kconfig: Allow frontends to display messages themselves

Signed-off-by: Michal Marek <mmarek@suse.cz>

1 files changed, 29 insertions, 6 deletions

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index dc11d51bd8b3..c07060ab7820 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -19,6 +19,9 @@
 static void conf_warning(const char *fmt, ...)
         __attribute__ ((format (printf, 1, 2)));
 
+static void conf_message(const char *fmt, ...)
+        __attribute__ ((format (printf, 1, 2)));
+
 static const char *conf_filename;
 static int conf_lineno, conf_warnings, conf_unsaved;
 
@@ -35,6 +38,29 @@ static void conf_warning(const char *fmt, ...)
         conf_warnings++;
 }
 
+static void conf_default_message_callback(const char *fmt, va_list ap)
+{
+        printf("#\n# ");
+        vprintf(fmt, ap);
+        printf("\n#\n");
+}
+
+static void (*conf_message_callback) (const char *fmt, va_list ap) =
+        conf_default_message_callback;
+void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
+{
+        conf_message_callback = fn;
+}
+
+static void conf_message(const char *fmt, ...)
+{
+        va_list ap;
+
+        va_start(ap, fmt);
+        if (conf_message_callback)
+                conf_message_callback(fmt, ap);
+}
+
 const char *conf_get_configname(void)
 {
         char *name = getenv("KCONFIG_CONFIG");
@@ -184,9 +210,8 @@ int conf_read_simple(const char *name, int def)
                         name = conf_expand_value(prop->expr->left.sym->name);
                         in = zconf_fopen(name);
                         if (in) {
-                                printf(_("#\n"
-                                         "# using defaults found in %s\n"
-                                         "#\n"), name);
+                                conf_message(_("using defaults found in %s"),
+                                         name);
                                 goto load;
                         }
                 }
@@ -651,9 +676,7 @@ next:
                         return 1;
         }
 
-        printf(_("#\n"
-                 "# configuration written to %s\n"
-                 "#\n"), newname);
+        conf_message(_("configuration written to %s"), newname);
 
         sym_set_change_count(0);