ b/include/chardev/char-io.h
@@ -0,0 +1,46 @@
+/*
+ * 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.
+ */
+#ifndef CHAR_IO_H
+#define CHAR_IO_H
+
+#include "qemu-common.h"
+#include "io/channel.h"
+#include "chardev/char.h"
+
+/* Can only be used for read */
+GSource *io_add_watch_poll(Chardev *chr,
+                        QIOChannel *ioc,
+                        IOCanReadHandler *fd_can_read,
+                        QIOChannelFunc fd_read,
+                        gpointer user_data,
+                        GMainContext *context);
+
+void remove_fd_in_watch(Chardev *chr);
+
+int io_channel_send(QIOChannel *ioc, const void *buf, size_t len);
+
+int io_channel_send_full(QIOChannel *ioc, const void *buf, size_t len,
+                         int *fds, size_t nfds);
+
+#endif /* CHAR_IO_H */
diff --git a/include/chardev/char-mux.h b/include/chardev/char-mux.h
new file mode 100644
index 0000000000..8928977897
--- /dev/null
+++ b/include/chardev/char-mux.h
@@ -0,0 +1,64 @@
+/*
+ * 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.
+ */
+#ifndef CHAR_MUX_H
+#define CHAR_MUX_H
+
+#include "chardev/char.h"
+#include "chardev/char-fe.h"
+
+extern bool muxes_realized;
+
+#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 MuxChardev {
+    Chardev parent;
+    CharBackend *backends[MAX_MUX];
+    CharBackend chr;
+    int focus;
+    int mux_cnt;
+    int term_got_escape;
+    int max_size;
+    /* Intermediate input buffer catches 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;
+
+    /* Protected by the Chardev chr_write_lock.  */
+    int linestart;
+    int64_t timestamps_start;
+} MuxChardev;
+
+#define MUX_CHARDEV(obj) OBJECT_CHECK(MuxChardev, (obj), TYPE_CHARDEV_MUX)
+#define CHARDEV_IS_MUX(chr)                             \
+    object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_MUX)
+
+void mux_chr_set_handlers(Chardev *chr, GMainContext *context);
+void mux_set_focus(Chardev *chr, int focus);
+void mux_chr_send_all_event(Chardev *chr, int event);
+
+#endif /* CHAR_MUX_H */
diff --git a/include/chardev/char-parallel.h b/include/chardev/char-parallel.h
new file mode 100644
index 0000000000..3284a1b96b
--- /dev/null
+++ b/include/chardev/char-parallel.h
@@ -0,0 +1,50 @@
+/*
+ * 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.
+ */
+#ifndef CHAR_PARALLEL_H
+#define CHAR_PARALLEL_H
+
+#include "chardev/char.h"
+
+#if defined(__linux__) || defined(__FreeBSD__) ||               \
+    defined(__FreeBSD_kernel__) || defined(__DragonFly__)
+#define HAVE_CHARDEV_PARPORT 1
+#endif
+
+#define CHR_IOCTL_PP_READ_DATA        3
+#define CHR_IOCTL_PP_WRITE_DATA       4
+#define CHR_IOCTL_PP_READ_CONTROL     5
+#define CHR_IOCTL_PP_WRITE_CONTROL    6
+#define CHR_IOCTL_PP_READ_STATUS      7
+#define CHR_IOCTL_PP_EPP_READ_ADDR    8
+#define CHR_IOCTL_PP_EPP_READ         9
+#define CHR_IOCTL_PP_EPP_WRITE_ADDR  10
+#define CHR_IOCTL_PP_EPP_WRITE       11
+#define CHR_IOCTL_PP_DATA_DIR        12
+
+struct ParallelIOArg {
+    void *buffer;
+    int count;
+};
+
+#endif /* CHAR_PARALLEL_H */
diff --git a/include/chardev/char-serial.h b/include/chardev/char-serial.h
new file mode 100644
index 0000000000..cb2e59e82a
--- /dev/null
+++ b/include/chardev/char-serial.h
@@ -0,0 +1,57 @@
+/*
+ * 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.
