~ruther/dwl

3d2e36f70007f299d5c49335661f08c57b3b31e7 — Rutherther 17 days ago a8e46f3 + ab4cb6e v0.8/patched-keycodes
Merge remote-tracking branch 'upstream/main' into HEAD
10 files changed, 520 insertions(+), 339 deletions(-)

A .mailmap
M CHANGELOG.md
M Makefile
M README.md
M client.h
M config.def.h
M config.mk
M dwl.1
M dwl.c
M util.c
A .mailmap => .mailmap +3 -0
@@ 0,0 1,3 @@
Lennart Jablonka <humm@ljabl.com> <hummsmith42@gmail.com>
Leonardo Hernández Hernández <leohdz172@proton.me> <leohdz172@outlook.com>
Leonardo Hernández Hernández <leohdz172@proton.me> <leohdz172@protonmail.com>

M CHANGELOG.md => CHANGELOG.md +23 -0
@@ 1,10 1,33 @@
# Changelog

* [Unreleased](#unreleased)
* [0.7](#0.7)
* [0.6](#0.6)
* [0.5](#0.5)


## Unreleased
### Added

* Support for the linux-drm-syncobj-v1 protocol ([wlroots!4715][wlroots!4715], [#685][685])
* Allow the use of non-system wlroots library ([#646][646])

[wlroots!4715]: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4715
[685]: https://codeberg.org/dwl/dwl/pulls/685
[646]: https://codeberg.org/dwl/dwl/pulls/646


### Changed
### Deprecated
### Removed
### Fixed

* Crash when a client is created while all outputs are disabled.

### Security
### Contributors


## 0.7

This version is just 0.6 with wlroots 0.18 compatibility.

M Makefile => Makefile +5 -4
@@ 6,15 6,15 @@ include config.mk
# flags for compiling
DWLCPPFLAGS = -I. -DWLR_USE_UNSTABLE -D_POSIX_C_SOURCE=200809L \
	-DVERSION=\"$(VERSION)\" $(XWAYLAND)
DWLDEVCFLAGS = -g -pedantic -Wall -Wextra -Wdeclaration-after-statement \
DWLDEVCFLAGS = -g -Wpedantic -Wall -Wextra -Wdeclaration-after-statement \
	-Wno-unused-parameter -Wshadow -Wunused-macros -Werror=strict-prototypes \
	-Werror=implicit -Werror=return-type -Werror=incompatible-pointer-types \
	-Wfloat-conversion

# CFLAGS / LDFLAGS
PKGS      = wlroots-0.18 wayland-server xkbcommon libinput $(XLIBS)
DWLCFLAGS = `$(PKG_CONFIG) --cflags $(PKGS)` $(DWLCPPFLAGS) $(DWLDEVCFLAGS) $(CFLAGS)
LDLIBS    = `$(PKG_CONFIG) --libs $(PKGS)` -lm $(LIBS)
PKGS      = wayland-server xkbcommon libinput $(XLIBS)
DWLCFLAGS = `$(PKG_CONFIG) --cflags $(PKGS)` $(WLR_INCS) $(DWLCPPFLAGS) $(DWLDEVCFLAGS) $(CFLAGS)
LDLIBS    = `$(PKG_CONFIG) --libs $(PKGS)` $(WLR_LIBS) -lm $(LIBS)

all: dwl
dwl: dwl.o util.o dwl-ipc-unstable-v2-protocol.o


@@ 69,6 69,7 @@ dist: clean

install: dwl
	mkdir -p $(DESTDIR)$(PREFIX)/bin
	rm -f $(DESTDIR)$(PREFIX)/bin/dwl
	cp -f dwl $(DESTDIR)$(PREFIX)/bin
	chmod 755 $(DESTDIR)$(PREFIX)/bin/dwl
	mkdir -p $(DESTDIR)$(MANDIR)/man1

M README.md => README.md +113 -92
@@ 1,80 1,54 @@
# dwl - dwm for Wayland

Join us on our IRC channel: [#dwl on Libera Chat]  
Or on our [Discord server].
Or on the community-maintained [Discord server].

dwl is a compact, hackable compositor for [Wayland] based on [wlroots]. It is
intended to fill the same space in the Wayland world that dwm does in X11,
primarily in terms of functionality, and secondarily in terms of philosophy.
Like dwm, dwl is:
primarily in terms of functionality, and secondarily in terms of
philosophy. Like dwm, dwl is:

- Easy to understand, hack on, and extend with patches
- One C source file (or a very small number) configurable via `config.h`
- Tied to as few external dependencies as possible

dwl is not meant to provide every feature under the sun. Instead, like dwm, it
sticks to features which are necessary, simple, and straightforward to implement
given the base on which it is built. Implemented default features are:

- Any features provided by dwm/Xlib: simple window borders, tags, keybindings,
  client rules, mouse move/resize. Providing a built-in status bar is an
  exception to this goal, to avoid dependencies on font rendering and/or
  drawing libraries when an external bar could work well.
- Configurable multi-monitor layout support, including position and rotation
- Configurable HiDPI/multi-DPI support
- Idle-inhibit protocol which lets applications such as mpv disable idle
  monitoring
- Provide information to external status bars via stdout/stdin
- Urgency hints via xdg-activate protocol
- Support screen lockers via ext-session-lock-v1 protocol
- Various Wayland protocols
- XWayland support as provided by wlroots (can be enabled in `config.mk`)
- Zero flickering - Wayland users naturally expect that "every frame is perfect"
- Layer shell popups (used by Waybar)
- Damage tracking provided by scenegraph API

Given the Wayland architecture, dwl has to implement features from dwm **and**
the xorg-server. Because of this, it is impossible to maintain the original
project goal of 2000 SLOC and have a reasonably complete compositor with
features comparable to dwm. However, this does not mean that the code will grow
indiscriminately. We will try to keep the code as small as possible.

Features under consideration (possibly as patches) are:

- Protocols made trivial by wlroots
- Implement the text-input and input-method protocols to support IME once ibus
  implements input-method v2 (see https://github.com/ibus/ibus/pull/2256 and
  https://codeberg.org/dwl/dwl/pulls/235)

Feature *non-goals* for the main codebase include:

- Client-side decoration (any more than is necessary to tell the clients not to)
- Client-initiated window management, such as move, resize, and close, which can
  be done through the compositor
- Animations and visual effects

## Building dwl

## Getting Started:

### Latest semi-stable [release]
This is probably where you want to start. This builds against the [wlroots]
versions currently shipping in major distributions. If your
distribution's `wlroots` version is older, use an earlier dwl [release].
The `wlroots` version against which a given `dwl` release builds is specified
with each release on the [release] page

### Development branch [main]
Active development progresses on the `main` branch. The `main` branch is built
against a late (and often changing) git commit of wlroots. While the adventurous
are welcome to use `main`, it is a rocky road. Using `main` requires that the
user be willing to chase git commits of wlroots. Testing development pull
requests may involve merging unmerged pull requests in [wlroots]' git repository
and/or git commits of wayland.
  
### Building dwl
dwl has the following dependencies:
```
libinput
wayland
wlroots (compiled with the libinput backend)
xkbcommon
wayland-protocols (compile-time only)
pkg-config (compile-time only)
```
If you enable X11 support:
```
libxcb
libxcb-wm
wlroots (compiled with X11 support)
Xwayland (runtime only)
```

Simply install these (and their `-devel` versions if your distro has separate
development packages) and run `make`.  If you wish to build against a Git
version of wlroots, check out the [wlroots-next branch].
- libinput
- wayland
- wlroots (compiled with the libinput backend)
- xkbcommon
- wayland-protocols (compile-time only)
- pkg-config (compile-time only)

dwl has the following additional dependencies if XWayland support is enabled:
- libxcb
- libxcb-wm
- wlroots (compiled with X11 support)
- Xwayland (runtime only)

Install these (and their `-devel` versions if your distro has separate
development packages) and run `make`. If you wish to build against a released
version of wlroots (*you probably do*), use a [release] or a [0.x branch]. If
you want to use the unstable development `main` branch, you need to use the git
version of [wlroots].

To enable XWayland, you should uncomment its flags in `config.mk`.



@@ 85,24 59,24 @@ manner as dwm. There is no way to separately restart the window manager in
Wayland without restarting the entire display server, so any changes will take
effect the next time dwl is executed.

As in the dwm community, we encourage users to share patches they have created.
Check out the dwl [patches repository]!
As in the dwm community, we encourage users to share patches they have
created. Check out the [dwl-patches] repository!

## Running dwl

dwl can be run on any of the backends supported by wlroots. This means you can
run it as a separate window inside either an X11 or Wayland session, as well
as directly from a VT console. Depending on your distro's setup, you may need
to add your user to the `video` and `input` groups before you can run dwl on
a VT. If you are using `elogind` or `systemd-logind` you need to install
polkit; otherwise you need to add yourself in the `seat` group and
enable/start the seatd daemon.
run it as a separate window inside either an X11 or Wayland session, as well as
directly from a VT console. Depending on your distro's setup, you may need to
add your user to the `video` and `input` groups before you can run dwl on a
VT. If you are using `elogind` or `systemd-logind` you need to install polkit;
otherwise you need to add yourself in the `seat` group and enable/start the
seatd daemon.

When dwl is run with no arguments, it will launch the server and begin handling
any shortcuts configured in `config.h`. There is no status bar or other
decoration initially; these are instead clients that can be run within
the Wayland session.
Do note that the background color is black.
decoration initially; these are instead clients that can be run within the
Wayland session. Do note that the default background color is grey. This can be
modified in `config.h`.

