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tests/libqtest.c: Delete possible stale unix sockets 

Occasionally if a test crashes or is interrupted by the user
at the wrong moment it could leave behind a stale UNIX
socket in /tmp/. This will then cause a subsequent test
run to fail spuriously with
 tests/libqtest.c:70:init_socket: assertion failed (ret != -1): (-1 != -1)
if it happens to reuse the same PID.

Defend against this by deleting any stray stale socket before
trying to open the new ones for this test.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1490963801-27870-1-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2017-03-31 13:36:41 +01:00
parent b1a419ec79
commit d9123d09f7
1 changed files with 8 additions and 0 deletions
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8
tests/libqtest.c
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@ -167,6 +167,14 @@ QTestState *qtest_init_without_qmp_handshake(const char *extra_args)
socket_path = g_strdup_printf("/tmp/qtest-%d.sock", getpid());
qmp_socket_path = g_strdup_printf("/tmp/qtest-%d.qmp", getpid());
/* It's possible that if an earlier test run crashed it might
* have left a stale unix socket lying around. Delete any
* stale old socket to avoid spurious test failures with
* tests/libqtest.c:70:init_socket: assertion failed (ret != -1): (-1 != -1)
*/
unlink(socket_path);
unlink(qmp_socket_path);
sock = init_socket(socket_path);
qmpsock = init_socket(qmp_socket_path);