1 files changed, 13 insertions, 1 deletions
diff --git a/src/libc/include/unistd.h b/src/libc/include/unistd.h
index ec4fc13..dcf0336 100644
--- a/src/libc/include/unistd.h
+++ b/src/libc/include/unistd.h
@@ -19,8 +19,20 @@
 #ifndef _UNISTD_H
 #define _UNISTD_H
 
+#include <stddef.h>
 #include <stdint.h>
+#include <sys/types.h>
 
-void *sbrk(intptr_t increment);
+enum
+{
+    STDIN_FILENO,
+    STDOUT_FILENO,
+    STDERR_FILENO
+};
+
+void *sbrk(intptr_t __increment);
+ssize_t read(int __fd, void *__buf, size_t __n);
+ssize_t write(int __fd, const void *__buf, size_t __n);
+int close(int __fd);
 
 #endif