If you would like to run a script or command automatically at startup, you can
specify the command using the `-s` option. This command will be executed as a


@@ 110,7 84,8 @@ shell command using `/bin/sh -c`.  It serves a similar function to `.xinitrc`,
but differs in that the display server will not shut down when this process
terminates. Instead, dwl will send this process a SIGTERM at shutdown and wait
for it to terminate (if it hasn't already). This makes it ideal for execing into
a user service manager like [s6], [anopa], [runit], [dinit], or [`systemd --user`].
a user service manager like [s6], [anopa], [runit], [dinit], or [`systemd
--user`].

Note: The `-s` command is run as a *child process* of dwl, which means that it
does not have the ability to affect the environment of dwl or of any processes


@@ 128,11 103,11 @@ automatically, you will need to configure it prior to launching `dwl`, e.g.:

Information about selected layouts, current window title, app-id, and
selected/occupied/urgent tags is written to the stdin of the `-s` command (see
the `printstatus()` function for details).  This information can be used to
populate an external status bar with a script that parses the information.
Failing to read this information will cause dwl to block, so if you do want to
run a startup command that does not consume the status information, you can
close standard input with the `<&-` shell redirection, for example:
the `STATUS INFORMATION` section in `_dwl_(1)`).  This information can be used to
populate an external status bar with a script that parses the
information. Failing to read this information will cause dwl to block, so if you
do want to run a startup command that does not consume the status information,
you can close standard input with the `<&-` shell redirection, for example:

    dwl -s 'foot --server <&-'



@@ 147,6 122,49 @@ To get a list of status bars that work with dwl consult our [wiki].

You can find a [list of useful resources on our wiki].

## Background

dwl is not meant to provide every feature under the sun. Instead, like dwm, it
sticks to features which are necessary, simple, and straightforward to implement
given the base on which it is built. Implemented default features are:

- Any features provided by dwm/Xlib: simple window borders, tags, keybindings,
  client rules, mouse move/resize. Providing a built-in status bar is an
  exception to this goal, to avoid dependencies on font rendering and/or drawing
  libraries when an external bar could work well.
- Configurable multi-monitor layout support, including position and rotation
- Configurable HiDPI/multi-DPI support
- Idle-inhibit protocol which lets applications such as mpv disable idle
  monitoring
- Provide information to external status bars via stdout/stdin
- Urgency hints via xdg-activate protocol
- Support screen lockers via ext-session-lock-v1 protocol
- Various Wayland protocols
- XWayland support as provided by wlroots (can be enabled in `config.mk`)
- Zero flickering - Wayland users naturally expect that "every frame is perfect"
- Layer shell popups (used by Waybar)
- Damage tracking provided by scenegraph API

Given the Wayland architecture, dwl has to implement features from dwm **and**
the xorg-server. Because of this, it is impossible to maintain the original
project goal of 2000 SLOC and have a reasonably complete compositor with
features comparable to dwm. However, this does not mean that the code will grow
indiscriminately. We will try to keep the code as small as possible.

Features under consideration (possibly as patches) are:

- Protocols made trivial by wlroots
- Implement the text-input and input-method protocols to support IME once ibus
  implements input-method v2 (see https://github.com/ibus/ibus/pull/2256 and
  https://codeberg.org/dwl/dwl/pulls/235)

Feature *non-goals* for the main codebase include:

- Client-side decoration (any more than is necessary to tell the clients not to)
- Client-initiated window management, such as move, resize, and close, which can
  be done through the compositor
- Animations and visual effects

## Acknowledgements

dwl began by extending the TinyWL example provided (CC0) by the sway/wlroots


@@ 164,17 182,20 @@ inspiration, and to the various contributors to the project, including:
- Stivvo for output management and fullscreen support, and patch maintenance


[Discord server]: https://discord.gg/jJxZnrGPWN
[wlroots]: https://gitlab.freedesktop.org/wlroots
[`systemd --user`]: https://wiki.archlinux.org/title/Systemd/User
[#dwl on Libera Chat]: https://web.libera.chat/?channels=#dwl
[Wayland]: https://wayland.freedesktop.org/
[wlroots]: https://gitlab.freedesktop.org/wlroots/wlroots/
[wlroots-next branch]: https://codeberg.org/dwl/dwl/src/branch/wlroots-next
[patches repository]: https://codeberg.org/dwl/dwl-patches
[s6]: https://skarnet.org/software/s6/
[0.7-rc1]: https://codeberg.org/dwl/dwl/releases/tag/v0.7-rc1
[0.x branch]: https://codeberg.org/dwl/dwl/branches
[anopa]: https://jjacky.com/anopa/
[runit]: http://smarden.org/runit/faq.html#userservices
[dinit]: https://davmac.org/projects/dinit/
[`systemd --user`]: https://wiki.archlinux.org/title/Systemd/User
[dwl-patches]: https://codeberg.org/dwl/dwl-patches
[list of useful resources on our wiki]: https://codeberg.org/dwl/dwl/wiki/Home#migrating-from-x
[main]: https://codeberg.org/dwl/dwl/src/branch/main
[release]: https://codeberg.org/dwl/dwl/releases
[runit]: http://smarden.org/runit/faq.html#userservices
[s6]: https://skarnet.org/software/s6/
[wlroots]: https://gitlab.freedesktop.org/wlroots/wlroots/
[wiki]: https://codeberg.org/dwl/dwl/wiki/Home#compatible-status-bars
[list of useful resources on our wiki]:
    https://codeberg.org/dwl/dwl/wiki/Home#migrating-from-x
[Discord server]: https://discord.gg/jJxZnrGPWN
[Wayland]: https://wayland.freedesktop.org/

M client.h => client.h +28 -32
@@ 126,9 126,9 @@ client_get_appid(Client *c)
{
#ifdef XWAYLAND
	if (client_is_x11(c))
		return c->surface.xwayland->class;
		return c->surface.xwayland->class ? c->surface.xwayland->class : "broken";
#endif
	return c->surface.xdg->toplevel->app_id;
	return c->surface.xdg->toplevel->app_id ? c->surface.xdg->toplevel->app_id : "broken";
}

static inline int


@@ 146,7 146,6 @@ client_get_pid(Client *c)
static inline void
client_get_clip(Client *c, struct wlr_box *clip)
{
	struct wlr_box xdg_geom = {0};
	*clip = (struct wlr_box){
		.x = 0,
		.y = 0,


@@ 159,9 158,8 @@ client_get_clip(Client *c, struct wlr_box *clip)
		return;
#endif

	wlr_xdg_surface_get_geometry(c->surface.xdg, &xdg_geom);
	clip->x = xdg_geom.x;
	clip->y = xdg_geom.y;
	clip->x = c->surface.xdg->geometry.x;
	clip->y = c->surface.xdg->geometry.y;
}

static inline void


@@ 176,7 174,7 @@ client_get_geometry(Client *c, struct wlr_box *geom)
		return;
	}
#endif
	wlr_xdg_surface_get_geometry(c->surface.xdg, geom);
	*geom = c->surface.xdg->geometry;
}

static inline Client *


@@ 212,9 210,9 @@ client_get_title(Client *c)
{
#ifdef XWAYLAND
	if (client_is_x11(c))
		return c->surface.xwayland->title;
		return c->surface.xwayland->title ? c->surface.xwayland->title : "broken";
#endif
	return c->surface.xdg->toplevel->title;
	return c->surface.xdg->toplevel->title ? c->surface.xdg->toplevel->title : "broken";
}

static inline int


@@ 227,16 225,15 @@ client_is_float_type(Client *c)
	if (client_is_x11(c)) {
		struct wlr_xwayland_surface *surface = c->surface.xwayland;
		xcb_size_hints_t *size_hints = surface->size_hints;
		size_t i;
		if (surface->modal)
			return 1;

		for (i = 0; i < surface->window_type_len; i++)
			if (surface->window_type[i] == netatom[NetWMWindowTypeDialog]
					|| surface->window_type[i] == netatom[NetWMWindowTypeSplash]
					|| surface->window_type[i] == netatom[NetWMWindowTypeToolbar]
					|| surface->window_type[i] == netatom[NetWMWindowTypeUtility])
				return 1;
		if (wlr_xwayland_surface_has_window_type(surface, WLR_XWAYLAND_NET_WM_WINDOW_TYPE_DIALOG)
				|| wlr_xwayland_surface_has_window_type(surface, WLR_XWAYLAND_NET_WM_WINDOW_TYPE_SPLASH)
				|| wlr_xwayland_surface_has_window_type(surface, WLR_XWAYLAND_NET_WM_WINDOW_TYPE_TOOLBAR)
				|| wlr_xwayland_surface_has_window_type(surface, WLR_XWAYLAND_NET_WM_WINDOW_TYPE_UTILITY)) {
			return 1;
		}

		return size_hints && size_hints->min_width > 0 && size_hints->min_height > 0
			&& (size_hints->max_width == size_hints->min_width


@@ 279,8 276,8 @@ client_is_stopped(Client *c)

	wl_client_get_credentials(c->surface.xdg->client->client, &pid, NULL, NULL);
	if (waitid(P_PID, pid, &in, WNOHANG|WCONTINUED|WSTOPPED|WNOWAIT) < 0) {
		/* This process is not our child process, while is very unluckely that
		 * it is stopped, in order to do not skip frames assume that it is. */
		/* This process is not our child process, while is very unlikely that
		 * it is stopped, in order to do not skip frames, assume that it is. */
		if (errno == ECHILD)
			return 1;
	} else if (in.si_pid) {