+ */
+#ifndef CHAR_SERIAL_H
+#define CHAR_SERIAL_H
+
+#include "chardev/char.h"
+
+#ifdef _WIN32
+#define HAVE_CHARDEV_SERIAL 1
+#elif defined(__linux__) || defined(__sun__) || defined(__FreeBSD__)    \
+    || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \
+    || defined(__GLIBC__)
+#define HAVE_CHARDEV_SERIAL 1
+#endif
+
+#define CHR_IOCTL_SERIAL_SET_PARAMS   1
+typedef struct {
+    int speed;
+    int parity;
+    int data_bits;
+    int stop_bits;
+} QEMUSerialSetParams;
+
+#define CHR_IOCTL_SERIAL_SET_BREAK    2
+
+#define CHR_IOCTL_SERIAL_SET_TIOCM   13
+#define CHR_IOCTL_SERIAL_GET_TIOCM   14
+
+#define CHR_TIOCM_CTS   0x020
+#define CHR_TIOCM_CAR   0x040
+#define CHR_TIOCM_DSR   0x100
+#define CHR_TIOCM_RI    0x080
+#define CHR_TIOCM_DTR   0x002
+#define CHR_TIOCM_RTS   0x004
+
+#endif
diff --git a/include/chardev/char-win-stdio.h b/include/chardev/char-win-stdio.h
new file mode 100644
index 0000000000..d7314f734d
--- /dev/null
+++ b/include/chardev/char-win-stdio.h
@@ -0,0 +1,29 @@
+/*
+ * 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.
+ */
+#ifndef CHAR_WIN_STDIO_H
+#define CHAR_WIN_STDIO_H
+
+#define TYPE_CHARDEV_WIN_STDIO "chardev-win-stdio"
+
+#endif /* CHAR_WIN_STDIO_H */
diff --git a/include/chardev/char-win.h b/include/chardev/char-win.h
new file mode 100644
index 0000000000..fa59e9e423
--- /dev/null
+++ b/include/chardev/char-win.h
@@ -0,0 +1,51 @@
+/*
+ * 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.
+ */
+#ifndef CHAR_WIN_H
+#define CHAR_WIN_H
+
+#include "chardev/char.h"
+
+typedef struct {
+    Chardev parent;
+
+    bool keep_open; /* console do not close file */
+    HANDLE file, hrecv, hsend;
+    OVERLAPPED orecv;
+    BOOL fpipe;
+
+    /* Protected by the Chardev chr_write_lock.  */
+    OVERLAPPED osend;
+} WinChardev;
+
+#define NSENDBUF 2048
+#define NRECVBUF 2048
+
+#define TYPE_CHARDEV_WIN "chardev-win"
+#define WIN_CHARDEV(obj) OBJECT_CHECK(WinChardev, (obj), TYPE_CHARDEV_WIN)
+
+void win_chr_set_file(Chardev *chr, HANDLE file, bool keep_open);
+int win_chr_serial_init(Chardev *chr, const char *filename, Error **errp);
+int win_chr_pipe_poll(void *opaque);
+
+#endif /* CHAR_WIN_H */
diff --git a/include/chardev/char.h b/include/chardev/char.h
new file mode 100644
index 0000000000..8a9ade4931
--- /dev/null
+++ b/include/chardev/char.h
@@ -0,0 +1,229 @@
+#ifndef QEMU_CHAR_H
+#define QEMU_CHAR_H
+
+#include "qemu-common.h"
+#include "qemu/option.h"
+#include "qemu/main-loop.h"
+#include "qemu/bitmap.h"
+#include "qom/object.h"
+
+#define IAC_EOR 239
+#define IAC_SE 240
+#define IAC_NOP 241
+#define IAC_BREAK 243
+#define IAC_IP 244
+#define IAC_SB 250
+#define IAC 255
+
+/* character device */
+typedef struct CharBackend CharBackend;
+
+typedef enum {
+    CHR_EVENT_BREAK, /* serial break char */
+    CHR_EVENT_OPENED, /* new connection established */
+    CHR_EVENT_MUX_IN, /* mux-focus was set to this terminal */
+    CHR_EVENT_MUX_OUT, /* mux-focus will move on */
+    CHR_EVENT_CLOSED /* connection closed */
+} QEMUChrEvent;
+
+#define CHR_READ_BUF_LEN 4096
+
+typedef enum {
+    /* Whether the chardev peer is able to close and
+     * reopen the data channel, thus requiring support
+     * for qemu_chr_wait_connected() to wait for a
+     * valid connection */
+    QEMU_CHAR_FEATURE_RECONNECTABLE,
+    /* Whether it is possible to send/recv file descriptors
+     * over the data channel */
+    QEMU_CHAR_FEATURE_FD_PASS,
+    /* Whether replay or record mode is enabled */
+    QEMU_CHAR_FEATURE_REPLAY,
+
+    QEMU_CHAR_FEATURE_LAST,
+} ChardevFeature;
+
+#define qemu_chr_replay(chr) qemu_chr_has_feature(chr, QEMU_CHAR_FEATURE_REPLAY)
+
+struct Chardev {
+    Object parent_obj;
+
+    QemuMutex chr_write_lock;
+    CharBackend *be;
+    char *label;
+    char *filename;
+    int logfd;
+    int be_open;
+    GSource *gsource;
+    DECLARE_BITMAP(features, QEMU_CHAR_FEATURE_LAST);
+};
+
+/**
+ * @qemu_chr_new_from_opts:
+ *
+ * Create a new character backend from a QemuOpts list.
