Remove libuvt

uvt is not used inside of kmscon. Moved into a separate library if
some-one is interested.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>

12 files changed, 0 insertions, 2452 deletions

diff --git a/.gitignore b/.gitignore
index 912ec5b..1943279 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,7 +19,6 @@ configure
 *.tar.xz
 libtool
 libeloop.pc
-libuvt.pc
 libuterm.pc
 m4/
 stamp-*
diff --git a/Makefile.am b/Makefile.am
index 52a14eb..11c2d30 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -11,10 +11,6 @@ LIBELOOP_CURRENT = 1
 LIBELOOP_REVISION = 0
 LIBELOOP_AGE = 0
 
-LIBUVT_CURRENT = 1
-LIBUVT_REVISION = 0
-LIBUVT_AGE = 0
-
 LIBUTERM_CURRENT = 1
 LIBUTERM_REVISION = 0
 LIBUTERM_AGE = 0
@@ -40,10 +36,8 @@ EXTRA_DIST = \
 	docs/kmscon.service \
 	docs/kmsconvt@.service \
 	docs/pc/libeloop.pc.in \
-	docs/pc/libuvt.pc.in \
 	docs/pc/libuterm.pc.in \
 	docs/sym/libeloop.sym \
-	docs/sym/libuvt.sym \
 	docs/sym/libuterm.sym
 CLEANFILES =
 pkgconfigdir = $(libdir)/pkgconfig
@@ -237,39 +231,6 @@ libeloop_la_LIBADD += $(DBUS_LIBS)
 endif
 
 #
-# libuvt
-# Implementation of Virtual Terminals in user-space with the help of CUSE/FUSE
-# so we can provide character-device drivers in user-space. Aims to be 100%
-# compatible but also provides many other use-cases.
-#
-
-if BUILD_ENABLE_UVT
-lib_LTLIBRARIES += libuvt.la
-include_HEADERS += src/uvt.h
-pkgconfig_DATA += docs/pc/libuvt.pc
-endif
-
-libuvt_la_SOURCES = \
-	src/uvt.h \
-	src/uvt_internal.h \
-	src/uvt_ctx.c \
-	src/uvt_cdev.c \
-	src/uvt_client.c \
-	src/uvt_tty_null.c
-libuvt_la_CPPFLAGS = \
-	$(AM_CPPFLAGS) \
-	$(FUSE_CFLAGS) \
-	-DFUSE_USE_VERSION=29
-libuvt_la_LIBADD = \
-	$(FUSE_LIBS) \
-	libshl.la
-EXTRA_libuvt_la_DEPENDENCIES = ${top_srcdir}/docs/sym/libuvt.sym
-libuvt_la_LDFLAGS = \
-	$(AM_LDFLAGS) \
-	-version-info $(LIBUVT_CURRENT):$(LIBUVT_REVISION):$(LIBUVT_AGE) \
-	-Wl,--version-script="$(top_srcdir)/docs/sym/libuvt.sym"
-
-#
 # libuterm
 # The uterm library provides helpers to create terminals in user-space. They
 # are not limited to text-based terminals but rather provide graphics contexts
diff --git a/README b/README
index 7e68498..244e817 100644
--- a/README
+++ b/README
@@ -94,7 +94,6 @@ Released tarballs can be found at:
     --enable-kmscon: Build kmscon application [default: on]
     --enable-eloop: Build eloop event loop library [default: off]
     --enable-uterm: Build uterm library [default: off]
-    --enable-uvt: Build UVT library [default: off]
 
 == Running ==
 
diff --git a/configure.ac b/configure.ac
index 6c975c5..01ae4fc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -100,11 +100,6 @@ PKG_CHECK_MODULES([PANGO], [pango pangoft2],
 AC_SUBST(PANGO_CFLAGS)
 AC_SUBST(PANGO_LIBS)
 
-PKG_CHECK_MODULES([FUSE], [fuse >= 2.9.0],
-                  [have_fuse=yes], [have_fuse=no])
-AC_SUBST(FUSE_CFLAGS)
-AC_SUBST(FUSE_LIBS)
-
 PKG_CHECK_MODULES([CAIRO], [cairo],
                   [have_cairo=yes], [have_cairo=no])
 AC_SUBST(CAIRO_CFLAGS)
@@ -149,18 +144,6 @@ elif test "x$enable_eloop" = "x" ; then
 fi
 AC_MSG_RESULT([$enable_eloop])
 
-# UVT
-AC_MSG_CHECKING([whether user wants UVT])
-AC_ARG_ENABLE([uvt],
-              [AS_HELP_STRING([--enable-uvt],
-                              [build uvt library])])
-if test "x$enable_all" = "xyes" ; then
-        enable_uvt="yes"
-elif test "x$enable_uvt" = "x" ; then
-        enable_uvt="no (default)"
-fi
-AC_MSG_RESULT([$enable_uvt])
-
 # uterm
 AC_MSG_CHECKING([whether user wants uterm])
 AC_ARG_ENABLE([uterm],
@@ -448,25 +431,6 @@ else
         eloop_missing="enable-eloop"
 fi
 
-# UVT
-uvt_avail=no
-uvt_missing=""
-if test ! "x$enable_uvt" = "xno" ; then
-        uvt_avail=yes
-        if test "x$have_fuse" = "xno" ; then
-                uvt_avail=no
-                uvt_missing="fuse"
-        fi
-
-        if test "x$uvt_avail" = "xno" ; then
-                if test "x$enable_uvt" = "xyes" ; then
-                        AC_ERROR([missing for UVT: $uvt_missing])
-                fi
-        fi
-else
-        uvt_missing="enable-uvt"
-fi
-
 # video fbdev
 video_fbdev_avail=no
 video_fbdev_missing=""
@@ -855,14 +819,6 @@ if test "x$video_fbdev_avail" = "xyes" ; then
         fi
 fi
 
-# UVT
-uvt_enabled=no
-if test "x$uvt_avail" = "xyes" ; then
-        if test "x${enable_uvt% *}" = "xyes" ; then
-                uvt_enabled=yes
-        fi
-fi
-
 # eloop
 eloop_enabled=no
 if test "x$eloop_avail" = "xyes" ; then
@@ -925,10 +881,6 @@ AM_CONDITIONAL([BUILD_ENABLE_ELOOP_DBUS],
 AM_CONDITIONAL([BUILD_ENABLE_ELOOP],
                [test "x$eloop_enabled" = "xyes"])
 
-# UVT
-AM_CONDITIONAL([BUILD_ENABLE_UVT],
-               [test "x$uvt_enabled" = "xyes"])
-
 # video fbdev
 if test "x$video_fbdev_enabled" = "xyes" ; then
         AC_DEFINE([BUILD_ENABLE_VIDEO_FBDEV], [1],
@@ -1117,7 +1069,6 @@ fi
 
 AC_CONFIG_FILES([Makefile
                  docs/pc/libeloop.pc
-                 docs/pc/libuvt.pc
                  docs/pc/libuterm.pc])
 AC_OUTPUT
 
@@ -1137,7 +1088,6 @@ AC_MSG_NOTICE([Build configuration:
   Applications and Libraries:
                kmscon: $kmscon_enabled ($kmscon_avail: $kmscon_missing)
                 uterm: $uterm_enabled ($uterm_avail: $uterm_missing)
-                  uvt: $uvt_enabled ($uvt_avail: $uvt_missing)
                 eloop: $eloop_enabled ($eloop_avail: $eloop_missing)
 
