Initial buggy overhaul

1 files changed, 147 insertions, 0 deletions

diff --git a/brightnessd.c b/brightnessd.c
new file mode 100644
index 0000000..f262d56
--- /dev/null
+++ b/brightnessd.c
@@ -0,0 +1,147 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <poll.h>
+
+#define FIFO_PATH   "/tmp/brightnessd-fifo"
+#define BRIGHT_FILE	"/sys/class/backlight/radeon_bl0/brightness"
+#define DELAY		1*5
+#define STEP		1
+#define BIG_STEP	5
+
+
+void get_now();
+
+/****************************************************************
+ * Write something useful here for once
+ */
+volatile unsigned char target; // int because overflow checky checky woo yay blah
+volatile unsigned char now;
+FILE *f;
+
+
+unsigned char brightness_within_bounds(int bright, int lower, int upper)
+{
+	// to do: make a horrible but funny ternary statement
+	if (bright < lower)
+		return lower;
+
+	if (bright > upper)
+		return upper;
+
+	return bright;
+}
+
+int main(int argc, char **argv)
+{
+	char buffer[4]; /* size 4 because max bright is 255, plus null terminator */
+
+	// Open brightness file
+	if ((f = fopen(BRIGHT_FILE, "w+")) == NULL)
+	{
+		perror("fopen");
+		exit(EXIT_FAILURE);
+	}
+
+	get_now();
+	target = now;
+
+	// Open a FIFO
+	remove(FIFO_PATH);
+	mkfifo(FIFO_PATH, 0666);
+	chmod(FIFO_PATH, 0666);
+
+	// FIXME : check return val
+	int fifo = open(FIFO_PATH, O_RDWR);
+	FILE *fifo_k = fopen(FIFO_PATH, "w");
+
+	struct pollfd fds[1];
+
+	fds[0].fd = fifo;
+	fds[0].events = POLLIN;
+
+	int delay = -1;
+
+	while(1)
+	{
+		printf("polling, %d ====> %d\n", now, target);
+		poll(fds, 1, delay);
+		if (fds[0].revents & POLLIN)
+		{
+			printf("polling wooorked\n");
+			delay = DELAY;
+			read(fifo, buffer, sizeof(buffer));
+			printf("%s",buffer);
+			switch(buffer[0])
+			{
+				case '+':
+					printf("UP!\n");
+					target += BIG_STEP;
+					break;
+				case '-':
+					printf("DOWN\n");
+					target -= BIG_STEP;
+					break;
+				default:
+					target = atoi(buffer);
+					printf("FOO %d\n", target);
+					break;
+			}
+			target = brightness_within_bounds(target, 1, 255);
+		}
+		if (now < target)
+			now += STEP;
+		else if (now > target)
+			now -= STEP;
+		else if (now == target)
+			delay = -1;
+
+		fprintf(f, "%d\n", now);
+		rewind(f);
+	}
+
+	// Do I need this?
+	close(fifo);
+	remove(FIFO_PATH);
+	return 0;
+}
+
+
+void get_now()
+{
+	char buffer[4096]; // to do: magic constant is icky
+	// to do check return value for eror
+	fgets(buffer, sizeof(buffer), f);
+
+	now = atoi(buffer);
+}
+
+void brightness_thread()
+{
+	char buffer[4096]; // to do: magic constant is icky
+
+	while(1)
+	{
+		// Wait for the target to be different from the current brightness
+		while (now == target)
+			usleep(DELAY*50);
+
+		// Adjust the brightness to match target
+		while(now != target)
+		{
+			if (now > target)
+				now -= STEP;
+
+			if (now < target)
+				now += STEP;
+
+			fprintf(f, "%d\n", now);
+			rewind(f);
+			usleep(DELAY);
+		}
+	}
+}