From 9400716f56057d9f2fcd7f7ad033dfcb131105a2 Mon Sep 17 00:00:00 2001
From: Jake Mannens <jake72360@gmail.com>
Date: Wed, 25 Jul 2018 17:18:18 +1000
Subject: Added missing prototype for puts() in stdio.h.

Implemented a basic serial interface using COM0 which can be accessed
with the system call sys_puts as well as the library functions rsputs()
and rsprintf().

Renamed puts() in con.c to con_puts() and made the function static to
avoid interference with the library function puts().
---
 include/kernel/con.h | 2 +-
 include/kernel/sys.h | 3 ++-
 include/stdio.h      | 4 ++++
 include/unistd.h     | 1 +
 4 files changed, 8 insertions(+), 2 deletions(-)

(limited to 'include')

diff --git a/include/kernel/con.h b/include/kernel/con.h
index 178a0d3..9dd9dbe 100644
--- a/include/kernel/con.h
+++ b/include/kernel/con.h
@@ -1,7 +1,7 @@
 /*
  * con.h
  *
- * Basic VGA text console. Implements printk() and puts().
+ * Basic VGA text console. Implements printk().
  */
 
 #ifndef _CON_H
diff --git a/include/kernel/sys.h b/include/kernel/sys.h
index b2c1b3b..2ec4490 100644
--- a/include/kernel/sys.h
+++ b/include/kernel/sys.h
@@ -5,6 +5,7 @@ extern int sys_time(void);
 extern int sys_getpid(void);
 extern int sys_getpdir(void);
 extern int sys_signal(void);
+extern int sys_rsputs(void);
 extern int sys_dummy(void);
 
 syscall_t call_table[256] = {
@@ -13,7 +14,7 @@ syscall_t call_table[256] = {
   [2] = &sys_getpid,
   [3] = &sys_getpdir,
   [4] = &sys_signal,
-  [5] = &sys_dummy,
+  [5] = &sys_rsputs,
   [6] = &sys_dummy,
   [7] = &sys_dummy,
   [8] = &sys_dummy,
diff --git a/include/stdio.h b/include/stdio.h
index d37699a..94cf227 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -3,7 +3,11 @@
 
 #include <stdarg.h>
 
+int puts(char*);
+int rsputs(char*);
+
 int printf(char*, ...);
+int rsprintf(char*, ...);
 
 int vsprintf(char*, char*, va_list);
 
diff --git a/include/unistd.h b/include/unistd.h
index 3b144f6..a784e22 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -10,6 +10,7 @@ typedef uint16_t pid_t;
 #define __SYS_getpid    2
 #define __SYS_getpdir   3
 #define __SYS_signal    4
+#define __SYS_rsputs    5
 
 #define _syscall0(type, name) \
   type name(void) { \
-- 
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