   Miscellaneous Options:
diff --git a/docs/pc/libuvt.pc.in b/docs/pc/libuvt.pc.in
deleted file mode 100644
index e72d50c..0000000
--- a/docs/pc/libuvt.pc.in
+++ /dev/null
@@ -1,11 +0,0 @@
-prefix=@prefix@
-exec_prefix=@exec_prefix@
-libdir=@libdir@
-includedir=@includedir@
-
-Name: uvt
-Description: User-space Virtual Terminal Implementation
-URL: @PACKAGE_URL@
-Version: @PACKAGE_VERSION@
-Libs: -L${libdir} -luvt
-Cflags: -I${includedir}
diff --git a/docs/sym/libuvt.sym b/docs/sym/libuvt.sym
deleted file mode 100644
index 2ecee21..0000000
--- a/docs/sym/libuvt.sym
+++ /dev/null
@@ -1,50 +0,0 @@
-/***
- * UVT - Userspace Virtual Terminals
- *
- * Copyright (c) 2012-2013 David Herrmann <dh.herrmann@googlemail.com>
- *
- * 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.
- ***/
-
-LIBUVT_1 {
-global:
-	uvt_ctx_new;
-	uvt_ctx_ref;
-	uvt_ctx_unref;
-	uvt_ctx_get_fd;
-	uvt_ctx_dispatch;
-	uvt_ctx_get_major;
-	uvt_ctx_new_minor;
-	uvt_ctx_free_minor;
-
-	uvt_cdev_new;
-	uvt_cdev_ref;
-	uvt_cdev_unref;
-	uvt_cdev_register_cb;
-	uvt_cdev_unregister_cb;
-
-	uvt_client_ref;
-	uvt_client_unref;
-	uvt_client_set_vt;
-	uvt_client_kill;
-	uvt_client_is_dead;
-local:
-	*;
-};
diff --git a/src/uvt.h b/src/uvt.h
deleted file mode 100644
index e767005..0000000
--- a/src/uvt.h
+++ /dev/null
@@ -1,274 +0,0 @@
-/*
- * UVT - Userspace Virtual Terminals
- *
- * Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
- *
- * 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.
- */
-
-/*
- * Userspace Virtual Terminals
- * Virtual terminals were historically implemented in the kernel via a
- * character-device. This layer provides a user-space implementation via
- * CUSE/FUSE that can be used to provide the same API from user-space.
- */
-
-#ifndef UVT_H
-#define UVT_H
-
-#include <inttypes.h>
-#include <linux/kd.h>
-#include <linux/vt.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <termio.h>
-#include <termios.h>
-
-/* UVT types */
-
-struct uvt_client;
-struct uvt_cdev;
-struct uvt_ctx;
-
-/* TTYs */
-
-enum uvt_tty_event_type {
-	UVT_TTY_HUP		= 0x01,
-	UVT_TTY_READ		= 0x02,
-	UVT_TTY_WRITE		= 0x04,
-};
-
-struct uvt_tty_event {
-	unsigned int type;
-};
-
-typedef void (*uvt_tty_cb) (void *tty, struct uvt_tty_event *ev, void *data);
-
-struct uvt_tty_ops {
-	void (*ref) (void *data);
-	void (*unref) (void *data);
-	int (*register_cb) (void *data, uvt_tty_cb cb, void *cb_data);
-	void (*unregister_cb) (void *data, uvt_tty_cb cb, void *cb_data);
-
-	int (*read) (void *data, uint8_t *mem, size_t len);
-	int (*write) (void *data, const uint8_t *mem, size_t len);
-	unsigned int (*poll) (void *data);
-};
-
-/* virtual terminals */
-
-enum uvt_vt_event_type {
-	UVT_VT_HUP		= 0x01,
-	UVT_VT_TTY		= 0x02,
-};
-
-struct uvt_vt_event {
-	unsigned int type;
-
-	union {
-		struct uvt_tty_event tty;
-	};
-};
-
-typedef void (*uvt_vt_cb) (void *vt, struct uvt_vt_event *ev, void *data);
-
-struct uvt_vt_ops {
-	void (*ref) (void *data);
-	void (*unref) (void *data);
-	int (*register_cb) (void *data, uvt_vt_cb cb, void *cb_data);
-	void (*unregister_cb) (void *data, uvt_vt_cb cb, void *cb_data);
-
-	int (*read) (void *data, uint8_t *mem, size_t len);
-	int (*write) (void *data, const uint8_t *mem, size_t len);
-	unsigned int (*poll) (void *data);
-
-	/* TTY ioctls */
-	int (*ioctl_TCFLSH) (void *data, unsigned long arg);
-
-	/* VT ioctls */
-	int (*ioctl_VT_ACTIVATE) (void *data, unsigned long arg);
-	int (*ioctl_VT_WAITACTIVE) (void *data, unsigned long arg);
-	int (*ioctl_VT_GETSTATE) (void *data, struct vt_stat *arg);
-	int (*ioctl_VT_OPENQRY) (void *data, unsigned int *arg);
-	int (*ioctl_VT_GETMODE) (void *data, struct vt_mode *arg);
-	int (*ioctl_VT_SETMODE) (void *data, const struct vt_mode *arg,
-				 pid_t pid);
-	int (*ioctl_VT_RELDISP) (void *data, unsigned long arg);
-	int (*ioctl_KDGETMODE) (void *data, unsigned int *arg);
-	int (*ioctl_KDSETMODE) (void *data, unsigned int arg);
-	int (*ioctl_KDGKBMODE) (void *data, unsigned int *arg);
-	int (*ioctl_KDSKBMODE) (void *data, unsigned int arg);
-
-/*
-   Complete list of all ioctls that the kernel supports. The internal handler
-   returns -EOPNOTSUPP for all of them as they haven't been implemented, yet.
-   We need to check if they are actually required or whether it's not worth the
-   effort.
-   Please implement them only if you know a client that requires them. Also
-   consider implementing them as a no-op if the client doesn't depend on the
-   call to actually do something. We want to keep the actual callbacks at a
-   minimum.
-
-   TTY ioctls
-
-	int (*ioctl_TIOCPKT) (void *data, ...);
-	int (*ioctl_TCXONC) (void *data, ...);
-	int (*ioctl_TCGETS) (void *data, struct termios *arg);
-	int (*ioctl_TCSETS) (void *data, const struct termios *arg);
-	int (*ioctl_TCSETSF) (void *data, const struct termios *arg);
-	int (*ioctl_TCSETSW) (void *data, const struct termios *arg);
-	int (*ioctl_TCGETA) (void *data, ...);
-	int (*ioctl_TCSETA) (void *data, ...);
-	int (*ioctl_TCSETAF) (void *data, ...);
-	int (*ioctl_TCSETAW) (void *data, ...);
-	int (*ioctl_TIOCGLCKTRMIOS) (void *data, ...);
-	int (*ioctl_TIOCSLCKTRMIOS) (void *data, ...);
-	int (*ioctl_TCGETX) (void *data, ...);
-	int (*ioctl_TCSETX) (void *data, ...);
-	int (*ioctl_TCSETXW) (void *data, ...);
-	int (*ioctl_TCSETXF) (void *data, ...);
-	int (*ioctl_TIOCGSOFTCAR) (void *data, ...);
-	int (*ioctl_TIOCSSOFTCAR) (void *data, ...);
-
-   VT ioctls
-
-	int (*ioctl_TIOCLINUX) (void *data, ...);
-	int (*ioctl_KIOCSOUND) (void *data, ...);
-	int (*ioctl_KDMKTONE) (void *data, ...);
-	int (*ioctl_KDGKBTYPE) (void *data, char *arg);
-	int (*ioctl_KDADDIO) (void *data, unsigned long arg);
-	int (*ioctl_KDDELIO) (void *data, unsigned long arg);
-	int (*ioctl_KDENABIO) (void *data);
-	int (*ioctl_KDDISABIO) (void *data);
-	int (*ioctl_KDKBDREP) (void *data, struct kbd_repeat *arg);
-	int (*ioctl_KDMAPDISP) (void *data);
-	int (*ioctl_KDUNMAPDISP) (void *data);
-	int (*ioctl_KDGKBMETA) (void *data, long *arg);
-	int (*ioctl_KDSKBMETA) (void *data, long arg);
-	int (*ioctl_KDGETKEYCODE) (void *data, ...);
-	int (*ioctl_KDSETKEYCODE) (void *data, ...);
-	int (*ioctl_KDGKBENT) (void *data, ...);
-	int (*ioctl_KDSKBENT) (void *data, ...);
-	int (*ioctl_KDGKBSENT) (void *data, ...);
-	int (*ioctl_KDSKBSENT) (void *data, ...);
-	int (*ioctl_KDGKBDIACR) (void *data, ...);
-	int (*ioctl_KDSKBDIACR) (void *data, ...);
-	int (*ioctl_KDGKBDIACRUC) (void *data, ...);
-	int (*ioctl_KDSKBDIACRUC) (void *data, ...);
-	int (*ioctl_KDGETLED) (void *data, char *arg);
-	int (*ioctl_KDSETLED) (void *data, long arg);
-	int (*ioctl_KDGKBLED) (void *data, char *arg);
-	int (*ioctl_KDSKBLED) (void *data, long arg);
-	int (*ioctl_KDSIGACCEPT) (void *data, ...);
-	int (*ioctl_VT_SETACTIVATE) (void *data, ...);
-	int (*ioctl_VT_DISALLOCATE) (void *data, ...);
-	int (*ioctl_VT_RESIZE) (void *data, ...);
-	int (*ioctl_VT_RESIZEX) (void *data, ...);
-	int (*ioctl_GIO_FONT) (void *data, ...);
-	int (*ioctl_PIO_FONT) (void *data, ...);
-	int (*ioctl_GIO_CMAP) (void *data, ...);
-	int (*ioctl_PIO_CMAP) (void *data, ...);
-	int (*ioctl_GIO_FONTX) (void *data, ...);
-	int (*ioctl_PIO_FONTX) (void *data, ...);
-	int (*ioctl_PIO_FONTRESET) (void *data, ...);
-	int (*ioctl_KDFONTOP) (void *data, ...);
-	int (*ioctl_GIO_SCRNMAP) (void *data, ...);
-	int (*ioctl_PIO_SCRNMAP) (void *data, ...);
-	int (*ioctl_GIO_UNISCRNMAP) (void *data, ...);
-	int (*ioctl_PIO_UNISCRNMAP) (void *data, ...);
-	int (*ioctl_PIO_UNIMAPCLR) (void *data, ...);
-	int (*ioctl_GIO_UNIMAP) (void *data, ...);
-	int (*ioctl_PIO_UNIMAP) (void *data, ...);
-	int (*ioctl_VT_LOCKSWITCH) (void *data);
-	int (*ioctl_VT_UNLOCKSWITCH) (void *data);
-	int (*ioctl_VT_GETHIFONTMASK) (void *data, ...);
-	int (*ioctl_VT_WAITEVENT) (void *data, ...);
-*/
-};
-
-/* client sessions */
-
-void uvt_client_ref(struct uvt_client *client);
-void uvt_client_unref(struct uvt_client *client);
-
-int uvt_client_set_vt(struct uvt_client *client, const struct uvt_vt_ops *vt,
-		      void *vt_data);
-void uvt_client_kill(struct uvt_client *client);
