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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 25 Jul 2019 15:30:47 +0100 Received: from b03ledav005.gho.boulder.ibm.com (b03ledav005.gho.boulder.ibm.com [9.17.130.236]) by b03cxnp08027.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x6PEUkZT56951088 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 25 Jul 2019 14:30:46 GMT Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7DE27BE04F; Thu, 25 Jul 2019 14:30:46 +0000 (GMT) Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 241EABE059; Thu, 25 Jul 2019 14:30:46 +0000 (GMT) Received: from sbct-3.pok.ibm.com (unknown [9.47.158.153]) by b03ledav005.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 25 Jul 2019 14:30:46 +0000 (GMT) From: Stefan Berger To: libvir-list@redhat.com Date: Thu, 25 Jul 2019 10:30:26 -0400 In-Reply-To: <20190725143033.1176271-1-stefanb@linux.vnet.ibm.com> References: <20190725143033.1176271-1-stefanb@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19072514-0004-0000-0000-0000152E913B X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00011491; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000287; SDB=6.01237265; UDB=6.00652184; IPR=6.01018639; MB=3.00027885; MTD=3.00000008; XFM=3.00000015; UTC=2019-07-25 14:30:49 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19072514-0005-0000-0000-00008C9B2875 Message-Id: <20190725143033.1176271-13-stefanb@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-07-25_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=900 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1907250169 X-Greylist: Sender passed SPF test, Sender IP whitelisted by DNSRBL, ACL 238 matched, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Thu, 25 Jul 2019 14:30:53 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Thu, 25 Jul 2019 14:30:53 +0000 (UTC) for IP:'148.163.158.5' DOMAIN:'mx0b-001b2d01.pphosted.com' HELO:'mx0a-001b2d01.pphosted.com' FROM:'stefanb@linux.vnet.ibm.com' RCPT:'' X-RedHat-Spam-Score: -0.698 (RCVD_IN_DNSWL_LOW, SPF_HELO_NONE, SPF_NONE) 148.163.158.5 mx0b-001b2d01.pphosted.com 148.163.158.5 mx0b-001b2d01.pphosted.com X-Scanned-By: MIMEDefang 2.83 on 10.5.110.25 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-loop: libvir-list@redhat.com Cc: marcandre.lureau@redhat.com, Stefan Berger Subject: [libvirt] [PATCH v6 12/19] utils: Mark inpipe as non-blocking X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.44]); Thu, 25 Jul 2019 14:31:07 +0000 (UTC) Mark a virCommand's inpipe (write-end of pipe) as non-blocking so that it will never block when we were to try to write too many bytes to it while it doesn't have the capacity to hold them. Signed-off-by: Stefan Berger Reviewed-by: Daniel P. Berrang=C3=A9 --- src/util/vircommand.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/src/util/vircommand.c b/src/util/vircommand.c index 8bbaced721..d63990b53a 100644 --- a/src/util/vircommand.c +++ b/src/util/vircommand.c @@ -2520,6 +2520,13 @@ virCommandRunAsync(virCommandPtr cmd, pid_t *pid) } cmd->infd =3D infd[0]; cmd->inpipe =3D infd[1]; + if (fcntl(cmd->inpipe, F_SETFL, O_NONBLOCK) < 0) { + virReportSystemError(errno, "%s", + _("fcntl failed to set O_NONBLOCK")); + cmd->has_error =3D -1; + ret =3D -1; + goto cleanup; + } } else if ((cmd->inbuf && cmd->infd =3D=3D -1) || (cmd->outbuf && cmd->outfdptr !=3D &cmd->outfd) || (cmd->errbuf && cmd->errfdptr !=3D &cmd->errfd)) { --=20 2.20.1 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list