initial (partial) commit

src/keymon/credits.txt

@@ -0,0 +1,3 @@
+based on eggs custom keymon for Trimui: 
+	https://www.dropbox.com/sh/5e9xwvp672vt8cr/AABUIdw1vLYp9h0waoCUqHPOa/source?dl=0&subfolder_nav_tracking=1
+modified to use libmsettings

src/keymon/keymon.c

@@ -0,0 +1,143 @@
+// miyoomini/keymon.c
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <string.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <linux/input.h>
+
+#include <msettings.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <pthread.h>
+
+#include "defines.h"
+
+//	for ev.value
+#define RELEASED	0
+#define PRESSED		1
+#define REPEAT		2
+
+#define INPUT_COUNT 2
+static int inputs[INPUT_COUNT];
+static struct input_event ev;
+static int jack_fd;
+static pthread_t jack_pt;
+
+// TODO: HDMI?
+
+#define JACK_STATE_PATH "/sys/class/switch/h2w/state"
+#define HDMI_STATE_PATH "/sys/class/switch/hdmi/state"
+
+static void* watchJack(void *arg) {
+	uint32_t has_headphones;
+	uint32_t had_headphones;
+	
+	FILE *file = fopen(JACK_STATE_PATH, "r");
+	fscanf(file, "%i", &has_headphones);
+	had_headphones = has_headphones;
+	SetJack(has_headphones);
+	
+	while(1) {
+		sleep(1);
+		rewind(file);
+		fscanf(file, "%i", &has_headphones);
+		if (had_headphones!=has_headphones) {
+			had_headphones = has_headphones;
+			SetJack(has_headphones);
+		}
+	}
+	return 0;
+}
+
+int main (int argc, char *argv[]) {
+	InitSettings();
+	pthread_create(&jack_pt, NULL, &watchJack, NULL);
+	
+	char path[32];
+	for (int i=0; i<INPUT_COUNT; i++) {
+		sprintf(path, "/dev/input/event%i", i);
+		inputs[i] = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC);
+	}
+	
+	register uint32_t input;
+	register uint32_t val;
+	register uint32_t menu_pressed = 0;
+	register uint32_t power_pressed = 0;
+	uint32_t repeat_volume = 0;
+	
+	// TODO: enable key repeat (not supported natively)
+	while (1) {
+		for (int i=0; i<INPUT_COUNT; i++) {
+			input = inputs[i];
+			while(read(input, &ev, sizeof(ev))==sizeof(ev)) {
+				val = ev.value;
+				if (( ev.type != EV_KEY ) || ( val > REPEAT )) continue;
+				switch (ev.code) {
+					case CODE_MENU:
+						if ( val != REPEAT ) menu_pressed = val;
+						break;
+					case CODE_POWER:
+						if ( val != REPEAT ) power_pressed = val;
+						break;
+					case CODE_VOL_DN:
+						if ( val == REPEAT ) {
+							// Adjust repeat speed to 1/2
+							val = repeat_volume;
+							repeat_volume ^= PRESSED;
+						} else {
+							repeat_volume = 0;
+						}
+						if ( val == PRESSED ) {
+							if (menu_pressed) {
+								val = GetBrightness();
+								if (val>BRIGHTNESS_MIN) SetBrightness(--val);
+							}
+							else {
+								val = GetVolume();
+								if (val>VOLUME_MIN) SetVolume(--val);
+							}
+						}
+						break;
+					case CODE_VOL_UP:
+						if ( val == REPEAT ) {
+							// Adjust repeat speed to 1/2
+							val = repeat_volume;
+							repeat_volume ^= PRESSED;
+						} else {
+							repeat_volume = 0;
+						}
+						if ( val == PRESSED ) {
+							if (menu_pressed) {
+								val = GetBrightness();
+								if (val<BRIGHTNESS_MAX) SetBrightness(++val);
+							}
+							else {
+								val = GetVolume();
+								if (val<VOLUME_MAX) SetVolume(++val);
+							}
+						}
+						break;
+					default:
+						break;
+				}
+				
+				// TODO: not necessary, has reset button
+				// but the system call will be good for long-press shutdown
+				// if (menu_pressed && power_pressed) {
+				// 	menu_pressed = power_pressed = 0;
+				// 	// NOTE: we don't have access to a working reboot inside chroot
+				// 	// so use /proc/sysrq-trigger to (s)ync, (u)nmount, and then power (o)ff
+				// 	system("echo s > /proc/sysrq-trigger; echo u > /proc/sysrq-trigger; echo o > /proc/sysrq-trigger");
+				// 	while (1) pause();
+				// }
+			}
+		}
+		usleep(16666); // 60fps
+	}
+}

src/keymon/makefile

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+ifeq (,$(CROSS_COMPILE))
+$(error missing CROSS_COMPILE for this toolchain)
+endif
+
+TARGET = keymon.elf
+
+CC = $(CROSS_COMPILE)gcc
+CFLAGS	= -Os -lmsettings -lpthread -lrt -ldl -Wl,--gc-sections -s
+CFLAGS  += -I. -I../common -DPLATFORM=\"$(UNION_PLATFORM)\"
+
+all:
+	$(CC) keymon.c -o $(TARGET) $(CFLAGS)
+clean:
+	rm -rf $(TARGET)