/* getdtablesize() function for platforms that don't have it.
- Copyright (C) 2008-2015 Free Software Foundation, Inc.
+ Copyright (C) 2008-2016 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2008.
This program is free software: you can redistribute it and/or modify
return dtablesize;
}
-#elif HAVE_GETDTABLESIZE
+#else
+# include <limits.h>
# include <sys/resource.h>
-# undef getdtablesize
-int
-rpl_getdtablesize(void)
-{
- /* To date, this replacement is only compiled for Cygwin 1.7.25,
- which auto-increased the RLIMIT_NOFILE soft limit until it
- hits the compile-time constant hard limit of 3200. Although
- that version of cygwin supported a child process inheriting
- a smaller soft limit, the smaller limit is not enforced, so
- we might as well just report the hard limit. */
- struct rlimit lim;
- if (!getrlimit (RLIMIT_NOFILE, &lim) && lim.rlim_max != RLIM_INFINITY)
- return lim.rlim_max;
- return getdtablesize ();
-}
+# ifndef RLIM_SAVED_CUR
+# define RLIM_SAVED_CUR RLIM_INFINITY
+# endif
+# ifndef RLIM_SAVED_MAX
+# define RLIM_SAVED_MAX RLIM_INFINITY
+# endif
-#elif defined _SC_OPEN_MAX
+# 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)
{
- return sysconf (_SC_OPEN_MAX);
+ 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;
}
#endif