1 files changed, 19 insertions, 2 deletions
diff --git a/include/unistd.h b/include/unistd.h
index 746c829..ef6d059 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -3,6 +3,11 @@
 
 #include <stdint.h>
 
+#ifndef _SSIZE_T
+#define _SSIZE_T
+typedef int32_t ssize_t;
+#endif
+
 typedef uint16_t pid_t;
 
 #define __SYS_puts      0
@@ -13,6 +18,7 @@ typedef uint16_t pid_t;
 #define __SYS_alarm     5
 #define __SYS_pause     6
 #define __SYS_ctty      7
+#define __SYS_read      8
 
 #define _syscall0(type, name) \
   type name(void) { \
@@ -21,7 +27,7 @@ typedef uint16_t pid_t;
         "int $0x80" \
         : "=a" (__res) \
         : "a" (__SYS_##name) \
-        :); \
+        ); \
     return __res; \
   }
 
@@ -32,7 +38,18 @@ typedef uint16_t pid_t;
         "int $0x80" \
         : "=a" (__res) \
         : "a" (__SYS_##name), "b" (a) \
-        :); \
+        ); \
+    return __res; \
+  }
+
+#define _syscall2(type, name, atype, a, btype, b) \
+  type name(atype a, btype b) { \
+    type __res; \
+    __asm__ volatile ( \
+        "int $0x80" \
+        : "=a" (__res) \
+        : "a" (__SYS_##name), "b" (a), "c" (b) \
+        ); \
     return __res; \
   }