1 files changed, 31 insertions, 0 deletions
diff --git a/libs/libgui/msg.c b/libs/libgui/msg.c
new file mode 100644
index 0000000..73af242
--- /dev/null
+++ b/libs/libgui/msg.c
@@ -0,0 +1,31 @@
+// MIT License, Copyright (c) 2021 Marvin Borner
+
+#include <assert.h>
+#include <errno.h>
+#include <libgui/msg.h>
+#include <print.h>
+#include <sys.h>
+
+res msg_send(u32 pid, enum message_type type, void *data, u32 size)
+{
+	if (!data)
+		return -EFAULT;
+	assert((signed)pid != -1 && size >= sizeof(struct message_header));
+	char path[32] = { 0 };
+	sprintf(path, "/proc/%d/msg", pid);
+	struct message_header *header = data;
+	header->magic = MSG_MAGIC;
+	header->src = getpid();
+	header->type = type;
+	return write(path, data, 0, size);
+}
+
+res msg_receive(void *buf, u32 size)
+{
+	int ret = read("/proc/self/msg", buf, 0, size);
+	struct message_header *header = buf;
+	if (header->magic == MSG_MAGIC)
+		return ret;
+	else
+		return -1;
+}