If this flag is given, the child process will inherit the parent's stderr. Otherwise, the child's stderr will not be visible, but it will be captured to allow later tests with g_test_trap_assert_stderr().
If this flag is given, the child
process will inherit the parent's stdin. Otherwise, the child's
stdin is redirected to /dev/null.
If this flag is given, the child process will inherit the parent's stdout. Otherwise, the child's stdout will not be visible, but it will be captured to allow later tests with g_test_trap_assert_stdout().
Flags to pass to g_test_trap_subprocess() to control input and output.
Note that in contrast with g_test_trap_fork(), the default is to not show stdout and stderr.