1 files changed, 19 insertions, 3 deletions
diff --git a/user/printf.c b/user/printf.c
index f3b3282..5c5c782 100644
--- a/user/printf.c
+++ b/user/printf.c
@@ -49,13 +49,11 @@ printptr(int fd, uint64 x) {
 
 // Print to the given fd. Only understands %d, %x, %p, %s.
 void
-printf(int fd, const char *fmt, ...)
+vprintf(int fd, const char *fmt, va_list ap)
 {
-  va_list ap;
   char *s;
   int c, i, state;
 
-  va_start(ap, fmt);
   state = 0;
   for(i = 0; fmt[i]; i++){
     c = fmt[i] & 0xff;
@@ -95,3 +93,21 @@ printf(int fd, const char *fmt, ...)
     }
   }
 }
+
+void
+fprintf(int fd, const char *fmt, ...)
+{
+  va_list ap;
+
+  va_start(ap, fmt);
+  vprintf(fd, fmt, ap);
+}
+
+void
+printf(const char *fmt, ...)
+{
+  va_list ap;
+
+  va_start(ap, fmt);
+  vprintf(1, fmt, ap);
+}