1 files changed, 17 insertions, 1 deletions
diff --git a/src/stdio/__stdio_read.c b/src/stdio/__stdio_read.c
index d9bb3269..a2e4cd62 100644
--- a/src/stdio/__stdio_read.c
+++ b/src/stdio/__stdio_read.c
@@ -2,5 +2,21 @@
 
 size_t __stdio_read(FILE *f, unsigned char *buf, size_t len)
 {
-	return syscall(SYS_read, f->fd, buf, len);
+	struct iovec iov[2] = {
+		{ .iov_base = buf, .iov_len = len },
+		{ .iov_base = f->buf, .iov_len = f->buf_size }
+	};
+	ssize_t cnt;
+
+	cnt = syscall(SYS_readv, f->fd, iov, 2);
+	if (cnt <= 0) {
+		f->flags |= F_EOF ^ ((F_ERR^F_EOF) & cnt);
+		f->rpos = f->rend = 0;
+		return cnt;
+	}
+	if (cnt <= len) return cnt;
+	cnt -= len;
+	f->rpos = f->buf;
+	f->rend = f->buf + cnt;
+	return len;
 }