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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <errno.h>
int main(int argc, char *argv[])
{
struct timespec ts;
char *p;
if (argc != 2)
goto err;
p = strtotimespec(argv[1], &ts);
if (*p)
goto err;
while (nanosleep(&ts, &ts) == -1 && errno == EINTR)
;
return 0;
err:
fprintf(stderr, "Usage: %s seconds[.fraction]\n", argv[0]);
return 1;
}
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