[f16-branch] Handle strange lang boot argument values.

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First, internally translate '.utf8' to '.UTF-8' so it matches the
lang-table.

Second, if a language missing from the lang-table is used with lang=,
fallback on en_US.

Resolves: rhbz#731356
---
 loader/lang.c   |   33 +++++++++++++++++++++++++++++++--
 loader/lang.h   |    1 +
 loader/loader.c |    2 +-
 3 files changed, 33 insertions(+), 3 deletions(-)

diff --git a/loader/lang.c b/loader/lang.c
index 6b1fa8e..a11de14 100644
--- a/loader/lang.c
+++ b/loader/lang.c
@@ -36,6 +36,7 @@
 #include <sys/wait.h>
 #include <unistd.h>
 #include <wchar.h>
+#include <glib.h>
 
 #include "loader.h"
 #include "lang.h"
@@ -103,6 +104,14 @@ char * translateString(char * str) {
 static struct langInfo * languages = NULL;
 static int numLanguages = 0;
 
+static int defaultLanguageIndex(void) {
+    int i;
+    for (i = 0; i < numLanguages; ++i)
+        if (!strcmp(languages[i].lc_all, LANG_DEFAULT))
+            return i;
+    return -1;
+}
+
 static void loadLanguageList(void) {
     char * file = "/etc/lang-table";
     FILE * f;
@@ -144,6 +153,25 @@ int getLangInfo(struct langInfo ** langs) {
     return numLanguages;
 }
 
+/**
+ * Normalize the value of lang= boot argument.
+ *
+ * Currently only replaces the trailing .utf8 with .UTF-8.
+ *
+ * Returns a heap-allocated string.
+ */
+gchar *normalizeLang(const gchar *s)
+{
+    if (g_str_has_suffix(s, ".utf8")) {
+        gchar *lang = g_strndup(s, strlen(s) - strlen(".utf8"));
+        gchar *result = g_strconcat(lang, ".UTF-8", NULL);
+        g_free(lang);
+        return result;
+    }
+
+    return g_strdup(s);
+}
+
 void loadLanguage(void)
 {
     char *filename;
@@ -395,8 +423,9 @@ int setLanguage (const char * key, int forced) {
         }
     }
 
-    logMessage(ERROR, "unable to set to requested language %s", key);
-    return -1;
+    logMessage(ERROR, "unable to set the requested language '%s', "
+               "setting the default '%s'", key, LANG_DEFAULT);
+    return setupLanguage(defaultLanguageIndex(), forced | !FL_KICKSTART(flags));
 }
 
 int chooseLanguage(char ** lang) {
diff --git a/loader/lang.h b/loader/lang.h
index 168ffa3..d2f2d98 100644
--- a/loader/lang.h
+++ b/loader/lang.h
@@ -34,6 +34,7 @@ int chooseLanguage(char ** lang);
 char * translateString(char * str);
 int setLanguage (const char * key, int forced);
 int getLangInfo(struct langInfo **langs);
+char * normalizeLang(const char *s);
 
 extern const char *LANG_DEFAULT;
 
diff --git a/loader/loader.c b/loader/loader.c
index eedf439..cb8b7ab 100644
--- a/loader/loader.c
+++ b/loader/loader.c
@@ -992,7 +992,7 @@ static void parseCmdLineFlags(struct loaderData_s * loaderData) {
             } else if (!strcasecmp(k, "display")) {
                 setenv("DISPLAY", v, 1);
             } else if (!strcasecmp(k, "lang")) {
-                loaderData->lang = g_strdup(v);
+                loaderData->lang = normalizeLang(v);
                 loaderData->lang_set = 1;
             } else if (!strcasecmp(k, "keymap")) {
                 loaderData->kbd = g_strdup(v);
-- 
1.7.6.4

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