@@ 314,17 311,6 @@ client_notify_enter(struct wlr_surface *s, struct wlr_keyboard *kb)
}

static inline void
client_restack_surface(Client *c)
{
#ifdef XWAYLAND
	if (client_is_x11(c))
		wlr_xwayland_surface_restack(c->surface.xwayland, NULL,
				XCB_STACK_MODE_ABOVE);
#endif
	return;
}

static inline void
client_send_close(Client *c)
{
#ifdef XWAYLAND


@@ 356,6 342,13 @@ client_set_fullscreen(Client *c, int fullscreen)
	wlr_xdg_toplevel_set_fullscreen(c->surface.xdg->toplevel, fullscreen);
}

static inline void
client_set_scale(struct wlr_surface *s, float scale)
{
	wlr_fractional_scale_v1_notify_scale(s, scale);
	wlr_surface_set_preferred_buffer_scale(s, (int32_t)ceilf(scale));
}

static inline uint32_t
client_set_size(Client *c, uint32_t width, uint32_t height)
{


@@ 376,8 369,11 @@ static inline void
client_set_tiled(Client *c, uint32_t edges)
{
#ifdef XWAYLAND
	if (client_is_x11(c))
	if (client_is_x11(c)) {
		wlr_xwayland_surface_set_maximized(c->surface.xwayland,
				edges != WLR_EDGE_NONE, edges != WLR_EDGE_NONE);
		return;
  }
#endif
	if (wl_resource_get_version(c->surface.xdg->toplevel->resource)
			>= XDG_TOPLEVEL_STATE_TILED_RIGHT_SINCE_VERSION) {


@@ 403,8 399,8 @@ client_wants_focus(Client *c)
{
#ifdef XWAYLAND
	return client_is_unmanaged(c)
		&& wlr_xwayland_or_surface_wants_focus(c->surface.xwayland)
		&& wlr_xwayland_icccm_input_model(c->surface.xwayland) != WLR_ICCCM_INPUT_MODEL_NONE;
		&& wlr_xwayland_surface_override_redirect_wants_focus(c->surface.xwayland)
		&& wlr_xwayland_surface_icccm_input_model(c->surface.xwayland) != WLR_ICCCM_INPUT_MODEL_NONE;
#endif
	return 0;
}

M config.def.h => config.def.h +1 -1
@@ 12,7 12,7 @@ static const float bordercolor[]           = COLOR(0x444444ff);
static const float focuscolor[]            = COLOR(0x005577ff);
static const float urgentcolor[]           = COLOR(0xff0000ff);
/* This conforms to the xdg-protocol. Set the alpha to zero to restore the old behavior */
static const float fullscreen_bg[]         = {0.1f, 0.1f, 0.1f, 1.0f}; /* You can also use glsl colors */
static const float fullscreen_bg[]         = {0.0f, 0.0f, 0.0f, 1.0f}; /* You can also use glsl colors */

enum {
	BROWSER,

M config.mk => config.mk +21 -2
@@ 1,4 1,4 @@
_VERSION = 0.7-rc1
_VERSION = 0.8-dev
VERSION  = `git describe --tags --dirty 2>/dev/null || echo $(_VERSION)`

PKG_CONFIG = pkg-config


@@ 8,10 8,29 @@ PREFIX = /usr/local
MANDIR = $(PREFIX)/share/man
DATADIR = $(PREFIX)/share

WLR_INCS = `$(PKG_CONFIG) --cflags wlroots-0.19`
WLR_LIBS = `$(PKG_CONFIG) --libs wlroots-0.19`

# Allow using an alternative wlroots installation
# This has to have all the includes required by wlroots, e.g:
# Assuming wlroots git repo is "${PWD}/wlroots" and you only ran "meson setup build && ninja -C build"
#WLR_INCS = -I/usr/include/pixman-1 -I/usr/include/elogind -I/usr/include/libdrm \
#	-I$(PWD)/wlroots/include
# Set -rpath to avoid using the wrong library.
#WLR_LIBS = -Wl,-rpath,$(PWD)/wlroots/build -L$(PWD)/wlroots/build -lwlroots-0.19

# Assuming you ran "meson setup --prefix ${PWD}/0.19 build && ninja -C build install"
#WLR_INCS = -I/usr/include/pixman-1 -I/usr/include/elogind -I/usr/include/libdrm \
#	-I$(PWD)/wlroots/0.19/include/wlroots-0.19
#WLR_LIBS = -Wl,-rpath,$(PWD)/wlroots/0.19/lib64 -L$(PWD)/wlroots/0.19/lib64 -lwlroots-0.19

XWAYLAND =
XLIBS =
# Uncomment to build XWayland support
#XWAYLAND = -DXWAYLAND
#XLIBS = xcb xcb-icccm

CC = gcc
# dwl itself only uses C99 features, but wlroots' headers use anonymous unions (C11).
# To avoid warnings about them, we do not use -std=c99 and instead of using the
# gmake default 'CC=c99', we use cc.
CC = cc

M dwl.1 => dwl.1 +113 -13
@@ 37,7 37,7 @@ starts a shell process running
when starting.
When stopping, it sends
.Dv SIGTERM
to the child process and waits for it to exit.
to the child process group and waits for it to exit.
.Pp
Users are encouraged to customize
.Nm


@@ 55,10 55,10 @@ Move window to a single tag.
Toggle tag for window.
.It Mod-p
Spawn
.Nm wmenu-run .
.Xr wmenu-run 1 .
.It Mod-Shift-Return
Spawn
.Nm foot .
.Xr foot 1 .
.It Mod-[jk]
Move focus down/up the stack.
.It Mod-[id]


@@ 100,6 100,114 @@ Quit
.Nm .
.El
These might differ depending on your keyboard layout.
.Ss Mouse commands
.Bl -tag -width 20n -offset indent -compact
.It Mod-Button1
Move focused window while dragging.
Tiled windows will be toggled to the floating state.
.It Mod-Button2
Toggle focused window between floating and tiled state.
.It Mod-Button3
Resize focused window while dragging.
Tiled windows will be toggled to the floating state.
.El
.Sh STATUS INFORMATION
.Nm
writes its status information to standard output.
If the
.Fl s
option is given, the status information is written to the standard input of the
child process instead.
.Pp
Said information has the following format:
.Bd -ragged -offset indent
.Ar <monitor>
.Ar <component>
.Ar <data>
.Ed
.Pp
.Bl -tag -width 11n -offset 0 -compact
.It Ar <monitor>
is the name given to the output.
.It Ar <component>
is one of (in order)
.Em title ,
.Em appid ,
.Em fullscreen ,
.Em floating ,
.Em selmon ,
.Em tags ,
.Em layout .
.It Ar <data>
changes depending on
.Ar <component> .
.Bl -tag -width 10n -compact
.It Em title
The title of the focused window on
.Ar <monitor>
or nothing if there is no focused window.
.It Em appid
The app_id of the focused window on
.Ar <monitor>
or nothing if there is no focused window.
.It Em fullscreen
Prints 1 if the focused window on
.Ar <monitor>
is in fullscreen state, otherwise prints 0. If there is no focused
window it prints nothing.
.It Em floating
Prints 1 if the focused window on
.Ar <monitor>
is in floating state, otherwise prints 0. If there is no focused
window it prints nothing.
.It Em selmon
Prints 1 if
.Ar <monitor>
is the selected monitor, otherwise prints 0.
.It Em tags
Prints four bitmasks in the following order:
.Bl -bullet -width 2n -compact
.It
Occupied tags of
.Ar <monitor> .
.It
Selected tags of
.Ar <monitor> .
.It
Tags of the focused window on
.Ar <monitor> .
.It
Tags where a window on
.Ar <monitor>
requested activation or has urgency hints.
.El
The bitmasks are 32-bit unsigned decimal integers.
.It Em layout
Prints the symbol of the current layout.
.El
.El
.Ss Examples
When there is a selected window:
.Bd -literal -offset indent
HDMI\-A\-1 title \(ti/source/repos/dwl > man \-l dwl.1
HDMI\-A\-1 appid footclient
HDMI\-A\-1 fullscreen 0
HDMI\-A\-1 floating 0
HDMI\-A\-1 selmon 1
HDMI\-A\-1 tags 271 4 4 0
HDMI\-A\-1 layout [T]
.Ed
.Pp
When there is no selected window:
.Bd -literal -offset indent
HDMI\-A\-1 title
HDMI\-A\-1 appid
HDMI\-A\-1 fullscreen
HDMI\-A\-1 floating
HDMI\-A\-1 selmon 1
HDMI\-A\-1 tags 271 512 0 0
HDMI\-A\-1 layout [T]
.Ed
.Sh ENVIRONMENT
These environment variables are used by
.Nm :


@@ 140,19 248,11 @@ server.
Start
.Nm
with s6 in the background:
.Dl dwl -s 's6-svscan <&-'
.Dl dwl \-s \(aqs6\-svscan <&\-\(aq
.Sh SEE ALSO
.Xr dwm 1 ,
.Xr foot 1 ,
.Xr wmenu 1 ,
.Xr dwm 1 ,
.Xr xkeyboard-config 7
.Sh CAVEATS
The child process's standard input is connected with a pipe to
.Nm .
If the child process neither reads from the pipe nor closes its
standard input,
.Nm
will freeze after a while due to it blocking when writing to the full
pipe buffer.
.Sh BUGS
All of them.

