glibc will print "(null)" if we pass a null pointer as the argument for
a %s conversion, but it is not a standard behavior.
Change-Id: I85a6b4d571a60e7f3755d13722247e7494998a94
Signed-off-by: wuzhouhui <wuzhouhui@kingsoft.com>
Reviewed-on: https://review.gerrithub.io/431725
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
1ab092348a