Add Caveat: Readers need write access. Whitespace.

libraries/liblmdb/lmdb.h

@@ -66,6 +66,10 @@
  *	  BSD systems or when otherwise configured with MDB_USE_POSIX_SEM.
  *	  Multiple users can cause startup to fail later, as noted above.
  *
+ *	- There is normally no pure read-only mode, since readers need write
+ *	  access to locks and lock file. Exceptions: On read-only filesystems
+ *	  or with the #MDB_NOLOCK flag described under #mdb_env_open().
+ *
  *	- A thread can only use one transaction at a time, plus any child
  *	  transactions.  Each transaction belongs to one thread.  See below.
  *	  The #MDB_NOTLS flag changes this for read-only transactions.
@@ -489,7 +493,7 @@ int  mdb_env_create(MDB_env **env);
 	 *		like wild pointer writes and other bad updates into the database.
 	 *		Incompatible with nested transactions.
 	 *		Processes with and without MDB_WRITEMAP on the same environment do
-	 *		not cooperate well. 
+	 *		not cooperate well.
 	 *	<li>#MDB_NOMETASYNC
 	 *		Flush system buffers to disk only once per transaction, omit the
 	 *		metadata flush. Defer that until the system flushes files to disk,

libraries/liblmdb/mdb.c

@@ -8258,7 +8258,7 @@ static int mdb_pid_insert(pid_t *ids, pid_t pid)
 			return -1;
 		}
 	}
-	
+
 	if( val > 0 ) {
 		++cursor;
 	}

libraries/liblmdb/mdb_stat.c

@@ -199,7 +199,7 @@ int main(int argc, char *argv[])
 		printf("mdb_open failed, error %d %s\n", rc, mdb_strerror(rc));
 		goto txn_abort;
 	}
-   
+
 	rc = mdb_stat(txn, dbi, &mst);
 	if (rc) {
 		printf("mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));

libraries/liblmdb/midl.c

@@ -59,7 +59,7 @@ unsigned mdb_midl_search( MDB_IDL ids, MDB_ID id )
 			return cursor;
 		}
 	}
-	
+
 	if( val > 0 ) {
 		++cursor;
 	}
@@ -89,7 +89,7 @@ int mdb_midl_insert( MDB_IDL ids, MDB_ID id )
 		/* no room */
 		--ids[0];
 		return -2;
-	
+
 	} else {
 		/* insert id */
 		for (i=ids[0]; i>x; i--)