[or-cvs] fix an edge case in parsing config options (thanks weasel)

[Roger Dingledine]

Update of /home2/or/cvsroot/tor/src/or
In directory moria.mit.edu:/home2/arma/work/onion/cvs/tor/src/or

Modified Files:
	config.c 
Log Message:
fix an edge case in parsing config options (thanks weasel)


Index: config.c
===================================================================
RCS file: /home2/or/cvsroot/tor/src/or/config.c,v
retrieving revision 1.305
retrieving revision 1.306
diff -u -d -r1.305 -r1.306
--- config.c	28 Jan 2005 08:53:47 -0000	1.305
+++ config.c	1 Feb 2005 00:05:57 -0000	1.306
@@ -508,6 +508,9 @@
 static config_var_t *config_find_option(const char *key)
 {
   int i;
+  size_t keylen = strlen(key);
+  if(!keylen)
+    return NULL; /* if they say "--" on the commandline, it's not an option */
   /* First, check for an exact (case-insensitive) match */
   for (i=0; config_vars[i].name; ++i) {
     if (!strcasecmp(key, config_vars[i].name))
@@ -515,7 +518,7 @@
   }
   /* If none, check for an abbreviated match */
   for (i=0; config_vars[i].name; ++i) {
-    if (!strncasecmp(key, config_vars[i].name, strlen(key))) {
+    if (!strncasecmp(key, config_vars[i].name, keylen)) {
       log_fn(LOG_WARN, "The abbreviation '%s' is deprecated. "
           "Tell Nick and Roger to make it official, or just use '%s' instead",
              key, config_vars[i].name);