Simple IPC with pipes

ulib/system/ipcpipe.c

@@ -0,0 +1,10 @@
+#include <stdint.h>
+#include <stddef.h>
+#include "ipcpipe.h"
+#include <sysdefs/ipcpipe.h>
+#include <sysdefs/syscall.h>
+#include <syscall/syscall.h>
+
+int32_t ipcpipe(uint64_t pid, uint64_t pipenum, uint64_t cmd, uint8_t *buffer, size_t len) {
+  return syscall(SYS_IPCPIPE, pid, pipenum, cmd, (uint64_t)buffer, (uint64_t)len, 0);
+}