--- a/sites/irclogs.qmsk.net/log_source.py	Sun Feb 08 02:29:23 2009 +0200
+++ b/sites/irclogs.qmsk.net/log_source.py	Sun Feb 08 02:55:53 2009 +0200
@@ -63,7 +63,7 @@
 
         # read offset
         # XXX; why -2 ?
-        offset = self.file.tell() - 2
+        size = offset = self.file.tell() - 2
 
         # use this blocksize
         BLOCKSIZE = 1024
@@ -73,21 +73,25 @@
 
         # read a block at a time, backwards
         while  count > 0 and offset >= 0:
-            # update offset
+            # update offset back one block
             offset -= BLOCKSIZE
 
             # normalize to zero
             if offset < 0 :
                 offset = 0
 
-            # seek backwards one block
+            # seek to offset
             self.file.seek(offset)
 
             # add the new block to our buffer
             read_buf = self.file.read(BLOCKSIZE)
 
+            # XXX: trim off extra...
+            if len(read_buf) > BLOCKSIZE :
+                read_buf = read_buf[:BLOCKSIZE]
+
             # make sure we got the right amount of data
-            assert len(read_buf) == BLOCKSIZE, "read(%d) -> %d" % (BLOCKSIZE, len(read_buf))
+            assert len(read_buf) == BLOCKSIZE, "read(%d) @ %d/%d -> %d" % (BLOCKSIZE, offset, size, len(read_buf))
 
             # add in our previous buf
             buf = read_buf + buf
@@ -99,7 +103,7 @@
             buf = buf_lines[0]
 
             # add up to count lines to our lines buffer
-            lines = buf_lines[1:count + 1] + lines
+            lines = buf_lines[-min(count, len(buf_lines) - 1):] + lines
 
             # update count
             count -= (len(buf_lines) - 1)