-bool uvt_client_is_dead(struct uvt_client *client);
-
-/* character devices */
-
-enum uvt_cdev_event_type {
-	UVT_CDEV_HUP,
-	UVT_CDEV_OPEN,
-};
-
-struct uvt_cdev_event {
-	unsigned int type;
-
-	union {
-		struct uvt_client *client;
-	};
-};
-
-typedef void (*uvt_cdev_cb) (struct uvt_cdev *cdev,
-			     struct uvt_cdev_event *ev,
-			     void *data);
-
-int uvt_cdev_new(struct uvt_cdev **out, struct uvt_ctx *ctx,
-		 const char *name, unsigned int major, unsigned int minor);
-void uvt_cdev_ref(struct uvt_cdev *cdev);
-void uvt_cdev_unref(struct uvt_cdev *cdev);
-
-int uvt_cdev_register_cb(struct uvt_cdev *cdev, uvt_cdev_cb cb, void *data);
-void uvt_cdev_unregister_cb(struct uvt_cdev *cdev, uvt_cdev_cb cb, void *data);
-
-/* contexts */
-
-typedef void (*uvt_log_t) (void *data,
-			   const char *file,
-			   int line,
-			   const char *func,
-			   const char *subs,
-			   unsigned int sev,
-			   const char *format,
-			   va_list args);
-
-int uvt_ctx_new(struct uvt_ctx **out, uvt_log_t log, void *log_data);
-void uvt_ctx_ref(struct uvt_ctx *ctx);
-void uvt_ctx_unref(struct uvt_ctx *ctx);
-
-int uvt_ctx_get_fd(struct uvt_ctx *ctx);
-void uvt_ctx_dispatch(struct uvt_ctx *ctx);
-
-unsigned int uvt_ctx_get_major(struct uvt_ctx *ctx);
-int uvt_ctx_new_minor(struct uvt_ctx *ctx, unsigned int *out);
-void uvt_ctx_free_minor(struct uvt_ctx *ctx, unsigned int minor);
-
-/* pty tty implementation */
-
-struct uvt_tty_null;
-extern const struct uvt_tty_ops uvt_tty_null_ops;
-
-int uvt_tty_null_new(struct uvt_tty_null **out, struct uvt_ctx *ctx);
-void uvt_tty_null_ref(struct uvt_tty_null *tty);
-void uvt_tty_null_unref(struct uvt_tty_null *tty);
-
-#endif /* UVT_H */
diff --git a/src/uvt_cdev.c b/src/uvt_cdev.c
deleted file mode 100644
index 291857b..0000000
--- a/src/uvt_cdev.c
+++ /dev/null
@@ -1,485 +0,0 @@
-/*
- * UVT - Userspace Virtual Terminals
- *
- * Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
- *
- * 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.
- */
-
-/*
- * Character Devices
- * This implements a VT character device entry point via the CUSE API. It does
- * not implement the VT API on top of the character-device (cdev) but only
- * provides the entry point. It is up to the user to bind open-files to VT and
- * client objects.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <linux/major.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include "shl_dlist.h"
-#include "shl_hook.h"
-#include "shl_llog.h"
-#include "uvt.h"
-#include "uvt_internal.h"
-
-#include <fuse/fuse.h>
-#include <fuse/fuse_common.h>
-#include <fuse/fuse_lowlevel.h>
-#include <fuse/fuse_opt.h>
-#include <fuse/cuse_lowlevel.h>
-
-#define LLOG_SUBSYSTEM "uvt_cdev"
-
-/*
- * FUSE low-level ops
- * This implements all the file-system operations on the character-device. It
- * is important that we handle interrupts correctly (ENOENT) and never loose
- * any data. This is all single threaded as it is not performance critical at
- * all.
- * We simply dispatch each call to uvt_client as this implements all the
- * client-session related operations.
- */
-
-static void ll_open(fuse_req_t req, struct fuse_file_info *fi)
-{
-	struct uvt_cdev *cdev = fuse_req_userdata(req);
-	struct uvt_client *client;
-	struct uvt_cdev_event ev;
-	int ret;
-
-	ret = uvt_client_ll_open(&client, cdev, req, fi);
-	if (ret)
-		return;
-
-	memset(&ev, 0, sizeof(ev));
-	ev.type = UVT_CDEV_OPEN;
-	ev.client = client;
-	shl_hook_call(cdev->hook, cdev, &ev);
-}
-
-static void ll_destroy(void *data) {
-	struct uvt_cdev *cdev = data;
-	struct uvt_client *client;
-
-	/* on unexpected shutdown this kills all open clients */
-	while (!shl_dlist_empty(&cdev->clients)) {
-		client = shl_dlist_entry(cdev->clients.next,
-					 struct uvt_client, list);
-		uvt_client_kill(client);
-		uvt_client_unref(client);
-	}
-}
-
-static const struct cuse_lowlevel_ops ll_ops = {
-	.init = NULL,
-	.destroy = ll_destroy,
-	.open = ll_open,
-	.release = uvt_client_ll_release,
-	.read = uvt_client_ll_read,
-	.write = uvt_client_ll_write,
-	.poll = uvt_client_ll_poll,
-	.ioctl = uvt_client_ll_ioctl,
-	.flush = NULL,
-	.fsync = NULL,
-};
-
-/*
- * FUSE channel ops
- * The connection to the FUSE kernel module is done via a file-descriptor.
- * Writing to it is synchronous, so the commands that we write are
- * _immediately_ executed and return the result to us. Furthermore, write()
- * is always non-blocking and always succeeds so no reason to watch for
- * EAGAIN. Reading from the FD, on the other hand, may block if there is no
- * data available so we mark it as O_NONBLOCK. The kernel maintains
- * an event-queue that we read from. So there may be pending events that we
- * haven't read but which affect the calls that we write to the kernel. This
- * is important when handling interrupts.
- * chan_receive() and chan_send() handle I/O to the kernel module and are
- * hooked up into a fuse-channel.
- */
-
-static int chan_receive(struct fuse_chan **chp, char *buf, size_t size)
-{
-	struct fuse_chan *ch = *chp;
-	struct uvt_cdev *cdev = fuse_chan_data(ch);
-	struct fuse_session *se = fuse_chan_session(ch);
-	int fd = fuse_chan_fd(ch);
-	ssize_t res;
-
-	if (!se || !cdev)
-		return -EINVAL;
-
-	if (!size)
-		return 0;
-
-restart:
-	if (fuse_session_exited(se))
-		return 0;
-
-	res = read(fd, buf, size);
-	if (!res) {
-		/* EOF on cuse file */
-		llog_error(cdev, "fuse channel shut down on cdev %p", cdev);
-		fuse_session_exit(se);
-		return 0;
-	} else if (res < 0) {
-		/* ENOENT is returned if the operation was interrupted, it's
-		 * safe to restart */
-		if (errno == ENOENT)
-			goto restart;
-
-		/* ENODEV is returned if the FS got unmounted. This shouldn't
-		 * occur for CUSE devices. Anyway, exit if this happens. */
-		if (errno == ENODEV) {
-			llog_error(cdev, "fuse channel unmounted on cdev %p",
-				   cdev);
-			fuse_session_exit(se);
-			return 0;
-		}
-
-		/* EINTR and EAGAIN are simply forwarded to the caller. */
-		if (errno == EINTR || errno == EAGAIN)
-			return -errno;
-
-		cdev->error = -errno;
-		llog_error(cdev, "fuse channel read error on cdev %p (%d): %m",
-			   cdev, errno);
-		fuse_session_exit(se);
-		return cdev->error;
-	}
-
-	return res;
-}
-
-static int chan_send(struct fuse_chan *ch, const struct iovec iov[],
-		     size_t count)
-{
-	struct uvt_cdev *cdev = fuse_chan_data(ch);
-	struct fuse_session *se = fuse_chan_session(ch);
-	int fd = fuse_chan_fd(ch);
-	int ret;
-
-	if (!cdev || !se)
-		return -EINVAL;
-	if (!iov || !count)
-		return 0;
-
-	ret = writev(fd, iov, count);
-	if (ret < 0) {
-		/* ENOENT is returned on interrupts */
-		if (!fuse_session_exited(se) && errno != ENOENT) {
-			cdev->error = -errno;
-			llog_error(cdev, "cannot write to fuse-channel on cdev %p (%d): %m",
-				   cdev, errno);
-			fuse_session_exit(se);
-		}
-		return cdev->error;
-	}
-
-	return 0;
-}
-
-static const struct fuse_chan_ops chan_ops = {
-	.receive = chan_receive,
-	.send = chan_send,
-	.destroy = NULL,
-};
-
-/*
- * Character Device
- * This creates the high-level character-device driver and registers a
- * fake-session that is used to control each character file.
- * channel_event() is a callback when I/O is possible on the FUSE FD and
- * performs all outstanding tasks.
- * On error, the fake-session is unregistered and deleted. This also stops all
- * client sessions, obviously.
- */
-
-static void uvt_cdev_hup(struct uvt_cdev *cdev, int error)
-{
-	struct uvt_cdev_event ev;
-
-	ev_eloop_rm_fd(cdev->efd);
-	cdev->efd = NULL;
-	cdev->error = error;
-
-	memset(&ev, 0, sizeof(ev));
-	ev.type = UVT_CDEV_HUP;
-
-	shl_hook_call(cdev->hook, cdev, &ev);
-}
-
-static void channel_event(struct ev_fd *fd, int mask, void *data)
-{
-	struct uvt_cdev *cdev = data;
-	int ret;
-	struct fuse_buf buf;
-	struct fuse_chan *ch;
-	struct shl_dlist *iter;
-	struct uvt_client *client;
-
-	if (!(mask & EV_READABLE)) {
-		if (mask & (EV_HUP | EV_ERR)) {
-			llog_error(cdev, "HUP/ERR on fuse channel on cdev %p",
-				   cdev);
-			uvt_cdev_hup(cdev, -EPIPE);
-		}
-
-		return;
-	}
-
