POSIX allows a null pointer, in which case the function only checks the validity of the clock id argument.
@@ -8,7 +8,7 @@ int clock_getres(clockid_t clk, struct timespec *ts)
if (SYS_clock_getres != SYS_clock_getres_time64) {
long ts32[2];
int r = __syscall(SYS_clock_getres, clk, ts32);
- if (!r) {
+ if (!r && ts) {
ts->tv_sec = ts32[0];
ts->tv_nsec = ts32[1];
}