lib: Report as many errors as possible from biowritesome.

diff --git a/lib/bufio.c b/lib/bufio.c
index fe5d005..1929d31 100644 (file)
--- a/lib/bufio.c
+++ b/lib/bufio.c
@@ -267,8 +267,14 @@ ssize_t biowritesome(struct bufio *bio, const void *data, size_t len)
     ret = min(len, bio->wbuf.s - bio->wbuf.d);
     memcpy(bio->wbuf.b + bio->wbuf.d, data, ret);
     bio->wbuf.d += ret;
-    if((bioflushsome(bio) < 0) && (ret == 0))
-       return(-1);
+    if(bioflushsome(bio) < 0) {
+       if(ret == 0)
+           return(-1);
+       if(ret < bio->wbuf.d - bio->wh) { /* Should never be false */
+           bio->wbuf.d -= ret;
+           return(-1);
+       }
+    }
     return(ret);
 }