-	memset(&buf, 0, sizeof(buf));
-	buf.mem = cdev->buf;
-	buf.size = cdev->bufsize;
-	ch = cdev->channel;
-	ret = fuse_session_receive_buf(cdev->session, &buf, &ch);
-	if (ret == -EINTR || ret == -EAGAIN) {
-		return;
-	} else if (ret < 0) {
-		llog_error(cdev, "fuse channel read error on cdev %p: %d",
-			   cdev, ret);
-		uvt_cdev_hup(cdev, ret);
-		return;
-	}
-
-	fuse_session_process_buf(cdev->session, &buf, ch);
-	if (fuse_session_exited(cdev->session)) {
-		llog_error(cdev, "fuse session exited on cdev %p", cdev);
-		uvt_cdev_hup(cdev, cdev->error ? : -EFAULT);
-		return;
-	}
-
-	/* Readers can get interrupted asynchronously. Due to heavy locking
-	 * inside of FUSE, we cannot release them right away. So cleanup all
-	 * killed readers after we processed all buffers. */
-	shl_dlist_for_each(iter, &cdev->clients) {
-		client = shl_dlist_entry(iter, struct uvt_client, list);
-		uvt_client_cleanup(client);
-	}
-}
-
-static int uvt_cdev_init(struct uvt_cdev *cdev, const char *name,
-			 unsigned int major, unsigned int minor)
-{
-	const char *dev_info_argv[1];
-	struct cuse_info ci;
-	size_t bufsize;
-	char *nparam;
-	int ret;
-
-	/* TODO: libfuse makes sure that fd 0, 1 and 2 are available as
-	 * standard streams, otherwise they fail. This is awkward and we
-	 * should check whether this is really needed and _why_?
-	 * If it is needed, fix upstream to stop that crazy! */
-
-	if (!major)
-		major = TTY_MAJOR;
-
-	if (!major || major > 255) {
-		llog_error(cdev, "invalid major %u on cdev %p",
-			   major, cdev);
-		return -EINVAL;
-	}
-	if (!minor) {
-		llog_error(cdev, "invalid minor %u on cdev %p",
-			   minor, cdev);
-		return -EINVAL;
-	}
-	if (!name || !*name) {
-		llog_error(cdev, "empty name on cdev %p",
-			   cdev);
-		return -EINVAL;
-	}
-
-	llog_info(cdev, "creating device /dev/%s %u:%u on cdev %p",
-		  name, major, minor, cdev);
-
-	ret = asprintf(&nparam, "DEVNAME=%s", name);
-	if (ret <= 0)
-		return llog_ENOMEM(cdev);
-
-	dev_info_argv[0] = nparam;
-	memset(&ci, 0, sizeof(ci));
-	ci.dev_major = major;
-	ci.dev_minor = minor;
-	ci.dev_info_argc = 1;
-	ci.dev_info_argv = dev_info_argv;
-	ci.flags = CUSE_UNRESTRICTED_IOCTL;
-
-	cdev->session = cuse_lowlevel_new(NULL, &ci, &ll_ops, cdev);
-	free(nparam);
-
-	if (!cdev->session) {
-		llog_error(cdev, "cannot create fuse-ll session on cdev %p",
-			   cdev);
-		return -ENOMEM;
-	}
-
-	cdev->fd = open(cdev->ctx->cuse_file, O_RDWR | O_CLOEXEC | O_NONBLOCK);
-	if (cdev->fd < 0) {
-		llog_error(cdev, "cannot open cuse-file %s on cdev %p (%d): %m",
-			   cdev->ctx->cuse_file, cdev, errno);
-		ret = -EFAULT;
-		goto err_session;
-	}
-
-	bufsize = getpagesize() + 0x1000;
-	if (bufsize < 0x21000)
-		bufsize = 0x21000;
-
-	cdev->bufsize = bufsize;
-	cdev->buf = malloc(bufsize);
-	if (!cdev->buf) {
-		ret = llog_ENOMEM(cdev);
-		goto err_fd;
-	}
-
-	/* Argh! libfuse does not use "const" for the "chan_ops" pointer so we
-	 * actually have to cast it. Their implementation does not write into it
-	 * so we can safely use a constant storage for it.
-	 * TODO: Fix libfuse upstream! */
-	cdev->channel = fuse_chan_new((void*)&chan_ops, cdev->fd, bufsize,
-				      cdev);
-	if (!cdev->channel) {
-		llog_error(cdev, "cannot allocate fuse-channel on cdev %p",
-			   cdev);
-		ret = -ENOMEM;
-		goto err_buf;
-	}
-
-	ret = ev_eloop_new_fd(cdev->ctx->eloop, &cdev->efd, cdev->fd,
-			      EV_READABLE, channel_event, cdev);
-	if (ret)
-		goto err_chan;
-
-	fuse_session_add_chan(cdev->session, cdev->channel);
-	return 0;
-
-err_chan:
-	fuse_chan_destroy(cdev->channel);
-err_buf:
-	free(cdev->buf);
-err_fd:
-	close(cdev->fd);
-err_session:
-	fuse_session_destroy(cdev->session);
-	return ret;
-}
-
-static void uvt_cdev_destroy(struct uvt_cdev *cdev)
-{
-	if (cdev->error)
-		llog_warning(cdev, "cdev %p failed with error %d",
-			     cdev, cdev->error);
-
-	fuse_session_destroy(cdev->session);
-	ev_eloop_rm_fd(cdev->efd);
-	free(cdev->buf);
-	close(cdev->fd);
-}
-
-SHL_EXPORT
-int uvt_cdev_new(struct uvt_cdev **out, struct uvt_ctx *ctx,
-		 const char *name, unsigned int major, unsigned int minor)
-{
-	struct uvt_cdev *cdev;
-	int ret;
-
-	if (!ctx)
-		return -EINVAL;
-	if (!out)
-		return llog_EINVAL(ctx);
-
-	cdev = malloc(sizeof(*cdev));
-	if (!cdev)
-		return llog_ENOMEM(ctx);
-	memset(cdev, 0, sizeof(*cdev));
-	cdev->ref = 1;
-	cdev->ctx = ctx;
-	cdev->llog = ctx->llog;
-	cdev->llog_data = ctx->llog_data;
-	shl_dlist_init(&cdev->clients);
-
-	llog_debug(cdev, "new cdev %p on ctx %p", cdev, cdev->ctx);
-
-	ret = shl_hook_new(&cdev->hook);
-	if (ret)
-		goto err_free;
-
-	ret = uvt_cdev_init(cdev, name, major, minor);
-	if (ret)
-		goto err_hook;
-
-	uvt_ctx_ref(cdev->ctx);
-	*out = cdev;
-	return 0;
-
-err_hook:
-	shl_hook_free(cdev->hook);
-err_free:
-	free(cdev);
-	return ret;
-}
-
-SHL_EXPORT
-void uvt_cdev_ref(struct uvt_cdev *cdev)
-{
-	if (!cdev || !cdev->ref)
-		return;
-
-	++cdev->ref;
-}
-
-SHL_EXPORT
-void uvt_cdev_unref(struct uvt_cdev *cdev)
-{
-	if (!cdev || !cdev->ref || --cdev->ref)
-		return;
-
-	llog_debug(cdev, "free cdev %p", cdev);
-
-	uvt_cdev_destroy(cdev);
-	shl_hook_free(cdev->hook);
-	uvt_ctx_unref(cdev->ctx);
-	free(cdev);
-}
-
-SHL_EXPORT
-int uvt_cdev_register_cb(struct uvt_cdev *cdev, uvt_cdev_cb cb, void *data)
-{
-	if (!cdev)
-		return -EINVAL;
-
-	return shl_hook_add_cast(cdev->hook, cb, data, false);
-}
-
-SHL_EXPORT
-void uvt_cdev_unregister_cb(struct uvt_cdev *cdev, uvt_cdev_cb cb, void *data)
-{
-	if (!cdev)
-		return;
-
-	shl_hook_rm_cast(cdev->hook, cb, data);
-}
diff --git a/src/uvt_client.c b/src/uvt_client.c
deleted file mode 100644
index 574001e..0000000
--- a/src/uvt_client.c
+++ /dev/null
@@ -1,1120 +0,0 @@
-/*
- * UVT - Userspace Virtual Terminals
- *
- * Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
- *
- * 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.
- */
-
-/*
- * Client Sessions
- * A client session represents the internal object that corresponds to a single
- * open-file in the kernel. That is, for each user calling open() on a cdev, we
- * create a client-session in UVT.
- * Note that multiple client-sessions can share the same VT object. It is up to
- * the API user to assign clients to the correct VTs. You can even move clients
- * from one VT to another.
- * On the other hand, user-space can have multiple FDs open for a single
- * client-session similar to how they can have multiple FDs for a single
- * open-file.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <linux/kd.h>
-#include <linux/vt.h>
-#include <signal.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/epoll.h>
-#include <termio.h>
-#include <termios.h>
-#include <unistd.h>
-#include "shl_dlist.h"
-#include "shl_llog.h"
-#include "shl_misc.h"
-#include "uvt.h"
-#include "uvt_internal.h"
-
-#define LLOG_SUBSYSTEM "uvt_client"
-
-/*
- * Blocking Waiters
- * I/O has always two modes: blocking and nonblocking
- * Nonblocking I/O is easy. We simply check whether we can actually forward the
- * data. If we can't, we signal that back. However, blocking I/O is a lot more
- * complex to implement. If a user submits a blocking I/O call, we have to wait
- * until we can finish that request. In the kernel we simply put the user
- * context asleep until we call can finish. However, in user-space via FUSE we
- * have no user-context. Instead, we need to work around that.
- * The most straightforward way would be to create a thread and put that thread
- * asleep. However, this would create one thread for every blocking I/O call
- * which seems to be way too much overhead. Also, we don't want threads in a
- * library. Therefore, we use a different approach.
- * For each blocking request, we create a uvt_waiter. This waiter is then linked
- * into the waiter list and we continue with other requests. Everytime the I/O
- * status changes, we retry the whole waiter list and try to finish the
- * requests. If a request is done, we signal it back and destroy the waiter.
- * This gets slightly more complex with interrupts and fuse_req objects. See
- * below for the implementation.
- */
-