+ *
+ * @opts see qemu-config.c for a list of valid options
+ *
+ * Returns: a new character backend
+ */
+Chardev *qemu_chr_new_from_opts(QemuOpts *opts,
+                                Error **errp);
+
+/**
+ * @qemu_chr_parse_common:
+ *
+ * Parse the common options available to all character backends.
+ *
+ * @opts the options that still need parsing
+ * @backend a new backend
+ */
+void qemu_chr_parse_common(QemuOpts *opts, ChardevCommon *backend);
+
+/**
+ * @qemu_chr_new:
+ *
+ * Create a new character backend from a URI.
+ *
+ * @label the name of the backend
+ * @filename the URI
+ *
+ * Returns: a new character backend
+ */
+Chardev *qemu_chr_new(const char *label, const char *filename);
+
+/**
+ * @qemu_chr_cleanup:
+ *
+ * Delete all chardevs (when leaving qemu)
+ */
+void qemu_chr_cleanup(void);
+
+/**
+ * @qemu_chr_new_noreplay:
+ *
+ * Create a new character backend from a URI.
+ * Character device communications are not written
+ * into the replay log.
+ *
+ * @label the name of the backend
+ * @filename the URI
+ *
+ * Returns: a new character backend
+ */
+Chardev *qemu_chr_new_noreplay(const char *label, const char *filename);
+
+/**
+ * @qemu_chr_be_can_write:
+ *
+ * Determine how much data the front end can currently accept.  This function
+ * returns the number of bytes the front end can accept.  If it returns 0, the
+ * front end cannot receive data at the moment.  The function must be polled
+ * to determine when data can be received.
+ *
+ * Returns: the number of bytes the front end can receive via @qemu_chr_be_write
+ */
+int qemu_chr_be_can_write(Chardev *s);
+
+/**
+ * @qemu_chr_be_write:
+ *
+ * Write data from the back end to the front end.  Before issuing this call,
+ * the caller should call @qemu_chr_be_can_write to determine how much data
+ * the front end can currently accept.
+ *
+ * @buf a buffer to receive data from the front end
+ * @len the number of bytes to receive from the front end
+ */
+void qemu_chr_be_write(Chardev *s, uint8_t *buf, int len);
+
+/**
+ * @qemu_chr_be_write_impl:
+ *
+ * Implementation of back end writing. Used by replay module.
+ *
+ * @buf a buffer to receive data from the front end
+ * @len the number of bytes to receive from the front end
+ */
+void qemu_chr_be_write_impl(Chardev *s, uint8_t *buf, int len);
+
+/**
+ * @qemu_chr_be_event:
+ *
+ * Send an event from the back end to the front end.
+ *
+ * @event the event to send
+ */
+void qemu_chr_be_event(Chardev *s, int event);
+
+int qemu_chr_add_client(Chardev *s, int fd);
+Chardev *qemu_chr_find(const char *name);
+
+bool qemu_chr_has_feature(Chardev *chr,
+                          ChardevFeature feature);
+void qemu_chr_set_feature(Chardev *chr,
+                          ChardevFeature feature);
+QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename);
+int qemu_chr_write(Chardev *s, const uint8_t *buf, int len, bool write_all);
+#define qemu_chr_write_all(s, buf, len) qemu_chr_write(s, buf, len, true)
+int qemu_chr_wait_connected(Chardev *chr, Error **errp);
+
+#define TYPE_CHARDEV "chardev"
+#define CHARDEV(obj) OBJECT_CHECK(Chardev, (obj), TYPE_CHARDEV)
+#define CHARDEV_CLASS(klass) \
+    OBJECT_CLASS_CHECK(ChardevClass, (klass), TYPE_CHARDEV)
+#define CHARDEV_GET_CLASS(obj) \
+    OBJECT_GET_CLASS(ChardevClass, (obj), TYPE_CHARDEV)
+
+#define TYPE_CHARDEV_NULL "chardev-null"
+#define TYPE_CHARDEV_MUX "chardev-mux"
+#define TYPE_CHARDEV_RINGBUF "chardev-ringbuf"
+#define TYPE_CHARDEV_PTY "chardev-pty"
+#define TYPE_CHARDEV_CONSOLE "chardev-console"
+#define TYPE_CHARDEV_STDIO "chardev-stdio"
+#define TYPE_CHARDEV_PIPE "chardev-pipe"
