kern: add snprintf

* kern/printf.c (snprintf): New function.
* kern/printf.h (snprintf): New declaration.

2 files changed, 11 insertions, 0 deletions

diff --git a/kern/printf.c b/kern/printf.c
index af59d5a..ea78d48 100644
--- a/kern/printf.c
+++ b/kern/printf.c
@@ -615,6 +615,16 @@ vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
   return cookie.index;
 }
 
+int
+snprintf(char *buf, size_t size, const char *fmt, ...)
+{
+	int written;
+	va_list	listp;
+	va_start(listp, fmt);
+	written = vsnprintf(buf, size, fmt, listp);
+	va_end(listp);
+	return written;
+}
 
 void safe_gets(str, maxlen)
 	char *str;
diff --git a/kern/printf.h b/kern/printf.h
index 8b4e760..0f8b328 100644
--- a/kern/printf.h
+++ b/kern/printf.h
@@ -40,6 +40,7 @@ extern void printnum (unsigned long u, int base,
                       vm_offset_t putc_arg);
 
 extern int sprintf (char *buf, const char *fmt, ...);
+extern int snprintf (char *buf, size_t size, const char *fmt, ...);
 extern int vsnprintf (char *buf, size_t size, const char *fmt, va_list args);
 
 extern int printf (const char *fmt, ...);