-enum uvt_waiter_type {
-	UVT_WAITER_INVALID		= 0x00,
-
-	UVT_WAITER_READ			= 0x01,
-	UVT_WAITER_WRITE		= 0x02,
-
-	UVT_WAITER_ALL			= UVT_WAITER_READ |
-					  UVT_WAITER_WRITE,
-};
-
-enum uvt_waiter_flags {
-	UVT_WAITER_KILLED		= 0x01,
-	UVT_WAITER_RELEASED		= 0x02,
-};
-
-struct uvt_waiter {
-	struct shl_dlist list;
-	struct uvt_client *client;
-	unsigned int flags;
-	fuse_req_t req;
-
-	unsigned int type;
-
-	union {
-		struct {
-			size_t size;
-			uint8_t *buf;
-		} read;
-
-		struct {
-			size_t size;
-			uint8_t *buf;
-		} write;
-	};
-};
-
-static bool uvt_waiter_is_killed(struct uvt_waiter *waiter)
-{
-	return !waiter || (waiter->flags & UVT_WAITER_KILLED);
-}
-
-static void uvt_waiter_set_killed(struct uvt_waiter *waiter)
-{
-	if (waiter)
-		waiter->flags |= UVT_WAITER_KILLED;
-}
-
-static bool uvt_waiter_is_released(struct uvt_waiter *waiter)
-{
-	return !waiter || (waiter->flags & UVT_WAITER_RELEASED);
-}
-
-static void uvt_waiter_set_released(struct uvt_waiter *waiter)
-{
-	if (waiter)
-		waiter->flags |= UVT_WAITER_RELEASED;
-}
-
-static void uvt_waiter_interrupt(fuse_req_t req, void *data)
-{
-	struct uvt_waiter *waiter = data;
-
-	uvt_waiter_set_killed(waiter);
-}
-
-static int uvt_waiter_new(struct uvt_waiter **out, struct uvt_client *client,
-			  fuse_req_t req)
-{
-	struct uvt_waiter *waiter;
-
-	if (!client->vt)
-		return -EPIPE;
-	if (fuse_req_interrupted(req))
-		return -ENOENT;
-
-	waiter = malloc(sizeof(*waiter));
-	if (!waiter)
-		return -ENOMEM;
-	memset(waiter, 0, sizeof(*waiter));
-	waiter->client = client;
-	waiter->flags = 0;
-	waiter->req = req;
-
-	fuse_req_interrupt_func(req, uvt_waiter_interrupt, waiter);
-	if (uvt_waiter_is_killed(waiter)) {
-		fuse_req_interrupt_func(req, NULL, NULL);
-		free(waiter);
-		return -ENOENT;
-	}
-
-	shl_dlist_link_tail(&client->waiters, &waiter->list);
-	*out = waiter;
-	return 0;
-}
-
-static int uvt_waiter_new_read(struct uvt_waiter **out,
-			       struct uvt_client *client, fuse_req_t req,
-			       uint8_t *buf, size_t size)
-{
-	struct uvt_waiter *waiter;
-	int ret;
-
-	if (!size)
-		return -EINVAL;
-
-	ret = uvt_waiter_new(&waiter, client, req);
-	if (ret)
-		return ret;
-	waiter->type = UVT_WAITER_READ;
-	waiter->read.size = size;
-	waiter->read.buf = buf;
-
-	*out = waiter;
-	return 0;
-}
-
-static int uvt_waiter_new_write(struct uvt_waiter **out,
-				struct uvt_client *client, fuse_req_t req,
-				const uint8_t *mem, size_t size)
-{
-	struct uvt_waiter *waiter;
-	uint8_t *buf;
-	int ret;
-
-	if (!size)
-		return -EINVAL;
-
-	buf = malloc(size);
-	if (!buf)
-		return -ENOMEM;
-	memcpy(buf, mem, size);
-
-	ret = uvt_waiter_new(&waiter, client, req);
-	if (ret)
-		goto err_free;
-	waiter->type = UVT_WAITER_WRITE;
-	waiter->write.size = size;
-	waiter->write.buf = buf;
-
-	*out = waiter;
-	return 0;
-
-err_free:
-	free(buf);
-	return ret;
-}
-
-static void uvt_waiter_release(struct uvt_waiter *waiter, int error)
-{
-	if (!waiter || uvt_waiter_is_released(waiter))
-		return;
-
-	uvt_waiter_set_released(waiter);
-	fuse_req_interrupt_func(waiter->req, NULL, NULL);
-	if (error)
-		fuse_reply_err(waiter->req, abs(error));
-}
-
-static void uvt_waiter_free(struct uvt_waiter *waiter, int error)
-{
-	shl_dlist_unlink(&waiter->list);
-	uvt_waiter_release(waiter, error);
-
-	switch (waiter->type) {
-	case UVT_WAITER_READ:
-		free(waiter->read.buf);
-		break;
-	case UVT_WAITER_WRITE:
-		free(waiter->write.buf);
-		break;
-	}
-
-	free(waiter);
-}
-
-static void uvt_waiter_free_read(struct uvt_waiter *waiter, size_t len)
-{
-	if (!waiter)
-		return;
-
-	if (!uvt_waiter_is_released(waiter)) {
-		uvt_waiter_release(waiter, 0);
-		fuse_reply_buf(waiter->req, (void*)waiter->read.buf, len);
-	}
-	uvt_waiter_free(waiter, -EINVAL);
-}
-
-static void uvt_waiter_free_write(struct uvt_waiter *waiter, size_t len)
-{
-	if (!waiter)
-		return;
-
-	if (!uvt_waiter_is_released(waiter)) {
-		uvt_waiter_release(waiter, 0);
-		fuse_reply_write(waiter->req, len);
-	}
-	uvt_waiter_free(waiter, -EINVAL);
-}
-
-/*
- * Client Sessions
- * A client session is the user-space counterpart of kernel-space open-files.
- * For each open-file we have one client-session in user-space. Users can access
- * a single client-session via multiple file-descriptors via dup(). However, for
- * each open() call on the device, we create a new open-file, that is, a new
- * client-session.
- * A single client session dispatches all the I/O calls on the file. It does
- * blocking and nonblocking I/O, parses ioctls() and correctly performs any
- * other state-tracking. But it does not implement any device logic. That means,
- * the client-session doesn't provide any functionality. Instead, you have to
- * assign a VT to the session. The client-session performs any maintenance tasks
- * and then forwards the requests to the VT object. If no VT object is assigned,
- * the user gets ENODEV as error.
- * Because the client-session performs all state-tracking and parsing, the VT
- * object can be a lot simpler and doesn't have to be aware of any FUSE objects
- * or sessions. Instead, the VT object can concentrate on implementing a _VT_
- * and nothing more.
- * Furthermore, this allows to assign the same VT object to multiple different
- * sessions at the same time. Or to assign a different VT to each session on the
- * same device, or any other combination you want.
- */
-
-static void uvt_client_waiters_retry(struct uvt_client *client,
-				     unsigned int types);
-
-static int uvt_client_new(struct uvt_client **out, struct uvt_cdev *cdev)
-{
-	struct uvt_client *client;
-
-	if (!cdev)
-		return -EINVAL;
-	if (!out)
-		return llog_EINVAL(cdev);
-
-	client = malloc(sizeof(*client));
-	if (!client)
-		return llog_ENOMEM(cdev);
-	memset(client, 0, sizeof(*client));
-	client->ref = 1;
-	client->cdev = cdev;
-	client->llog = cdev->llog;
-	client->llog_data = cdev->llog_data;
-	shl_dlist_init(&client->waiters);
-
-	llog_debug(client, "new client %p on cdev %p", client, cdev);
-
-	shl_dlist_link_tail(&cdev->clients, &client->list);
-	*out = client;
-	return 0;
-}
-
-SHL_EXPORT
-void uvt_client_ref(struct uvt_client *client)
-{
-	if (!client || !client->ref)
-		return;
-
-	++client->ref;
-}
-
-SHL_EXPORT
-void uvt_client_unref(struct uvt_client *client)
-{
-	if (!client || !client->ref || --client->ref)
-		return;
-
-	llog_debug(client, "free client %p", client);
-
-	uvt_client_kill(client);
-	free(client);
-}
-
-/*
- * This must be called after each event dispatch round. It cleans up all
- * interrupted/killed readers. The readers cannot be released right away due
- * to heavy locking inside of FUSE. We have to delay these tasks and clean up
- * after each dispatch round.
- */
-void uvt_client_cleanup(struct uvt_client *client)
-{
-	struct shl_dlist *i, *tmp;
-	struct uvt_waiter *waiter;
-
-	if (!client)
-		return;
-
-	shl_dlist_for_each_safe(i, tmp, &client->waiters) {
-		waiter = shl_dlist_entry(i, struct uvt_waiter, list);
-		if (uvt_waiter_is_killed(waiter))
-			uvt_waiter_free(waiter, -ENOENT);
-	}
-}
-
-static void uvt_client_waiters_release(struct uvt_client *client, int error)
-{
-	struct uvt_waiter *waiter;
-	int err;
-
-	if (!client)
-		return;
-
-	while (!shl_dlist_empty(&client->waiters)) {
-		waiter = shl_dlist_entry(client->waiters.next,
-					 struct uvt_waiter, list);
-
-		if (uvt_waiter_is_killed(waiter))
-			err = -ENOENT;
-		else
-			err = error;
-
-		uvt_waiter_free(waiter, err);
-	}
-}
-
-SHL_EXPORT
-bool uvt_client_is_dead(struct uvt_client *client)
-{
-	return !client || !client->cdev;
-}
-
-SHL_EXPORT
-void uvt_client_kill(struct uvt_client *client)
-{
-	if (!client || !client->cdev)
-		return;
-
-	llog_debug(client, "kill client %p", client);
-
-	if (client->ph) {
-		fuse_notify_poll(client->ph);
-		fuse_pollhandle_destroy(client->ph);
-		client->ph = NULL;
-	}
-
-	shl_dlist_unlink(&client->list);
-	client->cdev = NULL;
-	uvt_client_set_vt(client, NULL, NULL);
-	uvt_client_waiters_release(client, -EPIPE);
-}
-
-/*
- * We allow recursive VT-actions so we need sophisticated locking. That is, we