+#define TYPE_CHARDEV_MEMORY "chardev-memory"
+#define TYPE_CHARDEV_PARALLEL "chardev-parallel"
+#define TYPE_CHARDEV_FILE "chardev-file"
+#define TYPE_CHARDEV_SERIAL "chardev-serial"
+#define TYPE_CHARDEV_SOCKET "chardev-socket"
+#define TYPE_CHARDEV_UDP "chardev-udp"
+
+#define CHARDEV_IS_RINGBUF(chr) \
+    object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_RINGBUF)
+#define CHARDEV_IS_PTY(chr) \
+    object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_PTY)
+
+typedef struct ChardevClass {
+    ObjectClass parent_class;
+
+    bool internal; /* TODO: eventually use TYPE_USER_CREATABLE */
+    void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
+
+    void (*open)(Chardev *chr, ChardevBackend *backend,
+                 bool *be_opened, Error **errp);
+
+    int (*chr_write)(Chardev *s, const uint8_t *buf, int len);
+    int (*chr_sync_read)(Chardev *s, const uint8_t *buf, int len);
+    GSource *(*chr_add_watch)(Chardev *s, GIOCondition cond);
+    void (*chr_update_read_handler)(Chardev *s, GMainContext *context);
+    int (*chr_ioctl)(Chardev *s, int cmd, void *arg);
+    int (*get_msgfds)(Chardev *s, int* fds, int num);
+    int (*set_msgfds)(Chardev *s, int *fds, int num);
+    int (*chr_add_client)(Chardev *chr, int fd);
+    int (*chr_wait_connected)(Chardev *chr, Error **errp);
+    void (*chr_disconnect)(Chardev *chr);
+    void (*chr_accept_input)(Chardev *chr);
+    void (*chr_set_echo)(Chardev *chr, bool echo);
+    void (*chr_set_fe_open)(Chardev *chr, int fe_open);
+} ChardevClass;
+
+Chardev *qemu_chardev_new(const char *id, const char *typename,
+                          ChardevBackend *backend, Error **errp);
+
+extern int term_escape_char;
+
+/* console.c */
+void qemu_chr_parse_vc(QemuOpts *opts, ChardevBackend *backend, Error **errp);
+
+#endif
diff --git a/include/hw/char/bcm2835_aux.h b/include/hw/char/bcm2835_aux.h
index 6865f154bc..cdbf7e3e37 100644
--- a/include/hw/char/bcm2835_aux.h
+++ b/include/hw/char/bcm2835_aux.h
@@ -9,7 +9,7 @@
 #define BCM2835_AUX_H
 
 #include "hw/sysbus.h"
-#include "sysemu/char.h"
+#include "chardev/char-fe.h"
 
 #define TYPE_BCM2835_AUX "bcm2835-aux"
 #define BCM2835_AUX(obj) OBJECT_CHECK(BCM2835AuxState, (obj), TYPE_BCM2835_AUX)
diff --git a/include/hw/char/cadence_uart.h b/include/hw/char/cadence_uart.h
index c836db4b74..118e3f10de 100644
--- a/include/hw/char/cadence_uart.h
+++ b/include/hw/char/cadence_uart.h
@@ -19,7 +19,7 @@
 #ifndef CADENCE_UART_H
 
 #include "hw/sysbus.h"
-#include "sysemu/char.h"
+#include "chardev/char-fe.h"
 #include "qemu/timer.h"
 
 #define CADENCE_UART_RX_FIFO_SIZE           16
diff --git a/include/hw/char/digic-uart.h b/include/hw/char/digic-uart.h
index 340c8e1111..de9a3e3551 100644
--- a/include/hw/char/digic-uart.h
+++ b/include/hw/char/digic-uart.h
@@ -19,7 +19,7 @@
 #define HW_CHAR_DIGIC_UART_H
 
 #include "hw/sysbus.h"
-#include "sysemu/char.h"
+#include "chardev/char-fe.h"
 
 #define TYPE_DIGIC_UART "digic-uart"
 #define DIGIC_UART(obj) \
diff --git a/include/hw/char/imx_serial.h b/include/hw/char/imx_serial.h
index 4cc3fbc395..baeec3183f 100644
--- a/include/hw/char/imx_serial.h
+++ b/include/hw/char/imx_serial.h
@@ -19,7 +19,7 @@
 #define IMX_SERIAL_H
 
 #include "hw/sysbus.h"
-#include "sysemu/char.h"
+#include "chardev/char-fe.h"
 
 #define TYPE_IMX_SERIAL "imx.serial"
 #define IMX_SERIAL(obj) OBJECT_CHECK(IMXSerialState, (obj), TYPE_IMX_SERIAL)
diff --git a/include/hw/char/serial.h b/include/hw/char/serial.h
index daebb076c2..c4daf11a14 100644
--- a/include/hw/char/serial.h
+++ b/include/hw/char/serial.h
@@ -28,10 +28,10 @@
 
 #include "hw/hw.h"