M dwl.c => dwl.c +208 -190
@@ 35,6 35,7 @@
#include <wlr/types/wlr_keyboard_shortcuts_inhibit_v1.h>
#include <wlr/types/wlr_layer_shell_v1.h>
#include <wlr/types/wlr_linux_dmabuf_v1.h>
#include <wlr/types/wlr_linux_drm_syncobj_v1.h>
#include <wlr/types/wlr_output.h>
#include <wlr/types/wlr_output_layout.h>
#include <wlr/types/wlr_output_management_v1.h>


@@ 83,16 84,12 @@
#define END(A)                  ((A) + LENGTH(A))
#define TAGMASK                 ((1u << TAGCOUNT) - 1)
#define LISTEN(E, L, H)         wl_signal_add((E), ((L)->notify = (H), (L)))
#define LISTEN_STATIC(E, H)     do { static struct wl_listener _l = {.notify = (H)}; wl_signal_add((E), &_l); } while (0)
#define LISTEN_STATIC(E, H)     do { struct wl_listener *_l = ecalloc(1, sizeof(*_l)); _l->notify = (H); wl_signal_add((E), _l); } while (0)

/* enums */
enum { CurNormal, CurPressed, CurMove, CurResize }; /* cursor */
enum { XDGShell, LayerShell, X11 }; /* client types */
enum { LyrBg, LyrBottom, LyrTile, LyrFloat, LyrTop, LyrFS, LyrOverlay, LyrBlock, NUM_LAYERS }; /* scene layers */
#ifdef XWAYLAND
enum { NetWMWindowTypeDialog, NetWMWindowTypeSplash, NetWMWindowTypeToolbar,
	NetWMWindowTypeUtility, NetLast }; /* EWMH atoms */
#endif

typedef union {
	int i;


@@ 112,10 109,12 @@ typedef struct Pertag Pertag;
typedef struct Monitor Monitor;
typedef struct Client Client;
struct Client {
	/* Must keep these three elements in this order */
	/* Must keep this field first */
	unsigned int type; /* XDGShell or X11* */
	/* Must keep these three elements in this order */
	struct wlr_box geom; /* layout-relative, includes border */
	Monitor *mon;

	struct wlr_scene_tree *scene;
	struct wlr_scene_rect *border[4]; /* top, bottom, left, right */
	struct wlr_scene_tree *scene_surface;


@@ 186,9 185,9 @@ typedef struct {
} KeyboardGroup;

typedef struct {
	/* Must keep these three elements in this order */
	/* Must keep this field first */
	unsigned int type; /* LayerShell */
	struct wlr_box geom;

	Monitor *mon;
	struct wlr_scene_tree *scene;
	struct wlr_scene_tree *popups;


@@ 287,6 286,7 @@ static void chvt(const Arg *arg);
static void checkidleinhibitor(struct wlr_surface *exclude);
static void cleanup(void);
static void cleanupmon(struct wl_listener *listener, void *data);
static void cleanuplisteners(void);
static void closemon(Monitor *m);
static void commitlayersurfacenotify(struct wl_listener *listener, void *data);
static void commitnotify(struct wl_listener *listener, void *data);


@@ 315,7 315,6 @@ static void destroylocksurface(struct wl_listener *listener, void *data);
static void destroynotify(struct wl_listener *listener, void *data);
static void destroypointerconstraint(struct wl_listener *listener, void *data);
static void destroysessionlock(struct wl_listener *listener, void *data);
static void destroysessionmgr(struct wl_listener *listener, void *data);
static void destroykeyboardgroup(struct wl_listener *listener, void *data);
static void destroyshortcutsinhibitmgr(struct wl_listener *listener, void *data);
static Monitor *dirtomon(enum wlr_direction dir);


@@ 453,7 452,6 @@ static struct wlr_idle_inhibit_manager_v1 *idle_inhibit_mgr;
static struct wlr_keyboard_shortcuts_inhibit_manager_v1 *shortcuts_inhibit_mgr;
static struct wlr_layer_shell_v1 *layer_shell;
static struct wlr_output_manager_v1 *output_mgr;
static struct wlr_gamma_control_manager_v1 *gamma_control_mgr;
static struct wlr_virtual_keyboard_manager_v1 *virtual_keyboard_mgr;
static struct wlr_virtual_pointer_manager_v1 *virtual_pointer_mgr;
static struct wlr_cursor_shape_manager_v1 *cursor_shape_mgr;


@@ 491,17 489,47 @@ static struct zdwl_ipc_output_v2_interface dwl_output_implementation = {.release
static const int NORMAL = -1;
static int active_mode_index = NORMAL;

/* global event handlers */
static struct wl_listener cursor_axis = {.notify = axisnotify};
static struct wl_listener cursor_button = {.notify = buttonpress};
static struct wl_listener cursor_frame = {.notify = cursorframe};
static struct wl_listener cursor_motion = {.notify = motionrelative};
static struct wl_listener cursor_motion_absolute = {.notify = motionabsolute};
static struct wl_listener gpu_reset = {.notify = gpureset};
static struct wl_listener layout_change = {.notify = updatemons};
static struct wl_listener new_idle_inhibitor = {.notify = createidleinhibitor};
static struct wl_listener new_input_device = {.notify = inputdevice};
static struct wl_listener new_virtual_keyboard = {.notify = virtualkeyboard};
static struct wl_listener new_virtual_pointer = {.notify = virtualpointer};
static struct wl_listener new_pointer_constraint = {.notify = createpointerconstraint};
static struct wl_listener new_output = {.notify = createmon};
static struct wl_listener new_xdg_toplevel = {.notify = createnotify};
static struct wl_listener new_xdg_popup = {.notify = createpopup};
static struct wl_listener new_xdg_decoration = {.notify = createdecoration};
static struct wl_listener new_layer_surface = {.notify = createlayersurface};
static struct wl_listener output_mgr_apply = {.notify = outputmgrapply};
static struct wl_listener output_mgr_test = {.notify = outputmgrtest};
static struct wl_listener output_power_mgr_set_mode = {.notify = powermgrsetmode};
static struct wl_listener request_activate = {.notify = urgent};
static struct wl_listener request_cursor = {.notify = setcursor};
static struct wl_listener request_set_psel = {.notify = setpsel};
static struct wl_listener request_set_sel = {.notify = setsel};
static struct wl_listener request_set_cursor_shape = {.notify = setcursorshape};
static struct wl_listener request_start_drag = {.notify = requeststartdrag};
static struct wl_listener start_drag = {.notify = startdrag};
static struct wl_listener new_session_lock = {.notify = locksession};

#ifdef XWAYLAND
static void activatex11(struct wl_listener *listener, void *data);
static void associatex11(struct wl_listener *listener, void *data);
static void configurex11(struct wl_listener *listener, void *data);
static void createnotifyx11(struct wl_listener *listener, void *data);
static void dissociatex11(struct wl_listener *listener, void *data);
static xcb_atom_t getatom(xcb_connection_t *xc, const char *name);
static void sethints(struct wl_listener *listener, void *data);
static void xwaylandready(struct wl_listener *listener, void *data);
static struct wl_listener new_xwayland_surface = {.notify = createnotifyx11};
static struct wl_listener xwayland_ready = {.notify = xwaylandready};
static struct wlr_xwayland *xwayland;
static xcb_atom_t netatom[NetLast];
#endif

/* configuration, allows nested code to access above variables */


@@ 558,12 586,9 @@ applyrules(Client *c)
	const Rule *r;
	Monitor *mon = selmon, *m;

	c->isfloating = client_is_float_type(c);
	c->scratchkey = 0;
	if (!(appid = client_get_appid(c)))
		appid = broken;
	if (!(title = client_get_title(c)))
		title = broken;
	appid = client_get_appid(c);
	title = client_get_title(c);

	c->pid = client_get_pid(c);



@@ 610,6 635,7 @@ applyrules(Client *c)
		c->geom.x = (mon->w.width - c->geom.width) / 2 + mon->m.x;
		c->geom.y = (mon->w.height - c->geom.height) / 2 + mon->m.y;
	}
	c->isfloating |= client_is_float_type(c);
	setmon(c, mon, newtags);
	attachclients(mon);
}


@@ 663,13 689,14 @@ arrangelayer(Monitor *m, struct wl_list *list, struct wlr_box *usable_area, int 
	wl_list_for_each(l, list, link) {
		struct wlr_layer_surface_v1 *layer_surface = l->layer_surface;

		if (!layer_surface->initialized)
			continue;

		if (exclusive != (layer_surface->current.exclusive_zone > 0))
			continue;

		wlr_scene_layer_surface_v1_configure(l->scene_layer, &full_area, usable_area);
		wlr_scene_node_set_position(&l->popups->node, l->scene->node.x, l->scene->node.y);
		l->geom.x = l->scene->node.x;
		l->geom.y = l->scene->node.y;
	}
}



@@ 759,8 786,8 @@ axisnotify(struct wl_listener *listener, void *data)
	 * for example when you move the scroll wheel. */
	struct wlr_pointer_axis_event *event = data;
	wlr_idle_notifier_v1_notify_activity(idle_notifier, seat);
	/* TODO: allow usage of scroll whell for mousebindings, it can be implemented
	 * checking the event's orientation and the delta of the event */
	/* TODO: allow usage of scroll wheel for mousebindings, it can be implemented
	 * by checking the event's orientation and the delta of the event */
	/* Notify the client with pointer focus of the axis event. */
	wlr_seat_pointer_notify_axis(seat,
			event->time_msec, event->orientation, event->delta,


