tests: Wait for the server to start

The previous timeout of 500 ms was not enough on slower machines or
while running the tests under valgrind. On much faster machines the
sleep() was bringing unnecessary overhead.

This method opens simple connection to the server verifying it is ready
to accept the connection from the test for 5 seconds. It the server
does not start until then, it fails the tests during initialization,
rather than leaving the cases to run against missing server.

Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit c15ad753a7)

tests/CMakeLists.txt

@@ -31,6 +31,9 @@ add_library(${TORTURE_LIBRARY}
                 torture_pki.c
                 torture_cmocka.c)
 target_link_libraries(${TORTURE_LIBRARY} ${TORTURE_LINK_LIBRARIES})
+target_compile_options(${TORTURE_LIBRARY} PRIVATE
+                       -DSSH_PING_EXECUTABLE="${CMAKE_CURRENT_BINARY_DIR}/ssh_ping"
+)
 
 if (ARGP_LIBRARY)
     target_link_libraries(${TORTURE_LIBRARY}
@@ -87,6 +90,11 @@ if (CLIENT_TESTING)
         chroot_wrapper
     )
 
+    # ssh_ping
+    add_executable(ssh_ping ssh_ping.c)
+    target_compile_options(ssh_ping PRIVATE ${DEFAULT_C_COMPILE_FLAGS})
+    target_link_libraries(ssh_ping ${LIBSSH_SHARED_LIBRARY})
+
     # homedir will be used in passwd
     set(HOMEDIR ${CMAKE_CURRENT_BINARY_DIR}/home)