 #include "sysemu/sysemu.h"
-#include "sysemu/char.h"
+#include "chardev/char-fe.h"
 #include "exec/memory.h"
 #include "qemu/fifo8.h"
-#include "sysemu/char.h"
+#include "chardev/char.h"
 
 #define UART_FIFO_LENGTH    16      /* 16550A Fifo Length */
 
diff --git a/include/hw/char/stm32f2xx_usart.h b/include/hw/char/stm32f2xx_usart.h
index 3267523270..9d03a7527c 100644
--- a/include/hw/char/stm32f2xx_usart.h
+++ b/include/hw/char/stm32f2xx_usart.h
@@ -26,7 +26,7 @@
 #define HW_STM32F2XX_USART_H
 
 #include "hw/sysbus.h"
-#include "sysemu/char.h"
+#include "chardev/char-fe.h"
 #include "hw/hw.h"
 
 #define USART_SR   0x00
diff --git a/include/sysemu/char.h b/include/sysemu/char.h
deleted file mode 100644
index fffc0f40d4..0000000000
--- a/include/sysemu/char.h
+++ /dev/null
@@ -1,499 +0,0 @@
-#ifndef QEMU_CHAR_H
-#define QEMU_CHAR_H
-
-#include "qemu-common.h"
-#include "qemu/option.h"
-#include "qemu/main-loop.h"
-#include "qemu/bitmap.h"
-#include "qom/object.h"
-
-#define IAC_EOR 239
-#define IAC_SE 240
-#define IAC_NOP 241
-#define IAC_BREAK 243
-#define IAC_IP 244
-#define IAC_SB 250
-#define IAC 255
-
-/* character device */
-
-typedef enum {
-    CHR_EVENT_BREAK, /* serial break char */
-    CHR_EVENT_OPENED, /* new connection established */
-    CHR_EVENT_MUX_IN, /* mux-focus was set to this terminal */
-    CHR_EVENT_MUX_OUT, /* mux-focus will move on */
-    CHR_EVENT_CLOSED /* connection closed */
-} QEMUChrEvent;
-
-#define CHR_READ_BUF_LEN 4096
-
-#define CHR_IOCTL_SERIAL_SET_PARAMS   1
-typedef struct {
-    int speed;
-    int parity;
-    int data_bits;
-    int stop_bits;
-} QEMUSerialSetParams;
-
-#define CHR_IOCTL_SERIAL_SET_BREAK    2
-
-#define CHR_IOCTL_PP_READ_DATA        3
-#define CHR_IOCTL_PP_WRITE_DATA       4
-#define CHR_IOCTL_PP_READ_CONTROL     5
-#define CHR_IOCTL_PP_WRITE_CONTROL    6
-#define CHR_IOCTL_PP_READ_STATUS      7
-#define CHR_IOCTL_PP_EPP_READ_ADDR    8
-#define CHR_IOCTL_PP_EPP_READ         9
-#define CHR_IOCTL_PP_EPP_WRITE_ADDR  10
-#define CHR_IOCTL_PP_EPP_WRITE       11
-#define CHR_IOCTL_PP_DATA_DIR        12
-
-struct ParallelIOArg {
-    void *buffer;
-    int count;
-};
-
-#define CHR_IOCTL_SERIAL_SET_TIOCM   13
-#define CHR_IOCTL_SERIAL_GET_TIOCM   14
-
-#define CHR_TIOCM_CTS	0x020
-#define CHR_TIOCM_CAR	0x040
-#define CHR_TIOCM_DSR	0x100
-#define CHR_TIOCM_RI	0x080
-#define CHR_TIOCM_DTR	0x002
-#define CHR_TIOCM_RTS	0x004
-
-typedef void IOEventHandler(void *opaque, int event);
-
-typedef enum {
-    /* Whether the chardev peer is able to close and
-     * reopen the data channel, thus requiring support
-     * for qemu_chr_wait_connected() to wait for a
-     * valid connection */
-    QEMU_CHAR_FEATURE_RECONNECTABLE,
-    /* Whether it is possible to send/recv file descriptors
-     * over the data channel */
-    QEMU_CHAR_FEATURE_FD_PASS,
-    /* Whether replay or record mode is enabled */
-    QEMU_CHAR_FEATURE_REPLAY,
-
-    QEMU_CHAR_FEATURE_LAST,
-} ChardevFeature;
-
-/* This is the backend as seen by frontend, the actual backend is
- * Chardev */
-typedef struct CharBackend {
-    Chardev *chr;
-    IOEventHandler *chr_event;
-    IOCanReadHandler *chr_can_read;
-    IOReadHandler *chr_read;
-    void *opaque;
-    int tag;
-    int fe_open;
-} CharBackend;
-
-struct Chardev {
-    Object parent_obj;
-
-    QemuMutex chr_write_lock;
-    CharBackend *be;
-    char *label;
-    char *filename;
-    int logfd;
-    int be_open;
-    GSource *gsource;
-    DECLARE_BITMAP(features, QEMU_CHAR_FEATURE_LAST);
-};
-
-/**
- * @qemu_chr_new_from_opts:
- *
- * Create a new character backend from a QemuOpts list.