@@ 802,17 829,17 @@ buttonpress(struct wl_listener *listener, void *data)
		break;
	case WL_POINTER_BUTTON_STATE_RELEASED:
		/* If you released any buttons, we exit interactive move/resize mode. */
		/* TODO should reset to the pointer focus's current setcursor */
		/* TODO: should reset to the pointer focus's current setcursor */
		if (!locked && cursor_mode != CurNormal && cursor_mode != CurPressed) {
			wlr_cursor_set_xcursor(cursor, cursor_mgr, "default");
			cursor_mode = CurNormal;
			/* Drop the window off on its new monitor */
			selmon = xytomon(cursor->x, cursor->y);
			setmon(grabc, selmon, 0);
			grabc = NULL;
			return;
		} else {
			cursor_mode = CurNormal;
		}
		cursor_mode = CurNormal;
		break;
	}
	/* If the event wasn't handled by the compositor, notify the client with


@@ 848,6 875,7 @@ checkidleinhibitor(struct wlr_surface *exclude)
void
cleanup(void)
{
	cleanuplisteners();
#ifdef XWAYLAND
	wlr_xwayland_destroy(xwayland);
	xwayland = NULL;


@@ 861,8 889,8 @@ cleanup(void)

	destroykeyboardgroup(&kb_group->destroy, NULL);

	/* If it's not destroyed manually it will cause a use-after-free of wlr_seat.
	 * Destroy it until it's fixed in the wlroots side */
	/* If it's not destroyed manually, it will cause a use-after-free of wlr_seat.
	 * Destroy it until it's fixed on the wlroots side */
	wlr_backend_destroy(backend);

	wl_display_destroy(dpy);


@@ 892,6 920,8 @@ cleanupmon(struct wl_listener *listener, void *data)
	wl_list_remove(&m->frame.link);
	wl_list_remove(&m->link);
	wl_list_remove(&m->request_state.link);
	if (m->lock_surface)
		destroylocksurface(&m->destroy_lock_surface, NULL);
	m->wlr_output->data = NULL;
	wlr_output_layout_remove(output_layout, m->wlr_output);
	wlr_scene_output_destroy(m->scene_output);


@@ 902,6 932,43 @@ cleanupmon(struct wl_listener *listener, void *data)
}

void
cleanuplisteners(void)
{
	wl_list_remove(&cursor_axis.link);
	wl_list_remove(&cursor_button.link);
	wl_list_remove(&cursor_frame.link);
	wl_list_remove(&cursor_motion.link);
	wl_list_remove(&cursor_motion_absolute.link);
	wl_list_remove(&gpu_reset.link);
	wl_list_remove(&new_idle_inhibitor.link);
	wl_list_remove(&layout_change.link);
	wl_list_remove(&new_input_device.link);
	wl_list_remove(&new_virtual_keyboard.link);
	wl_list_remove(&new_virtual_pointer.link);
	wl_list_remove(&new_pointer_constraint.link);
	wl_list_remove(&new_output.link);
	wl_list_remove(&new_xdg_toplevel.link);
	wl_list_remove(&new_xdg_decoration.link);
	wl_list_remove(&new_xdg_popup.link);
	wl_list_remove(&new_layer_surface.link);
	wl_list_remove(&output_mgr_apply.link);
	wl_list_remove(&output_mgr_test.link);
	wl_list_remove(&output_power_mgr_set_mode.link);
	wl_list_remove(&request_activate.link);
	wl_list_remove(&request_cursor.link);
	wl_list_remove(&request_set_psel.link);
	wl_list_remove(&request_set_sel.link);
	wl_list_remove(&request_set_cursor_shape.link);
	wl_list_remove(&request_start_drag.link);
	wl_list_remove(&start_drag.link);
	wl_list_remove(&new_session_lock.link);
#ifdef XWAYLAND
	wl_list_remove(&new_xwayland_surface.link);
	wl_list_remove(&xwayland_ready.link);
#endif
}

void
closemon(Monitor *m)
{
	/* update selmon if needed and


@@ 942,6 1009,8 @@ commitlayersurfacenotify(struct wl_listener *listener, void *data)
	struct wlr_layer_surface_v1_state old_state;

	if (l->layer_surface->initial_commit) {
		client_set_scale(layer_surface->surface, l->mon->wlr_output->scale);

		/* Temporarily set the layer's current state to pending
		 * so that we can easily arrange it */
		old_state = l->layer_surface->current;


@@ 975,23 1044,24 @@ commitnotify(struct wl_listener *listener, void *data)
		/*
		 * Get the monitor this client will be rendered on
		 * Note that if the user set a rule in which the client is placed on
		 * a different monitor based on its title this will likely select
		 * a different monitor based on its title, this will likely select
		 * a wrong monitor.
		 */
		applyrules(c);
		wlr_surface_set_preferred_buffer_scale(client_surface(c), (int)ceilf(c->mon->wlr_output->scale));
		wlr_fractional_scale_v1_notify_scale(client_surface(c), c->mon->wlr_output->scale);
		if (c->mon) {
			client_set_scale(client_surface(c), c->mon->wlr_output->scale);
		}
		setmon(c, NULL, 0); /* Make sure to reapply rules in mapnotify() */

		wlr_xdg_toplevel_set_wm_capabilities(c->surface.xdg->toplevel, WLR_XDG_TOPLEVEL_WM_CAPABILITIES_FULLSCREEN);
		wlr_xdg_toplevel_set_size(c->surface.xdg->toplevel, 0, 0);
		wlr_xdg_toplevel_set_wm_capabilities(c->surface.xdg->toplevel,
				WLR_XDG_TOPLEVEL_WM_CAPABILITIES_FULLSCREEN);
		if (c->decoration)
			requestdecorationmode(&c->set_decoration_mode, c->decoration);
		wlr_xdg_toplevel_set_size(c->surface.xdg->toplevel, 0, 0);
		return;
	}

	if (client_surface(c)->mapped && c->mon)
		resize(c, c->geom, (c->isfloating && !c->isfullscreen));
	resize(c, c->geom, (c->isfloating && !c->isfullscreen));

	/* mark a pending resize as completed */
	if (c->resize && c->resize <= c->surface.xdg->current.configure_serial)


@@ 1016,13 1086,16 @@ commitpopup(struct wl_listener *listener, void *data)
		return;
	popup->base->surface->data = wlr_scene_xdg_surface_create(
			popup->parent->data, popup->base);
	if ((l && !l->mon) || (c && !c->mon))
	if ((l && !l->mon) || (c && !c->mon)) {
		wlr_xdg_popup_destroy(popup);
		return;
	}
	box = type == LayerShell ? l->mon->m : c->mon->w;
	box.x -= (type == LayerShell ? l->geom.x : c->geom.x);
	box.y -= (type == LayerShell ? l->geom.y : c->geom.y);
	box.x -= (type == LayerShell ? l->scene->node.x : c->geom.x);
	box.y -= (type == LayerShell ? l->scene->node.y : c->geom.y);
	wlr_xdg_popup_unconstrain_from_box(popup, &box);
	wl_list_remove(&listener->link);
	free(listener);
}

void


@@ 1124,8 1197,6 @@ createlayersurface(struct wl_listener *listener, void *data)

	wl_list_insert(&l->mon->layers[layer_surface->pending.layer],&l->link);
	wlr_surface_send_enter(surface, layer_surface->output);
	wlr_fractional_scale_v1_notify_scale(surface, l->mon->wlr_output->scale);
	wlr_surface_set_preferred_buffer_scale(surface, (int32_t)ceilf(l->mon->wlr_output->scale));
}

void


@@ 1302,10 1373,10 @@ createpointer(struct wlr_pointer *pointer)
			libinput_device_config_middle_emulation_set_enabled(device, middle_button_emulation);

		if (libinput_device_config_scroll_get_methods(device) != LIBINPUT_CONFIG_SCROLL_NO_SCROLL)
			libinput_device_config_scroll_set_method (device, scroll_method);
			libinput_device_config_scroll_set_method(device, scroll_method);

		if (libinput_device_config_click_get_methods(device) != LIBINPUT_CONFIG_CLICK_METHOD_NONE)
			libinput_device_config_click_set_method (device, click_method);
			libinput_device_config_click_set_method(device, click_method);

		if (libinput_device_config_send_events_get_modes(device))
			libinput_device_config_send_events_set_mode(device, send_events_mode);


@@ 1357,7 1428,7 @@ cursorconstrain(struct wlr_pointer_constraint_v1 *constraint)
void
cursorframe(struct wl_listener *listener, void *data)
{
	/* This event is forwarded by the cursor when a pointer emits an frame
	/* This event is forwarded by the cursor when a pointer emits a frame
	 * event. Frame events are sent after regular pointer events to group
	 * multiple events together. For instance, two axis events may happen at the
	 * same time, in which case a frame event won't be sent in between. */


@@ 1383,7 1454,6 @@ void
destroydecoration(struct wl_listener *listener, void *data)
{
	Client *c = wl_container_of(listener, c, destroy_decoration);
	c->decoration = NULL;

	wl_list_remove(&c->destroy_decoration.link);
	wl_list_remove(&c->set_decoration_mode.link);


