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#define _GNU_SOURCE
#include <unistd.h>
#include <limits.h>
#include <sys/resource.h>
int getdtablesize(void)
{
struct rlimit rl;
getrlimit(RLIMIT_NOFILE, &rl);
return rl.rlim_max < INT_MAX ? rl.rlim_max : INT_MAX;
}
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