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-rw-r--r--io.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/io.c b/io.c
index a4afeaf..8a5d6ab 100644
--- a/io.c
+++ b/io.c
@@ -1637,12 +1637,16 @@ io_writev(int argc, VALUE *argv, VALUE io)
for (i = 0; i < argc; i += cnt) {
#ifdef HAVE_WRITEV
- if ((cnt = argc - i) >= IOV_MAX) cnt = IOV_MAX-1;
- n = io_fwritev(cnt, &argv[i], fptr);
-#else
- /* sync at last item */
- n = io_fwrite(argv[i], fptr, (i < argc-1));
+ if ((fptr->mode & (FMODE_SYNC|FMODE_TTY)) && ((cnt = argc - i) < IOV_MAX)) {
+ n = io_fwritev(cnt, &argv[i], fptr);
+ }
+ else
#endif
+ {
+ cnt = 1;
+ /* sync at last item */
+ n = io_fwrite(rb_obj_as_string(argv[i]), fptr, (i < argc-1));
+ }
if (n == -1L) rb_sys_fail_path(fptr->pathv);
total = rb_fix_plus(LONG2FIX(n), total);
}