From 62c858892193b6dc7ae7f0adefe043f094d74cb6 Mon Sep 17 00:00:00 2001
From: David Härdeman <david@hardeman.nu>
Date: Wed, 12 Aug 2015 21:05:32 +0200
Subject: Add some basic use of libevdev

---
 Makefile           |  2 +-
 rcm-server-evdev.c | 32 +++++++++++++++++++++++---------
 rcm-server-evdev.h |  2 +-
 rcm-server-main.c  |  2 +-
 rcm-server-main.h  |  1 +
 5 files changed, 27 insertions(+), 12 deletions(-)

diff --git a/Makefile b/Makefile
index e077b28..cef1614 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ EXTRA_LDFLAGS	=
 
 COMMON_HEADERS	= linux-input-keycodes.h linux-input.h shared.h
 
-RCM_PACKAGES	= libudev libsystemd
+RCM_PACKAGES	= libudev libsystemd libevdev
 RCM_CFLAGS	= ${GENERIC_CFLAGS} ${EXTRA_CFLAGS} $(shell pkg-config --cflags ${RCM_PACKAGES})
 RCM_LDFLAGS	= ${GENERIC_LDFLAGS} ${EXTRA_LDFLAGS} $(shell pkg-config --libs ${RCM_PACKAGES})
 RCM_COMPILE	= $(CC) $(RCM_CFLAGS)
diff --git a/rcm-server-evdev.c b/rcm-server-evdev.c
index 74cae10..afd89f7 100644
--- a/rcm-server-evdev.c
+++ b/rcm-server-evdev.c
@@ -9,6 +9,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+#include <libevdev/libevdev.h>
 
 #include "utils.h"
 #include "shared.h"
@@ -150,6 +151,7 @@ evdev_read(sd_event_source *s, int fd, uint32_t revents, void *userdata)
 	static uint32_t scancode;
 	static bool scancode_recv = false;
 	unsigned i;
+	int r;
 
 	if (fd != device->evdev_fd)
 		fprintf(stderr, "evdev fd mismatch: %i != %i\n", device->evdev_fd, fd);
@@ -166,7 +168,16 @@ evdev_read(sd_event_source *s, int fd, uint32_t revents, void *userdata)
 		return 0;
 	}
 
-	while (read(fd, &ev, sizeof(ev)) == sizeof(ev)) {
+	do {
+		r = libevdev_next_event(device->evdev_dev, LIBEVDEV_READ_FLAG_NORMAL, &ev);
+		if (r != LIBEVDEV_READ_STATUS_SUCCESS)
+			continue;
+
+		printf("Event: %s %s %d\n",
+		       libevdev_event_type_get_name(ev.type),
+		       libevdev_event_code_get_name(ev.type, ev.code),
+		       ev.value);
+
 		switch (ev.type) {
 		case EV_KEY:
 			if (keycode)
@@ -242,13 +253,14 @@ evdev_read(sd_event_source *s, int fd, uint32_t revents, void *userdata)
 		default:
 			break;
 		}
-	}
+
+	} while (r == LIBEVDEV_READ_STATUS_SUCCESS || r == LIBEVDEV_READ_STATUS_SYNC);
 
 	return 0;
 }
 
 int
-evdev_setup(struct manager *mgr, struct device *device, const char *path)
+evdev_setup(struct device *device, const char *path)
 {
 	int r;
 	struct keymap *keymap;
@@ -262,13 +274,15 @@ evdev_setup(struct manager *mgr, struct device *device, const char *path)
 	}
 
 	device->evdev_fd = open(path, O_RDONLY | O_NONBLOCK);
-	if (device->evdev_fd < 0) {
-		printf("Failed to open evdev device %s: %s\n",
-		       path, strerror(errno));
-		return -errno;
+	r = libevdev_new_from_fd(device->evdev_fd, &device->evdev_dev);
+	if (r < 0) {
+		printf("Failed to open evdev device %s: %s\n", path, strerror(-r));
+		close(device->evdev_fd);
+		return r;
 	}
 
-	printf("Performing evdev setup for device %s\n", device->path);
+	printf("Performing evdev setup for device %s (%s)\n",
+	       device->path, libevdev_get_name(device->evdev_dev));
 	r = evdev_clear_keymap(device);
 	if (r < 0)
 		return r;
@@ -276,7 +290,7 @@ evdev_setup(struct manager *mgr, struct device *device, const char *path)
 	list_for_each_entry(keymap, &device->keymaps, list)
 		r = evdev_set_keymap(device, keymap);
 
-	if (sd_event_add_io(mgr->event, &device->evdev_ev,
+	if (sd_event_add_io(device->mgr->event, &device->evdev_ev,
 			    device->evdev_fd, EPOLLIN, evdev_read, device) < 0) {
 		printf("Failed to add event source for evdev device %s: %s\n",
 		       path, strerror(errno));
diff --git a/rcm-server-evdev.h b/rcm-server-evdev.h
index ed0942a..2a38852 100644
--- a/rcm-server-evdev.h
+++ b/rcm-server-evdev.h
@@ -1,7 +1,7 @@
 #ifndef foorcmserverevdevhfoo
 #define foorcmserverevdevhfoo
 
-int evdev_setup(struct manager *mgr, struct device *device, const char *path);
+int evdev_setup(struct device *device, const char *path);
 
 #endif
 
diff --git a/rcm-server-main.c b/rcm-server-main.c
index 7fc6e85..bd48c80 100644
--- a/rcm-server-main.c
+++ b/rcm-server-main.c
@@ -742,7 +742,7 @@ add_device(struct manager *mgr, struct udev_device *udev)
 			continue;
 		}
 
-		r = evdev_setup(mgr, device, devnode);
+		r = evdev_setup(device, devnode);
 		if (r < 0) {
 			printf("Failed to setup evdev: %s\n", devnode);
 			udev_device_unref(evdev);
diff --git a/rcm-server-main.h b/rcm-server-main.h
index 4455ad8..5124d84 100644
--- a/rcm-server-main.h
+++ b/rcm-server-main.h
@@ -8,6 +8,7 @@ struct device {
 	char *keymap_name;
 	int evdev_fd;
 	sd_event_source *evdev_ev;
+	struct libevdev *evdev_dev;
 	struct manager *mgr;
 	struct list_head list;
 	struct list_head keymaps;
-- 
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