From 045e511d74affcec36981d51a3cc9900838e35fb Mon Sep 17 00:00:00 2001
From: "K. Lange" <klange@toaruos.org>
Date: Wed, 10 Oct 2018 11:30:25 +0900
Subject: [PATCH] libc: fscanf stubs

---
 base/usr/include/stdio.h |  2 ++
 libc/stdio/scanf.c       | 23 +++++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/base/usr/include/stdio.h b/base/usr/include/stdio.h
index f5f10819..a1561f16 100644
--- a/base/usr/include/stdio.h
+++ b/base/usr/include/stdio.h
@@ -81,3 +81,5 @@ extern char * tmpnam(char * s);
 
 extern int vsscanf(const char *str, const char *format, va_list ap);
 extern int sscanf(const char *str, const char *format, ...);
+extern int vfscanf(FILE * stream, const char *format, va_list ap);
+extern int fscanf(FILE *stream, const char *format, ...);
diff --git a/libc/stdio/scanf.c b/libc/stdio/scanf.c
index 6fd77107..e88d74d1 100644
--- a/libc/stdio/scanf.c
+++ b/libc/stdio/scanf.c
@@ -22,6 +22,21 @@ int vsscanf(const char *str, const char *format, va_list ap) {
 	return 0;
 }
 
+int vfscanf(FILE * stream, const char *format, va_list ap) {
+	fprintf(stderr, "%s: fscanf(%d, format=%s, ...);\n", _argv_0, fileno(stream), format);
+	while (*format) {
+		if (*format == ' ') {
+			/* Handle whitespace */
+		} else if (*format == '%') {
+			/* Parse */
+		} else {
+			/* Expect exact character? */
+		}
+		format++;
+	}
+	return 0;
+}
+
 int sscanf(const char *str, const char *format, ...) {
 	va_list args;
 	va_start(args, format);
@@ -29,3 +44,11 @@ int sscanf(const char *str, const char *format, ...) {
 	va_end(args);
 	return out;
 }
+
+int fscanf(FILE *stream, const char *format, ...) {
+	va_list args;
+	va_start(args, format);
+	int out = vfscanf(stream, format, args);
+	va_end(args);
+	return out;
+}