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[79.176.118.93]) by smtp.gmail.com with ESMTPSA id p1sm879970wrx.3.2020.11.03.20.52.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Nov 2020 20:52:20 -0800 (PST) Date: Tue, 3 Nov 2020 23:52:19 -0500 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Subject: [PULL v2 36/38] vhost-user-blk-test: close fork child file descriptors Message-ID: <20201104044937.226370-37-mst@redhat.com> References: <20201104044937.226370-1-mst@redhat.com> MIME-Version: 1.0 In-Reply-To: <20201104044937.226370-1-mst@redhat.com> X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mst@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Received-SPF: pass client-ip=216.205.24.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/03 00:03:41 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Peter Maydell , Thomas Huth , Stefan Hajnoczi , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Stefan Hajnoczi Do not leave stdin, stdout, stderr open after fork. stdout is the tap-driver.pl pipe. If we keep the pipe open then tap-driver.pl will not detect that qos-test has terminated and it will hang. Signed-off-by: Stefan Hajnoczi Message-Id: <20201027173528.213464-11-stefanha@redhat.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- tests/qtest/vhost-user-blk-test.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/tests/qtest/vhost-user-blk-test.c b/tests/qtest/vhost-user-blk-test.c index f05f14c192..15daf8ccbc 100644 --- a/tests/qtest/vhost-user-blk-test.c +++ b/tests/qtest/vhost-user-blk-test.c @@ -749,6 +749,17 @@ static char *start_vhost_user_blk(GString *cmd_line, int vus_instances, storage_daemon_command->str); pid_t pid = fork(); if (pid == 0) { + /* + * Close standard file descriptors so tap-driver.pl pipe detects when + * our parent terminates. + */ + close(0); + close(1); + close(2); + open("/dev/null", O_RDONLY); + open("/dev/null", O_WRONLY); + open("/dev/null", O_WRONLY); + execlp("/bin/sh", "sh", "-c", storage_daemon_command->str, NULL); exit(1); }