- *
- * @opts see qemu-config.c for a list of valid options
- *
- * Returns: a new character backend
- */
-Chardev *qemu_chr_new_from_opts(QemuOpts *opts,
-                                Error **errp);
-
-/**
- * @qemu_chr_parse_common:
- *
- * Parse the common options available to all character backends.
- *
- * @opts the options that still need parsing
- * @backend a new backend
- */
-void qemu_chr_parse_common(QemuOpts *opts, ChardevCommon *backend);
-
-/**
- * @qemu_chr_new:
- *
- * Create a new character backend from a URI.
- *
- * @label the name of the backend
- * @filename the URI
- *
- * Returns: a new character backend
- */
-Chardev *qemu_chr_new(const char *label, const char *filename);
-
-
-/**
- * @qemu_chr_fe_disconnect:
- *
- * Close a fd accpeted by character backend.
- * Without associated Chardev, do nothing.
- */
-void qemu_chr_fe_disconnect(CharBackend *be);
-
-/**
- * @qemu_chr_cleanup:
- *
- * Delete all chardevs (when leaving qemu)
- */
-void qemu_chr_cleanup(void);
-
-/**
- * @qemu_chr_fe_wait_connected:
- *
- * Wait for characted backend to be connected, return < 0 on error or
- * if no assicated Chardev.
- */
-int qemu_chr_fe_wait_connected(CharBackend *be, Error **errp);
-
-/**
- * @qemu_chr_new_noreplay:
- *
- * Create a new character backend from a URI.
- * Character device communications are not written
- * into the replay log.
- *
- * @label the name of the backend
- * @filename the URI
- *
- * Returns: a new character backend
- */
-Chardev *qemu_chr_new_noreplay(const char *label, const char *filename);
-
-/**
- * @qemu_chr_fe_set_echo:
- *
- * Ask the backend to override its normal echo setting.  This only really
- * applies to the stdio backend and is used by the QMP server such that you
- * can see what you type if you try to type QMP commands.
- * Without associated Chardev, do nothing.
- *
- * @echo true to enable echo, false to disable echo
- */
-void qemu_chr_fe_set_echo(CharBackend *be, bool echo);
-
-/**
- * @qemu_chr_fe_set_open:
- *
- * Set character frontend open status.  This is an indication that the
- * front end is ready (or not) to begin doing I/O.
- * Without associated Chardev, do nothing.
- */
-void qemu_chr_fe_set_open(CharBackend *be, int fe_open);
-
-/**
- * @qemu_chr_fe_printf:
- *
- * Write to a character backend using a printf style interface.  This
- * function is thread-safe. It does nothing without associated
- * Chardev.
- *
- * @fmt see #printf
- */
-void qemu_chr_fe_printf(CharBackend *be, const char *fmt, ...)
-    GCC_FMT_ATTR(2, 3);
-
-/**
- * @qemu_chr_fe_add_watch:
- *
- * If the backend is connected, create and add a #GSource that fires
- * when the given condition (typically G_IO_OUT|G_IO_HUP or G_IO_HUP)
- * is active; return the #GSource's tag.  If it is disconnected,
- * or without associated Chardev, return 0.
- *
- * @cond the condition to poll for
- * @func the function to call when the condition happens
- * @user_data the opaque pointer to pass to @func
- *
- * Returns: the source tag
- */
-guint qemu_chr_fe_add_watch(CharBackend *be, GIOCondition cond,
-                            GIOFunc func, void *user_data);
-
-/**
- * @qemu_chr_fe_write:
- *
- * Write data to a character backend from the front end.  This function
- * will send data from the front end to the back end.  This function
- * is thread-safe.
- *
- * @buf the data
- * @len the number of bytes to send
- *
- * Returns: the number of bytes consumed (0 if no assicated Chardev)
- */
-int qemu_chr_fe_write(CharBackend *be, const uint8_t *buf, int len);
-
-/**
- * @qemu_chr_fe_write_all:
- *
- * Write data to a character backend from the front end.  This function will
- * send data from the front end to the back end.  Unlike @qemu_chr_fe_write,
- * this function will block if the back end cannot consume all of the data
- * attempted to be written.  This function is thread-safe.
- *
- * @buf the data
- * @len the number of bytes to send
- *
- * Returns: the number of bytes consumed (0 if no assicated Chardev)
- */
-int qemu_chr_fe_write_all(CharBackend *be, const uint8_t *buf, int len);
-
-/**
- * @qemu_chr_fe_read_all:
- *
- * Read data to a buffer from the back end.