@@ 1395,6 1465,8 @@ destroydragicon(struct wl_listener *listener, void *data)
	/* Focus enter isn't sent during drag, so refocus the focused node. */
	focusclient(focustop(selmon), 1);
	motionnotify(0, NULL, 0, 0, 0, 0);
	wl_list_remove(&listener->link);
	free(listener);
}

void


@@ 1403,6 1475,8 @@ destroyidleinhibitor(struct wl_listener *listener, void *data)
	/* `data` is the wlr_surface of the idle inhibitor being destroyed,
	 * at this point the idle inhibitor is still in the list of the manager */
	checkidleinhibitor(wlr_surface_get_root_surface(data));
	wl_list_remove(&listener->link);
	free(listener);
}

void


@@ 1484,6 1558,7 @@ destroynotify(struct wl_listener *listener, void *data)
		wl_list_remove(&c->commit.link);
		wl_list_remove(&c->map.link);
		wl_list_remove(&c->unmap.link);
		wl_list_remove(&c->maximize.link);
	}
	free(c);
}


@@ 1510,21 1585,14 @@ destroysessionlock(struct wl_listener *listener, void *data)
}

void
destroysessionmgr(struct wl_listener *listener, void *data)
{
	wl_list_remove(&lock_listener.link);
	wl_list_remove(&listener->link);
}

void
destroykeyboardgroup(struct wl_listener *listener, void *data)
{
	KeyboardGroup *group = wl_container_of(listener, group, destroy);
	wl_event_source_remove(group->key_repeat_source);
	wlr_keyboard_group_destroy(group->wlr_group);
	wl_list_remove(&group->key.link);
	wl_list_remove(&group->modifiers.link);
	wl_list_remove(&group->destroy.link);
	wlr_keyboard_group_destroy(group->wlr_group);
	free(group);
}



@@ 1786,7 1854,6 @@ focusclient(Client *c, int lift)
		wl_list_insert(&fstack, &c->flink);
		selmon = c->mon;
		c->isurgent = 0;
		client_restack_surface(c);

		/* Don't change border color if there is an exclusive focus or we are
		 * handling a drag operation */


@@ 1978,7 2045,7 @@ focusstack(const Arg *arg)
	focusclient(c, 1);
}

/* We probably should change the name of this, it sounds like
/* We probably should change the name of this: it sounds like it
 * will focus the topmost client of this mon, when actually will
 * only return that client */
Client *


@@ 2034,7 2101,8 @@ gpureset(struct wl_listener *listener, void *data)
	if (!(alloc = wlr_allocator_autocreate(backend, drw)))
		die("couldn't recreate allocator");

	LISTEN_STATIC(&drw->events.lost, gpureset);
	wl_list_remove(&gpu_reset.link);
	wl_signal_add(&drw->events.lost, &gpu_reset);

	wlr_compositor_set_renderer(compositor, drw);



@@ 2049,22 2117,10 @@ gpureset(struct wl_listener *listener, void *data)
void
handlesig(int signo)
{
	if (signo == SIGCHLD) {
#ifdef XWAYLAND
		siginfo_t in;
		/* wlroots expects to reap the XWayland process itself, so we
		 * use WNOWAIT to keep the child waitable until we know it's not
		 * XWayland.
		 */
		while (!waitid(P_ALL, 0, &in, WEXITED|WNOHANG|WNOWAIT) && in.si_pid
				&& (!xwayland || in.si_pid != xwayland->server->pid))
			waitpid(in.si_pid, NULL, 0);
#else
	if (signo == SIGCHLD)
		while (waitpid(-1, NULL, WNOHANG) > 0);
#endif
	} else if (signo == SIGINT || signo == SIGTERM) {
	else if (signo == SIGINT || signo == SIGTERM)
		quit(NULL);
	}
}

pid_t


@@ 2323,7 2379,8 @@ mapnotify(struct wl_listener *listener, void *data)

	/* Create scene tree for this client and its border */
	c->scene = client_surface(c)->data = wlr_scene_tree_create(layers[LyrTile]);
	wlr_scene_node_set_enabled(&c->scene->node, c->type != XDGShell);
	/* Enabled later by a call to arrange() */
	wlr_scene_node_set_enabled(&c->scene->node, client_is_unmanaged(c));
	c->scene_surface = c->type == XDGShell
			? wlr_scene_xdg_surface_create(c->scene, c->surface.xdg)
			: wlr_scene_subsurface_tree_create(c->scene, client_surface(c));


@@ 2336,6 2393,7 @@ mapnotify(struct wl_listener *listener, void *data)
		/* Unmanaged clients always are floating */
		wlr_scene_node_reparent(&c->scene->node, layers[LyrFloat]);
		wlr_scene_node_set_position(&c->scene->node, c->geom.x, c->geom.y);
		client_set_size(c, c->geom.width, c->geom.height);
		if (client_wants_focus(c)) {
			focusclient(c, 1);
			exclusive_focus = c;


@@ 2360,8 2418,8 @@ mapnotify(struct wl_listener *listener, void *data)

	/* Set initial monitor, tags, floating status, and focus:
	 * we always consider floating, clients that have parent and thus
	 * we set the same tags and monitor than its parent, if not
	 * try to apply rules for them */
	 * we set the same tags and monitor as its parent.
	 * If there is no parent, apply rules */
	if ((p = client_get_parent(c))) {
		c->isfloating = 1;
		if (p->mon) {


@@ 2459,8 2517,7 @@ motionabsolute(struct wl_listener *listener, void *data)
	 * motion event, from 0..1 on each axis. This happens, for example, when
	 * wlroots is running under a Wayland window rather than KMS+DRM, and you
	 * move the mouse over the window. You could enter the window from any edge,
	 * so we have to warp the mouse there. There is also some hardware which
	 * emits these events. */
	 * so we have to warp the mouse there. Also, some hardware emits these events. */
	struct wlr_pointer_motion_absolute_event *event = data;
	double lx, ly, dx, dy;



@@ 2491,8 2548,8 @@ motionnotify(uint32_t time, struct wlr_input_device *device, double dx, double d
			&& toplevel_from_wlr_surface(seat->pointer_state.focused_surface, &w, &l) >= 0) {
		c = w;
		surface = seat->pointer_state.focused_surface;
		sx = cursor->x - (l ? l->geom.x : w->geom.x);
		sy = cursor->y - (l ? l->geom.y : w->geom.y);
		sx = cursor->x - (l ? l->scene->node.x : w->geom.x);
		sy = cursor->y - (l ? l->scene->node.y : w->geom.y);
	}

	/* time is 0 in internal calls meant to restore pointer focus. */


@@ 2582,7 2639,7 @@ moveresize(const Arg *arg)
	case CurMove:
		grabcx = (int)round(cursor->x) - grabc->geom.x;
		grabcy = (int)round(cursor->y) - grabc->geom.y;
		wlr_cursor_set_xcursor(cursor, cursor_mgr, "fleur");
		wlr_cursor_set_xcursor(cursor, cursor_mgr, "all-scroll");
		break;
	case CurResize:
		/* Doesn't work for X11 output - the next absolute motion event


@@ 2645,9 2702,9 @@ apply_or_test:
		ok &= test ? wlr_output_test_state(wlr_output, &state)
				: wlr_output_commit_state(wlr_output, &state);

		/* Don't move monitors if position wouldn't change, this to avoid
		* wlroots marking the output as manually configured.
		* wlr_output_layout_add does not like disabled outputs */
		/* Don't move monitors if position wouldn't change. This avoids
		 * wlroots marking the output as manually configured.
		 * wlr_output_layout_add does not like disabled outputs */
		if (!test && wlr_output->enabled && (m->m.x != config_head->state.x || m->m.y != config_head->state.y))
			wlr_output_layout_add(output_layout, wlr_output,
					config_head->state.x, config_head->state.y);


@@ 2724,6 2781,7 @@ powermgrsetmode(struct wl_listener *listener, void *data)
	wlr_output_commit_state(m->wlr_output, &state);

	m->asleep = !event->mode;
	updatemons(NULL, NULL);
}

void


@@ 2740,7 2798,6 @@ rendermon(struct wl_listener *listener, void *data)
	Monitor *m = wl_container_of(listener, m, frame);
	Client *c;
	struct wlr_output_state pending = {0};
	struct wlr_gamma_control_v1 *gamma_control;
	struct timespec now;

	/* Render if no XDG clients have an outstanding resize and are visible on


@@ 2750,32 2807,7 @@ rendermon(struct wl_listener *listener, void *data)
			goto skip;
	}

	/*
	 * HACK: The "correct" way to set the gamma is to commit it together with
	 * the rest of the state in one go, but to do that we would need to rewrite
	 * wlr_scene_output_commit() in order to add the gamma to the pending
	 * state before committing, instead try to commit the gamma in one frame,
	 * and commit the rest of the state in the next one (or in the same frame if
	 * the gamma can not be committed).
	 */
	if (m->gamma_lut_changed) {
		gamma_control
				= wlr_gamma_control_manager_v1_get_control(gamma_control_mgr, m->wlr_output);
		m->gamma_lut_changed = 0;

		if (!wlr_gamma_control_v1_apply(gamma_control, &pending))
			goto commit;

		if (!wlr_output_test_state(m->wlr_output, &pending)) {
			wlr_gamma_control_v1_send_failed_and_destroy(gamma_control);
			goto commit;
		}
		wlr_output_commit_state(m->wlr_output, &pending);
		wlr_output_schedule_frame(m->wlr_output);
	} else {
commit:
		wlr_scene_output_commit(m->scene_output, NULL);
	}
	wlr_scene_output_commit(m->scene_output, NULL);

skip:
	/* Let clients know a frame has been rendered */


@@ 2819,7 2851,7 @@ resize(Client *c, struct wlr_box geo, int interact)
	struct wlr_box *bbox;
	struct wlr_box clip;

	if (!c->mon || !c->scene)
	if (!c->mon || !client_surface(c)->mapped)
		return;

	bbox = interact ? &sgeom : &c->mon->w;


