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#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
int main() {
int f = open("/", O_RDONLY);
printf("fsync(opened): %d\n", fsync(f));
printf("errno: %d\n", errno);
errno = 0;
printf("close(opened): %d\n", close(f));
printf("errno: %d\n", errno);
errno = 0;
printf("fsync(closed): %d\n", fsync(f));
printf("errno: %d\n", errno);
errno = 0;
printf("close(closed): %d\n", close(f));
printf("errno: %d\n", errno);
errno = 0;
return 0;
}
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