pseudodevices: initial null, zero and full implementations

src/sys/pseudodevs/zero.c

@@ -0,0 +1,28 @@
+#include <kernel/devman.h>
+#include <errno.h>
+#include <string.h>
+#include <arch/panic.h>
+
+static int read(int* error, int minor, void* buff, size_t count, size_t offset){
+	*error = 0;
+	memset(buff, 0, count);
+	return count;
+}
+static int write(int* error, int minor, void* buff, size_t count, size_t offset){
+	*error = 0;
+	return count;
+}
+
+static int isatty(int minor){
+	return ENOTTY;
+}
+
+static devcalls calls = {
+	read, write, isatty
+};
+
+void zerodev_init(){
+	if(devman_newdevice("zero", TYPE_CHARDEV, MAJOR_ZERO, 0, &calls)){
+		_panic("/dev/zero init failed", NULL);
+	}
+}