@@ 2880,8 2912,10 @@ run(char *startup_cmd)
		close(piperw[0]);
	}

	/* Mark stdout as non-blocking to avoid people who does not close stdin
	 * nor consumes it in their startup script getting dwl frozen */
	/* Mark stdout as non-blocking to avoid the startup script
	 * causing dwl to freeze when a user neither closes stdin
	 * nor consumes standard input in his startup script */

	if (fd_set_nonblock(STDOUT_FILENO) < 0)
		close(STDOUT_FILENO);



@@ 2892,7 2926,7 @@ run(char *startup_cmd)
	selmon = xytomon(cursor->x, cursor->y);

	/* TODO hack to get cursor to display in its initial location (100, 100)
	 * instead of (0, 0) and then jumping. still may not be fully
	 * instead of (0, 0) and then jumping. Still may not be fully
	 * initialized, as the image/coordinates are not transformed for the
	 * monitor when displayed here */
	wlr_cursor_warp_closest(cursor, NULL, cursor->x, cursor->y);


@@ 2915,7 2949,7 @@ setcursor(struct wl_listener *listener, void *data)
	 * event, which will result in the client requesting set the cursor surface */
	if (cursor_mode != CurNormal && cursor_mode != CurPressed)
		return;
	/* This can be sent by any client, so we check to make sure this one is
	/* This can be sent by any client, so we check to make sure this one
	 * actually has pointer focus first. If so, we can tell the cursor to
	 * use the provided surface as the cursor image. It will set the
	 * hardware cursor on the output that it's currently on and continue to


@@ 2931,7 2965,7 @@ setcursorshape(struct wl_listener *listener, void *data)
	struct wlr_cursor_shape_manager_v1_request_set_shape_event *event = data;
	if (cursor_mode != CurNormal && cursor_mode != CurPressed)
		return;
	/* This can be sent by any client, so we check to make sure this one is
	/* This can be sent by any client, so we check to make sure this one
	 * actually has pointer focus first. If so, we can tell the cursor to
	 * use the provided cursor shape. */
	if (event->seat_client == seat->pointer_state.focused_client)


@@ 3060,7 3094,7 @@ setpsel(struct wl_listener *listener, void *data)
{
	/* This event is raised by the seat when a client wants to set the selection,
	 * usually when the user copies something. wlroots allows compositors to
	 * ignore such requests if they so choose, but in dwl we always honor
	 * ignore such requests if they so choose, but in dwl we always honor them
	 */
	struct wlr_seat_request_set_primary_selection_event *event = data;
	wlr_seat_set_primary_selection(seat, event->source, event->serial);


@@ 3071,7 3105,7 @@ setsel(struct wl_listener *listener, void *data)
{
	/* This event is raised by the seat when a client wants to set the selection,
	 * usually when the user copies something. wlroots allows compositors to
	 * ignore such requests if they so choose, but in dwl we always honor
	 * ignore such requests if they so choose, but in dwl we always honor them
	 */
	struct wlr_seat_request_set_selection_event *event = data;
	wlr_seat_set_selection(seat, event->source, event->serial);


@@ 3084,7 3118,7 @@ setup(void)
	struct xkb_context *context;
	struct xkb_keymap *keymap;

	int i, sig[] = {SIGCHLD, SIGINT, SIGTERM, SIGPIPE};
	int drm_fd, i, sig[] = {SIGCHLD, SIGINT, SIGTERM, SIGPIPE};
	struct sigaction sa = {.sa_flags = SA_RESTART, .sa_handler = handlesig};
	sigemptyset(&sa.sa_mask);



@@ 3119,12 3153,12 @@ setup(void)
	 * supports for shared memory, this configures that for clients. */
	if (!(drw = wlr_renderer_autocreate(backend)))
		die("couldn't create renderer");
	LISTEN_STATIC(&drw->events.lost, gpureset);
	wl_signal_add(&drw->events.lost, &gpu_reset);

	/* Create shm, drm and linux_dmabuf interfaces by ourselves.
	 * The simplest way is call:
	 * The simplest way is to call:
	 *      wlr_renderer_init_wl_display(drw);
	 * but we need to create manually the linux_dmabuf interface to integrate it
	 * but we need to create the linux_dmabuf interface manually to integrate it
	 * with wlr_scene. */
	wlr_renderer_init_wl_shm(drw, dpy);



@@ 3134,6 3168,10 @@ setup(void)
				wlr_linux_dmabuf_v1_create_with_renderer(dpy, 5, drw));
	}

	if ((drm_fd = wlr_renderer_get_drm_fd(drw)) >= 0 && drw->features.timeline
			&& backend->features.timeline)
		wlr_linux_drm_syncobj_manager_v1_create(dpy, 1, drm_fd);

	/* Autocreates an allocator for us.
	 * The allocator is the bridge between the renderer and the backend. It
	 * handles the buffer creation, allowing wlroots to render onto the


@@ 3157,24 3195,24 @@ setup(void)
	wlr_viewporter_create(dpy);
	wlr_single_pixel_buffer_manager_v1_create(dpy);
	wlr_fractional_scale_manager_v1_create(dpy, 1);
	wlr_presentation_create(dpy, backend);
	wlr_presentation_create(dpy, backend, 2);
	wlr_alpha_modifier_v1_create(dpy);

	/* Initializes the interface used to implement urgency hints */
	activation = wlr_xdg_activation_v1_create(dpy);
	LISTEN_STATIC(&activation->events.request_activate, urgent);
	wl_signal_add(&activation->events.request_activate, &request_activate);

	gamma_control_mgr = wlr_gamma_control_manager_v1_create(dpy);
	LISTEN_STATIC(&gamma_control_mgr->events.set_gamma, setgamma);
	wlr_scene_set_gamma_control_manager_v1(scene, wlr_gamma_control_manager_v1_create(dpy));

	power_mgr = wlr_output_power_manager_v1_create(dpy);
	LISTEN_STATIC(&power_mgr->events.set_mode, powermgrsetmode);
	wl_signal_add(&power_mgr->events.set_mode, &output_power_mgr_set_mode);

	/* Creates an output layout, which a wlroots utility for working with an
	/* Creates an output layout, which is a wlroots utility for working with an
	 * arrangement of screens in a physical layout. */
	output_layout = wlr_output_layout_create(dpy);
	LISTEN_STATIC(&output_layout->events.change, updatemons);
	wlr_xdg_output_manager_v1_create(dpy, output_layout);
	wl_signal_add(&output_layout->events.change, &layout_change);

    wlr_xdg_output_manager_v1_create(dpy, output_layout);

	for (i = 0; i <= TAGCOUNT; i++) {
		for (r = tagrules; r < END(tagrules); r++) {


@@ 3192,7 3230,7 @@ setup(void)
	/* Configure a listener to be notified when new outputs are available on the
	 * backend. */
	wl_list_init(&mons);
	LISTEN_STATIC(&backend->events.new_output, createmon);
	wl_signal_add(&backend->events.new_output, &new_output);

	/* Set up our client lists, the xdg-shell and the layer-shell. The xdg-shell is a
	 * Wayland protocol which is used for application windows. For more


@@ 3204,20 3242,19 @@ setup(void)
	wl_list_init(&fstack);

	xdg_shell = wlr_xdg_shell_create(dpy, 6);
	LISTEN_STATIC(&xdg_shell->events.new_toplevel, createnotify);
	LISTEN_STATIC(&xdg_shell->events.new_popup, createpopup);
	wl_signal_add(&xdg_shell->events.new_toplevel, &new_xdg_toplevel);
	wl_signal_add(&xdg_shell->events.new_popup, &new_xdg_popup);

	layer_shell = wlr_layer_shell_v1_create(dpy, 3);
	LISTEN_STATIC(&layer_shell->events.new_surface, createlayersurface);
	wl_signal_add(&layer_shell->events.new_surface, &new_layer_surface);

	idle_notifier = wlr_idle_notifier_v1_create(dpy);

	idle_inhibit_mgr = wlr_idle_inhibit_v1_create(dpy);
	LISTEN_STATIC(&idle_inhibit_mgr->events.new_inhibitor, createidleinhibitor);
	wl_signal_add(&idle_inhibit_mgr->events.new_inhibitor, &new_idle_inhibitor);

	session_lock_mgr = wlr_session_lock_manager_v1_create(dpy);
	wl_signal_add(&session_lock_mgr->events.new_lock, &lock_listener);
	LISTEN_STATIC(&session_lock_mgr->events.destroy, destroysessionmgr);
	wl_signal_add(&session_lock_mgr->events.new_lock, &new_session_lock);
	locked_bg = wlr_scene_rect_create(layers[LyrBlock], sgeom.width, sgeom.height,
			(float [4]){0.1f, 0.1f, 0.1f, 1.0f});
	wlr_scene_node_set_enabled(&locked_bg->node, 0);


@@ 3231,10 3268,10 @@ setup(void)
			wlr_server_decoration_manager_create(dpy),
			WLR_SERVER_DECORATION_MANAGER_MODE_SERVER);
	xdg_decoration_mgr = wlr_xdg_decoration_manager_v1_create(dpy);
	LISTEN_STATIC(&xdg_decoration_mgr->events.new_toplevel_decoration, createdecoration);
	wl_signal_add(&xdg_decoration_mgr->events.new_toplevel_decoration, &new_xdg_decoration);

	pointer_constraints = wlr_pointer_constraints_v1_create(dpy);
	LISTEN_STATIC(&pointer_constraints->events.new_constraint, createpointerconstraint);
	wl_signal_add(&pointer_constraints->events.new_constraint, &new_pointer_constraint);

	relative_pointer_mgr = wlr_relative_pointer_manager_v1_create(dpy);



