add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/tools/testing/selftests/timers/clocksource-switch.c
..
..
@@ -110,10 +110,10 @@
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 	sprintf(buf, "./inconsistency-check -t %i", secs);
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 	ret = system(buf);
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-	if (ret)
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-		return ret;
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+	if (WIFEXITED(ret) && WEXITSTATUS(ret))
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+		return WEXITSTATUS(ret);
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 	ret = system("./nanosleep");
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-	return ret;
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+	return WIFEXITED(ret) ? WEXITSTATUS(ret) : 0;
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 }
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