- *
- * @buf the data buffer
- * @len the number of bytes to read
- *
- * Returns: the number of bytes read (0 if no assicated Chardev)
- */
-int qemu_chr_fe_read_all(CharBackend *be, uint8_t *buf, int len);
-
-/**
- * @qemu_chr_fe_ioctl:
- *
- * Issue a device specific ioctl to a backend.  This function is thread-safe.
- *
- * @cmd see CHR_IOCTL_*
- * @arg the data associated with @cmd
- *
- * Returns: if @cmd is not supported by the backend or there is no
- *          associated Chardev, -ENOTSUP, otherwise the return
- *          value depends on the semantics of @cmd
- */
-int qemu_chr_fe_ioctl(CharBackend *be, int cmd, void *arg);
-
-/**
- * @qemu_chr_fe_get_msgfd:
- *
- * For backends capable of fd passing, return the latest file descriptor passed
- * by a client.
- *
- * Returns: -1 if fd passing isn't supported or there is no pending file
- *          descriptor.  If a file descriptor is returned, subsequent calls to
- *          this function will return -1 until a client sends a new file
- *          descriptor.
- */
-int qemu_chr_fe_get_msgfd(CharBackend *be);
-
-/**
- * @qemu_chr_fe_get_msgfds:
- *
- * For backends capable of fd passing, return the number of file received
- * descriptors and fills the fds array up to num elements
- *
- * Returns: -1 if fd passing isn't supported or there are no pending file
- *          descriptors.  If file descriptors are returned, subsequent calls to
- *          this function will return -1 until a client sends a new set of file
- *          descriptors.
- */
-int qemu_chr_fe_get_msgfds(CharBackend *be, int *fds, int num);
-
-/**
- * @qemu_chr_fe_set_msgfds:
- *
- * For backends capable of fd passing, set an array of fds to be passed with
- * the next send operation.
- * A subsequent call to this function before calling a write function will
- * result in overwriting the fd array with the new value without being send.
- * Upon writing the message the fd array is freed.
- *
- * Returns: -1 if fd passing isn't supported or no associated Chardev.
- */
-int qemu_chr_fe_set_msgfds(CharBackend *be, int *fds, int num);
-
-/**
- * @qemu_chr_be_can_write:
- *
- * Determine how much data the front end can currently accept.  This function
- * returns the number of bytes the front end can accept.  If it returns 0, the
- * front end cannot receive data at the moment.  The function must be polled
- * to determine when data can be received.
- *
- * Returns: the number of bytes the front end can receive via @qemu_chr_be_write
- */
-int qemu_chr_be_can_write(Chardev *s);
-
-/**
- * @qemu_chr_be_write:
- *
- * Write data from the back end to the front end.  Before issuing this call,
- * the caller should call @qemu_chr_be_can_write to determine how much data
- * the front end can currently accept.
- *
- * @buf a buffer to receive data from the front end
- * @len the number of bytes to receive from the front end
- */
-void qemu_chr_be_write(Chardev *s, uint8_t *buf, int len);
-
-/**
- * @qemu_chr_be_write_impl:
- *
- * Implementation of back end writing. Used by replay module.
- *
- * @buf a buffer to receive data from the front end
- * @len the number of bytes to receive from the front end
- */
-void qemu_chr_be_write_impl(Chardev *s, uint8_t *buf, int len);
-
-/**
- * @qemu_chr_be_event:
- *
- * Send an event from the back end to the front end.
- *
- * @event the event to send
- */
-void qemu_chr_be_event(Chardev *s, int event);
-
-/**
- * @qemu_chr_fe_init:
- *
- * Initializes a front end for the given CharBackend and
- * Chardev. Call qemu_chr_fe_deinit() to remove the association and
- * release the driver.
- *
- * Returns: false on error.
- */
-bool qemu_chr_fe_init(CharBackend *b, Chardev *s, Error **errp);
-
-/**
- * @qemu_chr_fe_get_driver:
- *
- * Returns the driver associated with a CharBackend or NULL if no
- * associated Chardev.
- */
-Chardev *qemu_chr_fe_get_driver(CharBackend *be);
-
-/**
- * @qemu_chr_fe_deinit:
- *
- * Dissociate the CharBackend from the Chardev.
- *
- * Safe to call without associated Chardev.
- */
-void qemu_chr_fe_deinit(CharBackend *b);
-
-/**
- * @qemu_chr_fe_set_handlers:
- * @b: a CharBackend
- * @fd_can_read: callback to get the amount of data the frontend may
- *               receive
- * @fd_read: callback to receive data from char
- * @fd_event: event callback
- * @opaque: an opaque pointer for the callbacks
- * @context: a main loop context or NULL for the default
- * @set_open: whether to call qemu_chr_fe_set_open() implicitely when
- * any of the handler is non-NULL
- *
- * Set the front end char handlers. The front end takes the focus if
- * any of the handler is non-NULL.
