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| author | Rusty Russell <rusty@rustcorp.com.au> | 2009-06-12 22:27:05 -0600 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2009-06-12 22:27:05 +0930 |
| commit | 7b5c806c35f6ff76b2e36a8b5b1513c8a83fcff7 (patch) | |
| tree | 382e194aadcae193229c121c60c0d4838255c327 /Documentation/lguest | |
| parent | e606490c440900e50ccf73a54f6fc6150ff40815 (diff) | |
| download | op-kernel-dev-7b5c806c35f6ff76b2e36a8b5b1513c8a83fcff7.zip op-kernel-dev-7b5c806c35f6ff76b2e36a8b5b1513c8a83fcff7.tar.gz | |
lguest: fix writev returning short on console output
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>
Diffstat (limited to 'Documentation/lguest')
| -rw-r--r-- | Documentation/lguest/lguest.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/Documentation/lguest/lguest.c b/Documentation/lguest/lguest.c index 8704600..02fa524 100644 --- 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); } } |
