+#else
+
+# include <limits.h>
+# include <sys/resource.h>
+
+# ifndef RLIM_SAVED_CUR
+# define RLIM_SAVED_CUR RLIM_INFINITY
+# endif
+# ifndef RLIM_SAVED_MAX
+# define RLIM_SAVED_MAX RLIM_INFINITY
+# endif
+
+# ifdef __CYGWIN__
+ /* Cygwin 1.7.25 auto-increases the RLIMIT_NOFILE soft limit until it
+ hits the compile-time constant hard limit of 3200. We might as
+ well just report the hard limit. */
+# define rlim_cur rlim_max
+# endif
+
+int
+getdtablesize (void)
+{
+ struct rlimit lim;
+
+ if (getrlimit (RLIMIT_NOFILE, &lim) == 0
+ && 0 <= lim.rlim_cur && lim.rlim_cur <= INT_MAX
+ && lim.rlim_cur != RLIM_INFINITY
+ && lim.rlim_cur != RLIM_SAVED_CUR
+ && lim.rlim_cur != RLIM_SAVED_MAX)
+ return lim.rlim_cur;
+
+ return INT_MAX;
+}
+