1 files changed, 24 insertions, 0 deletions
diff --git a/system/lib/libc/musl/src/stdio/__toread.c b/system/lib/libc/musl/src/stdio/__toread.c
new file mode 100644
index 00000000..2e804f64
--- /dev/null
+++ b/system/lib/libc/musl/src/stdio/__toread.c
@@ -0,0 +1,24 @@
+#include <stdio_impl.h>
+
+int __toread(FILE *f)
+{
+	f->mode |= f->mode-1;
+	if (f->wpos > f->buf) f->write(f, 0, 0);
+	f->wpos = f->wbase = f->wend = 0;
+	if (f->flags & (F_EOF|F_NORD)) {
+		if (f->flags & F_NORD) f->flags |= F_ERR;
+		return EOF;
+	}
+	f->rpos = f->rend = f->buf;
+	return 0;
+}
+
+static const int dummy = 0;
+weak_alias(dummy, __towrite_used);
+
+void __stdio_exit(void);
+
+void __seek_on_exit()
+{
+	if (!__towrite_used) __stdio_exit();
+}