Bugfixes.

* libmailutils/base/amd.c (amd_open): Return error if the mailbox
cannot be opened for the required access permissions.
(amd_message_stream_open): Fix condition for
determining r/w access.
* mh/mh_list.c (eval_extras): Break the loop if mu_header_aget_field_name
fails.

@@ -365,10 +365,15 @@ amd_open (mu_mailbox_t mailbox, int flags)
       else
 	return errno;
     }
-  
+    
   if (!S_ISDIR (st.st_mode))
     return EINVAL;
 
+  if (access (amd->name,
+	      (flags & (MU_STREAM_WRITE|MU_STREAM_APPEND)) ?
+	       W_OK : R_OK | X_OK))
+    return errno;
+
   if (mailbox->locker == NULL)
     mu_locker_create (&mailbox->locker, "/dev/null", 0);
   
@@ -1674,7 +1679,7 @@ amd_message_stream_open (struct _amd_message *mhm)
     }
   
   /* The message should be at least readable */
-  if (amd->mailbox->flags & (MU_STREAM_RDWR|MU_STREAM_WRITE|MU_STREAM_APPEND))
+  if (amd->mailbox->flags & (MU_STREAM_WRITE|MU_STREAM_APPEND))
     flags |= MU_STREAM_RDWR;
   else 
     flags |= MU_STREAM_READ;

-;; Default components file for GNU MH.
-;; Lines beginning with ; are ignored.  Rest of lines is copied verbatim.
 To: 
 cc: 
 Subject: 

-;; Default forward components file for GNU MH.
-;; Lines beginning with ; are ignored.  Rest of lines is copied verbatim.
 To:
 cc:
 Subject:

@@ -755,7 +755,8 @@ eval_extras (struct eval_env *env)
   mu_header_get_field_count (hdr, &num);
   for (i = 1; i <= num; i++)
     {
-      mu_header_aget_field_name (hdr, i, &str);
+      if (mu_header_aget_field_name (hdr, i, &str))
+	break;
       if (want_header (env, str)
 	  && !header_is_printed (env, str))
 	{