Source Code for Module osh.trace

 1  # osh 
 2  # Copyright (C) Jack Orenstein <jao@geophile.com> 
 3  # 
 4  # This program is free software; you can redistribute it and/or modify 
 5  # it under the terms of the GNU General Public License as published by 
 6  # the Free Software Foundation; either version 2 of the License, or 
 7  # (at your option) any later version. 
 8  # 
 9  # This program is distributed in the hope that it will be useful, 
10  # but WITHOUT ANY WARRANTY; without even the implied warranty of 
11  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
12  # GNU General Public License for more details. 
13  # 
14  # You should have received a copy of the GNU General Public License 
15  # along with this program; if not, write to the Free Software 
16  # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 
17   
18  import sys 
19   
20  tracefile = None 
21   
22 -def on(tracefile_name, append = False): 
23      global tracefile 
24      if tracefile is None: 
25          if tracefile_name: 
26              if append: 
27                  tracefile = open(tracefile_name, 'a') 
28              else: 
29                  tracefile = open(tracefile_name, 'w') 
30          else: 
31              tracefile = sys.stdout 
32   
33 -def off(): 
34      tracefile.close() 
35      tracefile = None 
36       
37 -def trace(message): 
38      if tracefile: 
39          print >>tracefile, message 
40          tracefile.flush() 
41