@@ 3262,14 3299,14 @@ setup(void)
	 *
	 * And more comments are sprinkled throughout the notify functions above.
	 */
	LISTEN_STATIC(&cursor->events.motion, motionrelative);
	LISTEN_STATIC(&cursor->events.motion_absolute, motionabsolute);
	LISTEN_STATIC(&cursor->events.button, buttonpress);
	LISTEN_STATIC(&cursor->events.axis, axisnotify);
	LISTEN_STATIC(&cursor->events.frame, cursorframe);
	wl_signal_add(&cursor->events.motion, &cursor_motion);
	wl_signal_add(&cursor->events.motion_absolute, &cursor_motion_absolute);
	wl_signal_add(&cursor->events.button, &cursor_button);
	wl_signal_add(&cursor->events.axis, &cursor_axis);
	wl_signal_add(&cursor->events.frame, &cursor_frame);

	cursor_shape_mgr = wlr_cursor_shape_manager_v1_create(dpy, 1);
	LISTEN_STATIC(&cursor_shape_mgr->events.request_set_shape, setcursorshape);
	wl_signal_add(&cursor_shape_mgr->events.request_set_shape, &request_set_cursor_shape);

	/*
	 * Configures a seat, which is a single "seat" at which a user sits and


@@ 3277,25 3314,27 @@ setup(void)
	 * pointer, touch, and drawing tablet device. We also rig up a listener to
	 * let us know when new input devices are available on the backend.
	 */
	LISTEN_STATIC(&backend->events.new_input, inputdevice);
	wl_signal_add(&backend->events.new_input, &new_input_device);
	virtual_keyboard_mgr = wlr_virtual_keyboard_manager_v1_create(dpy);
	LISTEN_STATIC(&virtual_keyboard_mgr->events.new_virtual_keyboard, virtualkeyboard);
	wl_signal_add(&virtual_keyboard_mgr->events.new_virtual_keyboard,
			&new_virtual_keyboard);
	virtual_pointer_mgr = wlr_virtual_pointer_manager_v1_create(dpy);
	LISTEN_STATIC(&virtual_pointer_mgr->events.new_virtual_pointer, virtualpointer);
    wl_signal_add(&virtual_pointer_mgr->events.new_virtual_pointer,
            &new_virtual_pointer);

	seat = wlr_seat_create(dpy, "seat0");
	LISTEN_STATIC(&seat->events.request_set_cursor, setcursor);
	LISTEN_STATIC(&seat->events.request_set_selection, setsel);
	LISTEN_STATIC(&seat->events.request_set_primary_selection, setpsel);
	LISTEN_STATIC(&seat->events.request_start_drag, requeststartdrag);
	LISTEN_STATIC(&seat->events.start_drag, startdrag);
	wl_signal_add(&seat->events.request_set_cursor, &request_cursor);
	wl_signal_add(&seat->events.request_set_selection, &request_set_sel);
	wl_signal_add(&seat->events.request_set_primary_selection, &request_set_psel);
	wl_signal_add(&seat->events.request_start_drag, &request_start_drag);
	wl_signal_add(&seat->events.start_drag, &start_drag);

	kb_group = createkeyboardgroup();
	wl_list_init(&kb_group->destroy.link);

	output_mgr = wlr_output_manager_v1_create(dpy);
	LISTEN_STATIC(&output_mgr->events.apply, outputmgrapply);
	LISTEN_STATIC(&output_mgr->events.test, outputmgrtest);
	wl_signal_add(&output_mgr->events.apply, &output_mgr_apply);
	wl_signal_add(&output_mgr->events.test, &output_mgr_test);

	wl_global_create(dpy, &zdwl_ipc_manager_v2_interface, 2, NULL, dwl_ipc_manager_bind);



@@ 3309,8 3348,8 @@ setup(void)
	 * It will be started when the first X client is started.
	 */
	if ((xwayland = wlr_xwayland_create(dpy, compositor, 1))) {
		LISTEN_STATIC(&xwayland->events.ready, xwaylandready);
		LISTEN_STATIC(&xwayland->events.new_surface, createnotifyx11);
		wl_signal_add(&xwayland->events.ready, &xwayland_ready);
		wl_signal_add(&xwayland->events.new_surface, &new_xwayland_surface);

		setenv("DISPLAY", xwayland->display_name, 1);
	} else {


@@ 3821,11 3860,11 @@ void
virtualpointer(struct wl_listener *listener, void *data)
{
	struct wlr_virtual_pointer_v1_new_pointer_event *event = data;
	struct wlr_pointer pointer = event->new_pointer->pointer;
	struct wlr_input_device *device = &event->new_pointer->pointer.base;

	wlr_cursor_attach_input_device(cursor, &pointer.base);
	wlr_cursor_attach_input_device(cursor, device);
	if (event->suggested_output)
		wlr_cursor_map_input_to_output(cursor, &pointer.base, event->suggested_output);
		wlr_cursor_map_input_to_output(cursor, device, event->suggested_output);
}

Monitor *


@@ 3932,17 3971,24 @@ configurex11(struct wl_listener *listener, void *data)
{
	Client *c = wl_container_of(listener, c, configure);
	struct wlr_xwayland_surface_configure_event *event = data;
	/* TODO: figure out if there is another way to do this */
	if (!c->mon) {
	if (!client_surface(c) || !client_surface(c)->mapped) {
		wlr_xwayland_surface_configure(c->surface.xwayland,
				event->x, event->y, event->width, event->height);
		return;
	}
	if (c->isfloating || client_is_unmanaged(c))
		resize(c, (struct wlr_box){.x = event->x, .y = event->y,
				.width = event->width + c->bw * 2, .height = event->height + c->bw * 2}, 0);
	else
	if (client_is_unmanaged(c)) {
		wlr_scene_node_set_position(&c->scene->node, event->x, event->y);
		wlr_xwayland_surface_configure(c->surface.xwayland,
				event->x, event->y, event->width, event->height);
		return;
	}
	if ((c->isfloating && c != grabc) || !c->mon->lt[c->mon->sellt]->arrange) {
		resize(c, (struct wlr_box){.x = event->x - c->bw,
				.y = event->y - c->bw, .width = event->width + c->bw * 2,
				.height = event->height + c->bw * 2}, 0);
	} else {
		arrange(c->mon);
	}
}

void


@@ 3976,25 4022,12 @@ dissociatex11(struct wl_listener *listener, void *data)
	wl_list_remove(&c->unmap.link);
}

xcb_atom_t
getatom(xcb_connection_t *xc, const char *name)
{
	xcb_atom_t atom = 0;
	xcb_intern_atom_reply_t *reply;
	xcb_intern_atom_cookie_t cookie = xcb_intern_atom(xc, 0, strlen(name), name);
	if ((reply = xcb_intern_atom_reply(xc, cookie, NULL)))
		atom = reply->atom;
	free(reply);

	return atom;
}

void
sethints(struct wl_listener *listener, void *data)
{
	Client *c = wl_container_of(listener, c, set_hints);
	struct wlr_surface *surface = client_surface(c);
	if (c == focustop(selmon))
	if (c == focustop(selmon) || !c->surface.xwayland->hints)
		return;

	c->isurgent = xcb_icccm_wm_hints_get_urgency(c->surface.xwayland->hints);


@@ 4008,19 4041,6 @@ void
xwaylandready(struct wl_listener *listener, void *data)
{
	struct wlr_xcursor *xcursor;
	xcb_connection_t *xc = xcb_connect(xwayland->display_name, NULL);
	int err = xcb_connection_has_error(xc);
	if (err) {
		fprintf(stderr, "xcb_connect to X server failed with code %d\n. Continuing with degraded functionality.\n", err);
		return;
	}

	/* Collect atoms we are interested in. If getatom returns 0, we will
	 * not detect that window type. */
	netatom[NetWMWindowTypeDialog] = getatom(xc, "_NET_WM_WINDOW_TYPE_DIALOG");
	netatom[NetWMWindowTypeSplash] = getatom(xc, "_NET_WM_WINDOW_TYPE_SPLASH");
	netatom[NetWMWindowTypeToolbar] = getatom(xc, "_NET_WM_WINDOW_TYPE_TOOLBAR");
	netatom[NetWMWindowTypeUtility] = getatom(xc, "_NET_WM_WINDOW_TYPE_UTILITY");

	/* assign the one and only seat */
	wlr_xwayland_set_seat(xwayland, seat);


@@ 4031,8 4051,6 @@ xwaylandready(struct wl_listener *listener, void *data)
				xcursor->images[0]->buffer, xcursor->images[0]->width * 4,
				xcursor->images[0]->width, xcursor->images[0]->height,
				xcursor->images[0]->hotspot_x, xcursor->images[0]->hotspot_y);

	xcb_disconnect(xc);
}
#endif


M util.c => util.c +5 -5
@@ 38,14 38,14 @@ ecalloc(size_t nmemb, size_t size)
int
fd_set_nonblock(int fd) {
	int flags = fcntl(fd, F_GETFL);
    if (flags < 0) {
	if (flags < 0) {
		perror("fcntl(F_GETFL):");
        return -1;
    }
    if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0) {
		return -1;
	}
	if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0) {
		perror("fcntl(F_SETFL):");
		return -1;
    }
	}

	return 0;
}