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[tor-commits] [arm/release] fix: writing blank torrc without GETINFO option



commit c94f7669daecea8994561e25e7f2c3ed6f44d478
Author: Damian Johnson <atagar@xxxxxxxxxxxxxx>
Date:   Wed Jul 20 07:44:23 2011 -0700

    fix: writing blank torrc without GETINFO option
    
    When "GETINFO config-text" we save a blank torrc rather than providing the
    user with an error. This option was introduced in Tor 0.2.2.7. Caught by Runa
    (https://trac.torproject.org/projects/tor/ticket/3614).
---
 src/util/torConfig.py |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/src/util/torConfig.py b/src/util/torConfig.py
index e4570ca..557dc09 100644
--- a/src/util/torConfig.py
+++ b/src/util/torConfig.py
@@ -415,6 +415,19 @@ def saveConf(destination = None, contents = None):
   if not contents: contents = currentConfig
   else: isSaveconf &= contents == currentConfig
   
+  # The "GETINFO config-text" option was introduced in Tor version 0.2.2.7. If
+  # we're writing custom contents then this is fine, but if we're trying to
+  # save the current configuration then we need to fail if it's unavailable.
+  # Otherwise we'd write a blank torrc as per...
+  # https://trac.torproject.org/projects/tor/ticket/3614
+  
+  if contents == ['']:
+    # double check that "GETINFO config-text" is unavailable rather than just
+    # giving an empty result
+    
+    if torTools.getConn().getInfo("config-text") == None:
+      raise IOError("determining the torrc requires Tor version 0.2.2.7")
+  
   currentLocation = None
   try:
     currentLocation = getConfigLocation()



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