locale: gen_wc8bit: try to find UTF8 locale automatically

Rather than require everyone to have en_US.UTF-8 when we really need any
UTF8 locale, do a scan for possible UTF8 locales if the default en_US does
not exist.  Hopefully this should make the utility "just work" for most
people.

Reported-by: Daniel Cordero <theappleman@gmail.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/extra/locale/gen_wc8bit.c b/extra/locale/gen_wc8bit.c
index 418a1ac..126cd1a 100644 (file)
--- a/extra/locale/gen_wc8bit.c
+++ b/extra/locale/gen_wc8bit.c
@@ -98,8 +98,31 @@ int main(int argc, char **argv)
        int total_size = 0;
 
        if (!setlocale(LC_CTYPE, "en_US.UTF-8")) {
-               printf("setlocale(LC_CTYPE,\"en_US.UTF-8\") failed!\n");
+               /* Silly foreigners disabling en_US locales */
+               FILE *fp = popen("locale -a", "r");
+               if (!fp)
+                       goto locale_failure;
+
+               while (!feof(fp)) {
+                       char buf[256];
+                       size_t len;
+
+                       if (fgets(buf, sizeof(buf) - 10, fp) == NULL)
+                               goto locale_failure;
+
+                       len = strlen(buf);
+                       if (buf[len - 1] == '\n')
+                               buf[--len] = '\0';
+                       strcat(buf, ".UTF8");
+                       if (setlocale(LC_CTYPE, buf))
+                               goto locale_success;
+               }
+
+ locale_failure:
+               printf("could not find a UTF8 locale ... please enable en_US.UTF-8\n");
                return EXIT_FAILURE;
+ locale_success:
+               pclose(fp);
        }
 
        if (!(out = fopen("c8tables.h","w"))) {