- * allow each client->vt->XY() function to itself raise VT events. These VT
- * events cause our uvt_client_vt_event() handler to call
- * uvt_client_waiters_retry(). But uvt_client_waiters_retry() itself can call
- * VT functions again.
- * This recursion isn't particularly bad, as any _proper_ implementation would
- * have an upper limit (which is the number of active waiters). However, to
- * avoid wasting stack space for recursion, we lock the VT when calling VT
- * callbacks. The uvt_client_vt_event() handler checks whether the callbacks are
- * currently locked and sets markers otherwise. These markers cause our
- * unlock-function to notice that we got events in between and then retries all
- * interrupted operations.
- * The client->vt_in_unlock is used to avoid recursion in unlock() itself.
- */
-
-static bool uvt_client_lock_vt(struct uvt_client *client)
-{
-	if (!client || client->vt_locked)
-		return false;
-
-	client->vt_locked = true;
-	return true;
-}
-
-static void uvt_client_unlock_vt(struct uvt_client *client)
-{
-	unsigned int retry;
-
-	if (!client || !client->vt_locked)
-		return;
-
-	client->vt_locked = false;
-	if (client->vt_in_unlock)
-		return;
-
-	while (client->vt_retry) {
-		retry = client->vt_retry;
-		client->vt_retry = 0;
-
-		client->vt_in_unlock = true;
-		uvt_client_waiters_retry(client, retry);
-		client->vt_in_unlock = false;
-	}
-}
-
-static void uvt_client_waiters_retry(struct uvt_client *client,
-				     unsigned int types)
-{
-	struct shl_dlist *iter, *tmp;
-	struct uvt_waiter *waiter;
-	int ret;
-
-	if (!client || !types || uvt_client_is_dead(client) || !client->vt)
-		return;
-
-	if (!uvt_client_lock_vt(client))
-		return;
-
-	shl_dlist_for_each_safe(iter, tmp, &client->waiters) {
-		if (!types)
-			break;
-
-		waiter = shl_dlist_entry(iter, struct uvt_waiter, list);
-		if (!(waiter->type & types) || uvt_waiter_is_killed(waiter))
-			continue;
-
-		if (waiter->type == UVT_WAITER_READ) {
-			ret = client->vt->read(client->vt_data,
-					       waiter->read.buf,
-					       waiter->read.size);
-			if (ret == -EAGAIN) {
-				types &= ~UVT_WAITER_READ;
-				continue;
-			} else if (ret < 0) {
-				uvt_waiter_free(waiter, ret);
-			} else {
-				if (ret > waiter->read.size)
-					ret = waiter->read.size;
-				uvt_waiter_free_read(waiter, ret);
-			}
-		} else if (waiter->type == UVT_WAITER_WRITE) {
-			ret = client->vt->write(client->vt_data,
-						waiter->write.buf,
-						waiter->write.size);
-			if (ret == -EAGAIN) {
-				types &= ~UVT_WAITER_WRITE;
-				continue;
-			} else if (ret < 0) {
-				uvt_waiter_free(waiter, ret);
-			} else {
-				if (ret > waiter->write.size)
-					ret = waiter->write.size;
-				uvt_waiter_free_write(waiter, ret);
-			}
-		}
-	}
-
-	uvt_client_unlock_vt(client);
-}
-
-static void uvt_client_vt_event(void *vt, struct uvt_vt_event *ev, void *data)
-{
-	struct uvt_client *client = data;
-
-	if (uvt_client_is_dead(client))
-		return;
-
-	switch (ev->type) {
-	case UVT_VT_HUP:
-		uvt_client_kill(client);
-		break;
-	case UVT_VT_TTY:
-		switch (ev->tty.type) {
-		case UVT_TTY_HUP:
-			uvt_client_kill(client);
-			break;
-		case UVT_TTY_READ:
-			if (client->ph)
-				fuse_notify_poll(client->ph);
-			client->vt_retry |= UVT_WAITER_READ;
-			break;
-		case UVT_TTY_WRITE:
-			if (client->ph)
-				fuse_notify_poll(client->ph);
-			client->vt_retry |= UVT_WAITER_WRITE;
-			break;
-		}
-		break;
-	}
-
-	uvt_client_waiters_retry(client, client->vt_retry);
-}
-
-SHL_EXPORT
-int uvt_client_set_vt(struct uvt_client *client, const struct uvt_vt_ops *vt,
-		      void *vt_data)
-{
-	int ret;
-
-	if (!client)
-		return -EINVAL;
-	if (uvt_client_is_dead(client) && vt)
-		return -EINVAL;
-
-	if (client->vt) {
-		client->vt->unregister_cb(client->vt_data, uvt_client_vt_event,
-					  client);
-		client->vt->unref(client->vt_data);
-	}
-
-	client->vt = vt;
-	client->vt_data = vt_data;
-
-	if (client->vt) {
-		ret = client->vt->register_cb(client->vt_data,
-					      uvt_client_vt_event, client);
-		if (!ret) {
-			client->vt->ref(client->vt_data);
-			uvt_client_waiters_retry(client, UVT_WAITER_ALL);
-			return 0;
-		}
-	} else {
-		ret = 0;
-	}
-
-	client->vt = NULL;
-	client->vt_data = NULL;
-	uvt_client_waiters_release(client, -ENODEV);
-	return ret;
-}
-
-/*
- * Internal FUSE low-level fops implementation
- * These functions implement the callbacks used by the CUSE/FUSE-ll
- * implementation in uvt_cdev objects. Our infrastructure allows to provide
- * other callbacks, too, but this is currently not needed. Moreover, I cannot
- * see any reason to add them to the public API as nobody would want anything
- * different than CUSE/FUSE as frontend.
- */
-
-int uvt_client_ll_open(struct uvt_client **out, struct uvt_cdev *cdev,
-		       fuse_req_t req, struct fuse_file_info *fi)
-{
-	struct uvt_client *client;
-	int ret;
-
-	ret = uvt_client_new(&client, cdev);
-	if (ret) {
-		fuse_reply_err(req, -ret);
-		return ret;
-	}
-
-	fi->fh = (uint64_t)(uintptr_t)(void*)client;
-	fi->nonseekable = 1;
-	fi->direct_io = 1;
-	ret = fuse_reply_open(req, fi);
-	if (ret < 0) {
-		uvt_client_kill(client);
-		uvt_client_unref(client);
-		return -EFAULT;
-	}
-
-	*out = client;
-	return 0;
-}
-
-void uvt_client_ll_release(fuse_req_t req, struct fuse_file_info *fi)
-{
-	struct uvt_client *client = (void*)(uintptr_t)fi->fh;
-
-	if (!client) {
-		fuse_reply_err(req, EINVAL);
-		return;
-	}
-
-	uvt_client_kill(client);
-	uvt_client_unref(client);
-	fuse_reply_err(req, 0);
-}
-
-void uvt_client_ll_read(fuse_req_t req, size_t size, off_t off,
-			struct fuse_file_info *fi)
-{
-	struct uvt_client *client = (void*)(uintptr_t)fi->fh;
-	struct uvt_waiter *waiter;
-	uint8_t *buf;
-	int ret;
-
-	if (!client) {
-		fuse_reply_err(req, EINVAL);
-		return;
-	} else if (uvt_client_is_dead(client)) {
-		fuse_reply_err(req, EPIPE);
-		return;
-	} else if (off) {
-		fuse_reply_err(req, EINVAL);
-		return;
-	} else if (!size) {
-		fuse_reply_buf(req, "", 0);
-		return;
-	} else if (!client->vt) {
-		fuse_reply_err(req, ENODEV);
-		return;
-	}
-
-	buf = malloc(size);
-	if (!buf) {
-		fuse_reply_err(req, ENOMEM);
-		return;
-	}
-
-	ret = client->vt->read(client->vt_data, buf, size);
-	if (ret >= 0) {
-		if (ret > size)
-			ret = size;
-
-		fuse_reply_buf(req, (void*)buf, ret);
-		free(buf);
-		return;
-	} else if (ret == -EAGAIN && !(fi->flags & O_NONBLOCK)) {
-		ret = uvt_waiter_new_read(&waiter, client, req, buf, size);
-		if (!ret)
-			return;
-	}
-
-	fuse_reply_err(req, -ret);
-	free(buf);
-}
-
-void uvt_client_ll_write(fuse_req_t req, const char *buf, size_t size,
-			 off_t off, struct fuse_file_info *fi)
-{
-	struct uvt_client *client = (void*)(uintptr_t)fi->fh;
-	struct uvt_waiter *waiter;
-	int ret;
-
-	if (!client) {
-		fuse_reply_err(req, EINVAL);
-		return;
-	} else if (uvt_client_is_dead(client)) {
-		fuse_reply_err(req, EPIPE);
-		return;
-	} else if (off) {
-		fuse_reply_err(req, EINVAL);
-		return;
-	} else if (!size) {
-		fuse_reply_write(req, 0);
-		return;
-	} else if (!client->vt) {
-		fuse_reply_err(req, ENODEV);
-		return;
-	}
-
-	ret = client->vt->write(client->vt_data, (void*)buf, size);
-	if (ret >= 0) {
-		if (ret > size)
-			ret = size;
-
-		fuse_reply_write(req, ret);
-		return;
-	} else if (ret == -EAGAIN && !(fi->flags & O_NONBLOCK)) {
-		ret = uvt_waiter_new_write(&waiter, client, req, (void*)buf,
-					   size);
-		if (!ret)
-			return;
-	}
-
-	fuse_reply_err(req, -ret);
-}
-
-void uvt_client_ll_poll(fuse_req_t req, struct fuse_file_info *fi,
-			struct fuse_pollhandle *ph)
-{
-	struct uvt_client *client = (void*)(uintptr_t)fi->fh;
-	unsigned int flags, fl;
-
-	if (!client) {
-		fuse_reply_err(req, EINVAL);
-		return;
-	} else if (uvt_client_is_dead(client)) {
-		if (ph)
-			fuse_pollhandle_destroy(ph);
-		fuse_reply_poll(req, EPOLLHUP | EPOLLIN | EPOLLOUT |
-				     EPOLLWRNORM | EPOLLRDNORM);
-		return;
-	}
-
-	if (client->ph)
-		fuse_pollhandle_destroy(client->ph);
-	client->ph = ph;
-
-	if (!client->vt) {
-		fuse_reply_err(req, ENODEV);
-		return;
-	}
-
-	flags = 0;
-	fl = client->vt->poll(client->vt_data);
