Merge r14277 and r14278: When opening a logfile fails, tell us why

svn:r14282

ChangeLog

@@ -5,6 +5,7 @@ Changes in version 0.2.0.24-?? - 2008-??-??
     - Do not read the configuration file when we've only been told to
       generate a password hash.  Fixes bug 643. Bugfix on 0.0.9pre5.  Fix
       based on patch from Sebastian Hahn.
+    - When opening a logfile fails, tell us why.
 
 Changes in version 0.2.0.23-rc - 2008-03-24
   o Major bugfixes:

src/or/config.c

@@ -3838,7 +3838,8 @@ options_init_logs(or_options_t *options, int validate_only)
       }
       if (!validate_only) {
         if (add_file_log(levelMin, levelMax, smartlist_get(elts, 2)) < 0) {
-          log_warn(LD_CONFIG, "Couldn't open file for 'Log %s'", opt->value);
+          log_warn(LD_CONFIG, "Couldn't open file for 'Log %s': %s",
+                   opt->value, strerror(errno));
           ok = 0;
         }
       }