user/libc: properly implement snprintf; the v*printf family

1 files changed, 8 insertions, 2 deletions

diff --git a/src/user/lib/include/stdio.h b/src/user/lib/include/stdio.h
index bf9e09e..fe754da 100644
--- a/src/user/lib/include/stdio.h
+++ b/src/user/lib/include/stdio.h
@@ -1,5 +1,6 @@
 #pragma once
 #include <bits/file.h>
+#include <stdarg.h>
 #include <stddef.h>
 
 #define EOF (-1)
@@ -8,8 +9,13 @@
 #define SEEK_CUR 2
 #define SEEK_END 3
 
-int printf(const char *fmt, ...);
-int snprintf(char *str, size_t len, const char *fmt, ...);
+int printf(const char *restrict fmt, ...);
+int fprintf(FILE *restrict f, const char *restrict fmt, ...);
+int snprintf(char *restrict str, size_t len, const char *restrict fmt, ...);
+
+int vprintf(const char *restrict fmt, va_list ap);
+int vfprintf(FILE *restrict f, const char *restrict fmt, va_list ap);
+int vsnprintf(char *restrict str, size_t len, const char *restrict fmt, va_list ap);
 
 int _klogf(const char *fmt, ...); // for kernel debugging only