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	Add key state plugin with caps lock as example - spoon - set dwm status
	git clone git://git.codemadness.org/spoon
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	---
	commit 26f4036b31ba4d4b96fb8f103fdc30a897438e46
	parent cbac9231f348a7b018dfc6ac175cf6c3c78ae872
	Author: lostd <[email protected]>
	Date: Thu, 6 Apr 2017 10:05:53 +0300

	Add key state plugin with caps lock as example

	Diffstat:
	M Makefile \| 4 ++--
	M config.def.h \| 1 +
	A key.c \| 50 +++++++++++++++++++++++++++++…
	M spoon.c \| 2 ++
	M stub.c \| 7 +++++++
	M types.h \| 6 ++++++

	6 files changed, 68 insertions(+), 2 deletions(-)
	---
	diff --git a/Makefile b/Makefile
	@@ -1,8 +1,8 @@
	VERSION = 0.3
	PREFIX = /usr/local
	-SRC = spoon.c batt.c wifi.c cpu.c temp.c date.c load.c file.c\
	+SRC = spoon.c batt.c wifi.c cpu.c temp.c date.c load.c file.c key.c\
	strlcpy.c strlcat.c stub.c mix.c xkblayout.c mpd.c
	-OBJ = spoon.o batt.o wifi.o cpu.o temp.o date.o load.o file.o\
	+OBJ = spoon.o batt.o wifi.o cpu.o temp.o date.o load.o file.o key.o\
	strlcpy.o strlcat.o stub.o
	BIN = spoon
	DISTFILES = $(SRC) types.h util.h config.def.h Makefile LICENSE configure
	diff --git a/config.def.h b/config.def.h
	@@ -11,6 +11,7 @@ struct ent ents[] = {
	{ .fmt = "%s ", .read = battread, .arg = NULL },
	{ .fmt = "%s ", .read = wifiread, .arg = NULL },
	{ .fmt = "[%s] ", .read = xkblayoutread, .arg = NULL },
	+ { .fmt = "%s", .read = keyread, .arg = &(struct …
	{ .fmt = "%s ", .read = fileread, .arg = "/etc/m…
	{ .fmt = "%s", .read = dateread, .arg = (char []…
	};
	diff --git a/key.c b/key.c
	@@ -0,0 +1,50 @@
	+#include <err.h>
	+#include <stdio.h>
	+
	+#include <X11/keysym.h>
	+#include <X11/Xlib.h>
	+
	+#include "types.h"
	+#include "util.h"
	+
	+int
	+keyread(void arg, char buf, size_t len)
	+{
	+ static Display *dpy = NULL;
	+ XModifierKeymap *map;
	+ KeyCode keycode;
	+ Window w1, w2;
	+ int i1, i2, i3, i4;
	+ int modmask;
	+ int keymask;
	+ struct keyarg *key = arg;
	+ int on;
	+ int i;
	+
	+ if (dpy == NULL) {
	+ dpy = XOpenDisplay(NULL);
	+ if (dpy == NULL) {
	+ warnx("cannot open display");
	+ return -1;
	+ }
	+ }
	+ keycode = XKeysymToKeycode(dpy, key->sym);
	+ if (keycode == NoSymbol) {
	+ warnx("no key code for this symbol");
	+ return -1;
	+ }
	+ map = XGetModifierMapping(dpy);
	+ for (i = 0; i < 8; i++)
	+ if (map->modifiermap[map->max_keypermod * i] == keycode)
	+ keymask = 1 << i;
	+ XFreeModifiermap(map);
	+ XQueryPointer(dpy, DefaultRootWindow(dpy),
	+ &w1, &w2, &i1, &i2, &i3, &i4, &modmask);
	+ on = (keymask & modmask) != 0;
	+ DPRINTF_D(on);
	+ if (on)
	+ snprintf(buf, len, "%s", key->on);
	+ else
	+ snprintf(buf, len, "%s", key->off);
	+ return 0;
	+}
	diff --git a/spoon.c b/spoon.c
	@@ -3,6 +3,7 @@
	#include <stdio.h>
	#include <unistd.h>

	+#include <X11/keysym.h>
	#include <X11/Xlib.h>

	#include "util.h"
	@@ -18,6 +19,7 @@ int tempread(void , char , size_t);
	int wifiread(void , char , size_t);
	int xkblayoutread(void , char , size_t);
	int fileread(void , char , size_t);
	+int keyread(void , char , size_t);

	struct ent {
	char *fmt;
	diff --git a/stub.c b/stub.c
	@@ -55,3 +55,10 @@ fileread(void arg, char buf, size_t len)
	{
	return -1;
	}
	+
	+#pragma weak keyread
	+int
	+keyread(void arg, char buf, size_t len)
	+{
	+ return -1;
	+}
	diff --git a/types.h b/types.h
	@@ -2,3 +2,9 @@ struct mpdarg {
	char *host;
	unsigned int port;
	};
	+
	+struct keyarg {
	+ int sym;
	+ char *on;
	+ char *off;
	+};