- *
- * Without associated Chardev, nothing is changed.
- */
-void qemu_chr_fe_set_handlers(CharBackend *b,
-                              IOCanReadHandler *fd_can_read,
-                              IOReadHandler *fd_read,
-                              IOEventHandler *fd_event,
-                              void *opaque,
-                              GMainContext *context,
-                              bool set_open);
-
-/**
- * @qemu_chr_fe_take_focus:
- *
- * Take the focus (if the front end is muxed).
- *
- * Without associated Chardev, nothing is changed.
- */
-void qemu_chr_fe_take_focus(CharBackend *b);
-
-void qemu_chr_fe_accept_input(CharBackend *be);
-int qemu_chr_add_client(Chardev *s, int fd);
-Chardev *qemu_chr_find(const char *name);
-
-bool qemu_chr_has_feature(Chardev *chr,
-                          ChardevFeature feature);
-void qemu_chr_set_feature(Chardev *chr,
-                          ChardevFeature feature);
-QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename);
-int qemu_chr_write_all(Chardev *s, const uint8_t *buf, int len);
-int qemu_chr_wait_connected(Chardev *chr, Error **errp);
-
-#define TYPE_CHARDEV "chardev"
-#define CHARDEV(obj) OBJECT_CHECK(Chardev, (obj), TYPE_CHARDEV)
-#define CHARDEV_CLASS(klass) \
-    OBJECT_CLASS_CHECK(ChardevClass, (klass), TYPE_CHARDEV)
-#define CHARDEV_GET_CLASS(obj) \
-    OBJECT_GET_CLASS(ChardevClass, (obj), TYPE_CHARDEV)
-
-#define TYPE_CHARDEV_NULL "chardev-null"
-#define TYPE_CHARDEV_MUX "chardev-mux"
-#define TYPE_CHARDEV_RINGBUF "chardev-ringbuf"
-#define TYPE_CHARDEV_PTY "chardev-pty"
-#define TYPE_CHARDEV_CONSOLE "chardev-console"
-#define TYPE_CHARDEV_STDIO "chardev-stdio"
-#define TYPE_CHARDEV_PIPE "chardev-pipe"
-#define TYPE_CHARDEV_MEMORY "chardev-memory"
-#define TYPE_CHARDEV_PARALLEL "chardev-parallel"
-#define TYPE_CHARDEV_FILE "chardev-file"
-#define TYPE_CHARDEV_SERIAL "chardev-serial"
-#define TYPE_CHARDEV_SOCKET "chardev-socket"
-#define TYPE_CHARDEV_UDP "chardev-udp"
-
-#define CHARDEV_IS_RINGBUF(chr) \
-    object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_RINGBUF)
-#define CHARDEV_IS_PTY(chr) \
-    object_dynamic_cast(OBJECT(chr), TYPE_CHARDEV_PTY)
-
-typedef struct ChardevClass {
-    ObjectClass parent_class;
-
-    bool internal; /* TODO: eventually use TYPE_USER_CREATABLE */
-    void (*parse)(QemuOpts *opts, ChardevBackend *backend, Error **errp);
-
-    void (*open)(Chardev *chr, ChardevBackend *backend,
-                 bool *be_opened, Error **errp);
-
-    int (*chr_write)(Chardev *s, const uint8_t *buf, int len);
-    int (*chr_sync_read)(Chardev *s, const uint8_t *buf, int len);
-    GSource *(*chr_add_watch)(Chardev *s, GIOCondition cond);
-    void (*chr_update_read_handler)(Chardev *s, GMainContext *context);
-    int (*chr_ioctl)(Chardev *s, int cmd, void *arg);
-    int (*get_msgfds)(Chardev *s, int* fds, int num);
-    int (*set_msgfds)(Chardev *s, int *fds, int num);
-    int (*chr_add_client)(Chardev *chr, int fd);
-    int (*chr_wait_connected)(Chardev *chr, Error **errp);
-    void (*chr_disconnect)(Chardev *chr);
-    void (*chr_accept_input)(Chardev *chr);
-    void (*chr_set_echo)(Chardev *chr, bool echo);
-    void (*chr_set_fe_open)(Chardev *chr, int fe_open);
-} ChardevClass;
-
-Chardev *qemu_chardev_new(const char *id, const char *typename,
-                          ChardevBackend *backend, Error **errp);
-
-extern int term_escape_char;
-
-/* console.c */
-void qemu_chr_parse_vc(QemuOpts *opts, ChardevBackend *backend, Error **errp);
-
-#endif