change the "username map" option to allow the user to stop the

processing part way through the file if a match is found. If a line
starts with ! and a match is made by that line then processing
stops. This allows better wildcard handling.

(patch from Anselm.Kruis@Physik.Uni-Muenchen.DE)

docs/manpages/smb.conf.5

@@ -3524,6 +3524,11 @@ then continues with the next line.
 
 If any line begins with a '#' or a ';' then it is ignored
 
+If any line begins with an ! then the processing will stop after that
+line if a mapping was done by the line. Otherwise mapping continues
+with every line being processed. Using ! is most useful when you have
+a wildcard mapping line later in the file.
+
 For example to map from the name "admin" or "administrator" to the UNIX
 name "root" you would use
 
@@ -3544,6 +3549,14 @@ quotes around the name. For example:
 would map the windows username "Andrew Tridgell" to the unix username
 tridge.
 
+The following example would map mary and fred to the unix user sys,
+and map the rest to guest. Note the use of the ! to tell Samba to stop
+processing if it gets a match on that line.
+
+	!sys = mary fred
+	guest = *
+
+
 Note that the remapping is applied to all occurrences of
 usernames. Thus if you connect to "\e\eserver\efred" and "fred" is
 remapped to "mary" then you will actually be connecting to

source/lib/username.c

@@ -82,11 +82,19 @@ void map_username(char *user)
   for (; (s=fgets_slash(NULL,80,f)); free(s)) {
     char *unixname = s;
     char *dosname = strchr(unixname,'=');
+    BOOL break_if_mapped = False;
 
     if (!dosname) continue;
     *dosname++ = 0;
 
     while (isspace(*unixname)) unixname++;
+    if ('!' == *unixname)
+    {
+      break_if_mapped = True;
+      unixname++;
+      while (*unixname && isspace(*unixname)) unixname++;
+    }
+    
     if (!*unixname || strchr("#;",*unixname)) continue;
 
     {
@@ -102,6 +110,10 @@ void map_username(char *user)
       StrnCpy(last_from,user,sizeof(last_from)-1);
       sscanf(unixname,"%s",user);
       StrnCpy(last_to,user,sizeof(last_to)-1);
+      if(break_if_mapped) { 
+        free(s);
+        break;
+      }
     }
   }