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lguest: fix writev returning short on console output
author
Rusty Russell
<rusty@rustcorp.com.au>
Sat, 13 Jun 2009 04:27:05 +0000
(22:27 -0600)
committer
Rusty Russell
<rusty@rustcorp.com.au>
Fri, 12 Jun 2009 12:57:05 +0000
(22:27 +0930)
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>
Documentation/lguest/lguest.c
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diff --git
a/Documentation/lguest/lguest.c
b/Documentation/lguest/lguest.c
index
8704600
..
02fa524
100644
(file)
--- a/
Documentation/lguest/lguest.c
+++ b/
Documentation/lguest/lguest.c
@@
-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);
}
}