major stdio overhaul, using readv/writev, plus other changes

[musl] / src / stdio / __towrite.c

diff --git a/src/stdio/__towrite.c b/src/stdio/__towrite.c
new file mode 100644 (file)
index 0000000..b458741
--- /dev/null
+++ b/src/stdio/__towrite.c
@@ -0,0 +1,21 @@
+#include "stdio_impl.h"
+
+int __towrite(FILE *f)
+{
+       f->mode |= f->mode-1;
+       if (f->flags & (F_NOWR)) {
+               f->flags |= F_ERR;
+               return EOF;
+       }
+       /* Clear read buffer (easier than summoning nasal demons) */
+       f->rpos = f->rend = 0;
+
+       /* Activate write through the buffer. */
+       f->wpos = f->wbase = f->buf;
+       f->wend = f->buf + f->buf_size;
+
+       return 0;
+}
+
+/* Link flush-on-exit code iff any stdio write functions are linked. */
+int (*const __fflush_on_exit)(FILE *) = fflush;