-	if (fl & UVT_TTY_HUP)
-		flags |= EPOLLHUP;
-	if (fl & UVT_TTY_READ)
-		flags |= EPOLLIN | EPOLLRDNORM;
-	if (fl & UVT_TTY_WRITE)
-		flags |= EPOLLOUT | EPOLLWRNORM;
-
-	fuse_reply_poll(req, flags);
-}
-
-static bool ioctl_param(fuse_req_t req, void *arg, size_t in_want,
-			size_t in_have, size_t out_want, size_t out_have)
-{
-	bool retry;
-	struct iovec in, out;
-	size_t in_num, out_num;
-
-	retry = false;
-	memset(&in, 0, sizeof(in));
-	in_num = 0;
-	memset(&out, 0, sizeof(out));
-	out_num = 0;
-
-	if (in_want) {
-		if (!in_have) {
-			retry = true;
-		} else if (in_have < in_want) {
-			fuse_reply_err(req, EFAULT);
-			return true;
-		}
-
-		in.iov_base = arg;
-		in.iov_len = in_want;
-		in_num = 1;
-	}
-	if (out_want) {
-		if (!out_have) {
-			retry = true;
-		} else if (out_have < out_want) {
-			fuse_reply_err(req, EFAULT);
-			return true;
-		}
-
-		out.iov_base = arg;
-		out.iov_len = out_want;
-		out_num = 1;
-	}
-
-	if (retry)
-		fuse_reply_ioctl_retry(req, in_num ? &in : NULL, in_num,
-				       out_num ? &out : NULL, out_num);
-	return retry;
-}
-
-void uvt_client_ll_ioctl(fuse_req_t req, int cmd, void *arg,
-			 struct fuse_file_info *fi, unsigned int flags,
-			 const void *in_buf, size_t in_bufsz, size_t out_bufsz)
-{
-	struct uvt_client *client = (void*)(uintptr_t)fi->fh;
-	uintptr_t uarg = (uintptr_t)arg;
-	bool compat;
-	int ret;
-	struct vt_stat vtstat;
-	struct vt_mode vtmode;
-	unsigned int uval;
-
-	if (!client) {
-		fuse_reply_err(req, EINVAL);
-		return;
-	} else if (uvt_client_is_dead(client)) {
-		fuse_reply_err(req, EPIPE);
-		return;
-	} else if (!client->vt) {
-		fuse_reply_err(req, ENODEV);
-		return;
-	}
-
-	/* TODO: fix compat-ioctls */
-	compat = !!(flags & FUSE_IOCTL_COMPAT);
-	if (compat) {
-		fuse_reply_err(req, EOPNOTSUPP);
-		return;
-	}
-
-	switch (cmd) {
-
-	/* TTY ioctls */
-
-	case TCFLSH:
-		if (ioctl_param(req, arg, 0, in_bufsz, 0, out_bufsz))
-			return;
-		if (!client->vt->ioctl_TCFLSH) {
-			fuse_reply_err(req, EOPNOTSUPP);
-		} else {
-			ret = client->vt->ioctl_TCFLSH(client->vt_data,
-						       (unsigned long)uarg);
-			if (ret)
-				fuse_reply_err(req, abs(ret));
-			else
-				fuse_reply_ioctl(req, 0, NULL, 0);
-		}
-		break;
-
-	case TIOCPKT:
-	case TCXONC:
-	case TCGETS:
-	case TCSETS:
-	case TCSETSF:
-	case TCSETSW:
-	case TCGETA:
-	case TCSETA:
-	case TCSETAF:
-	case TCSETAW:
-	case TIOCGLCKTRMIOS:
-	case TIOCSLCKTRMIOS:
-	case TCGETX:
-	case TCSETX:
-	case TCSETXW:
-	case TCSETXF:
-	case TIOCGSOFTCAR:
-	case TIOCSSOFTCAR:
-		fuse_reply_err(req, EOPNOTSUPP);
-		break;
-
-	/* VT ioctls */
-
-	case VT_ACTIVATE:
-		if (ioctl_param(req, arg, 0, in_bufsz, 0, out_bufsz))
-			return;
-		if (!client->vt->ioctl_VT_ACTIVATE) {
-			fuse_reply_err(req, EOPNOTSUPP);
-		} else {
-			ret = client->vt->ioctl_VT_ACTIVATE(client->vt_data,
-							(unsigned long)uarg);
-			if (ret)
-				fuse_reply_err(req, abs(ret));
-			else
-				fuse_reply_ioctl(req, 0, NULL, 0);
-		}
-		break;
-
-	case VT_WAITACTIVE:
-		if (ioctl_param(req, arg, 0, in_bufsz, 0, out_bufsz))
-			return;
-		if (!client->vt->ioctl_VT_WAITACTIVE) {
-			fuse_reply_err(req, EOPNOTSUPP);
-		} else {
-			ret = client->vt->ioctl_VT_WAITACTIVE(client->vt_data,
-							(unsigned long)uarg);
-			if (ret)
-				fuse_reply_err(req, abs(ret));
-			else
-				fuse_reply_ioctl(req, 0, NULL, 0);
-		}
-		break;
-
-	case VT_GETSTATE:
-		if (ioctl_param(req, arg, 0, in_bufsz,
-				sizeof(struct vt_stat), out_bufsz))
-			return;
-		if (!client->vt->ioctl_VT_GETSTATE) {
-			fuse_reply_err(req, EOPNOTSUPP);
-		} else {
-			memset(&vtstat, 0, sizeof(vtstat));
-			ret = client->vt->ioctl_VT_GETSTATE(client->vt_data,
-							    &vtstat);
-			if (ret)
-				fuse_reply_err(req, abs(ret));
-			else
-				fuse_reply_ioctl(req, 0, &vtstat,
-						 sizeof(vtstat));
-		}
-		break;
-
-	case VT_OPENQRY:
-		if (ioctl_param(req, arg, 0, in_bufsz,
-				sizeof(unsigned int), out_bufsz))
-			return;
-		if (!client->vt->ioctl_VT_OPENQRY) {
-			fuse_reply_err(req, EOPNOTSUPP);
-		} else {
-			uval = 0;
-			ret = client->vt->ioctl_VT_OPENQRY(client->vt_data,
-							   &uval);
-			if (ret)
-				fuse_reply_err(req, abs(ret));
-			else
-				fuse_reply_ioctl(req, 0, &uval, sizeof(uval));
-		}
-		break;
-
-	case VT_GETMODE:
-		if (ioctl_param(req, arg, 0, in_bufsz,
-				sizeof(struct vt_mode), out_bufsz))
-			return;
-		if (!client->vt->ioctl_VT_GETMODE) {
-			fuse_reply_err(req, EOPNOTSUPP);
-		} else {
-			memset(&vtmode, 0, sizeof(vtmode));
-			ret = client->vt->ioctl_VT_GETMODE(client->vt_data,
-							   &vtmode);
-			if (ret)
-				fuse_reply_err(req, abs(ret));
-			else
-				fuse_reply_ioctl(req, 0, &vtmode,
-						 sizeof(vtmode));
-		}
-		break;
-
-	case VT_SETMODE:
-		if (ioctl_param(req, arg, sizeof(struct vt_mode), in_bufsz,
-				0, out_bufsz))
-			return;
-		if (!client->vt->ioctl_VT_SETMODE) {
-			fuse_reply_err(req, EOPNOTSUPP);
-		} else {
-			ret = client->vt->ioctl_VT_SETMODE(client->vt_data,
-						(const struct vt_mode*)in_buf,
-						fuse_req_ctx(req)->pid);
-			if (ret)
-				fuse_reply_err(req, abs(ret));
-			else
-				fuse_reply_ioctl(req, 0, NULL, 0);
-		}
-		break;
-
-	case VT_RELDISP:
-		if (ioctl_param(req, arg, 0, in_bufsz, 0, out_bufsz))
-			return;
-		if (!client->vt->ioctl_VT_RELDISP) {
-			fuse_reply_err(req, EOPNOTSUPP);
-		} else {
-			ret = client->vt->ioctl_VT_RELDISP(client->vt_data,
-							(unsigned long)uarg);
-			if (ret)
-				fuse_reply_err(req, abs(ret));
-			else
-				fuse_reply_ioctl(req, 0, NULL, 0);
-		}
-		break;
-
-	case KDGETMODE:
-		if (ioctl_param(req, arg, 0, in_bufsz,
-				sizeof(unsigned int), out_bufsz))
-			return;
-		if (!client->vt->ioctl_KDGETMODE) {
-			fuse_reply_err(req, EOPNOTSUPP);
-		} else {
-			uval = 0;
-			ret = client->vt->ioctl_KDGETMODE(client->vt_data,
-							  &uval);
-			if (ret)
-				fuse_reply_err(req, abs(ret));
-			else
-				fuse_reply_ioctl(req, 0, &uval, sizeof(uval));
-		}
-		break;
-
-	case KDSETMODE:
-		if (ioctl_param(req, arg, 0, in_bufsz, 0, out_bufsz))
-			return;
-		if (!client->vt->ioctl_KDSETMODE) {
-			fuse_reply_err(req, EOPNOTSUPP);
-		} else {
-			ret = client->vt->ioctl_KDSETMODE(client->vt_data,
-							(unsigned int)uarg);
-			if (ret)
-				fuse_reply_err(req, abs(ret));
-			else
-				fuse_reply_ioctl(req, 0, NULL, 0);
-		}
-		break;
-
-	case KDGKBMODE:
-		if (ioctl_param(req, arg, 0, in_bufsz,
-				sizeof(unsigned int), out_bufsz))
-			return;
-		if (!client->vt->ioctl_KDGKBMODE) {
-			fuse_reply_err(req, EOPNOTSUPP);
-		} else {
-			uval = 0;
-			ret = client->vt->ioctl_KDGKBMODE(client->vt_data,
-							  &uval);
-			if (ret)
-				fuse_reply_err(req, abs(ret));
-			else
-				fuse_reply_ioctl(req, 0, &uval, sizeof(uval));
-		}
-		break;
-
-	case KDSKBMODE:
-		if (ioctl_param(req, arg, 0, in_bufsz, 0, out_bufsz))
-			return;
-		if (!client->vt->ioctl_KDSKBMODE) {
-			fuse_reply_err(req, EOPNOTSUPP);
-		} else {
-			ret = client->vt->ioctl_KDSKBMODE(client->vt_data,
-							(unsigned int)uarg);
-			if (ret)
-				fuse_reply_err(req, abs(ret));
-			else
-				fuse_reply_ioctl(req, 0, NULL, 0);
-		}
-		break;
-
-	case TIOCLINUX:
-	case KIOCSOUND:
-	case KDMKTONE:
-	case KDGKBTYPE:
-	case KDADDIO:
-	case KDDELIO:
-	case KDENABIO:
-	case KDDISABIO:
-	case KDKBDREP:
-	case KDMAPDISP:
-	case KDUNMAPDISP:
-	case KDGKBMETA:
-	case KDSKBMETA:
-	case KDGETKEYCODE:
-	case KDSETKEYCODE:
-	case KDGKBENT:
-	case KDSKBENT:
-	case KDGKBSENT:
-	case KDSKBSENT:
-	case KDGKBDIACR:
-	case KDSKBDIACR:
-	case KDGKBDIACRUC:
-	case KDSKBDIACRUC:
-	case KDGETLED:
-	case KDSETLED:
-	case KDGKBLED:
-	case KDSKBLED:
-	case KDSIGACCEPT:
-	case VT_SETACTIVATE:
-	case VT_DISALLOCATE:
-	case VT_RESIZE:
-	case VT_RESIZEX:
-	case GIO_FONT:
-	case PIO_FONT:
-	case GIO_CMAP:
-	case PIO_CMAP:
-	case GIO_FONTX:
-	case PIO_FONTX:
-	case PIO_FONTRESET:
-	case KDFONTOP:
-	case GIO_SCRNMAP:
-	case PIO_SCRNMAP:
-	case GIO_UNISCRNMAP:
-	case PIO_UNISCRNMAP:
-	case PIO_UNIMAPCLR:
-	case GIO_UNIMAP:
-	case PIO_UNIMAP:
-	case VT_LOCKSWITCH:
-	case VT_UNLOCKSWITCH:
-	case VT_GETHIFONTMASK:
-	case VT_WAITEVENT:
