From: Jeremy Allison <jra@samba.org> 
Date: Thu, 21 Jun 2001 19:56:25 +0000 (+0000)
Subject: Ok - I misspoke.... mmap returns MAP_FAILED, not neccessarily -1 :-).
X-Git-Tag: samba-2.2.5pre1~1890^2~75
X-Git-Url: http://git.samba.org/samba.git/?a=commitdiff_plain;h=2d1c6d1f6b55a0a78eb8afbe16d2ad8b3253a220;p=sfrench%2Fsamba-autobuild%2F.git

Ok - I misspoke.... mmap returns MAP_FAILED, not neccessarily -1 :-).
Jeremy.
---

diff --git a/source/tdb/tdb.c b/source/tdb/tdb.c
index c27f03fc35d..97c8e00ae68 100644
--- a/source/tdb/tdb.c
+++ b/source/tdb/tdb.c
@@ -66,6 +66,10 @@
 #define MAP_FILE 0
 #endif
 
+#ifndef MAP_FAILED
+#define MAP_FAILED ((void *)-1)
+#endif
+
 #define BUCKET(hash) ((hash) % tdb->header.hash_size)
 TDB_DATA tdb_null;
 
@@ -89,10 +93,10 @@ static void tdb_mmap(TDB_CONTEXT *tdb)
 				    MAP_SHARED|MAP_FILE, tdb->fd, 0);
 
 		/*
-		 * NB. When mmap fails it returns -1 *NOT* NULL !!!!
+		 * NB. When mmap fails it returns MAP_FAILED *NOT* NULL !!!!
 		 */
 
-		if (tdb->map_ptr == (void *)-1) {
+		if (tdb->map_ptr == MAP_FAILED) {
 			tdb->map_ptr = NULL;
 			TDB_LOG((tdb, 2, "tdb_mmap failed for size %d (%s)\n", 
 				 tdb->map_size, strerror(errno)));