Merge from vendor/bind9/dist as of the 9.4.2-P2 import

1 files changed, 73 insertions, 5 deletions

diff --git a/contrib/bind9/lib/isc/unix/resource.c b/contrib/bind9/lib/isc/unix/resource.c
index 703ec27..0264976 100644
--- a/contrib/bind9/lib/isc/unix/resource.c
+++ b/contrib/bind9/lib/isc/unix/resource.c
@@ -1,8 +1,8 @@
 /*
- * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 2004, 2008  Internet Systems Consortium, Inc. ("ISC")
  * Copyright (C) 2000, 2001  Internet Software Consortium.
  *
- * Permission to use, copy, modify, and distribute this software for any
+ * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
@@ -15,7 +15,7 @@
  * PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: resource.c,v 1.12 2004/03/05 05:11:46 marka Exp $ */
+/* $Id: resource.c,v 1.12.944.4 2008/07/28 22:44:46 marka Exp $ */
 
 #include <config.h>
 
@@ -28,6 +28,14 @@
 #include <isc/result.h>
 #include <isc/util.h>
 
+#ifdef __linux__
+#include <linux/fs.h>	/* To get the large NR_OPEN. */
+#endif
+
+#ifdef __hpux
+#include <sys/dyntune.h>
+#endif
+
 #include "errno2result.h"
 
 static isc_result_t
@@ -182,8 +190,51 @@ isc_resource_setlimit(isc_resource_t resource, isc_resourcevalue_t value) {
 
 	if (unixresult == 0)
 		return (ISC_R_SUCCESS);
-	else
-		return (isc__errno2result(errno));
+
+#if defined(OPEN_MAX) && defined(__APPLE__)
+	/*
+	 * The Darwin kernel doesn't accept RLIM_INFINITY for rlim_cur; the
+	 * maximum possible value is OPEN_MAX.  BIND8 used to use
+	 * sysconf(_SC_OPEN_MAX) for such a case, but this value is much
+	 * smaller than OPEN_MAX and is not really effective.
+	 */
+	if (resource == isc_resource_openfiles && rlim_value == RLIM_INFINITY) {
+		rl.rlim_cur = OPEN_MAX;
+		unixresult = setrlimit(unixresource, &rl);
+		if (unixresult == 0)
+			return (ISC_R_SUCCESS);
+	}
+#elif defined(NR_OPEN) && defined(__linux__)
+	/*
+	 * Some Linux kernels don't accept RLIM_INFINIT; the maximum
+	 * possible value is the NR_OPEN defined in linux/fs.h.
+	 */
+	if (resource == isc_resource_openfiles && rlim_value == RLIM_INFINITY) {
+		rl.rlim_cur = rl.rlim_max = NR_OPEN;
+		unixresult = setrlimit(unixresource, &rl);
+		if (unixresult == 0)
+			return (ISC_R_SUCCESS);
+	}
+#elif defined(__hpux)
+	if (resource == isc_resource_openfiles && rlim_value == RLIM_INFINITY) {
+		uint64_t maxfiles;
+		if (gettune("maxfiles_lim", &maxfiles) == 0) {
+			rl.rlim_cur = rl.rlim_max = maxfiles;
+			unixresult = setrlimit(unixresource, &rl);
+			if (unixresult == 0)
+				return (ISC_R_SUCCESS);
+		}
+	}
+#endif
+	if (resource == isc_resource_openfiles && rlim_value == RLIM_INFINITY) {
+		if (getrlimit(unixresource, &rl) == 0) {
+			rl.rlim_cur = rl.rlim_max;
+			unixresult = setrlimit(unixresource, &rl);
+			if (unixresult == 0)
+				return (ISC_R_SUCCESS);
+		}
+	}
+	return (isc__errno2result(errno));
 }
 
 isc_result_t
@@ -202,3 +253,20 @@ isc_resource_getlimit(isc_resource_t resource, isc_resourcevalue_t *value) {
 
 	return (result);
 }
+
+isc_result_t
+isc_resource_curlimit(isc_resource_t resource, isc_resourcevalue_t *value) {
+	int unixresult;
+	int unixresource;
+	struct rlimit rl;
+	isc_result_t result;
+
+	result = resource2rlim(resource, &unixresource);
+	if (result == ISC_R_SUCCESS) {
+		unixresult = getrlimit(unixresource, &rl);
+		INSIST(unixresult == 0);
+		*value = rl.rlim_cur;
+	}
+
+	return (result);
+}