-		fuse_reply_err(req, EOPNOTSUPP);
-		break;
-	default:
-		fuse_reply_err(req, EINVAL);
-		break;
-	}
-}
diff --git a/src/uvt_ctx.c b/src/uvt_ctx.c
deleted file mode 100644
index ad1e534..0000000
--- a/src/uvt_ctx.c
+++ /dev/null
@@ -1,168 +0,0 @@
-/*
- * UVT - Userspace Virtual Terminals
- *
- * Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
- *
- * 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.
- */
-
-/*
- * UVT Contexts
- * A UVT context is used to provide basic infrastructure for all other UVT
- * objects. It allows easy integration of multiple UVT objects into a single
- * application.
- */
-
-#include <eloop.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <linux/major.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include "shl_array.h"
-#include "shl_flagset.h"
-#include "shl_llog.h"
-#include "shl_misc.h"
-#include "uvt.h"
-#include "uvt_internal.h"
-
-#define LLOG_SUBSYSTEM "uvt_ctx"
-
-SHL_EXPORT
-int uvt_ctx_new(struct uvt_ctx **out, uvt_log_t log, void *log_data)
-{
-	struct uvt_ctx *ctx;
-	int ret;
-
-	if (!out)
-		return llog_dEINVAL(log, log_data);
-
-	ctx = malloc(sizeof(*ctx));
-	if (!ctx)
-		return llog_dENOMEM(log, log_data);
-	memset(ctx, 0, sizeof(*ctx));
-	ctx->ref = 1;
-	ctx->llog = log;
-	ctx->llog_data = log_data;
-
-	/* Default major/minor uses the TTY_MAJOR number with an offset of 2^15
-	 * to avoid ID-clashes with any in-kernel TTY driver. As kernel drivers
-	 * use static IDs only, a lower number would be fine, too, but lets be
-	 * safe and just use high numbers. */
-	ctx->major = TTY_MAJOR;
-	ctx->minor_offset = 16384;
-
-	llog_debug(ctx, "new ctx %p", ctx);
-
-	ret = ev_eloop_new(&ctx->eloop, ctx->llog, ctx->llog_data);
-	if (ret)
-		goto err_free;
-
-	ctx->cuse_file = strdup("/dev/cuse");
-	if (!ctx->cuse_file) {
-		ret = llog_ENOMEM(ctx);
-		goto err_eloop;
-	}
-
-	ret = shl_flagset_new(&ctx->minors);
-	if (ret)
-		goto err_file;
-
-	*out = ctx;
-	return 0;
-
-err_file:
-	free(ctx->cuse_file);
-err_eloop:
-	ev_eloop_unref(ctx->eloop);
-err_free:
-	free(ctx);
-	return ret;
-}
-
-SHL_EXPORT
-void uvt_ctx_ref(struct uvt_ctx *ctx)
-{
-	if (!ctx || !ctx->ref)
-		return;
-
-	++ctx->ref;
-}
-
-SHL_EXPORT
-void uvt_ctx_unref(struct uvt_ctx *ctx)
-{
-	if (!ctx || !ctx->ref || --ctx->ref)
-		return;
-
-	llog_debug(ctx, "free ctx %p", ctx);
-
-	shl_flagset_free(ctx->minors);
-	free(ctx->cuse_file);
-	ev_eloop_unref(ctx->eloop);
-	free(ctx);
-}
-
-SHL_EXPORT
-int uvt_ctx_get_fd(struct uvt_ctx *ctx)
-{
-	if (!ctx)
-		return -1;
-
-	return ev_eloop_get_fd(ctx->eloop);
-}
-
-SHL_EXPORT
-void uvt_ctx_dispatch(struct uvt_ctx *ctx)
-{
-	if (!ctx)
-		return;
-
-	ev_eloop_dispatch(ctx->eloop, 0);
-}
-
-SHL_EXPORT
-unsigned int uvt_ctx_get_major(struct uvt_ctx *ctx)
-{
-	return ctx->major;
-}
-
-SHL_EXPORT
-int uvt_ctx_new_minor(struct uvt_ctx *ctx, unsigned int *out)
-{
-	int ret;
-
-	ret = shl_flagset_alloc(ctx->minors, out);
-	if (ret)
-		return ret;
-
-	*out += ctx->minor_offset;
-	return 0;
-}
-
-SHL_EXPORT
-void uvt_ctx_free_minor(struct uvt_ctx *ctx, unsigned int minor)
-{
-	if (!ctx || minor < ctx->minor_offset)
-		return;
-
-	shl_flagset_unset(ctx->minors, minor - ctx->minor_offset);
-}
diff --git a/src/uvt_internal.h b/src/uvt_internal.h
deleted file mode 100644
index 479cf2b..0000000
--- a/src/uvt_internal.h
+++ /dev/null
@@ -1,118 +0,0 @@
-/*
- * UVT - Userspace Virtual Terminals
- *
- * Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
- *
- * 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.
- */
-
-/*
- * Userspace Virtual Terminals Internals
- * Internal header of the UVT implementation.
- */
-
-#ifndef UVT_INTERNAL_H
-#define UVT_INTERNAL_H
-
-#include <eloop.h>
-#include <stdlib.h>
-#include <uvt.h>
-#include "shl_array.h"
-#include "shl_dlist.h"
-#include "shl_hook.h"
-#include "shl_llog.h"
-
-#include <fuse/fuse.h>
-#include <fuse/fuse_common.h>
-#include <fuse/fuse_lowlevel.h>
-#include <fuse/fuse_opt.h>
-#include <fuse/cuse_lowlevel.h>
-
-/* contexts */
-
-struct uvt_ctx {
-	unsigned long ref;
-	llog_submit_t llog;
-	void *llog_data;
-	struct ev_eloop *eloop;
-
-	char *cuse_file;
-	unsigned int major;
-	unsigned int minor_offset;
-	struct shl_array *minors;
-};
-
-/* character devices */
-
-struct uvt_cdev {
-	unsigned long ref;
-	struct uvt_ctx *ctx;
-	llog_submit_t llog;
-	void *llog_data;
-
-	int error;
-	struct shl_hook *hook;
-
-	struct fuse_session *session;
-	int fd;
-	struct fuse_chan *channel;
-	struct ev_fd *efd;
-
-	size_t bufsize;
-	char *buf;
-
-	struct shl_dlist clients;
-};
-
-/* client sessions */
-
-struct uvt_client {
-	unsigned long ref;
-	struct shl_dlist list;
-	struct uvt_cdev *cdev;
-	llog_submit_t llog;
-	void *llog_data;
-
-	struct fuse_pollhandle *ph;
-	struct shl_dlist waiters;
-
-	const struct uvt_vt_ops *vt;
-	void *vt_data;
-	bool vt_locked;
-	bool vt_in_unlock;
-	unsigned int vt_retry;
-};
-
-void uvt_client_cleanup(struct uvt_client *client);
-
-int uvt_client_ll_open(struct uvt_client **out, struct uvt_cdev *cdev,
-		       fuse_req_t req, struct fuse_file_info *fi);
-void uvt_client_ll_release(fuse_req_t req, struct fuse_file_info *fi);
-void uvt_client_ll_read(fuse_req_t req, size_t size, off_t off,
-			struct fuse_file_info *fi);
-void uvt_client_ll_write(fuse_req_t req, const char *buf, size_t size,
-			 off_t off, struct fuse_file_info *fi);
-void uvt_client_ll_poll(fuse_req_t req, struct fuse_file_info *fi,
-			struct fuse_pollhandle *ph);
-void uvt_client_ll_ioctl(fuse_req_t req, int cmd, void *arg,
-			 struct fuse_file_info *fi, unsigned int flags,
-			 const void *in_buf, size_t in_bufsz, size_t out_bufsz);
-
-#endif /* UVT_INTERNAL_H */
diff --git a/src/uvt_tty_null.c b/src/uvt_tty_null.c
deleted file mode 100644
index 0c04942..0000000
--- a/src/uvt_tty_null.c
+++ /dev/null
@@ -1,135 +0,0 @@
-/*
- * UVT - Userspace Virtual Terminals
- *
- * Copyright (c) 2011-2013 David Herrmann <dh.herrmann@gmail.com>
- *
- * 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.
- */
-
-/*
- * Null TTY
- * This tty simply discards all incoming messages and never produces any
- * outgoing messages. Ioctls return static data or fail with some generic error
- * code if they would modify internal state that we cannot emulate easily.
- */
-
-#include <eloop.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include "shl_llog.h"
-#include "uvt.h"
-#include "uvt_internal.h"
-
-#define LLOG_SUBSYSTEM "uvt_tty_null"
-
-struct uvt_tty_null {
-	unsigned long ref;
-	struct uvt_ctx *ctx;
-	llog_submit_t llog;
-	void *llog_data;
-};
-
-static void tty_null_ref(void *data)
-{
-	uvt_tty_null_ref(data);
-}
-
-static void tty_null_unref(void *data)
-{
-	uvt_tty_null_unref(data);
-}
-
-static int tty_null_register_cb(void *data, uvt_tty_cb cb, void *cb_data)
-{
-	return 0;
-}
-
-static void tty_null_unregister_cb(void *data, uvt_tty_cb cb, void *cb_data)
-{
-}
-
-static int tty_null_read(void *data, uint8_t *buf, size_t size)
-{
-	return -EAGAIN;
-}
-
-static int tty_null_write(void *data, const uint8_t *buf, size_t size)
-{
-	return size;
-}
-
-static unsigned int tty_null_poll(void *data)
-{
-	return UVT_TTY_WRITE;
-}
-
-const struct uvt_tty_ops uvt_tty_null_ops = {
-	.ref = tty_null_ref,
-	.unref = tty_null_unref,
-	.register_cb = tty_null_register_cb,
-	.unregister_cb = tty_null_unregister_cb,
-
-	.read = tty_null_read,
-	.write = tty_null_write,
-	.poll = tty_null_poll,
-};
-
-int uvt_tty_null_new(struct uvt_tty_null **out, struct uvt_ctx *ctx)
-{
-	struct uvt_tty_null *tty;
-
-	if (!ctx)
-		return -EINVAL;
-	if (!out)
-		return llog_EINVAL(ctx);
-
-	tty = malloc(sizeof(*tty));
-	if (!tty)
-		return llog_ENOMEM(ctx);
-	memset(tty, 0, sizeof(*tty));
-	tty->ref = 1;
-	tty->ctx = ctx;
-	tty->llog = tty->ctx->llog;
-	tty->llog_data = tty->ctx->llog_data;
-
-	uvt_ctx_ref(tty->ctx);
-	*out = tty;
-	return 0;
-}
-
-void uvt_tty_null_ref(struct uvt_tty_null *tty)
-{
-	if (!tty || !tty->ref)
-		return;
-
-	++tty->ref;
-}
-
-void uvt_tty_null_unref(struct uvt_tty_null *tty)
-{
-	if (!tty || !tty->ref || --tty->ref)
-		return;
-
-	uvt_ctx_unref(tty->ctx);
-	free(tty);
-}