util: add is_locale_utf8()

journalctl and vconsole-setup both implement utf8 locale detection.
Let's have a common function for it.
The next patch will add another use.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/shared/util.h b/src/shared/util.h
index 284035c33b..b979b0e89f 100644
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -598,3 +598,5 @@ int parse_timestamp(const char *t, usec_t *usec);
 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
                  int (*compar) (const void *, const void *, void *),
                  void *arg);
+
+bool is_locale_utf8(void);