tests/qtest: vhost-user-test: Fix [-Werror=format-overflow=] build warning
commit1c324bf908e3de1cf352e36484c73dc07767d938
authorBin Meng <bin.meng@windriver.com>
Mon, 17 Oct 2022 13:20:23 +0000 (17 21:20 +0800)
committerLaurent Vivier <laurent@vivier.eu>
Sat, 22 Oct 2022 21:17:06 +0000 (22 23:17 +0200)
treec987d32051bdb416d9fecb8ce3796f59fc564d6b
parentb1f6208cf986a60e1c9f8b960db5a00851f48f98
tests/qtest: vhost-user-test: Fix [-Werror=format-overflow=] build warning

When tmpfs is NULL, a build warning is seen with GCC 9.3.0.
It's strange that GCC 11.2.0 on Ubuntu 22.04 does not catch this,
neither did the QEMU CI.

While we are here, improve the error message as well.

Reported-by: Shengjiang Wu <shengjiang.wu@windriver.com>
Fixes: e6efe236c1d1 ("tests/qtest: vhost-user-test: Avoid using hardcoded /tmp")
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221017132023.2228641-2-bmeng.cn@gmail.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
tests/qtest/vhost-user-test.c