Can't remember if I ended up using this

gpu_monitor.c

@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <dirent.h>
+#define INVALID -128
+
+int read_int(char* filename) {
+	printf("Reading filename %s\n", filename);
+	int output = INVALID;
+	FILE* pInput = fopen(filename, "r");
+	if (pInput != NULL) {
+		fscanf(pInput, "%d", &output);
+		fclose(pInput);
+	} else printf("No such file\n");
+	return output;
+}
+
+int main() {
+	FILE* pOutput;
+	FILE* pInput;
+	char filename[] = "/sys/class/drm/card?/device/gpu_busy_percent";  // ? is filename[19], overwrite each loop
+	char hwmon_dirname[] = "/sys/class/drm/card?/device/hwmon";  // ? is hwmon_dirname[19], overwrite each loop
+	for (int i = 0; i < 8; i++) {
+		int usage = 0;
+		int temperature = 0;
+		char sOutput[16];
+		filename[19] = i + 48;
+		hwmon_dirname[19] = i + 48;
+
+		usage = read_int(filename);
+		if (usage == INVALID) break;
+
+		DIR* folder = opendir(hwmon_dirname);
+		if (folder == NULL) break;
+		closedir(folder);
+
+		char filename2[] = "/sys/class/drm/card0/device/hwmon/hwmon*/temp1_input";
+		filename2[19] = i + 48;
+		temperature = read_int(filename2);
+		if (temperature == INVALID) break;
+
+		// sprintf(sOutput, "%3d% %3d℃", usage, temperature);
+		printf("%3d% %3d℃", usage, temperature);
+	}
+	return 0;
+}