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lguest: fix writev returning short on console output

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I've never seen it here, but I can't find anywhere that says writev
will write everything.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2009-06-12 22:27:05 -06:00
parent e606490c44
commit 7b5c806c35
1 changed files with 6 additions and 1 deletions
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7
Documentation/lguest/lguest.c
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@ -836,7 +836,12 @@ static void handle_console_output(struct virtqueue *vq, bool timeout)
while ((head = get_vq_desc(vq, iov, &out, &in)) != vq->vring.num) {
if (in)
errx(1, "Input buffers in output queue?");
writev(STDOUT_FILENO, iov, out);
while (!iov_empty(iov, out)) {
int len = writev(STDOUT_FILENO, iov, out);
if (len <= 0)
err(1, "Write to stdout gave %i", len);
iov_consume(iov, out, len);
}
add_used_and_trigger(vq, head, 0);
}
}