only execute last test when we are a pty Signed-off-by: Christian Brauner <christian.brauner@mailbox.org>

adapt lxc-attach tests & add test for pty logging The current tests for lxc-attach pty allocation and I/O redirection rely on the standard file descriptors of the test script to refer to a pty. If they do not the tests are effectively useless with respect to pty allocation. We need a test environment with the standard file descriptors refering to a pty as well. One solution is to run this test under the script command. This commit also adds a test whether pty logging works. This test is only executed when all standard file descriptors refer to a pty. Signed-off-by: Christian Brauner <christian.brauner@mailbox.org>

lxc-attach: update and improve tests Signed-off-by: Christian Brauner <christian.brauner@mailbox.org>

tests: add lxc-test-attach-test Test if the various types of I/O redirection work with lxc-attach. Signed-off-by: Christian Brauner <christian.brauner@mailbox.org>