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().

1 files changed, 3 insertions, 3 deletions

diff --git a/kernel/con.c b/kernel/con.c
index c8be80b..2000fbc 100644
--- a/kernel/con.c
+++ b/kernel/con.c
@@ -1,7 +1,7 @@
 /*
  * con.c
  *
- * Basic VGA text console. Implements printk() and puts().
+ * Basic VGA text console. Implements printk().
  */
 
 #include <asm/io.h>
@@ -64,7 +64,7 @@ void con_init(void) {
 }
 
 /* write a zero-terminated string to console */
-static int puts(char *s) {
+static int con_puts(char *s) {
   uint8_t *p = &vram[pos];
 
   while(*s) {
@@ -100,6 +100,6 @@ int printk(char *fmt, ...) {
   ret = vsprintf(buf, fmt, ap);
   va_end(ap);
 
-  puts(buf);
+  con_puts(buf);
   return ret;
 }