add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/tools/testing/selftests/proc/proc-uptime-002.c
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@@ -17,6 +17,7 @@
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 // while shifting across CPUs.
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 #undef NDEBUG
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 #include <assert.h>
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+#include <errno.h>
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 #include <unistd.h>
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 #include <sys/syscall.h>
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 #include <stdlib.h>
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@@ -54,7 +55,7 @@
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 		len += sizeof(unsigned long);
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 		free(m);
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 		m = malloc(len);
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-	} while (sys_sched_getaffinity(0, len, m) == -EINVAL);
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+	} while (sys_sched_getaffinity(0, len, m) == -1 && errno == EINVAL);
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 	fd = open("/proc/uptime", O_RDONLY);
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 	assert(fd >= 0);