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-rw-r--r--plugins/common.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/plugins/common.h b/plugins/common.h
index 6bf4fca..0f08e2f 100644
--- a/plugins/common.h
+++ b/plugins/common.h
@@ -225,4 +225,18 @@ enum {
225# define __attribute__(x) /* do nothing */ 225# define __attribute__(x) /* do nothing */
226#endif 226#endif
227 227
228/* Try sysconf(_SC_OPEN_MAX) first, as it can be higher than OPEN_MAX.
229 * If that fails and the macro isn't defined, we fall back to an educated
230 * guess. There's no guarantee that our guess is adequate and the program
231 * will die with SIGSEGV if it isn't and the upper boundary is breached. */
232#define DEFAULT_MAXFD 256 /* fallback value if no max open files value is set */
233#define MAXFD_LIMIT 8192 /* upper limit of open files */
234#ifdef _SC_OPEN_MAX
235static long maxfd = 0;
236#elif defined(OPEN_MAX)
237# define maxfd OPEN_MAX
238#else /* sysconf macro unavailable, so guess (may be wildly inaccurate) */
239# define maxfd DEFAULT_MAXFD
240#endif
241
228#endif /* _COMMON_H_ */ 242#endif /* _COMMON_H_ */