svn commit: r207493 - stable/8/usr.sbin/config

[Warner Losh]

Author: imp
Date: Sun May  2 06:18:57 2010
New Revision: 207493
URL: http://svn.freebsd.org/changeset/base/207493

Log:
  MFC r207265:
    Require the option that's mapped be listed in the options file.  This
    will allow people with old config options to either have it just work
    (if config is new enough), or get a version error (if their config is
    about 7.0 or newer) rather than getting a cryptic error about
    duplicated options in the options file, or getting an error about an
    unknown option, at which point they'd update their config file only to
    learn they need a new config, only to learn they didn't really need to
    update their config file...  All this because our version checking was
    in the wrong place for the past decade...
  
    # hopefully this is the last change, and we'll be able to config with an
    # 8.0 GENERIC file on stable/8 after I merge this change and add the
    # compat options.

Modified:
  stable/8/usr.sbin/config/mkoptions.c
Directory Properties:
  stable/8/usr.sbin/config/   (props changed)

Modified: stable/8/usr.sbin/config/mkoptions.c
==============================================================================
--- stable/8/usr.sbin/config/mkoptions.c	Sun May  2 06:18:08 2010	(r207492)
+++ stable/8/usr.sbin/config/mkoptions.c	Sun May  2 06:18:57 2010	(r207493)
@@ -292,32 +292,49 @@ tooption(char *name)
 
 	
 static void
-insert_option(char *this, char *val, int flags)
+check_duplicate(const char *fname, const char *this)
 {
 	struct opt_list *po;
 
+	SLIST_FOREACH(po, &otab, o_next) {
+		if (eq(po->o_name, this)) {
+			printf("%s: Duplicate option %s.\n",
+			       fname, this);
+			exit(1);
+		}
+	}
+}
+
+static void
+insert_option(const char *fname, char *this, char *val)
+{
+	struct opt_list *po;
+
+	check_duplicate(fname, this);
 	po = (struct opt_list *) calloc(1, sizeof *po);
 	if (po == NULL)
 		err(EXIT_FAILURE, "calloc");
 	po->o_name = this;
 	po->o_file = val;
-	po->o_flags = flags;
+	po->o_flags = 0;
 	SLIST_INSERT_HEAD(&otab, po, o_next);
 }
 
-
 static void
-check_duplicate(const char *fname, const char *this)
+update_option(const char *this, char *val, int flags)
 {
 	struct opt_list *po;
 
 	SLIST_FOREACH(po, &otab, o_next) {
 		if (eq(po->o_name, this)) {
-			printf("%s: Duplicate option %s.\n",
-			       fname, this);
-			exit(1);
+			free(po->o_file);
+			po->o_file = val;
+			po->o_flags = flags;
+			return;
 		}
 	}
+	printf("Compat option %s not listed in options file.\n", this);
+	exit(1);
 }
 
 static int
@@ -355,8 +372,10 @@ read_option_file(const char *fname, int 
 			free(s);
 		}
 		val = ns(val);
-		check_duplicate(fname, this);
-		insert_option(this, val, flags);
+		if (flags == 0)
+			insert_option(fname, this, val);
+		else
+			update_option(this, val, flags);
 	}
 	(void)fclose(fp);
 	return (1);